davood nodehi - Academia.edu (original) (raw)
Papers by davood nodehi
Avicenna Journal of Dental Research, Sep 29, 2023
The passivity of the fit may be at risk during the casting as well as the firing of the veneering... more The passivity of the fit may be at risk during the casting as well as the firing of the veneering ceramic. In this study, the comparison of the passivity between computer-aided design/computer-assisted manufacturing (CAD/CAM) implant frameworks and three different conventional techniques before and after applying veneering porcelain was investigated. Methods: In this laboratory cross-sectional study, four groups (n = 6) of 3-unit screw-retained implantsupported denture prostheses (ISDPs) were fabricated on a master model with 2 implants. The study groups were as follows: conventional casting with Ni-Cr alloy (group 1), casting with Ni-Cr alloy followed by sectioning and soldering the samples (group 2), double casting with Ni-Cr framework (group 3), and using CAD/CAM-fabricated framework (group 4). All frameworks received porcelain veneer. The one-screw test was performed before and after veneering to measure the vertical misfit at the abutment-framework interface using a stereomicroscope. The mean vertical misfit values were determined at the buccal, lingual, and proximal aspects. The data were analyzed using the Kruskal-Wallis and post hoc tests (α = 0.05). The accuracy of the fit varied significantly before and after veneering among the study groups (P < 0.001). Frameworks prepared with CAD/CAM showed lower mean marginal misfit values compared to the other fabrication methods (P < 0.001). Conclusions: Firing the veneering porcelain attached to a screw-retained ISDP may have an adverse effect on the accuracy of the fit. Soft non-pre-sintered CAD/CAM frameworks had better passivity compared to other three conventional methods applied.
International Journal of Contemporary Dental and Medical Reviews, Jul 18, 2015
The present article evaluates various clinical applications of cone-beam computed tomography (CBC... more The present article evaluates various clinical applications of cone-beam computed tomography (CBCT). Among scientifi c articles, research was conducted by PubMed on the dental application of CBCT, containing many articles, in general, among which most of them were clinically about dentistry and its related analyses. Diff erent functionalities of CBCT, including oral and maxillofacial surgery, root treatment, implantology, orthodontics, temporomandibular joint dysfunction, periodontics, and forensic dentistry have been indicated in the study. The aim of this review paper is to summarize the CBCT applications in various fi elds of dentistry. Also, this review article illustrates that diff erent CBCT indicators have been used concerning the need for the certain discipline of dentistry and the kind of conducted procedure.
International Journal of Prosthodontics, 2020
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2022
Background and Objective: Designing a tooth preparation method for endocrown construction is effe... more Background and Objective: Designing a tooth preparation method for endocrown construction is effective in achieving clinical success. Considering that our knowledge about pulp chamber preparation is insufficient, this study was conducted with the aim of comparing the fracture strength of upper molar and premolar teeth treated with endocrown-reconstructed root based on two different methods of pulp chamber preparation. Methods: In this laboratory study, 15 upper molars and 15 premolars were divided into three groups. The first group (5 healthy teeth) was considered as the control group. The teeth of the second and third groups of root treatment were mounted in an acrylic JIG and their crowns were cut 2 mm above the CEJ. In the second group, the undercut of the pulp chamber wall was eliminated by a dental lathe. In the third group, the undercut was blocked by resin-modified glass ionomer (RMGI) cement. The teeth of the second and third groups were scanned by a laboratory scanner and restored and cemented with lithium disilicate glass ceramic endocrown (EMAXCAD, Ivoclar Vivadent). Then, all the teeth were subjected to a fracture strength test by a universal testing machine with a crosshead speed of 1 mm/min. Findings: The fracture strength of premolar teeth of group two (883.160±186.6) and group three (880.380±262.6) showed no significant difference. The fracture strength of molar teeth of group two (960.120±444.4) and group three (1290.740±400.7) was not significantly different. The mean fracture strength of healthy molars (2194.400±375.4) was significantly higher than restored molars (p<0.05). In terms of fracture type (repairable/non-repairable), there was no significant difference between molar and premolar teeth in the studied groups. Conclusion: Based on the results of this study, two methods of eliminating the undercut or blocking out the pulp chamber with restorative materials can be used to make endocrowns in upper posterior teeth.
