Maryam Forghani - Academia.edu (original) (raw)

Papers by Maryam Forghani

Research paper thumbnail of Immunohistological Evaluation of Revascularized Immature Permanent Necrotic Teeth Treated by Platelet-Rich Plasma: An Animal Investigation

Cell journal, 2016

Pulp regeneration within the root canal of necrotic teeth is considered an ideal treatment to all... more Pulp regeneration within the root canal of necrotic teeth is considered an ideal treatment to allow for continued root development and recover teeth vitality. This study aims to evaluate the inductive effect of platelet-rich plasma (PRP) on expression of angiogenesis factors and pulpal revascularization of immature necrotic teeth. In this experimental animal study, we randomly divided 28 immature premolars from two mixed breed dogs into four groups, two experimental, negative and a positive control. Premolars in negative control group were left intact to develop normally. In the positive control and experimental groups, we removed the pulps and induced pulp necrosis, after which the chambers were sealed. Then, we applied the revascularization protocol in the experimental teeth located in the right quadrant. Two months later, the same protocol was applied to the left quadrant. The root canals were disinfected by irrigation with sodium hypochlorite (NaOCl) solution and application a t...

Research paper thumbnail of Assessment of Root Perforation within Simulated Internal Resorption Cavities Using Cone-beam Computed Tomography

Journal of Endodontics, 2015

Internal root resorption lesions may perforate external root surfaces, which may not be detectabl... more Internal root resorption lesions may perforate external root surfaces, which may not be detectable on conventional radiographic images. The purpose of this study was to evaluate the accuracy of cone-beam computed tomographic (CBCT) imaging in the detection of small perforations within simulated internal resorption cavities. Artificial internal root resorption cavities with minimal (0.1-0.2 mm) wall thickness were prepared at 64 sites on buccal and lingual halves of 32 single-rooted mandibular teeth that had been split mesiodistally. Perforations with 0.5-mm diameters were produced using a #40 K-file in half of the specimens. All teeth were placed in dry sheep mandibles and imaged using a NewTomVGi CBCT scanner (6 × 6 cm field of view, 0.1-mm resolution; NewTomQR srl, Verona, Italy). Two observers evaluated the images. Interexaminer and intraexaminer agreement were assessed using the kappa statistic. Sensitivity, specificity, and predictive values were used to assess diagnostic accuracy. Intra- and interobserver agreement on perforation detection were high. The sensitivity and specificity of CBCT-based detection of perforation in internal root resorption were 81.3% and 84.4%, respectively. CBCT imaging is useful for perforation detection in internal root resorption defects.

Research paper thumbnail of Vital Pulp Therapy with Three Different Pulpotomy Agents in Immature Molars: A Case Report

Iranian Endodontic Journal, 2013

Article Type: Case Report Introduction: This case report describes apexogenesis treatment of thre... more Article Type: Case Report Introduction: This case report describes apexogenesis treatment of three molar teeth of an 8-year-old boy using three different pulpotomy agents. Methods: Pulpotomy was performed on decayed immature molar teeth with established irreversible pulpitis and the remaining pulp was capped with either zinc oxide eugenol, ProRoot mineral trioxide aggregate or calcium-enriched mixture (CEM) cement. Teeth were restored with stainless steel crowns. Results: Eighteen months clinical and radiographic follow-up revealed successful preservation of pulpal vitality with continued root development in all treated teeth. Conclusion: Based on this case report, CEM cement may be an alternative option for pulpotomy treatment of immature permanent molars.

Research paper thumbnail of The efficacy of laser-assisted in-office bleaching and home bleaching on sound and demineralized enamel

LASER THERAPY, 2015

This study investigated the effectiveness of laser-assisted in-office bleaching and home-bleachin... more This study investigated the effectiveness of laser-assisted in-office bleaching and home-bleaching in sound and demineralized enamel. The sample consisted of 120 freshly-extracted bovine incisors. Half of the specimens were stored in a demineralizing solution to induce white spot lesions. Following exposure to a tea solution for 7.5 days, the specimens were randomly assigned to 4 groups of 30 according to the type of enamel and the bleaching procedure employed. Groups 1 and 2 consisted of demineralized teeth subjected to in-office bleaching and home bleaching, whereas in groups 3 and 4, sound teeth were subjected to in-office and home bleaching, respectively. A diode laser (810 nm, 2 W, continuous wave, four times for 15 seconds each) was employed for assisting the in-office process. The color of the specimens was measured before (T1) and after (T2) staining and during (T3) and after (T4) the bleaching procedures using a spectrophotometer. The color change (ΔE) between different treatments stages was compared among the groups. There were significant differences in the color change between T2 and T3 (ΔE T2-T3) and T2 and T4 (ΔE T2-T4) stages among the study groups (p<0.05). Pairwise comparison by Duncan test revealed that both ΔET2-T3 and ΔET2-T4 were significantly greater in demineralized teeth submitted to laser-assisted in-office bleaching (group 1) as compared to the other groups (P< 0.05). Laser-assisted in-office bleaching could provide faster and greater whitening effect than home bleaching on stained demineralized enamel, but both procedures produced comparable results on sound teeth.

