Qasem Alomari | Kuwait University - Health Sciences Center (original) (raw)
Papers by Qasem Alomari
Operative Dentistry
ABSTRACT
Operative Dentistry
This in vitro study measured cusp deflection associated with MOD resin composite restorations in ... more This in vitro study measured cusp deflection associated with MOD resin composite restorations in maxillary premolars with different curing light modes. Soft-start polymerization may reduce cusp deflection by reducing polymerization shrinkage stress. Forty maxillary premolars were mounted in stone and slot MOD cavities were prepared. The teeth were randomized into four groups: Group A--cavities were etched, bonded and restored with two increments of Z-100 composite. Each increment was cured with an LED curing light (fast curing mode). Group B--similar to Group A except that the LED curing light with pulse curing mode was used. Group C--similar to Group A except that the LED curing light with stepped curing mode was used. Group D--a visible curing light was used for curing the composite. The distance between the indexed cusp tips was measured before the restorations were completed and five minutes after, 24 hours after and two weeks after completion of the restorations. The mean contraction of the cusps in microm at five minutes, 24 hours and two weeks, respectively, for each group was A: 25.4, 16.2 and 8.2, B: 6.4, 3.4 and 2.2, C: 11.6, 7.0 and 4.4, D: 33.0, 21.6 and 15.8. Group D resulted in the highest deflection, Group A was intermediate and Groups B and C were the lowest. Ten samples of the composite for each group with 2-mm thickness were prepared for the Vickers hardness test. No difference among the samples was found.
The European journal of prosthodontics and restorative dentistry
This study investigated the stress distribution patterns of two finite element models of a styliz... more This study investigated the stress distribution patterns of two finite element models of a stylized fixed dental prosthesis-cement-abutment tooth system, one with the prosthesis completely seated and the other manipulated to be incompletely seated. Maximum equivalent von Mises stress varied according to direction and location of load, with vertical loading of the pontic of the completely-seated FDP (2.9 MPa) and oblique loading of the premolar of the incompletely-seated FDP (80.8 MPa) producing the least and the highest values, respectively. Total deformation of the restored system showed variations, although different cements had minimal effect on stress and on deformation. Under the conditions studied, a fixed dental prosthesis that had not been verified as fully seated on its abutments prior to cementation, could, with repeated loading cycles, be predicted to suffer a greater risk of fatigue, and thus clinical failure.
The journal of contemporary dental practice, 2010
The study aimed to evaluate the effect of four in-office dental bleaching methods on shade change... more The study aimed to evaluate the effect of four in-office dental bleaching methods on shade change, color stability, patient satisfaction and postoperative sensitivity. Forty patients were randomly divided into four groups (n=10) according to the method of in-office bleaching used: Group A-35% hydrogen peroxide (HP); Group B-35% HP plus BriteSmile and a blue curing light; Group C-35% HP plus QuickSmile and an LED curing light; Group D-35% HP and a Zoom2 metal halide curing light. For all groups, there was only one session of bleaching with three 20-minute applications of bleaching gel. The shade was evaluated before bleaching, immediately after, and one month after treatment using a VITA Classical Shade Guide. Immediately after bleaching there was a significant difference in color change between the four groups, with Group B having the best results. At one month there was no difference between the four groups. Immediate postoperative sensitivity was the least in Group A and the highe...
European journal of dentistry, 2010
To compare re-treatment choices for MOD amalgam or resin composite restorations with or without c... more To compare re-treatment choices for MOD amalgam or resin composite restorations with or without cusp fracture among dentists in Kuwait. A random sample of 158 dentists completed a questionnaire designed to obtain socio-demographic, educational and work-related information and their choices for re-treatment of four scenarios of failed restorations on lower first molars: 1. MOD amalgam restoration; 2. MOD composite restoration; 3. MOD amalgam restoration with cuspal fracture; 4. MOD composite restoration with cuspal fracture. Re-treatment options were: re-treating with amalgam; re-treating with composite; placing an onlay; or, placing a crown. For the purpose of analysis, responses were dichotomized into re-treatment with a direct or indirect restoration. For cases 1 and 2, most participants chose to re-treat with amalgam restoration and for cases 3 and 4, most chose to place an indirect restoration. In general, an increased tendency towards the indirect option was associated with inc...
