Riyadh Akeel - Academia.edu (original) (raw)

Papers by Riyadh Akeel

Research paper thumbnail of Sentiments expressed in relation to tooth loss: a qualitative study among edentulous Saudis

The objective was to explore and gain insight into the sentiments surrounding tooth loss in a gro... more The objective was to explore and gain insight into the sentiments surrounding tooth loss in a group of edentulous Saudis. Using a qualitative methodology, 44 edentulous patients who were receiving complete denture treatment were interviewed in private, in the Arabic language. Interviews were tape recorded and semistructured, following a list of predetermined and piloted topics, but dialogue also took place, with the freedom for both interviewer and interviewee to explore areas of interest. All recordings were transcribed, translated into English, and interpreted independently by two members of the team to identify the core themes associated with tooth loss. The mean age of participants was 58.9 years (range 35 to 72 years), and they had been edentulous for a mean of 7.1 years (range 3 months to 22 years). The main themes related to tooth loss were unqualified acceptance, inevitability with old age, behavior changes with respect to eating comfort, aged appearance, self-responsibility, positively perceived benefits, high prosthetic expectations and reduced level of denture satisfaction, and some need for privacy. The lack of any outward indication that participants experienced bereavement suggests that outlook on life can influence the impact of tooth loss. Participants' unqualified acceptance of their edentulous fate, yet their clear need to "normalize" oral function, reflects a degree of pragmatism toward life events. The strong influence of religion in Saudi society is a possible factor in the sentiments expressed.

Research paper thumbnail of Satisfaction with oral status among adult school-attending Saudi women with and without posterior fixed partial dentures

Quintessence international, 2007

UNLABELLED To conduct a preliminary investigation of the relationship between patient satisfactio... more UNLABELLED To conduct a preliminary investigation of the relationship between patient satisfaction with oral status and the presence of posterior fixed partial dentures (FPD). METHOD AND MATERIALS A total of 150 women with intact anterior dental segments, randomly drawn from women's schools for adult education, participated (mean age, 33.8 years; SD, 10.4; range, 20 to 63 years). Each woman was assisted in completing a questionnaire on aspects of her oral health beliefs and satisfaction with oral function, and underwent an on-site clinical examination. Subjects were categorized according to general prosthodontic status: those with missing posterior teeth and no FPDs (MN), those with FPDs (PR), and those who were fully dentate (FD). Their responses to the questionnaire were compared. RESULTS Value placed on oral health did not differ among the groups. Satisfaction with overall oral status, chewing function, and appearance did not differ between MN and PR, although overall satisfa...

Research paper thumbnail of Análisis retrospectivo de los factores relacionados con el estado periapical de los dientes endodonciados y restaurados

Objetivo. - Con este estudio se ha pretendido investigar las posibles relaciones entre los factor... more Objetivo. - Con este estudio se ha pretendido investigar las posibles relaciones entre los factores protesicos, oclusales, endodoncicos y periodontales y el estado endodoncico de los dientes endodonciados. Material y metodos: Se pidio a 46 pacientes que se habian sometido a tratamiento endodoncico seguido de la colocacion de una restauracion fija al menos en uno de sus dientes que volvieran y se sometieran a una exploracion clinica y radiologica de acuerdo con una serie de criterios de valoracion preestablecidos. En total se examinaron 89 dientes, en los que se valoro la restauracion coronal, el poste y el munon, las relaciones de contactos oclusales, una serie de parametros endodoncicos y el estado periodontal de los dientes estudiados. Para esta ultima valoracion se establecio una comparacion con 54 dientes contralaterales. Los dientes se dividieron en dos grupos: con y sin radiolucideces periapicales, y se analizaron mediante regresion logistica las diferencias entre los grupos e...

Research paper thumbnail of The Influence of Tightening Protocols and Sequence of Implant Superstructure on Screw Preload

Research paper thumbnail of A retrospective analysis of factors associated with the periapical status of restored, endodontically treated teeth

The International journal of prosthodontics, 2003

PURPOSE The purpose of this study was to explore possible associations between prosthodontic, occ... more PURPOSE The purpose of this study was to explore possible associations between prosthodontic, occlusal, endodontic, and periodontal factors and the endodontic status of endodontically treated teeth. MATERIALS AND METHODS Forty-six patients who had received endodontic treatment followed by a fixed restoration for at least one of their teeth were recalled and examined clinically and radiographically according to a predetermined set of evaluation criteria. A total of 89 teeth were included, and data obtained included assessments of the coronal restoration and post and core, occlusal contact relationships, a number of endodontic parameters, and periodontal status of the study teeth. For the latter assessment, 54 contralateral teeth were available for purposes of comparison. Teeth were grouped into those with and without periapical radiolucencies, and differences between the groups, with respect to all parameters, were analyzed by logistic regression. RESULTS Three factors were significa...