Research paper thumbnail of Clinical and radiographic evaluation of vital pulp therapy in open apex teeth with MTA and ZOE

The New York state dental journal

The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA... more The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA) and zinc oxide eugenol (ZOE) as vital pulp therapy agents in immature permanent teeth with carious or traumatic pulp exposure. Subjects were children with permanent teeth requiring pulpotomy (apexogenesis) and without systemic diseases. Both ZOE and MTA treatments as pulpotomy agents showed clinical and radiographic success in immature permanent teeth. Although MTA was more successful, it is more expensive, and dentin bridges may develop over canal orifices, complicating future root canal therapy.

Research paper thumbnail of New approaches in vital pulp therapy in permanent teeth

Iranian endodontic journal, 2014

Vitality of dental pulp is essential for long-term tooth survival. The aim of vital pulp therapy ... more Vitality of dental pulp is essential for long-term tooth survival. The aim of vital pulp therapy is to maintain healthy pulp tissue by eliminating bacteria from the dentin-pulp complex. There are several different treatment options for vital pulp therapy in extensively decayed or traumatized teeth. Pulp capping or pulpotomy procedures rely upon an accurate assessment of the pulp status, and careful management of the remaining pulp tissue. The purpose of this review is to provide an overview of new approaches in vital pulp therapy in permanent teeth.

Research paper thumbnail of Vital pulp therapy with three different pulpotomy agents in immature molars: a case report

Iranian endodontic journal, 2013

This case report describes apexogenesis treatment of three molar teeth of an 8-year-old boy using... more This case report describes apexogenesis treatment of three molar teeth of an 8-year-old boy using three different pulpotomy agents. Pulpotomy was performed on decayed immature molar teeth with established irreversible pulpitis and the remaining pulp was capped with either zinc oxide eugenol, ProRoot mineral trioxide aggregate or calcium-enriched mixture (CEM) cement. Teeth were restored with stainless steel crowns. Eighteen months clinical and radiographic follow-up revealed successful preservation of pulpal vitality with continued root development in all treated teeth. Based on this case report, CEM cement may be an alternative option for pulpotomy treatment of immature permanent molars.

Research paper thumbnail of Residual dentin thickness of bifurcated maxillary premolars following two post space preparation methods

Iranian endodontic journal, 2013

The aim of this in vitro study was to compare the effect of Gates-Glidden and Peeso reamer drills... more The aim of this in vitro study was to compare the effect of Gates-Glidden and Peeso reamer drills on residual dentin thickness during post space preparation in order to discover which method has minimum root structure damage. Thirty extracted human maxillary premolars with bifurcations at root middle were horizontally cut 15 mm coronal to the apical end after root canal treatment. The samples were scannedby Cone Beam Computed Tomography (CBCT) before and after preparing the post space. Residual dentin thicknesses were measured at 4-, 6-, and 8-mm levels from the apex. Data were analyzed using repeated measured ANOVA. Endodontic therapy and post space preparations removed more dentin within the bifurcation of both roots compared to outer dentin. The difference in residual dentin thickness was highly significant regarding stage (before and after post space preparation) in all levels and stage × device in coronal and middle levels (P<.05). This in vitro study emphasizes the minimal ...

Research paper thumbnail of Clinical and radiographic evaluation of vital pulp therapy in open apex teeth with MTA and ZOE

The New York state dental journal, 2012

The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA... more The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA) and zinc oxide eugenol (ZOE) as vital pulp therapy agents in immature permanent teeth with carious or traumatic pulp exposure. Subjects were children with permanent teeth requiring pulpotomy (apexogenesis) and without systemic diseases. Both ZOE and MTA treatments as pulpotomy agents showed clinical and radiographic success in immature permanent teeth. Although MTA was more successful, it is more expensive, and dentin bridges may develop over canal orifices, complicating future root canal therapy.