Journal of the Irish Dental Association
Postoperative sensitivity is a common clinical problem with restorative treatments. To identify f... more Postoperative sensitivity is a common clinical problem with restorative treatments. To identify factors that may be predictive of reported postoperative sensitivity to cold following placement of class I and II amalgam restorations in primary carious lesions. One hundred and twenty patients were recruited. Patients were telephoned on days two and seven postoperatively and asked about sensitivity to cold and its intensity. If sensitivity remained up to day seven, patients were also contacted on days 30 and 90. Of the 51 teeth that had sensitivity at day two, 17 experienced mild pain, 26 were moderately painful and eight had severe pain. The percentage of females experiencing postoperative sensitivity was higher than that of males at days two, seven and 30 (P=0.000, 0.016 and 0.028, respectively). Younger patients reported significantly more postoperative sensitivity than older ones at day two (P=0.010) but not at days seven and 30 (P=0.157 and 0.877). Postoperative sensitivity did no...
The journal of adhesive dentistry, 2007
The aim of this study was to compare postoperative sensitivity following placement of posterior c... more The aim of this study was to compare postoperative sensitivity following placement of posterior composite restorations using the fast- or step-curing modes of an LED curing light. Thirty patients participated, with each having two homologous contralateral posterior teeth with Class II carious lesions. One restoration was cured using the fast-curing mode of the LED curing light (Mini LED), and the contralateral restoration cured using the step mode of the same curing light. The patients were contacted after 2 and 7 days postoperatively and asked about the presence or absence of sensitivity on a scale from 0 to 3.0: no sensitivity, 1: slight sensitivity, 2: moderate sensitivity, and 3: severe sensitivity. If the patient experienced sensitivity at 7 days postoperatively, he/she was contacted again after 30 and 90 days. There was a statistically significant difference in postoperative sensitivity between the two curing modes at days 2 and 7 postoperatively (p < 0.05) but not at days ...
SADJ : journal of the South African Dental Association = tydskrif van die Suid-Afrikaanse Tandheelkundige Vereniging, 2007
Polymerization shrinkage (PS) of resin composites almost invariably generates a degree of stress ... more Polymerization shrinkage (PS) of resin composites almost invariably generates a degree of stress at the tooth/restoration interface. The magnitude of the stresses so produced depends on resin composite composition and its ability to flow before solidification, which is, in turn related to cavity configuration and curing characteristics of the composite. The purpose of the present article is to review the published literature on the management of PS, with special reference to those elements that are under the control of the dentist. Available data from laboratory, finite element analysis and review articles, relating to the methods and techniques that have been proposed for managing the problem of PS, are included. On the basis of the review, it may be concluded that PS has negative effects on the resin composite/tooth interface. The review identifies the preferred handling and/or management techniques that clinicians might employ to reduce the levels of PS that might affect the rest...
Operative Dentistry, 2005
This in vitro study measured cusp deflection associated with MOD resin composite restorations in ... more This in vitro study measured cusp deflection associated with MOD resin composite restorations in maxillary premolars with different curing light modes. Soft-start polymerization may reduce cusp deflection by reducing polymerization shrinkage stress. Forty maxillary premolars were mounted in stone and slot MOD cavities were prepared. The teeth were randomized into four groups: Group A--cavities were etched, bonded and restored with two increments of Z-100 composite. Each increment was cured with an LED curing light (fast curing mode). Group B--similar to Group A except that the LED curing light with pulse curing mode was used. Group C--similar to Group A except that the LED curing light with stepped curing mode was used. Group D--a visible curing light was used for curing the composite. The distance between the indexed cusp tips was measured before the restorations were completed and five minutes after, 24 hours after and two weeks after completion of the restorations. The mean contraction of the cusps in microm at five minutes, 24 hours and two weeks, respectively, for each group was A: 25.4, 16.2 and 8.2, B: 6.4, 3.4 and 2.2, C: 11.6, 7.0 and 4.4, D: 33.0, 21.6 and 15.8. Group D resulted in the highest deflection, Group A was intermediate and Groups B and C were the lowest. Ten samples of the composite for each group with 2-mm thickness were prepared for the Vickers hardness test. No difference among the samples was found.