International Journal of Contemporary Dental and Medical Reviews, May 24, 2015
To enjoy from an effective and efficient oral health care and its required guidelines, a modern p... more To enjoy from an effective and efficient oral health care and its required guidelines, a modern population should have an in-depth understanding of the disease impact. Periodontitis is one the most significant causes of bone loss and its relationship with some systematic conditions has been approved. The aim of the present article was to evaluate extensively the effect of health status and oral abnormalities on life quality. Scant attention, however, has been paid to the periodontitis impact on life quality. The study is a summary of researches conducted on the effect of periodontitis on oral healthrelated quality of life (OHRQoL). Related studies were gathered after searches made in Medline and PubMed electronic databases. Then, topic, abstracts, and data extraction were investigated. Most related studies reported the negative effect of periodontitis on OHRQoL. However, the reported standards were not similar in various studies. Moreover, most studies were conducted in developed countries.
International Journal of Dentistry, Sep 22, 2022
Journal of Mashhad Dental School, 2021
Introduction: The high success rate of implant treatments has made it one of the most common trea... more Introduction: The high success rate of implant treatments has made it one of the most common treatments in dentistry. Nevertheless, we are witnessing an increase in the side effects of implant treatments, such as esthetic problems. The present study aimed to evaluate the aesthetic indices (e.g., pink esthetic score (PES) and White Esthetic Score (WES)in dental implants delivered in the Implant Departmentof Mashhad Dentistry School in 2017-2019. Materials and Methods: The present study was conducted on 20 Patients with single implant in the anterior region of the maxilla whoseprosthetic work was completed in 2017. After cementing the crown, the photographs and casts of patients were prepared and evaluated for aesthetic indicators. The PES index included papillary mesial, papaldistal, gingival margin arch, gingival margin surface, bony prominence of root and color area, as well assoft tissue texture. The WES index encompassed tooth shape, color and surface texture, as well as transluc...
International Journal of Contemporary Dental and Medical Reviews, 2015
The present article evaluates various clinical applications of cone-beam computed tomography (CBC... more The present article evaluates various clinical applications of cone-beam computed tomography (CBCT). Among scientific articles, research was conducted by PubMed on the dental application of CBCT, containing many articles, in general, among which most of them were clinically about dentistry and its related analyses. Different functionalities of CBCT, including oral and maxillofacial surgery, root treatment, implantology, orthodontics, temporomandibular joint dysfunction, periodontics, and forensic dentistry have been indicated in the study. The aim of this review paper is to summarize the CBCT applications in various fields of dentistry. Also, this review article illustrates that diff erent CBCT indicators have been used concerning the need for the certain discipline of dentistry and the kind of conducted procedure.
Journal of Dental Materials and Techniques, 2020
Introduction: Our goal is to demonstrate an appliance that can prevent post-burn microstomia. Per... more Introduction: Our goal is to demonstrate an appliance that can prevent post-burn microstomia. Perioral burns result in contracture of facial tissue during healing. It may cause limited oral access due to the sphincteral nature of orbicularis oris muscle. The literature has demonstrated that burn contractures and scar formation can be modified with pressure and splinting. Technique: The patient was a 50-year-old woman who had a 3rd degree burn. She had been treated with medicinal and palliative treatments, but due to burn scar that involved all her peri-oral tissues she had progressive microstomia. We fabricated microstomia prevention device for her in order to prevent further progression of microstomia. As the patient was completely edentulous, we decided to fabricate a tissue-supported appliance. Conclusion: This appliance is made with very simple equipment and is easy to fabricate.