Research paper thumbnail of Apexogenesis and revascularization treatment procedures for two traumatized immature permanent maxillary incisors: a case report

Restorative Dentistry & Endodontics, 2013

Traumatic injuries to an immature permanent tooth may result in cessation of dentin deposition an... more Traumatic injuries to an immature permanent tooth may result in cessation of dentin deposition and root maturation. Endodontic treatment is often complicated in premature tooth with an uncertain prognosis. This article describes successful treatment of two traumatized maxillary central incisors with complicated crown fracture three months after trauma. The radiographic examination showed immature roots in maxillary central incisors of a 9-year-old boy with a radiolucent lesion adjacent to the right central incisor. Apexogenesis was performed for the left central incisor and revascularization treatment was considered for the right one. In 18-month clinical and radiographic follow-up both teeth were asymptomatic, roots continued to develop, and periapical radiolucency of the right central incisor healed. Considering the root development of these contralateral teeth it can be concluded that revascularization is an appropriate treatment method in immature necrotic teeth. (Restor Dent Endod 2013;38(3):178-181)

Research paper thumbnail of Immunohistochemical Evaluation of Fibronectin and Tenascin Following Direct Pulp Capping with Mineral Trioxide Aggregate, Platelet-Rich Plasma and Propolis in Dogs' Teeth

Iranian endodontic journal, 2015

The aim of the present study was to evaluate the expression of fibronectin (FN) and tenascin (TN)... more The aim of the present study was to evaluate the expression of fibronectin (FN) and tenascin (TN) after direct pulp capping (DPC) in dogs' teeth with either mineral trioxide aggregate (MTA), Propolis or Platelet-rich plasma (PRP), by means of immunohistochemistry. A total of 48 sound molars and premolars with mature apices from four dogs, were included. The teeth were randomly divided into 4 groups according to the material used for DPC: PRP, Propolis, MTA, and glass-ionomer (as the negative control group). Each group was divided into two 7-day and 30-day subgroups. The teeth were restored at the same session. The animals were sacrificed at the mentioned time intervals and the expression of FN and TN in each test group and between each time intervals was assessed with Wilcoxon and Mann-Whitney U tests, respectively. The Kruskal-Wallis test was used to compare FN and TN staining among the test groups. The significance level was set at 0.05. The amount of FN in the MTA group in th...

Research paper thumbnail of Conservative Treatment of an Invaginated Maxillary Lateral Incisor with a C-shaped Canal Using Cone-Beam Computed Tomography

Iranian endodontic journal, 2015

This report describes the non-surgical treatment of an invaginated maxillary lateral incisor with... more This report describes the non-surgical treatment of an invaginated maxillary lateral incisor with two fused roots. The mesial root had a C-shaped canal, while the distal one had a type III dens invagination. Cone-beam computed tomography (CBCT) was used to help with the diagnosis and treatment decision making. Clinical and radiographic follow-up revealed satisfactory periapical repair and absence of symptoms after 15 months.

Research paper thumbnail of Bacterial Leakage Assessment for Different Types of Resin-Based Dental Restorations Applied Using Various Placement Methods

Journal of Dental Materials and Techniques, Sep 1, 2014

Research paper thumbnail of Effect of MTA and Portland cement on fracture resistance of dentin

Journal of Dental Research Dental Clinics Dental Prospects, May 30, 2013

It is important to evaluate the effects of endodontic materials on tooth structures to avoid endo... more It is important to evaluate the effects of endodontic materials on tooth structures to avoid endodontic treatment failure. The aim of the present study was to investigate the effect of mineral trioxide aggregates (MTA) and

Research paper thumbnail of Evaluating Resin-Dentin Bond by Microtensile Bond Strength Test: Effects of Various Resin Composites and Placement Techniques

The Open Dentistry Journal, 2015

This in vitro study evaluated the microtensile bond strength (MTBS) of a methacrylate-based compa... more This in vitro study evaluated the microtensile bond strength (MTBS) of a methacrylate-based compared to a silorane-based resin composite in Class I cavity using different placement techniques. Class I cavities with dimension of (4 mm long, 4 mm wide, 3 mm deep) were prepared in extracted sound human molars. The teeth were randomly divided into six groups. The first three groups were filled with Filtek P90 using three methods of insertion; bulk, incremental and snow-plow, and the remaining three groups were filled with Clearfil AP-X using the same three placement techniques. After 24 hours of storage in water at 37°C, the specimens were thermocycled to 1000 cycles. Specimens were prepared for MTBS testing by creating bonded beams obtained from the pulpal floor. Statistical analyses of data were performed by two-way ANOVA/Tukey (α=.05). The experiment showed significant differences between the two resin composites with regard to filling techniques (P&amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05). The MTBS was significantly higher in each of Filtek P90 subgroup compared to Clearfil AP-X ones (P&amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05). With respect to filling technique in both resin composites, bulk insertion showed the significantly lowest MTBS (P&amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05), while no significant difference was found between the outcome of incremental and snow-plow techniques (P&amp;amp;amp;amp;amp;amp;amp;amp;gt;0.05). Silorane-based resin composite as opposed to methacrylate based resin composite and layering placements in contrast to bulk filling method had higher microtensile bond strength.