Oral Radiology, 2014
ABSTRACT Objectives To compare conventional radiographs, digital radiographs, equalized images of... more ABSTRACT Objectives To compare conventional radiographs, digital radiographs, equalized images of digital radiographs, and cone-beam computed tomography (CBCT) images for in vitro imaging of occlusal dentine caries. Methods A total of 160 extracted human posterior teeth were evaluated in the study. All teeth were free of restorations and proximal caries. The clinical appearances of the occlusal surfaces of the teeth ranged from sound to discolored, with no macroscopic cavitation. Conventional intraoral radiographs, digital intraoral radiographs, and CBCT images of the teeth were taken. The images were evaluated independently by three observers for the presence of occlusal dentine caries. The teeth were then sectioned and computerized images were obtained for the histological sections using a digital camera linked to a stereomicroscope at 10× magnification. The histological images were assessed for the presence or absence of dentinal caries. The sensitivity, specificity, accuracy, and area under the receiver-operating characteristic curve (Az value) were calculated for each diagnostic method. Results Sensitivity was greatest for CBCT images (mean = 0.63) and lowest for digital radiographs (mean = 0.38). Specificity was greatest for digital radiographs (mean = 0.76) and lowest for CBCT images (mean = 0.64). The mean Az values ranged from 0.56 to 0.60 (P > 0.05). The interobserver and intraobserver agreements were greatest for CBCT images (mean kappa = 0.66 and 0.73, respectively). Conclusions There were no differences in the accuracy of detection of non-cavitated occlusal dentine caries among the diagnostic modalities used. Cone-beam computed tomography images were more sensitive, while digital radiographs were more specific.
European journal of dentistry, 2011
To investigate the effects of cavity C-factor and LED curing mode on microleakage of class V resi... more To investigate the effects of cavity C-factor and LED curing mode on microleakage of class V resin composite restorations. Eighty extracted human maxillary premolars were divided into four groups. In groups I and II, V-shaped class V cavities (C-factor ≈ 1.5) were prepared while box-shaped class V cavities (high C-factor ≈ 4) were prepared in groups III and IV. All the cavities were prepared on the vestibular surfaces of the teeth. All the cavities were prepared by one operator with specific dimensions. The same adhesive system (Excite) and the same restorative composite (Tetric Ceram) were used in all the groups. The restorations in groups I and III were cured with the fast curing mode of LED curing light, while the restorations in groups II and IV were cured with the soft-start mode of the same curing light. The samples were thermocycled, immersed in a 0.5% basic fuchsin solution for 24 hours, and sectioned. The degree of dye penetration was measured quantitatively and then qualit...
Operative Dentistry, 2006
This clinical study assessed the postoperative cold sensitivity reported by patients following th... more This clinical study assessed the postoperative cold sensitivity reported by patients following the Class I and Class II amalgam restoration of primary carious lesions after different cavity treatments. One hundred and twenty patients, each with a previously untreated tooth requiring an amalgam restoration due to the presence of a carious lesion, were included. Sixty teeth had lesions that were radiographically judged to be located in the middle third of dentin, and another 60 were located in the inner third of dentin. Six different cavity treatment regimens were used: Group 1-no treatment; Group 2-calcium hydroxide liner (Life); Group 3-cavity varnish (Copalite); Group 4-resin modified glass ionomer liner (Vitrebond); Group 5-dentin adhesive resin liner (Single Bond); Group 6chlorhexidine disinfectant (Consepsis). Patients were telephoned on days 2 and 7 postoperatively and asked whether they experienced sensitivity to cold, and if so, its duration and intensity. If sensitivity remained up to day 7, patients were also contacted on days 30 and 90. The Kruskal-Wallis test showed postoperative sensitivity to be significantly different among cavity treatments at days 2, 7 and 30 (p=0.026, 0.044, 0.015, respectively). Lesion depth also affected postoperative sensitivity at day 2, with 27% of teeth with middle-third lesions producing pain, and 58% of those with lesions extending to the inner third producing pain (p=0.000). This difference showed up at 7 and 30 days (p=0.001, 0.015, respectively). Of the 51 teeth with sensitivity at day 2, 17 had mild pain, 26 were moderately painful and 8 had severe pain; each category reduced in degree of sensitivity and number with time. It would seem that medium-term (beyond 30 days) postoperative sensitivity is affected neither by the method of cavity treatment nor the depth of lesion, Using a cavity disinfectant such as chlorhexidine before placing an amalgam restoration decreases postoperative sensitivity to cold stimulus.
