Cranio : the journal of craniomandibular practice, 2005
The aim of the present study was to investigate the relationship between noncarious cervical lesi... more The aim of the present study was to investigate the relationship between noncarious cervical lesions (NCCL) and dental premature contacts (PC). Following examination of 1,974 teeth from 77 patients referred to the Department of Oral Medicine, Faculty of Dentistry, Mashad University of Medical Science, Iran, a total of 167 teeth were identified to have the criteria set for noncarious cervical lesions (regarded as NCCL group). Also, 167 teeth exhibiting no such lesions were selected randomly from the same population (regarded as control group). The results indicated that within the NCCL group, the frequency of noncarious cervical lesions differed significantly among the various teeth; the first premolar teeth showed the greatest number of cervical lesions, followed by the canine teeth, and the second molar teeth had the least number of lesions. A similar trend was detected in the total number of premature contacts among the seven types of teeth. The results revealed a highly significa...
This study was performed to compare the condylar position in patients with temporomandibular join... more This study was performed to compare the condylar position in patients with temporomandibular joint disorders (TMDs) and a normal group by using cone-beam computed tomography (CBCT). In the TMD group, 25 patients (5 men and 20 women) were randomly selected among the ones suffering from TMD according to the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). The control group consisted of 25 patients (8 men and 17 women) with normal temporomandibular joints (TMJs) who were referred to the radiology department in order to undergo CBCT scanning for implant treatment in the posterior maxilla. Linear measurements from the superior, anterior, and posterior joint spaces between the condyle and glenoid fossa were made through defined landmarks in the sagittal view. The inclination of articular eminence was also determined. The mean anterior joint space was 2.3 mm in the normal group and 2.8 mm in the TMD group, respectively. The results showed that there was a significant correlation between the superior and posterior joint spaces in both the normal and TMD groups, but it was only in the TMD group that the correlation coefficient among the dimensions of anterior and superior spaces was significant. There was a significant correlation between the inclination of articular eminence and the size of the superior and posterior spaces in the normal group. The average dimension of the anterior joint space was different between the two groups. CBCT could be considered a useful diagnostic imaging modality for TMD patients.
Journal of the California Dental Association, Oct 1, 2008
The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain ... more The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain (VITA VMK 95) and a reinforced composite rein (GC Gradia) was evaluated. Standardized specimens for each material was prepared. Specimens from each group were immersed in staining solutions at 50 degree Celsius for 30 days. Tea caused the most significant color change. DeltaE of all of the materials was changed after the immersion in all of the staining solutions during the experimental process.
AIM: This clinical report describes the occlusal rehabilitation of a partially edentulous patient... more AIM: This clinical report describes the occlusal rehabilitation of a partially edentulous patient with lost vertical dimension.BACKGROUND: The patient did not want a removable partial denture. Implants, fixed restorations with occlusal plane correction, were used to restore the anterior and posterior support and treat the severely worn dentition. However, a partially edentulous patient may be unable to recover normal function, esthetics, comfort, or phonetics with a conventional removable dental prosthesis. The use of dental implants-supported fixed prosthesis offers a multitude of benefits over a tooth-soft tissue supported removable partial denture prosthesis.SUMMARY: This clinical report describes an organized approach to an occlusal reconstruction of a severely worn dentition, partially edentulous patient with fixed restorations, implants, occlusal plane correction, and recovery of the vertical dimension. The treatment offered the patient improved esthetics and the restoration of oral function.CLINICAL SIGNIFICANCE: The main indications for implant-supported restorations in a partially edentulous patient are the elimination of the free-end distal extension and the benefit from fixed restorations. Success with implant-supported prosthodontics needs the same or more attention to detail and careful treatment planning for conventional fixed prosthodontics; a team approach is recommended.
Accurate impression making is an essential prerequisite for achieving a passive fit between the i... more Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques. Three acrylic resin mandibular master models with four parallel implants were used: Biohorizons (BIO), Straumann tissue-level (STL), and Straumann bone-level (SBL). Forty-two putty/wash polyvinyl siloxane impressions of the models were made using open-tray and closed-tray techniques. Closed-tray impressions were made using snap-on (STL model), transfer coping (TC) (BIO model) and TC plus plastic cap (TC-Cap) (SBL model). The impressions were poured with type IV stone, and the positional accuracy of the implant analog heads in each dimension (x, y and z axes), and the linear displacement (ΔR) were evaluated using a coordinate measuring machine. Data were analyzed using ANOVA and post-hoc Tukey tests (α = 0.05). The ΔR values ...
Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, ... more Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, joint morphology can be important for their orthodontic-surgical treatments. The aim of this study was to evaluate the relationship between facial height and TMJ morphology in skeletal class 3 patients.
With the introduction of skeletal anchorage system, recently it is possible to successfully intru... more With the introduction of skeletal anchorage system, recently it is possible to successfully intrude molar teeth. On the other hand, there have been concerns about periodontal changes associated with intrusion and there are few studies on this topic, especially for posterior teeth. Ten female patients were enrolled in this study. Maxillary molar intrusion was achieved by inserting two miniscrews and a 17 × 25 titanium molybdenum alloy spring. Crestal height changes were evaluated at three intervals including: Baseline (T0), end of active treatment (T1) and 6 months after retention (T2). Other variables including probing depth, gingival recession, attachment level and bleeding on probing were evaluated by clinical measurements in the three above mentioned intervals. One-sample Kolmogrov-Smirnov test ascertained the normality of the data. For all patients, the changes in tooth position and crestal height were evaluated using one-sample t-test. (P < 0.05). Supra-erupted molars were successfully intruded a mean of 2.1 ± 0.9 mm during active treatment (T0-T1). A mean bone resorption of 0.9 ± 0.9 mm in mesial crest and 1 ± 0.8 mm in distal crest had occurred in total treatment (T0-T2). A mean of 0.6 ± 1.4 mm bone was deposited on mesial crest during the retention period (T1-T2) following tooth relapse. On average, 0.8 ± 0.4 mm attachment gain was obtained. Gingival margin coronalized a mean of 0.8 ± 0.6 mm throughout the entire treatment. Probing depth showed no significant change during treatment. Within the limitations of this study, these results suggest that not only periodontal status was not negatively affected by intrusion, but also there were signs of periodontal improvement including attachment gain and shortening of clinical crown height.
This clinical report describes the occlusal rehabilitation of a partially edentulous patient with... more This clinical report describes the occlusal rehabilitation of a partially edentulous patient with lost vertical dimension. The patient did not want a removable partial denture. Implants, fixed restorations with occlusal plane correction, were used to restore the anterior and posterior support and treat the severely worn dentition. However, a partially edentulous patient may be unable to recover normal function, esthetics, comfort, or phonetics with a conventional removable dental prosthesis. The use of dental implants-supported fixed prosthesis offers a multitude of benefits over a tooth-soft tissue supported removable partial denture prosthesis. This clinical report describes an organized approach to an occlusal reconstruction of a severely worn dentition, partially edentulous patient with fixed restorations, implants, occlusal plane correction, and recovery of the vertical dimension. The treatment offered the patient improved esthetics and the restoration of oral function. The mai...
Journal of the California Dental Association, 2008
The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain ... more The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain (VITA VMK 95) and a reinforced composite rein (GC Gradia) was evaluated. Standardized specimens for each material was prepared. Specimens from each group were immersed in staining solutions at 50 degree Celsius for 30 days. Tea caused the most significant color change. DeltaE of all of the materials was changed after the immersion in all of the staining solutions during the experimental process.
Journal of the California Dental Association, 2012
Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, ... more Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, joint morphology can be important for their orthodontic-surgical treatments. The aim of this study was to evaluate the relationship between facial height and TMJ morphology in skeletal class 3 patients.
Low-level laser therapy (LLLT) has been commonly used for the treatment of painful musculoskeleta... more Low-level laser therapy (LLLT) has been commonly used for the treatment of painful musculoskeletal conditions, but the results of previous studies on this subject are controversial. The aim of this study was to evaluate the efficacy of LLLT in the management of patients with myogenic temporomandibular joint disorders (TMDs). In this randomized, double-blind clinical trial, 20 patients with myogenic TMD were randomly divided into laser and placebo groups. In the laser group, a pulsed 810-nm low-level laser (average power 50 mW, peak power 80 W, 1,500 Hz, 120 s, 6 J, and 3.4 J/cm(2) per point) was used on painful muscles three times a week for 4 weeks. In the placebo group, the treatment was the same as that in the laser group, but without energy output. The patients were evaluated before laser therapy (T1), after six sessions of laser application (T2), at the end of treatment (T3), and 1 month after the last application (T4), and the level of pain and the amount of mouth opening were measured. There was a significant increase in mouth opening and a significant reduction of pain symptoms in the laser group (p < 0.05). A similar improvement was not observed in the placebo group (p > 0.05). Between-group comparisons revealed no significant difference in pain intensity and mouth opening measurement at any of the evaluation time points (p > 0.05). LLLT can produce a significant improvement in pain level and mouth opening in patients affected with myogenic TMD.