Research paper thumbnail of In vitro evaluation of tooth discolouration induced by mineral trioxide aggregate Fillapex and iRoot SP endodontic sealers

Australian Endodontic Journal, 2016

The purpose of this study was to evaluate the tooth discolouration potential of two new calcium-s... more The purpose of this study was to evaluate the tooth discolouration potential of two new calcium-silicate-based sealers (mineral trioxide aggregate (MTA) Fillapex and iRoot SP). Sixty premolars were resected below the coronal third of the root. Pulp chamber was instrumented and irrigated via the apical access. Samples were randomly assigned into groups A (MTA Fillapex), B (AH plus), C (iRoot SP) and D (unfilled as control). Colour assessment was performed at baseline, 1st, 3rd and 6th months with an intraoral spectrophotometer. Analysis of variance with additional multiple comparisons of post hoc were used for statistical analysis. All sealers caused perceptible tooth discolouration and there was no statistically significant difference between them. Discolouration progressed within the first 3 months and then decreased until the 6th month.

Research paper thumbnail of Endodontic treatment of a maxillary central incisor with two roots

The Journal of Contemporary Dental Practice, 2013

AIM: This clinical report presents a rare case of maxillary central incisor with two separate roo... more AIM: This clinical report presents a rare case of maxillary central incisor with two separate roots.BACKGROUND: Unusual morphology of the roots and root canals may exist in any tooth. Recognition of the dental anatomy and its variations is necessary for successful endodontic therapy. It is well known that maxillary incisors are usually single-rooted teeth.CASE REPORT: The root canals were instrumented with conventional hand files and Gates Glidden and obturated by using the lateral technique. Recall radiograph after 1 year shows the healing process of the preoperative apical periodontitis.CONCLUSION AND CLINICAL SIGNIFICANCE: Clinicians should be aware of unexpected root canal morphology when performing root canal therapy. The present case demonstrated the importance of accurate preoperative radiograph and adequate access preparation.

Research paper thumbnail of Vital Bleaching of Tetracycline-Stained Teeth by Using KTP Laser: A Case Report

European journal of dentistry

Bleaching of discolored teeth is one of the most important topics in aesthetic dentistry. A great... more Bleaching of discolored teeth is one of the most important topics in aesthetic dentistry. A great challenge in this area is obtaining good results in tetracycline-stained teeth. The wavelength and features of KTP laser, which is a type of Nd:YAG laser, seem to be appropriate for bleaching of these teeth. This case report underlines the importance of knowledge about the photochemical bleaching by using the KTP laser and its side effects on soft tissues. (Eur J Dent 2009;3:229-232)

Research paper thumbnail of In Vitro Comparison of Apical Leakage in Root Canals Obturated with 0.04 and 0.02 Tapered Gutta-Percha

Iranian Endodontic Journal

Introduction: Gutta-percha is the most commonly used material for root canal obturation; it has b... more Introduction: Gutta-percha is the most commonly used material for root canal obturation; it has been recently manufactured with different tapers. The aim of this in vitro study was to compare microleakage of canals obturated with standard gutta-percha (0.02 taper) or the new 0.04 taper gutta-percha master cone using the cold lateral condensation technique.

Research paper thumbnail of Fracture Resistance and Failure Mode of Endodontically Treated Premolars Restored with Different Adhesive Restorations

Introduction: The restoration of endodontically treated teeth is a topic that has been studied ex... more Introduction: The restoration of endodontically treated teeth is a topic that has been studied extensively but it is still a challenge for dental practitioners. The aim of this study was to evaluate fracture resistance, fracture patterns and fracture location of endodontically treated human maxillary premolars restored with direct and indirect composite resin and ceramic restoration. Methods: Eighty non-carious maxillary premolars were selected and divided into four groups (n=20). Endodontic treatment and mesio-occluso-distal preparations were carried out in all the groups except for the control group (group I). Subsequently, the prepared teeth were restored as follows: group II: indirect composite restoration; group III: ceramic restoration; group IV: direct composite restoration. The specimens were subjected to compressive axial loading until fracture occurred. The mode of failure was also recorded. Results: Group I had higher fracture resistance (1196.82±241.74) than the other gr...