Operative Dentistry, 2011
Journal of Oral Rehabilitation, 2013
Teeth can be extracted due to multiple factors. The aim of this retrospective cross-sectional stu... more Teeth can be extracted due to multiple factors. The aim of this retrospective cross-sectional study was to identify the relative contribution of restorative treatments to tooth loss. The study reviewed records of 826 patients (1102 teeth). Patient's gender, age and education were obtained. In addition to the main reason for extraction (caries, periodontal disease, pre-prosthetic extraction, restorative failure and remaining root), the following information was collected about each extracted tooth: type, the status of caries if any (primary or secondary) and pulpal status (normal or reversible pulpitis, irreversible pulpitis, necrotic or root canal treated) and type and size of restoration, if present. Following data collection, descriptive analysis was performed. A log-linear model was used to examine the association between restorative treatment and tooth loss and between reasons for tooth loss and type of tooth. Lower molars followed by upper molars were the most commonly extracted teeth. Teeth with no restorations or with crowns were less likely to be extracted (P < 0·001). Lower and upper molars and lower premolars were more likely to be extracted due to restorative failure, while lower anterior teeth were more likely to be extracted due to periodontal disease (P < 0·05). Twenty two per cent of the extractions was due to restorative failure, and at least 65·9% of these teeth had secondary caries. Gender, age and educational level were factors that affect tooth loss. In conclusion, teeth receiving multiple restorative therapies were more likely to be extracted.
Journal of Dentistry, 2014
j o u r n a l o f d e n t i s t r y 4 2 ( 2 0 1 4 ) 7 8 5 -7 9 2 Composite Restoration Dentist Pa... more j o u r n a l o f d e n t i s t r y 4 2 ( 2 0 1 4 ) 7 8 5 -7 9 2 Composite Restoration Dentist Patient Cavity a b s t r a c t Objectives: This study prospectively analyzed the use of amalgam and resin composite posterior restorations placed by general dentists in relation to dentist, patient and cavity factors. Methods: One thousand posterior restorations placed by a representative sample of general dentists working in the Ministry of Health (MOH), Kuwait, during routine clinical practice were included. Information about the restorations was recorded using a survey questionnaire. Descriptive statistics and multivariate logistic regression analysis were used to determine the factors associated with the use of amalgam versus tooth coloured restoratives. Results: Dentists chose amalgam for 30.8% of the 1000 restorations. Dentists with longer work experience (>15 years) were more likely to choose amalgam (OR = 2.61, 95% CI = 1.06, 6.40). Younger dentists ( 30 years) were less likely to choose amalgam (OR = 0. 45, 95% CI = 0.26, 0.77). Amalgam was more likely to be chosen for patients with poor oral hygiene (OR = 1.58, 95% CI = 1.08, 2.32) and a higher number (!4) of restorations (OR = 1.44, 95% CI = 1.07, 1.94) with large cavity sizes (OR = 6.33, 95% CI = 3.88, 10.32). Tooth-coloured restorations were more likely to be chosen for cavities of smaller sizes. Conclusions: The use of resin composite materials as the dominant choice among dentists in Kuwait reflects the trend worldwide. Nevertheless, clinicians still find a use for amalgam in posterior load-bearing teeth and in the high-caries risk population. Clinical significance: The findings give insight into factors influencing material usage under different clinical conditions and provides information about the perceived deficiencies or shortcomings of resin composite materials in a general dental practice setting. This information can be useful for identifying perceived barriers to the usage of newer restorative materials and finding ways to overcome them.
International Endodontic Journal, 2004
Hamasha AA, Alomari QD. Prevalence of dens invaginatus in Jordanian adults. International Endodon... more Hamasha AA, Alomari QD. Prevalence of dens invaginatus in Jordanian adults. International Endodontic Journal, 37, 307^310,
International Endodontic Journal, 2011
Alomari QD, Barrieshi KM, Al-Awadhi SA. Effect of post length and diameter on remaining dentine t... more Alomari QD, Barrieshi KM, Al-Awadhi SA. Effect of post length and diameter on remaining dentine thickness in maxillary central and lateral incisors. International Endodontic Journal, 44, 956-966, 2011.
Medical Principles and Practice
Objectives: This study investigated the thresholds at which general dentists in Kuwait would rest... more Objectives: This study investigated the thresholds at which general dentists in Kuwait would restore approximal and occlusal carious lesions and examined the demographic characteristics of the dentists in relation to their decision making. Subjects and Methods: The study population consisted of a random sample of 185 general dentists practicing in the Ministry of Health of Kuwait. A survey questionnaire was administered. The questionnaire presented different stages and locations of carious lesions; the participants were asked to identify the stage at which a restoration is required under different conditions, the preparation technique, and their choice of restorative material. Results: For approximal carious lesions, 74 (40%) of the participants reported that they would restoratively intervene when the carious lesion reached the outer third of the dentin. A total of 91 (49.2%) reported the use of traditional class II restorations. For occlusal carious lesions, 128 (69.2%) said they ...