Cranio : the journal of craniomandibular practice, 2005
The aim of the present study was to investigate the relationship between noncarious cervical lesi... more The aim of the present study was to investigate the relationship between noncarious cervical lesions (NCCL) and dental premature contacts (PC). Following examination of 1,974 teeth from 77 patients referred to the Department of Oral Medicine, Faculty of Dentistry, Mashad University of Medical Science, Iran, a total of 167 teeth were identified to have the criteria set for noncarious cervical lesions (regarded as NCCL group). Also, 167 teeth exhibiting no such lesions were selected randomly from the same population (regarded as control group). The results indicated that within the NCCL group, the frequency of noncarious cervical lesions differed significantly among the various teeth; the first premolar teeth showed the greatest number of cervical lesions, followed by the canine teeth, and the second molar teeth had the least number of lesions. A similar trend was detected in the total number of premature contacts among the seven types of teeth. The results revealed a highly significa...
This study was performed to compare the condylar position in patients with temporomandibular join... more This study was performed to compare the condylar position in patients with temporomandibular joint disorders (TMDs) and a normal group by using cone-beam computed tomography (CBCT). In the TMD group, 25 patients (5 men and 20 women) were randomly selected among the ones suffering from TMD according to the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). The control group consisted of 25 patients (8 men and 17 women) with normal temporomandibular joints (TMJs) who were referred to the radiology department in order to undergo CBCT scanning for implant treatment in the posterior maxilla. Linear measurements from the superior, anterior, and posterior joint spaces between the condyle and glenoid fossa were made through defined landmarks in the sagittal view. The inclination of articular eminence was also determined. The mean anterior joint space was 2.3 mm in the normal group and 2.8 mm in the TMD group, respectively. The results showed that there was a significant correlation between the superior and posterior joint spaces in both the normal and TMD groups, but it was only in the TMD group that the correlation coefficient among the dimensions of anterior and superior spaces was significant. There was a significant correlation between the inclination of articular eminence and the size of the superior and posterior spaces in the normal group. The average dimension of the anterior joint space was different between the two groups. CBCT could be considered a useful diagnostic imaging modality for TMD patients.
Journal of the California Dental Association, Oct 1, 2008
The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain ... more The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain (VITA VMK 95) and a reinforced composite rein (GC Gradia) was evaluated. Standardized specimens for each material was prepared. Specimens from each group were immersed in staining solutions at 50 degree Celsius for 30 days. Tea caused the most significant color change. DeltaE of all of the materials was changed after the immersion in all of the staining solutions during the experimental process.
AIM: This clinical report describes the occlusal rehabilitation of a partially edentulous patient... more AIM: This clinical report describes the occlusal rehabilitation of a partially edentulous patient with lost vertical dimension.BACKGROUND: The patient did not want a removable partial denture. Implants, fixed restorations with occlusal plane correction, were used to restore the anterior and posterior support and treat the severely worn dentition. However, a partially edentulous patient may be unable to recover normal function, esthetics, comfort, or phonetics with a conventional removable dental prosthesis. The use of dental implants-supported fixed prosthesis offers a multitude of benefits over a tooth-soft tissue supported removable partial denture prosthesis.SUMMARY: This clinical report describes an organized approach to an occlusal reconstruction of a severely worn dentition, partially edentulous patient with fixed restorations, implants, occlusal plane correction, and recovery of the vertical dimension. The treatment offered the patient improved esthetics and the restoration of oral function.CLINICAL SIGNIFICANCE: The main indications for implant-supported restorations in a partially edentulous patient are the elimination of the free-end distal extension and the benefit from fixed restorations. Success with implant-supported prosthodontics needs the same or more attention to detail and careful treatment planning for conventional fixed prosthodontics; a team approach is recommended.
Accurate impression making is an essential prerequisite for achieving a passive fit between the i... more Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques. Three acrylic resin mandibular master models with four parallel implants were used: Biohorizons (BIO), Straumann tissue-level (STL), and Straumann bone-level (SBL). Forty-two putty/wash polyvinyl siloxane impressions of the models were made using open-tray and closed-tray techniques. Closed-tray impressions were made using snap-on (STL model), transfer coping (TC) (BIO model) and TC plus plastic cap (TC-Cap) (SBL model). The impressions were poured with type IV stone, and the positional accuracy of the implant analog heads in each dimension (x, y and z axes), and the linear displacement (ΔR) were evaluated using a coordinate measuring machine. Data were analyzed using ANOVA and post-hoc Tukey tests (α = 0.05). The ΔR values ...
Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, ... more Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, joint morphology can be important for their orthodontic-surgical treatments. The aim of this study was to evaluate the relationship between facial height and TMJ morphology in skeletal class 3 patients.