Research paper thumbnail of Immunohistological Evaluation of Revascularized Immature Permanent Necrotic Teeth Treated by Platelet-Rich Plasma: An Animal Investigation

Cell journal, 2016

Pulp regeneration within the root canal of necrotic teeth is considered an ideal treatment to all... more Pulp regeneration within the root canal of necrotic teeth is considered an ideal treatment to allow for continued root development and recover teeth vitality. This study aims to evaluate the inductive effect of platelet-rich plasma (PRP) on expression of angiogenesis factors and pulpal revascularization of immature necrotic teeth. In this experimental animal study, we randomly divided 28 immature premolars from two mixed breed dogs into four groups, two experimental, negative and a positive control. Premolars in negative control group were left intact to develop normally. In the positive control and experimental groups, we removed the pulps and induced pulp necrosis, after which the chambers were sealed. Then, we applied the revascularization protocol in the experimental teeth located in the right quadrant. Two months later, the same protocol was applied to the left quadrant. The root canals were disinfected by irrigation with sodium hypochlorite (NaOCl) solution and application a t...

Research paper thumbnail of Assessment of Root Perforation within Simulated Internal Resorption Cavities Using Cone-beam Computed Tomography

Journal of Endodontics, 2015

Internal root resorption lesions may perforate external root surfaces, which may not be detectabl... more Internal root resorption lesions may perforate external root surfaces, which may not be detectable on conventional radiographic images. The purpose of this study was to evaluate the accuracy of cone-beam computed tomographic (CBCT) imaging in the detection of small perforations within simulated internal resorption cavities. Artificial internal root resorption cavities with minimal (0.1-0.2 mm) wall thickness were prepared at 64 sites on buccal and lingual halves of 32 single-rooted mandibular teeth that had been split mesiodistally. Perforations with 0.5-mm diameters were produced using a #40 K-file in half of the specimens. All teeth were placed in dry sheep mandibles and imaged using a NewTomVGi CBCT scanner (6 × 6 cm field of view, 0.1-mm resolution; NewTomQR srl, Verona, Italy). Two observers evaluated the images. Interexaminer and intraexaminer agreement were assessed using the kappa statistic. Sensitivity, specificity, and predictive values were used to assess diagnostic accuracy. Intra- and interobserver agreement on perforation detection were high. The sensitivity and specificity of CBCT-based detection of perforation in internal root resorption were 81.3% and 84.4%, respectively. CBCT imaging is useful for perforation detection in internal root resorption defects.

Research paper thumbnail of Vital Pulp Therapy with Three Different Pulpotomy Agents in Immature Molars: A Case Report

Iranian Endodontic Journal, 2013

Article Type: Case Report Introduction: This case report describes apexogenesis treatment of thre... more Article Type: Case Report Introduction: This case report describes apexogenesis treatment of three molar teeth of an 8-year-old boy using three different pulpotomy agents. Methods: Pulpotomy was performed on decayed immature molar teeth with established irreversible pulpitis and the remaining pulp was capped with either zinc oxide eugenol, ProRoot mineral trioxide aggregate or calcium-enriched mixture (CEM) cement. Teeth were restored with stainless steel crowns. Results: Eighteen months clinical and radiographic follow-up revealed successful preservation of pulpal vitality with continued root development in all treated teeth. Conclusion: Based on this case report, CEM cement may be an alternative option for pulpotomy treatment of immature permanent molars.

Research paper thumbnail of The efficacy of laser-assisted in-office bleaching and home bleaching on sound and demineralized enamel

LASER THERAPY, 2015

This study investigated the effectiveness of laser-assisted in-office bleaching and home-bleachin... more This study investigated the effectiveness of laser-assisted in-office bleaching and home-bleaching in sound and demineralized enamel. The sample consisted of 120 freshly-extracted bovine incisors. Half of the specimens were stored in a demineralizing solution to induce white spot lesions. Following exposure to a tea solution for 7.5 days, the specimens were randomly assigned to 4 groups of 30 according to the type of enamel and the bleaching procedure employed. Groups 1 and 2 consisted of demineralized teeth subjected to in-office bleaching and home bleaching, whereas in groups 3 and 4, sound teeth were subjected to in-office and home bleaching, respectively. A diode laser (810 nm, 2 W, continuous wave, four times for 15 seconds each) was employed for assisting the in-office process. The color of the specimens was measured before (T1) and after (T2) staining and during (T3) and after (T4) the bleaching procedures using a spectrophotometer. The color change (ΔE) between different treatments stages was compared among the groups. There were significant differences in the color change between T2 and T3 (ΔE T2-T3) and T2 and T4 (ΔE T2-T4) stages among the study groups (p&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05). Pairwise comparison by Duncan test revealed that both ΔET2-T3 and ΔET2-T4 were significantly greater in demineralized teeth submitted to laser-assisted in-office bleaching (group 1) as compared to the other groups (P&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.05). Laser-assisted in-office bleaching could provide faster and greater whitening effect than home bleaching on stained demineralized enamel, but both procedures produced comparable results on sound teeth.