Research paper thumbnail of Reliability of Occlusal Contact Markings in Varied Chair Position

The purpose of this study is to examine the effect of biting force in relation to two dental chai... more The purpose of this study is to examine the effect of biting force in relation to two dental chair positions (Supine and upright), on the number and distribution of recorded occlusal contacts. Sixteen male subjects carried out light and heavy biting on a 40 μm occlusal marking indicator in supine and upright chair positions. An occlusal photograph was taken for each experiment making a total of four photographs for each subject. Subjects showed significantly lower number of contacts in light biting compared to heavy biting in both of chair positions. No significant difference was found between upright and supine chair position during heavy biting. There was a small difference, which was not statistically significant, in the number of contacts between upright and supine chair positions during light biting. In conclusion, the recorded occlusal contacts are affected by chair position and level of biting force which should be considered during occlusal examination and adjustment.

Research paper thumbnail of Systemic and Local Risk Factors for Dental Implants in Partially Edentulous Patients

Abstract. The aim of this study was to evaluate the incidence of certain risk factors for placing... more Abstract. The aim of this study was to evaluate the incidence of certain risk factors for placing dental implants in partially edentulous patients. Three hundred panoramic radiographs were examined. The bone height that can accommodate the longest possible fixture in edentulous spaces without interfering with vital structures was measured using a glossy template at a magnification of 20%. Medical conditions and smoking habits were also obtained from the patients records. Twenty-four percent of all patients had at least one area of deficient bone height (<7 mm). The region that most commonly exhibited bone height deficiency was the maxillary molar and premolar area (40% and 16% respectively). At least one systemic condition was found in 36% of cases and 12% of the sample were smokers. Fifty-nine percent of all cases had at least one risk factor for implant treatment. It is concluded that ideal local and systemic conditions for implants are uncommon in partially edentulous patients...

Research paper thumbnail of Effect of Edentulous Ridge Length on the Fit of Occlusal Rests of a Partial Denture Metal Framework

Several factors have been identified in the literature that appear to affect the adaptation of RP... more Several factors have been identified in the literature that appear to affect the adaptation of RPD frameworks to the cast or to the teeth, but no information is available on the effect of the length of the edentulous span. The aim of this in vitro study was to assess the effect of edentulous ridge length on the fit of RPD occlusal rests to the working cast. A model of a Kennedy class III modification 1 dental arch with four metal abutments and two edentulous areas ridges of different lengths was used for the study. Following rest seats and guide planes preparation, 30 identical working casts were obtained to produce 30 RPD frameworks. No attempt was made to improve the fit of the casting on the working cast. The frameworks were seated on the working casts, boxed and encased in dental stone prior to sectioning through the rest seats in an antero-posterior direction. The gaps between the rests and rest seats were measured at the marginal ridge (R), center (C), and terminal location (T...

Research paper thumbnail of Effect of Single Off-Axis Implant Placement on Abutment Screw Stability Under Lateral Loading