International Journal of Contemporary Dental and Medical Reviews, 2015
To enjoy from an effective and efficient oral health care and its required guidelines, a modern p... more To enjoy from an effective and efficient oral health care and its required guidelines, a modern population should have an in-depth understanding of the disease impact. Periodontitis is one the most significant causes of bone loss and its relationship with some systematic conditions has been approved. The aim of the present article was to evaluate extensively the effect of health status and oral abnormalities on life quality. Scant attention, however, has been paid to the periodontitis impact on life quality. The study is a summary of researches conducted on the effect of periodontitis on oral health-related quality of life (OHRQoL). Related studies were gathered after searches made in Medline and PubMed electronic databases. Then, topic, abstracts, and data extraction were investigated. Most related studies reported the negative effect of periodontitis on OHRQoL. However, the reported standards were not similar in various studies. Moreover, most studies were conducted in developed c...
future of medical education journal, 2013
Background: When the lesson plan is performed correctly in the classroom, the value of this progr... more Background: When the lesson plan is performed correctly in the classroom, the value of this program and the time spent for it are exactly clarified. The aim of this study is to survey the coordination of theoretical lessons teaching for the students of dentistry in the ninth term in comparison with the lesson plans presented in 1388. Methods: A copy of all lesson plans offered in the ninth term,1388, with a compact disk of classroom teaching were given to ten sharp students who were active in class participation. According to what they learned in the classes and also listening to the CDs, they addressed the presence or absence of the topics presented in the lesson plans. The collected data were statistically described based on mean frequencies of addressed topics. Results:lesson plans of 5 courses ,from the 7 theoretical courses offered, were accessible .It was found that the coordination rate of lesson plans in comparison with the teachers’ presentation in the pediatrics course...
Journal of Advanced Oral Research, 2021
Aim: The aim of this study was to evaluate the effect of the ozonated water on corrosion of a cob... more Aim: The aim of this study was to evaluate the effect of the ozonated water on corrosion of a cobalt–chromium (Co-Cr)-based alloy, which is applied for the fabrication of metal frameworks of removable partial dentures. Materials and Methods: In this in vitro study, a total of 30 disk-shaped samples of a Co-Cr alloy were papered and randomly divided into two groups of 15 specimens. In group 1 (control), the specimens were stored in distilled water (DW), and in group 2, the specimens were stored in ozonated water. Around 90 immersions were performed, and the weight change of each specimen was determined. The ion release was analyzed using an inductively coupled plasma-optical emission spectrophotometer. The potentiodynamic polarization test was performed for each group to assess the corrosion resistance of the Co-Cr alloy. The statistical analysis was performed using SPSS version 22. Data were analyzed by independent samples’ t-test. Results: The results showed no significant differen...
The International Journal of Prosthodontics, 2020
Acta informatica medica : AIM : journal of the Society for Medical Informatics of Bosnia & Herzegovina : casopis Drustva za medicinsku informatiku BiH, 2017
Due to increasing demands for a full mouth implant reconstructions and the fact that the most fai... more Due to increasing demands for a full mouth implant reconstructions and the fact that the most failures are associated with biomechanical complications, determining the effect of different occlusal patterns on these complications seems inevitable. The aim of this study is to compare affection of different occlusal designs in full mouth implant reconstructed patients on electromyographic activity of temporal and masseter muscles compared to natural dentition. Thirty-two patients were included in this study, considering that 16 patients had natural dentition and the other 16 were full mouth implant reconstruction patients. In both groups, the participants were divided into two subgroups: 8 patients had canine guidance occlusal pattern and the other eight had a group function occlusal pattern. Muscle contractions were studied during both maximum intercuspation and lateral excursions to the point of intercanine contact using an electromyography device. The average percentages of masseter...