Research paper thumbnail of Clinical and radiographic evaluation of vital pulp therapy in open apex teeth with MTA and ZOE

The New York state dental journal

The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA... more The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA) and zinc oxide eugenol (ZOE) as vital pulp therapy agents in immature permanent teeth with carious or traumatic pulp exposure. Subjects were children with permanent teeth requiring pulpotomy (apexogenesis) and without systemic diseases. Both ZOE and MTA treatments as pulpotomy agents showed clinical and radiographic success in immature permanent teeth. Although MTA was more successful, it is more expensive, and dentin bridges may develop over canal orifices, complicating future root canal therapy.

Research paper thumbnail of New approaches in vital pulp therapy in permanent teeth

Iranian endodontic journal, 2014

Vitality of dental pulp is essential for long-term tooth survival. The aim of vital pulp therapy ... more Vitality of dental pulp is essential for long-term tooth survival. The aim of vital pulp therapy is to maintain healthy pulp tissue by eliminating bacteria from the dentin-pulp complex. There are several different treatment options for vital pulp therapy in extensively decayed or traumatized teeth. Pulp capping or pulpotomy procedures rely upon an accurate assessment of the pulp status, and careful management of the remaining pulp tissue. The purpose of this review is to provide an overview of new approaches in vital pulp therapy in permanent teeth.

Research paper thumbnail of Vital pulp therapy with three different pulpotomy agents in immature molars: a case report

Iranian endodontic journal, 2013

This case report describes apexogenesis treatment of three molar teeth of an 8-year-old boy using... more This case report describes apexogenesis treatment of three molar teeth of an 8-year-old boy using three different pulpotomy agents. Pulpotomy was performed on decayed immature molar teeth with established irreversible pulpitis and the remaining pulp was capped with either zinc oxide eugenol, ProRoot mineral trioxide aggregate or calcium-enriched mixture (CEM) cement. Teeth were restored with stainless steel crowns. Eighteen months clinical and radiographic follow-up revealed successful preservation of pulpal vitality with continued root development in all treated teeth. Based on this case report, CEM cement may be an alternative option for pulpotomy treatment of immature permanent molars.

Research paper thumbnail of Residual dentin thickness of bifurcated maxillary premolars following two post space preparation methods

Iranian endodontic journal, 2013

The aim of this in vitro study was to compare the effect of Gates-Glidden and Peeso reamer drills... more The aim of this in vitro study was to compare the effect of Gates-Glidden and Peeso reamer drills on residual dentin thickness during post space preparation in order to discover which method has minimum root structure damage. Thirty extracted human maxillary premolars with bifurcations at root middle were horizontally cut 15 mm coronal to the apical end after root canal treatment. The samples were scannedby Cone Beam Computed Tomography (CBCT) before and after preparing the post space. Residual dentin thicknesses were measured at 4-, 6-, and 8-mm levels from the apex. Data were analyzed using repeated measured ANOVA. Endodontic therapy and post space preparations removed more dentin within the bifurcation of both roots compared to outer dentin. The difference in residual dentin thickness was highly significant regarding stage (before and after post space preparation) in all levels and stage × device in coronal and middle levels (P<.05). This in vitro study emphasizes the minimal ...

Research paper thumbnail of Clinical and radiographic evaluation of vital pulp therapy in open apex teeth with MTA and ZOE

The New York state dental journal, 2012

The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA... more The purpose of this study was to report the success rate of using mineral trioxide aggregate (MTA) and zinc oxide eugenol (ZOE) as vital pulp therapy agents in immature permanent teeth with carious or traumatic pulp exposure. Subjects were children with permanent teeth requiring pulpotomy (apexogenesis) and without systemic diseases. Both ZOE and MTA treatments as pulpotomy agents showed clinical and radiographic success in immature permanent teeth. Although MTA was more successful, it is more expensive, and dentin bridges may develop over canal orifices, complicating future root canal therapy.