The International Journal of Oral & Maxillofacial Implants, 2016

The aim of this study was to evaluate the effect of off-axis implant placement in relation to the... more The aim of this study was to evaluate the effect of off-axis implant placement in relation to the prosthetic crown on abutment screw loosening under different directions of twisting moments. Materials and Methods: Twenty-one implant assemblies were divided equally into three groups (n = 7). Each assembly consisted of an internal-octagon implant measuring 4.1 × 12 mm (standard plus implants) with corresponding 5.5-mm synocta abutments (Straumann) mounted in an epoxy resin-glass fiber composite. Group A had a straight implant configuration in relation to the prosthetic crown and was subjected to clockwise twisting moment (control). The other two groups, B and C, with off-axis implant placement were subjected to clockwise and counterclockwise moments, respectively. A lateral load of 80 N was applied to the specimens for 1 × 10 6 cycles at 90 degrees to the long axis of the implant. The loading point was 4 mm from the center of the implant in group A and 6 mm in groups B and C. The reverse torque value (RTV) of the abutment screw was measured before and after loading. Data were analyzed using a paired samples t test and one-way analysis of variance (ANOVA) at a significance level of α = .05. Results: An increase in postloading RTV was found relative to preloading RTV in all groups, but was only significant in group A (P < .05). The mean reverse torque difference (RTD) was higher in group A (3.17 ± 1.04 Ncm), followed by groups B (1.03 ± 1.41 Ncm) and C (0.43 ± 1.09 Ncm). A significant difference in RTD was noted between group A and the remaining groups (P < .05). However, no significant difference was found between groups B and C (P > .05). Conclusion: Placement of an implant in an off-axis relation to the prosthetic crown resulted in significantly lower reverse torque values compared with straight implant configuration. However, the extent of reduction in Ncm is small and is considered clinically insignificant in the studied implant system. Furthermore, no significant difference was found in RTV between clockwise and counterclockwise twisting moments.

Research paper thumbnail of An objective classification of chewing cycles based on chewing forces

Research paper thumbnail of A New Method for Measuring Masticatory Forces on Implant Stabilized Mandibular Overdentures

Research paper thumbnail of Dynamic recording of force on dental implants: a new transducer

Research paper thumbnail of Masticatory efficiency A literature review

Saudi Dental Journal

ABSTRACT

Research paper thumbnail of Masticatory efficiency in individuals with natural dentition

Research paper thumbnail of Masticatory adaptation after insertion of replacement dentures

Research paper thumbnail of Flat vs non-flat occlusal splints in the treatment of TMD patients

Research paper thumbnail of Dental anxiety among patients attending King Saud university, College of Dentistry

Saudi Dental Journal

... ORIGINAL ARTICLE Dental anxiety among patients attending King Saud University, College of Den... more ... ORIGINAL ARTICLE Dental anxiety among patients attending King Saud University, College of Dentistry Riyadh F. Akeel,* BDS, MDS, PhD Adel Abduljabbar,* PhD ... General Directorate of research grants programs - King Abdul-Aziz city for Science and Technology - Riyadh. ...

Research paper thumbnail of Systemic and local risk factors for dental implants in partially edentulous patients

The aim of this study was to evaluate the incidence of certain risk factors for placing dental im... more The aim of this study was to evaluate the incidence of certain risk factors for placing dental implants in partially edentulous patients. Three hundred panoramic radiographs were examined. The bone height that can accommodate the longest possible fixture in edentulous spaces without interfering with vital structures was measured using a glossy template at a magnification of 20%. Medical conditions and smoking habits were also obtained from the patients records. Twenty-four percent of all patients had at least one area of deficient bone height (<7 mm). The region that most commonly exhibited bone height deficiency was the maxillary molar and premolar area (40% and 16% respectively). At least one systemic condition was found in 36% of cases and 12% of the sample were smokers. Fifty-nine percent of all cases had at least one risk factor for implant treatment. It is concluded that ideal local and systemic conditions for implants are uncommon in partially edentulous patients.

Research paper thumbnail of Effect of edentulous ridge length on the fit of occlusal rests of a partial denture metal framework

Several factors have been identified in the literature that appear to affect the adaptation of RP... more Several factors have been identified in the literature that appear to affect the adaptation of RPD frameworks to the cast or to the teeth, but no information is available on the effect of the length of the edentulous span. The aim of this in vitro study was to assess the effect of edentulous ridge length on the fit of RPD occlusal rests to the working cast. A model of a Kennedy class III modification 1 dental arch with four metal abutments and two edentulous areas ridges of different lengths was used for the study. Following rest seats and guide planes preparation, 30 identical working casts were obtained to produce 30 RPD frameworks. No attempt was made to improve the fit of the casting on the working cast. The frameworks were seated on the working casts, boxed and encased in dental stone prior to sectioning through the rest seats in an antero-posterior direction. The gaps between the rests and rest seats were measured at the marginal ridge (R), center (C), and terminal location (T) of each rest to the nearest 1 μm. The mean gap of the three locations was significantly greater in the longer edentulous ridge in both the premolar and molar abutments (p<0.001). The gap at the (C) location was 2-3 times the gap at the (R) and (T) locations. Of the 120 occlusal rests, 22% did not contact the opposing rest seat at any measured point (>50 μm). It can be concluded that the fit of the bounded saddle RPD framework occlusal rests is worse on abutments adjacent to long edentulous ridges compared to those adjacent to short edentulous ridges.