Operative Dentistry
ABSTRACT
Operative Dentistry
This in vitro study measured cusp deflection associated with MOD resin composite restorations in ... more This in vitro study measured cusp deflection associated with MOD resin composite restorations in maxillary premolars with different curing light modes. Soft-start polymerization may reduce cusp deflection by reducing polymerization shrinkage stress. Forty maxillary premolars were mounted in stone and slot MOD cavities were prepared. The teeth were randomized into four groups: Group A--cavities were etched, bonded and restored with two increments of Z-100 composite. Each increment was cured with an LED curing light (fast curing mode). Group B--similar to Group A except that the LED curing light with pulse curing mode was used. Group C--similar to Group A except that the LED curing light with stepped curing mode was used. Group D--a visible curing light was used for curing the composite. The distance between the indexed cusp tips was measured before the restorations were completed and five minutes after, 24 hours after and two weeks after completion of the restorations. The mean contraction of the cusps in microm at five minutes, 24 hours and two weeks, respectively, for each group was A: 25.4, 16.2 and 8.2, B: 6.4, 3.4 and 2.2, C: 11.6, 7.0 and 4.4, D: 33.0, 21.6 and 15.8. Group D resulted in the highest deflection, Group A was intermediate and Groups B and C were the lowest. Ten samples of the composite for each group with 2-mm thickness were prepared for the Vickers hardness test. No difference among the samples was found.
The European journal of prosthodontics and restorative dentistry
This study investigated the stress distribution patterns of two finite element models of a styliz... more This study investigated the stress distribution patterns of two finite element models of a stylized fixed dental prosthesis-cement-abutment tooth system, one with the prosthesis completely seated and the other manipulated to be incompletely seated. Maximum equivalent von Mises stress varied according to direction and location of load, with vertical loading of the pontic of the completely-seated FDP (2.9 MPa) and oblique loading of the premolar of the incompletely-seated FDP (80.8 MPa) producing the least and the highest values, respectively. Total deformation of the restored system showed variations, although different cements had minimal effect on stress and on deformation. Under the conditions studied, a fixed dental prosthesis that had not been verified as fully seated on its abutments prior to cementation, could, with repeated loading cycles, be predicted to suffer a greater risk of fatigue, and thus clinical failure.
The journal of contemporary dental practice, 2010
The study aimed to evaluate the effect of four in-office dental bleaching methods on shade change... more The study aimed to evaluate the effect of four in-office dental bleaching methods on shade change, color stability, patient satisfaction and postoperative sensitivity. Forty patients were randomly divided into four groups (n=10) according to the method of in-office bleaching used: Group A-35% hydrogen peroxide (HP); Group B-35% HP plus BriteSmile and a blue curing light; Group C-35% HP plus QuickSmile and an LED curing light; Group D-35% HP and a Zoom2 metal halide curing light. For all groups, there was only one session of bleaching with three 20-minute applications of bleaching gel. The shade was evaluated before bleaching, immediately after, and one month after treatment using a VITA Classical Shade Guide. Immediately after bleaching there was a significant difference in color change between the four groups, with Group B having the best results. At one month there was no difference between the four groups. Immediate postoperative sensitivity was the least in Group A and the highe...
European journal of dentistry, 2010
To compare re-treatment choices for MOD amalgam or resin composite restorations with or without c... more To compare re-treatment choices for MOD amalgam or resin composite restorations with or without cusp fracture among dentists in Kuwait. A random sample of 158 dentists completed a questionnaire designed to obtain socio-demographic, educational and work-related information and their choices for re-treatment of four scenarios of failed restorations on lower first molars: 1. MOD amalgam restoration; 2. MOD composite restoration; 3. MOD amalgam restoration with cuspal fracture; 4. MOD composite restoration with cuspal fracture. Re-treatment options were: re-treating with amalgam; re-treating with composite; placing an onlay; or, placing a crown. For the purpose of analysis, responses were dichotomized into re-treatment with a direct or indirect restoration. For cases 1 and 2, most participants chose to re-treat with amalgam restoration and for cases 3 and 4, most chose to place an indirect restoration. In general, an increased tendency towards the indirect option was associated with inc...