Journal of Dental and Allied Sciences, 2016
Background: Intrusive luxation is apical displacement of tooth into the alveolar bone due to bicy... more Background: Intrusive luxation is apical displacement of tooth into the alveolar bone due to bicycle accidents, sports accidents, falls, and fights. Intruded tooth is driven into the socket, compressing the periodontal ligament. Intrusion is considered as one of the most severe luxation injuries to affect permanent dentition. Intrusion injuries are often associated with severe damage to the tooth, periodontium, and pulpal tissue. The rare occurrence of this injury in the permanent dentition has resulted in limited studies to support suggested treatment regimens. Clinical treatment for intrusion is especially important because of the severe complications accompanying trauma. Case Report: This article reports traumatically intrusion of permanent maxillary central incisor which was followed by definite guidelines existed in management of traumatically Intruded permanent teeth. Also article is an overview of all available articles which are relevant with intrusion and provides all treatment modalities which are considered beneficial up today. Conclusion: Instant care and root canal treatment for intruded tooth can play a major role in correcting the tooth position and subsequently improving function and appearance. Therefore, clinician's knowledge and skills has a crucial role in managing intrusive luxation.
International Journal of Dentistry
Purpose. Restoration of endodontically treated premolars has always been considered as a challeng... more Purpose. Restoration of endodontically treated premolars has always been considered as a challenging procedure. This study compared the fracture strength and mode of failure of root canal treated premolars reconstructed with various post and core systems. Materials and Methods. Twenty healthy extracted premolars were selected and underwent root canal treatment and then randomly assigned into 4 groups (n = 5). The teeth in group 1 restored with amalgam, whereas others reconstructed with post and cores made by cobalt-chromium (Co-Cr) casting (group 2), nonprecious gold (NPG) casting (group 3), or computer-aided design (CAD) and computer-aided manufacturing (CAM) milling (group 4). The force at fracture was measured in a universal testing machine, and the failure mode was recorded as repairable or nonrepairable. Results. ANOVA revealed a significant difference in fracture resistance between groups (P=0.001). The control group displayed significantly lower strength than that of the CAD-...
Avicenna Journal of Dental Research, Sep 29, 2023
The passivity of the fit may be at risk during the casting as well as the firing of the veneering... more The passivity of the fit may be at risk during the casting as well as the firing of the veneering ceramic. In this study, the comparison of the passivity between computer-aided design/computer-assisted manufacturing (CAD/CAM) implant frameworks and three different conventional techniques before and after applying veneering porcelain was investigated. Methods: In this laboratory cross-sectional study, four groups (n = 6) of 3-unit screw-retained implantsupported denture prostheses (ISDPs) were fabricated on a master model with 2 implants. The study groups were as follows: conventional casting with Ni-Cr alloy (group 1), casting with Ni-Cr alloy followed by sectioning and soldering the samples (group 2), double casting with Ni-Cr framework (group 3), and using CAD/CAM-fabricated framework (group 4). All frameworks received porcelain veneer. The one-screw test was performed before and after veneering to measure the vertical misfit at the abutment-framework interface using a stereomicroscope. The mean vertical misfit values were determined at the buccal, lingual, and proximal aspects. The data were analyzed using the Kruskal-Wallis and post hoc tests (α = 0.05). The accuracy of the fit varied significantly before and after veneering among the study groups (P < 0.001). Frameworks prepared with CAD/CAM showed lower mean marginal misfit values compared to the other fabrication methods (P < 0.001). Conclusions: Firing the veneering porcelain attached to a screw-retained ISDP may have an adverse effect on the accuracy of the fit. Soft non-pre-sintered CAD/CAM frameworks had better passivity compared to other three conventional methods applied.