Research paper thumbnail of Apexogenesis and revascularization treatment procedures for two traumatized immature permanent maxillary incisors: a case report

Restorative Dentistry & Endodontics, 2013

Traumatic injuries to an immature permanent tooth may result in cessation of dentin deposition an... more Traumatic injuries to an immature permanent tooth may result in cessation of dentin deposition and root maturation. Endodontic treatment is often complicated in premature tooth with an uncertain prognosis. This article describes successful treatment of two traumatized maxillary central incisors with complicated crown fracture three months after trauma. The radiographic examination showed immature roots in maxillary central incisors of a 9-year-old boy with a radiolucent lesion adjacent to the right central incisor. Apexogenesis was performed for the left central incisor and revascularization treatment was considered for the right one. In 18-month clinical and radiographic follow-up both teeth were asymptomatic, roots continued to develop, and periapical radiolucency of the right central incisor healed. Considering the root development of these contralateral teeth it can be concluded that revascularization is an appropriate treatment method in immature necrotic teeth. (Restor Dent Endod 2013;38(3):178-181)

Research paper thumbnail of Immunohistochemical Evaluation of Fibronectin and Tenascin Following Direct Pulp Capping with Mineral Trioxide Aggregate, Platelet-Rich Plasma and Propolis in Dogs' Teeth

Iranian endodontic journal, 2015

The aim of the present study was to evaluate the expression of fibronectin (FN) and tenascin (TN)... more The aim of the present study was to evaluate the expression of fibronectin (FN) and tenascin (TN) after direct pulp capping (DPC) in dogs' teeth with either mineral trioxide aggregate (MTA), Propolis or Platelet-rich plasma (PRP), by means of immunohistochemistry. A total of 48 sound molars and premolars with mature apices from four dogs, were included. The teeth were randomly divided into 4 groups according to the material used for DPC: PRP, Propolis, MTA, and glass-ionomer (as the negative control group). Each group was divided into two 7-day and 30-day subgroups. The teeth were restored at the same session. The animals were sacrificed at the mentioned time intervals and the expression of FN and TN in each test group and between each time intervals was assessed with Wilcoxon and Mann-Whitney U tests, respectively. The Kruskal-Wallis test was used to compare FN and TN staining among the test groups. The significance level was set at 0.05. The amount of FN in the MTA group in th...

Research paper thumbnail of Conservative Treatment of an Invaginated Maxillary Lateral Incisor with a C-shaped Canal Using Cone-Beam Computed Tomography

Iranian endodontic journal, 2015

This report describes the non-surgical treatment of an invaginated maxillary lateral incisor with... more This report describes the non-surgical treatment of an invaginated maxillary lateral incisor with two fused roots. The mesial root had a C-shaped canal, while the distal one had a type III dens invagination. Cone-beam computed tomography (CBCT) was used to help with the diagnosis and treatment decision making. Clinical and radiographic follow-up revealed satisfactory periapical repair and absence of symptoms after 15 months.

Research paper thumbnail of Bacterial Leakage Assessment for Different Types of Resin-Based Dental Restorations Applied Using Various Placement Methods

Journal of Dental Materials and Techniques, Sep 1, 2014

Research paper thumbnail of Effect of MTA and Portland cement on fracture resistance of dentin

Journal of Dental Research Dental Clinics Dental Prospects, May 30, 2013

It is important to evaluate the effects of endodontic materials on tooth structures to avoid endo... more It is important to evaluate the effects of endodontic materials on tooth structures to avoid endodontic treatment failure. The aim of the present study was to investigate the effect of mineral trioxide aggregates (MTA) and

Research paper thumbnail of Evaluating Resin-Dentin Bond by Microtensile Bond Strength Test: Effects of Various Resin Composites and Placement Techniques

The Open Dentistry Journal, 2015

This in vitro study evaluated the microtensile bond strength (MTBS) of a methacrylate-based compa... more This in vitro study evaluated the microtensile bond strength (MTBS) of a methacrylate-based compared to a silorane-based resin composite in Class I cavity using different placement techniques. Class I cavities with dimension of (4 mm long, 4 mm wide, 3 mm deep) were prepared in extracted sound human molars. The teeth were randomly divided into six groups. The first three groups were filled with Filtek P90 using three methods of insertion; bulk, incremental and snow-plow, and the remaining three groups were filled with Clearfil AP-X using the same three placement techniques. After 24 hours of storage in water at 37°C, the specimens were thermocycled to 1000 cycles. Specimens were prepared for MTBS testing by creating bonded beams obtained from the pulpal floor. Statistical analyses of data were performed by two-way ANOVA/Tukey (α=.05). The experiment showed significant differences between the two resin composites with regard to filling techniques (P&amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05). The MTBS was significantly higher in each of Filtek P90 subgroup compared to Clearfil AP-X ones (P&amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05). With respect to filling technique in both resin composites, bulk insertion showed the significantly lowest MTBS (P&amp;amp;amp;amp;amp;amp;amp;amp;lt;0.05), while no significant difference was found between the outcome of incremental and snow-plow techniques (P&amp;amp;amp;amp;amp;amp;amp;amp;gt;0.05). Silorane-based resin composite as opposed to methacrylate based resin composite and layering placements in contrast to bulk filling method had higher microtensile bond strength.