Journal of the Irish Dental Association
Postoperative sensitivity is a common clinical problem with restorative treatments. To identify f... more Postoperative sensitivity is a common clinical problem with restorative treatments. To identify factors that may be predictive of reported postoperative sensitivity to cold following placement of class I and II amalgam restorations in primary carious lesions. One hundred and twenty patients were recruited. Patients were telephoned on days two and seven postoperatively and asked about sensitivity to cold and its intensity. If sensitivity remained up to day seven, patients were also contacted on days 30 and 90. Of the 51 teeth that had sensitivity at day two, 17 experienced mild pain, 26 were moderately painful and eight had severe pain. The percentage of females experiencing postoperative sensitivity was higher than that of males at days two, seven and 30 (P=0.000, 0.016 and 0.028, respectively). Younger patients reported significantly more postoperative sensitivity than older ones at day two (P=0.010) but not at days seven and 30 (P=0.157 and 0.877). Postoperative sensitivity did no...
The journal of adhesive dentistry, 2007
The aim of this study was to compare postoperative sensitivity following placement of posterior c... more The aim of this study was to compare postoperative sensitivity following placement of posterior composite restorations using the fast- or step-curing modes of an LED curing light. Thirty patients participated, with each having two homologous contralateral posterior teeth with Class II carious lesions. One restoration was cured using the fast-curing mode of the LED curing light (Mini LED), and the contralateral restoration cured using the step mode of the same curing light. The patients were contacted after 2 and 7 days postoperatively and asked about the presence or absence of sensitivity on a scale from 0 to 3.0: no sensitivity, 1: slight sensitivity, 2: moderate sensitivity, and 3: severe sensitivity. If the patient experienced sensitivity at 7 days postoperatively, he/she was contacted again after 30 and 90 days. There was a statistically significant difference in postoperative sensitivity between the two curing modes at days 2 and 7 postoperatively (p < 0.05) but not at days ...
SADJ : journal of the South African Dental Association = tydskrif van die Suid-Afrikaanse Tandheelkundige Vereniging, 2007
Polymerization shrinkage (PS) of resin composites almost invariably generates a degree of stress ... more Polymerization shrinkage (PS) of resin composites almost invariably generates a degree of stress at the tooth/restoration interface. The magnitude of the stresses so produced depends on resin composite composition and its ability to flow before solidification, which is, in turn related to cavity configuration and curing characteristics of the composite. The purpose of the present article is to review the published literature on the management of PS, with special reference to those elements that are under the control of the dentist. Available data from laboratory, finite element analysis and review articles, relating to the methods and techniques that have been proposed for managing the problem of PS, are included. On the basis of the review, it may be concluded that PS has negative effects on the resin composite/tooth interface. The review identifies the preferred handling and/or management techniques that clinicians might employ to reduce the levels of PS that might affect the rest...
Operative Dentistry, 2005
This in vitro study measured cusp deflection associated with MOD resin composite restorations in ... more This in vitro study measured cusp deflection associated with MOD resin composite restorations in maxillary premolars with different curing light modes. Soft-start polymerization may reduce cusp deflection by reducing polymerization shrinkage stress. Forty maxillary premolars were mounted in stone and slot MOD cavities were prepared. The teeth were randomized into four groups: Group A--cavities were etched, bonded and restored with two increments of Z-100 composite. Each increment was cured with an LED curing light (fast curing mode). Group B--similar to Group A except that the LED curing light with pulse curing mode was used. Group C--similar to Group A except that the LED curing light with stepped curing mode was used. Group D--a visible curing light was used for curing the composite. The distance between the indexed cusp tips was measured before the restorations were completed and five minutes after, 24 hours after and two weeks after completion of the restorations. The mean contraction of the cusps in microm at five minutes, 24 hours and two weeks, respectively, for each group was A: 25.4, 16.2 and 8.2, B: 6.4, 3.4 and 2.2, C: 11.6, 7.0 and 4.4, D: 33.0, 21.6 and 15.8. Group D resulted in the highest deflection, Group A was intermediate and Groups B and C were the lowest. Ten samples of the composite for each group with 2-mm thickness were prepared for the Vickers hardness test. No difference among the samples was found.