International Journal of Contemporary Dental and Medical Reviews, Jul 18, 2015
The present article evaluates various clinical applications of cone-beam computed tomography (CBC... more The present article evaluates various clinical applications of cone-beam computed tomography (CBCT). Among scientifi c articles, research was conducted by PubMed on the dental application of CBCT, containing many articles, in general, among which most of them were clinically about dentistry and its related analyses. Diff erent functionalities of CBCT, including oral and maxillofacial surgery, root treatment, implantology, orthodontics, temporomandibular joint dysfunction, periodontics, and forensic dentistry have been indicated in the study. The aim of this review paper is to summarize the CBCT applications in various fi elds of dentistry. Also, this review article illustrates that diff erent CBCT indicators have been used concerning the need for the certain discipline of dentistry and the kind of conducted procedure.
International Journal of Prosthodontics, 2020
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2022
Background and Objective: Designing a tooth preparation method for endocrown construction is effe... more Background and Objective: Designing a tooth preparation method for endocrown construction is effective in achieving clinical success. Considering that our knowledge about pulp chamber preparation is insufficient, this study was conducted with the aim of comparing the fracture strength of upper molar and premolar teeth treated with endocrown-reconstructed root based on two different methods of pulp chamber preparation. Methods: In this laboratory study, 15 upper molars and 15 premolars were divided into three groups. The first group (5 healthy teeth) was considered as the control group. The teeth of the second and third groups of root treatment were mounted in an acrylic JIG and their crowns were cut 2 mm above the CEJ. In the second group, the undercut of the pulp chamber wall was eliminated by a dental lathe. In the third group, the undercut was blocked by resin-modified glass ionomer (RMGI) cement. The teeth of the second and third groups were scanned by a laboratory scanner and restored and cemented with lithium disilicate glass ceramic endocrown (EMAXCAD, Ivoclar Vivadent). Then, all the teeth were subjected to a fracture strength test by a universal testing machine with a crosshead speed of 1 mm/min. Findings: The fracture strength of premolar teeth of group two (883.160±186.6) and group three (880.380±262.6) showed no significant difference. The fracture strength of molar teeth of group two (960.120±444.4) and group three (1290.740±400.7) was not significantly different. The mean fracture strength of healthy molars (2194.400±375.4) was significantly higher than restored molars (p<0.05). In terms of fracture type (repairable/non-repairable), there was no significant difference between molar and premolar teeth in the studied groups. Conclusion: Based on the results of this study, two methods of eliminating the undercut or blocking out the pulp chamber with restorative materials can be used to make endocrowns in upper posterior teeth.
International Journal of Contemporary Dental and Medical Reviews, May 24, 2015
To enjoy from an effective and efficient oral health care and its required guidelines, a modern p... more To enjoy from an effective and efficient oral health care and its required guidelines, a modern population should have an in-depth understanding of the disease impact. Periodontitis is one the most significant causes of bone loss and its relationship with some systematic conditions has been approved. The aim of the present article was to evaluate extensively the effect of health status and oral abnormalities on life quality. Scant attention, however, has been paid to the periodontitis impact on life quality. The study is a summary of researches conducted on the effect of periodontitis on oral healthrelated quality of life (OHRQoL). Related studies were gathered after searches made in Medline and PubMed electronic databases. Then, topic, abstracts, and data extraction were investigated. Most related studies reported the negative effect of periodontitis on OHRQoL. However, the reported standards were not similar in various studies. Moreover, most studies were conducted in developed countries.
International Journal of Dentistry, Sep 22, 2022
Journal of Mashhad Dental School, 2021
Introduction: The high success rate of implant treatments has made it one of the most common trea... more Introduction: The high success rate of implant treatments has made it one of the most common treatments in dentistry. Nevertheless, we are witnessing an increase in the side effects of implant treatments, such as esthetic problems. The present study aimed to evaluate the aesthetic indices (e.g., pink esthetic score (PES) and White Esthetic Score (WES)in dental implants delivered in the Implant Departmentof Mashhad Dentistry School in 2017-2019. Materials and Methods: The present study was conducted on 20 Patients with single implant in the anterior region of the maxilla whoseprosthetic work was completed in 2017. After cementing the crown, the photographs and casts of patients were prepared and evaluated for aesthetic indicators. The PES index included papillary mesial, papaldistal, gingival margin arch, gingival margin surface, bony prominence of root and color area, as well assoft tissue texture. The WES index encompassed tooth shape, color and surface texture, as well as transluc...