Research paper thumbnail of In vitro evaluation of tooth discolouration induced by mineral trioxide aggregate Fillapex and iRoot SP endodontic sealers

Australian Endodontic Journal, 2016

The purpose of this study was to evaluate the tooth discolouration potential of two new calcium-s... more The purpose of this study was to evaluate the tooth discolouration potential of two new calcium-silicate-based sealers (mineral trioxide aggregate (MTA) Fillapex and iRoot SP). Sixty premolars were resected below the coronal third of the root. Pulp chamber was instrumented and irrigated via the apical access. Samples were randomly assigned into groups A (MTA Fillapex), B (AH plus), C (iRoot SP) and D (unfilled as control). Colour assessment was performed at baseline, 1st, 3rd and 6th months with an intraoral spectrophotometer. Analysis of variance with additional multiple comparisons of post hoc were used for statistical analysis. All sealers caused perceptible tooth discolouration and there was no statistically significant difference between them. Discolouration progressed within the first 3 months and then decreased until the 6th month.

Research paper thumbnail of Endodontic treatment of a maxillary central incisor with two roots

The Journal of Contemporary Dental Practice, 2013

AIM: This clinical report presents a rare case of maxillary central incisor with two separate roo... more AIM: This clinical report presents a rare case of maxillary central incisor with two separate roots.BACKGROUND: Unusual morphology of the roots and root canals may exist in any tooth. Recognition of the dental anatomy and its variations is necessary for successful endodontic therapy. It is well known that maxillary incisors are usually single-rooted teeth.CASE REPORT: The root canals were instrumented with conventional hand files and Gates Glidden and obturated by using the lateral technique. Recall radiograph after 1 year shows the healing process of the preoperative apical periodontitis.CONCLUSION AND CLINICAL SIGNIFICANCE: Clinicians should be aware of unexpected root canal morphology when performing root canal therapy. The present case demonstrated the importance of accurate preoperative radiograph and adequate access preparation.

Research paper thumbnail of Vital Bleaching of Tetracycline-Stained Teeth by Using KTP Laser: A Case Report

European journal of dentistry

Bleaching of discolored teeth is one of the most important topics in aesthetic dentistry. A great... more Bleaching of discolored teeth is one of the most important topics in aesthetic dentistry. A great challenge in this area is obtaining good results in tetracycline-stained teeth. The wavelength and features of KTP laser, which is a type of Nd:YAG laser, seem to be appropriate for bleaching of these teeth. This case report underlines the importance of knowledge about the photochemical bleaching by using the KTP laser and its side effects on soft tissues. (Eur J Dent 2009;3:229-232)

Research paper thumbnail of In Vitro Comparison of Apical Leakage in Root Canals Obturated with 0.04 and 0.02 Tapered Gutta-Percha

Iranian Endodontic Journal

Introduction: Gutta-percha is the most commonly used material for root canal obturation; it has b... more Introduction: Gutta-percha is the most commonly used material for root canal obturation; it has been recently manufactured with different tapers. The aim of this in vitro study was to compare microleakage of canals obturated with standard gutta-percha (0.02 taper) or the new 0.04 taper gutta-percha master cone using the cold lateral condensation technique.

Research paper thumbnail of Fracture Resistance and Failure Mode of Endodontically Treated Premolars Restored with Different Adhesive Restorations

Introduction: The restoration of endodontically treated teeth is a topic that has been studied ex... more Introduction: The restoration of endodontically treated teeth is a topic that has been studied extensively but it is still a challenge for dental practitioners. The aim of this study was to evaluate fracture resistance, fracture patterns and fracture location of endodontically treated human maxillary premolars restored with direct and indirect composite resin and ceramic restoration. Methods: Eighty non-carious maxillary premolars were selected and divided into four groups (n=20). Endodontic treatment and mesio-occluso-distal preparations were carried out in all the groups except for the control group (group I). Subsequently, the prepared teeth were restored as follows: group II: indirect composite restoration; group III: ceramic restoration; group IV: direct composite restoration. The specimens were subjected to compressive axial loading until fracture occurred. The mode of failure was also recorded. Results: Group I had higher fracture resistance (1196.82±241.74) than the other gr...