Oral Radiology, 2014
ABSTRACT Objectives To compare conventional radiographs, digital radiographs, equalized images of... more ABSTRACT Objectives To compare conventional radiographs, digital radiographs, equalized images of digital radiographs, and cone-beam computed tomography (CBCT) images for in vitro imaging of occlusal dentine caries. Methods A total of 160 extracted human posterior teeth were evaluated in the study. All teeth were free of restorations and proximal caries. The clinical appearances of the occlusal surfaces of the teeth ranged from sound to discolored, with no macroscopic cavitation. Conventional intraoral radiographs, digital intraoral radiographs, and CBCT images of the teeth were taken. The images were evaluated independently by three observers for the presence of occlusal dentine caries. The teeth were then sectioned and computerized images were obtained for the histological sections using a digital camera linked to a stereomicroscope at 10× magnification. The histological images were assessed for the presence or absence of dentinal caries. The sensitivity, specificity, accuracy, and area under the receiver-operating characteristic curve (Az value) were calculated for each diagnostic method. Results Sensitivity was greatest for CBCT images (mean = 0.63) and lowest for digital radiographs (mean = 0.38). Specificity was greatest for digital radiographs (mean = 0.76) and lowest for CBCT images (mean = 0.64). The mean Az values ranged from 0.56 to 0.60 (P > 0.05). The interobserver and intraobserver agreements were greatest for CBCT images (mean kappa = 0.66 and 0.73, respectively). Conclusions There were no differences in the accuracy of detection of non-cavitated occlusal dentine caries among the diagnostic modalities used. Cone-beam computed tomography images were more sensitive, while digital radiographs were more specific.
European journal of dentistry, 2011
To investigate the effects of cavity C-factor and LED curing mode on microleakage of class V resi... more To investigate the effects of cavity C-factor and LED curing mode on microleakage of class V resin composite restorations. Eighty extracted human maxillary premolars were divided into four groups. In groups I and II, V-shaped class V cavities (C-factor ≈ 1.5) were prepared while box-shaped class V cavities (high C-factor ≈ 4) were prepared in groups III and IV. All the cavities were prepared on the vestibular surfaces of the teeth. All the cavities were prepared by one operator with specific dimensions. The same adhesive system (Excite) and the same restorative composite (Tetric Ceram) were used in all the groups. The restorations in groups I and III were cured with the fast curing mode of LED curing light, while the restorations in groups II and IV were cured with the soft-start mode of the same curing light. The samples were thermocycled, immersed in a 0.5% basic fuchsin solution for 24 hours, and sectioned. The degree of dye penetration was measured quantitatively and then qualit...
Operative Dentistry, 2006
This clinical study assessed the postoperative cold sensitivity reported by patients following th... more This clinical study assessed the postoperative cold sensitivity reported by patients following the Class I and Class II amalgam restoration of primary carious lesions after different cavity treatments. One hundred and twenty patients, each with a previously untreated tooth requiring an amalgam restoration due to the presence of a carious lesion, were included. Sixty teeth had lesions that were radiographically judged to be located in the middle third of dentin, and another 60 were located in the inner third of dentin. Six different cavity treatment regimens were used: Group 1-no treatment; Group 2-calcium hydroxide liner (Life); Group 3-cavity varnish (Copalite); Group 4-resin modified glass ionomer liner (Vitrebond); Group 5-dentin adhesive resin liner (Single Bond); Group 6chlorhexidine disinfectant (Consepsis). Patients were telephoned on days 2 and 7 postoperatively and asked whether they experienced sensitivity to cold, and if so, its duration and intensity. If sensitivity remained up to day 7, patients were also contacted on days 30 and 90. The Kruskal-Wallis test showed postoperative sensitivity to be significantly different among cavity treatments at days 2, 7 and 30 (p=0.026, 0.044, 0.015, respectively). Lesion depth also affected postoperative sensitivity at day 2, with 27% of teeth with middle-third lesions producing pain, and 58% of those with lesions extending to the inner third producing pain (p=0.000). This difference showed up at 7 and 30 days (p=0.001, 0.015, respectively). Of the 51 teeth with sensitivity at day 2, 17 had mild pain, 26 were moderately painful and 8 had severe pain; each category reduced in degree of sensitivity and number with time. It would seem that medium-term (beyond 30 days) postoperative sensitivity is affected neither by the method of cavity treatment nor the depth of lesion, Using a cavity disinfectant such as chlorhexidine before placing an amalgam restoration decreases postoperative sensitivity to cold stimulus.