International Journal of Contemporary Dental and Medical Reviews, 2015
The present article evaluates various clinical applications of cone-beam computed tomography (CBC... more The present article evaluates various clinical applications of cone-beam computed tomography (CBCT). Among scientific articles, research was conducted by PubMed on the dental application of CBCT, containing many articles, in general, among which most of them were clinically about dentistry and its related analyses. Different functionalities of CBCT, including oral and maxillofacial surgery, root treatment, implantology, orthodontics, temporomandibular joint dysfunction, periodontics, and forensic dentistry have been indicated in the study. The aim of this review paper is to summarize the CBCT applications in various fields of dentistry. Also, this review article illustrates that diff erent CBCT indicators have been used concerning the need for the certain discipline of dentistry and the kind of conducted procedure.
Journal of Dental Materials and Techniques, 2020
Introduction: Our goal is to demonstrate an appliance that can prevent post-burn microstomia. Per... more Introduction: Our goal is to demonstrate an appliance that can prevent post-burn microstomia. Perioral burns result in contracture of facial tissue during healing. It may cause limited oral access due to the sphincteral nature of orbicularis oris muscle. The literature has demonstrated that burn contractures and scar formation can be modified with pressure and splinting. Technique: The patient was a 50-year-old woman who had a 3rd degree burn. She had been treated with medicinal and palliative treatments, but due to burn scar that involved all her peri-oral tissues she had progressive microstomia. We fabricated microstomia prevention device for her in order to prevent further progression of microstomia. As the patient was completely edentulous, we decided to fabricate a tissue-supported appliance. Conclusion: This appliance is made with very simple equipment and is easy to fabricate.
International Journal of Contemporary Dental and Medical Reviews, 2015
To enjoy from an effective and efficient oral health care and its required guidelines, a modern p... more To enjoy from an effective and efficient oral health care and its required guidelines, a modern population should have an in-depth understanding of the disease impact. Periodontitis is one the most significant causes of bone loss and its relationship with some systematic conditions has been approved. The aim of the present article was to evaluate extensively the effect of health status and oral abnormalities on life quality. Scant attention, however, has been paid to the periodontitis impact on life quality. The study is a summary of researches conducted on the effect of periodontitis on oral health-related quality of life (OHRQoL). Related studies were gathered after searches made in Medline and PubMed electronic databases. Then, topic, abstracts, and data extraction were investigated. Most related studies reported the negative effect of periodontitis on OHRQoL. However, the reported standards were not similar in various studies. Moreover, most studies were conducted in developed c...
future of medical education journal, 2013
Background: When the lesson plan is performed correctly in the classroom, the value of this progr... more Background: When the lesson plan is performed correctly in the classroom, the value of this program and the time spent for it are exactly clarified. The aim of this study is to survey the coordination of theoretical lessons teaching for the students of dentistry in the ninth term in comparison with the lesson plans presented in 1388. Methods: A copy of all lesson plans offered in the ninth term,1388, with a compact disk of classroom teaching were given to ten sharp students who were active in class participation. According to what they learned in the classes and also listening to the CDs, they addressed the presence or absence of the topics presented in the lesson plans. The collected data were statistically described based on mean frequencies of addressed topics. Results:lesson plans of 5 courses ,from the 7 theoretical courses offered, were accessible .It was found that the coordination rate of lesson plans in comparison with the teachers’ presentation in the pediatrics course...