With the introduction of skeletal anchorage system, recently it is possible to successfully intru... more With the introduction of skeletal anchorage system, recently it is possible to successfully intrude molar teeth. On the other hand, there have been concerns about periodontal changes associated with intrusion and there are few studies on this topic, especially for posterior teeth. Ten female patients were enrolled in this study. Maxillary molar intrusion was achieved by inserting two miniscrews and a 17 × 25 titanium molybdenum alloy spring. Crestal height changes were evaluated at three intervals including: Baseline (T0), end of active treatment (T1) and 6 months after retention (T2). Other variables including probing depth, gingival recession, attachment level and bleeding on probing were evaluated by clinical measurements in the three above mentioned intervals. One-sample Kolmogrov-Smirnov test ascertained the normality of the data. For all patients, the changes in tooth position and crestal height were evaluated using one-sample t-test. (P < 0.05). Supra-erupted molars were successfully intruded a mean of 2.1 ± 0.9 mm during active treatment (T0-T1). A mean bone resorption of 0.9 ± 0.9 mm in mesial crest and 1 ± 0.8 mm in distal crest had occurred in total treatment (T0-T2). A mean of 0.6 ± 1.4 mm bone was deposited on mesial crest during the retention period (T1-T2) following tooth relapse. On average, 0.8 ± 0.4 mm attachment gain was obtained. Gingival margin coronalized a mean of 0.8 ± 0.6 mm throughout the entire treatment. Probing depth showed no significant change during treatment. Within the limitations of this study, these results suggest that not only periodontal status was not negatively affected by intrusion, but also there were signs of periodontal improvement including attachment gain and shortening of clinical crown height.
This clinical report describes the occlusal rehabilitation of a partially edentulous patient with... more This clinical report describes the occlusal rehabilitation of a partially edentulous patient with lost vertical dimension. The patient did not want a removable partial denture. Implants, fixed restorations with occlusal plane correction, were used to restore the anterior and posterior support and treat the severely worn dentition. However, a partially edentulous patient may be unable to recover normal function, esthetics, comfort, or phonetics with a conventional removable dental prosthesis. The use of dental implants-supported fixed prosthesis offers a multitude of benefits over a tooth-soft tissue supported removable partial denture prosthesis. This clinical report describes an organized approach to an occlusal reconstruction of a severely worn dentition, partially edentulous patient with fixed restorations, implants, occlusal plane correction, and recovery of the vertical dimension. The treatment offered the patient improved esthetics and the restoration of oral function. The mai...
Journal of the California Dental Association, 2008
The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain ... more The effect of tea, cola, orange juice, and distilled water on the color stability of a porcelain (VITA VMK 95) and a reinforced composite rein (GC Gradia) was evaluated. Standardized specimens for each material was prepared. Specimens from each group were immersed in staining solutions at 50 degree Celsius for 30 days. Tea caused the most significant color change. DeltaE of all of the materials was changed after the immersion in all of the staining solutions during the experimental process.
Journal of the California Dental Association, 2012
Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, ... more Class 3 patients may have relatively high prevalences of temporomandibular disorders; therefore, joint morphology can be important for their orthodontic-surgical treatments. The aim of this study was to evaluate the relationship between facial height and TMJ morphology in skeletal class 3 patients.
Low-level laser therapy (LLLT) has been commonly used for the treatment of painful musculoskeleta... more Low-level laser therapy (LLLT) has been commonly used for the treatment of painful musculoskeletal conditions, but the results of previous studies on this subject are controversial. The aim of this study was to evaluate the efficacy of LLLT in the management of patients with myogenic temporomandibular joint disorders (TMDs). In this randomized, double-blind clinical trial, 20 patients with myogenic TMD were randomly divided into laser and placebo groups. In the laser group, a pulsed 810-nm low-level laser (average power 50 mW, peak power 80 W, 1,500 Hz, 120 s, 6 J, and 3.4 J/cm(2) per point) was used on painful muscles three times a week for 4 weeks. In the placebo group, the treatment was the same as that in the laser group, but without energy output. The patients were evaluated before laser therapy (T1), after six sessions of laser application (T2), at the end of treatment (T3), and 1 month after the last application (T4), and the level of pain and the amount of mouth opening were measured. There was a significant increase in mouth opening and a significant reduction of pain symptoms in the laser group (p < 0.05). A similar improvement was not observed in the placebo group (p > 0.05). Between-group comparisons revealed no significant difference in pain intensity and mouth opening measurement at any of the evaluation time points (p > 0.05). LLLT can produce a significant improvement in pain level and mouth opening in patients affected with myogenic TMD.
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