Operative Dentistry, 2011
Journal of Oral Rehabilitation, 2013
Teeth can be extracted due to multiple factors. The aim of this retrospective cross-sectional stu... more Teeth can be extracted due to multiple factors. The aim of this retrospective cross-sectional study was to identify the relative contribution of restorative treatments to tooth loss. The study reviewed records of 826 patients (1102 teeth). Patient's gender, age and education were obtained. In addition to the main reason for extraction (caries, periodontal disease, pre-prosthetic extraction, restorative failure and remaining root), the following information was collected about each extracted tooth: type, the status of caries if any (primary or secondary) and pulpal status (normal or reversible pulpitis, irreversible pulpitis, necrotic or root canal treated) and type and size of restoration, if present. Following data collection, descriptive analysis was performed. A log-linear model was used to examine the association between restorative treatment and tooth loss and between reasons for tooth loss and type of tooth. Lower molars followed by upper molars were the most commonly extracted teeth. Teeth with no restorations or with crowns were less likely to be extracted (P < 0·001). Lower and upper molars and lower premolars were more likely to be extracted due to restorative failure, while lower anterior teeth were more likely to be extracted due to periodontal disease (P < 0·05). Twenty two per cent of the extractions was due to restorative failure, and at least 65·9% of these teeth had secondary caries. Gender, age and educational level were factors that affect tooth loss. In conclusion, teeth receiving multiple restorative therapies were more likely to be extracted.
Journal of Dentistry, 2014
j o u r n a l o f d e n t i s t r y 4 2 ( 2 0 1 4 ) 7 8 5 -7 9 2 Composite Restoration Dentist Pa... more j o u r n a l o f d e n t i s t r y 4 2 ( 2 0 1 4 ) 7 8 5 -7 9 2 Composite Restoration Dentist Patient Cavity a b s t r a c t Objectives: This study prospectively analyzed the use of amalgam and resin composite posterior restorations placed by general dentists in relation to dentist, patient and cavity factors. Methods: One thousand posterior restorations placed by a representative sample of general dentists working in the Ministry of Health (MOH), Kuwait, during routine clinical practice were included. Information about the restorations was recorded using a survey questionnaire. Descriptive statistics and multivariate logistic regression analysis were used to determine the factors associated with the use of amalgam versus tooth coloured restoratives. Results: Dentists chose amalgam for 30.8% of the 1000 restorations. Dentists with longer work experience (>15 years) were more likely to choose amalgam (OR = 2.61, 95% CI = 1.06, 6.40). Younger dentists ( 30 years) were less likely to choose amalgam (OR = 0. 45, 95% CI = 0.26, 0.77). Amalgam was more likely to be chosen for patients with poor oral hygiene (OR = 1.58, 95% CI = 1.08, 2.32) and a higher number (!4) of restorations (OR = 1.44, 95% CI = 1.07, 1.94) with large cavity sizes (OR = 6.33, 95% CI = 3.88, 10.32). Tooth-coloured restorations were more likely to be chosen for cavities of smaller sizes. Conclusions: The use of resin composite materials as the dominant choice among dentists in Kuwait reflects the trend worldwide. Nevertheless, clinicians still find a use for amalgam in posterior load-bearing teeth and in the high-caries risk population. Clinical significance: The findings give insight into factors influencing material usage under different clinical conditions and provides information about the perceived deficiencies or shortcomings of resin composite materials in a general dental practice setting. This information can be useful for identifying perceived barriers to the usage of newer restorative materials and finding ways to overcome them.
International Endodontic Journal, 2004
Hamasha AA, Alomari QD. Prevalence of dens invaginatus in Jordanian adults. International Endodon... more Hamasha AA, Alomari QD. Prevalence of dens invaginatus in Jordanian adults. International Endodontic Journal, 37, 307^310,
International Endodontic Journal, 2011
Alomari QD, Barrieshi KM, Al-Awadhi SA. Effect of post length and diameter on remaining dentine t... more Alomari QD, Barrieshi KM, Al-Awadhi SA. Effect of post length and diameter on remaining dentine thickness in maxillary central and lateral incisors. International Endodontic Journal, 44, 956-966, 2011.
Medical Principles and Practice
Objectives: This study investigated the thresholds at which general dentists in Kuwait would rest... more Objectives: This study investigated the thresholds at which general dentists in Kuwait would restore approximal and occlusal carious lesions and examined the demographic characteristics of the dentists in relation to their decision making. Subjects and Methods: The study population consisted of a random sample of 185 general dentists practicing in the Ministry of Health of Kuwait. A survey questionnaire was administered. The questionnaire presented different stages and locations of carious lesions; the participants were asked to identify the stage at which a restoration is required under different conditions, the preparation technique, and their choice of restorative material. Results: For approximal carious lesions, 74 (40%) of the participants reported that they would restoratively intervene when the carious lesion reached the outer third of the dentin. A total of 91 (49.2%) reported the use of traditional class II restorations. For occlusal carious lesions, 128 (69.2%) said they ...