Journal of Advanced Oral Research, 2021
Aim: The aim of this study was to evaluate the effect of the ozonated water on corrosion of a cob... more Aim: The aim of this study was to evaluate the effect of the ozonated water on corrosion of a cobalt–chromium (Co-Cr)-based alloy, which is applied for the fabrication of metal frameworks of removable partial dentures. Materials and Methods: In this in vitro study, a total of 30 disk-shaped samples of a Co-Cr alloy were papered and randomly divided into two groups of 15 specimens. In group 1 (control), the specimens were stored in distilled water (DW), and in group 2, the specimens were stored in ozonated water. Around 90 immersions were performed, and the weight change of each specimen was determined. The ion release was analyzed using an inductively coupled plasma-optical emission spectrophotometer. The potentiodynamic polarization test was performed for each group to assess the corrosion resistance of the Co-Cr alloy. The statistical analysis was performed using SPSS version 22. Data were analyzed by independent samples’ t-test. Results: The results showed no significant differen...
The International Journal of Prosthodontics, 2020
Acta informatica medica : AIM : journal of the Society for Medical Informatics of Bosnia & Herzegovina : casopis Drustva za medicinsku informatiku BiH, 2017
Due to increasing demands for a full mouth implant reconstructions and the fact that the most fai... more Due to increasing demands for a full mouth implant reconstructions and the fact that the most failures are associated with biomechanical complications, determining the effect of different occlusal patterns on these complications seems inevitable. The aim of this study is to compare affection of different occlusal designs in full mouth implant reconstructed patients on electromyographic activity of temporal and masseter muscles compared to natural dentition. Thirty-two patients were included in this study, considering that 16 patients had natural dentition and the other 16 were full mouth implant reconstruction patients. In both groups, the participants were divided into two subgroups: 8 patients had canine guidance occlusal pattern and the other eight had a group function occlusal pattern. Muscle contractions were studied during both maximum intercuspation and lateral excursions to the point of intercanine contact using an electromyography device. The average percentages of masseter...
Journal of Dental and Allied Sciences, 2016
Background: Intrusive luxation is apical displacement of tooth into the alveolar bone due to bicy... more Background: Intrusive luxation is apical displacement of tooth into the alveolar bone due to bicycle accidents, sports accidents, falls, and fights. Intruded tooth is driven into the socket, compressing the periodontal ligament. Intrusion is considered as one of the most severe luxation injuries to affect permanent dentition. Intrusion injuries are often associated with severe damage to the tooth, periodontium, and pulpal tissue. The rare occurrence of this injury in the permanent dentition has resulted in limited studies to support suggested treatment regimens. Clinical treatment for intrusion is especially important because of the severe complications accompanying trauma. Case Report: This article reports traumatically intrusion of permanent maxillary central incisor which was followed by definite guidelines existed in management of traumatically Intruded permanent teeth. Also article is an overview of all available articles which are relevant with intrusion and provides all treatment modalities which are considered beneficial up today. Conclusion: Instant care and root canal treatment for intruded tooth can play a major role in correcting the tooth position and subsequently improving function and appearance. Therefore, clinician's knowledge and skills has a crucial role in managing intrusive luxation.
International Journal of Dentistry
Purpose. Restoration of endodontically treated premolars has always been considered as a challeng... more Purpose. Restoration of endodontically treated premolars has always been considered as a challenging procedure. This study compared the fracture strength and mode of failure of root canal treated premolars reconstructed with various post and core systems. Materials and Methods. Twenty healthy extracted premolars were selected and underwent root canal treatment and then randomly assigned into 4 groups (n = 5). The teeth in group 1 restored with amalgam, whereas others reconstructed with post and cores made by cobalt-chromium (Co-Cr) casting (group 2), nonprecious gold (NPG) casting (group 3), or computer-aided design (CAD) and computer-aided manufacturing (CAM) milling (group 4). The force at fracture was measured in a universal testing machine, and the failure mode was recorded as repairable or nonrepairable. Results. ANOVA revealed a significant difference in fracture resistance between groups (P=0.001). The control group displayed significantly lower strength than that of the CAD-...