Research paper thumbnail of EMG and Pain Severity Evaluation in Patients with TMD Using Two Different Occlusal Devices

The International journal of prosthodontics

I ncreased muscle activity has been described as a causative factor of pain in temporomandibular ... more I ncreased muscle activity has been described as a causative factor of pain in temporomandibular disorders (TMD) patients. 1-4 Those studies found a high level of muscle activity in patients with TMD compared to nonpatients. Others have shown lower muscle activity following improvement in TMD signs and symptoms. 5-7 According to many clinical trials, occlusal splints can be beneficial in the treatment of TMD. Their clinical efficacy in mandibular dysfunction has been shown in several studies. 8-13 Other studies have shown that occlusal devices can also reduce muscle activity in nonpatients 14,15 as well as in TMD patients. 16-18 Several explanations have been offered for the clinical effectiveness of occlusal devices. 19 Now, the precise mechanism of the action of occlusal devices is inconclusive. A group of researchers believes that the reduction of muscle activity is because of the introduction of an optimum occlusal condition that reorganizes the neuromuscular reflex activity, which in turn reduces muscle pain. 20,21 Conversely, some studies show that the relationship between occlusion and TMD is very weak 22 or not significant. 23-25 Others have shown total improvement of TMD symptoms after a placebo occlusal treatment 26 and with many conservative modalities, including a variety of devices with different occlusal schemes 16,27 and nonadjusted occlusal devices. 28

Research paper thumbnail of Sentiments expressed in relation to tooth loss: a qualitative study among edentulous Saudis

The objective was to explore and gain insight into the sentiments surrounding tooth loss in a gro... more The objective was to explore and gain insight into the sentiments surrounding tooth loss in a group of edentulous Saudis. Using a qualitative methodology, 44 edentulous patients who were receiving complete denture treatment were interviewed in private, in the Arabic language. Interviews were tape recorded and semistructured, following a list of predetermined and piloted topics, but dialogue also took place, with the freedom for both interviewer and interviewee to explore areas of interest. All recordings were transcribed, translated into English, and interpreted independently by two members of the team to identify the core themes associated with tooth loss. The mean age of participants was 58.9 years (range 35 to 72 years), and they had been edentulous for a mean of 7.1 years (range 3 months to 22 years). The main themes related to tooth loss were unqualified acceptance, inevitability with old age, behavior changes with respect to eating comfort, aged appearance, self-responsibility, positively perceived benefits, high prosthetic expectations and reduced level of denture satisfaction, and some need for privacy. The lack of any outward indication that participants experienced bereavement suggests that outlook on life can influence the impact of tooth loss. Participants&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; unqualified acceptance of their edentulous fate, yet their clear need to &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;quot;normalize&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;quot; oral function, reflects a degree of pragmatism toward life events. The strong influence of religion in Saudi society is a possible factor in the sentiments expressed.

Research paper thumbnail of Satisfaction with oral status among adult school-attending Saudi women with and without posterior fixed partial dentures

Quintessence international, 2007

UNLABELLED To conduct a preliminary investigation of the relationship between patient satisfactio... more UNLABELLED To conduct a preliminary investigation of the relationship between patient satisfaction with oral status and the presence of posterior fixed partial dentures (FPD). METHOD AND MATERIALS A total of 150 women with intact anterior dental segments, randomly drawn from women's schools for adult education, participated (mean age, 33.8 years; SD, 10.4; range, 20 to 63 years). Each woman was assisted in completing a questionnaire on aspects of her oral health beliefs and satisfaction with oral function, and underwent an on-site clinical examination. Subjects were categorized according to general prosthodontic status: those with missing posterior teeth and no FPDs (MN), those with FPDs (PR), and those who were fully dentate (FD). Their responses to the questionnaire were compared. RESULTS Value placed on oral health did not differ among the groups. Satisfaction with overall oral status, chewing function, and appearance did not differ between MN and PR, although overall satisfa...

Research paper thumbnail of Análisis retrospectivo de los factores relacionados con el estado periapical de los dientes endodonciados y restaurados

Objetivo. - Con este estudio se ha pretendido investigar las posibles relaciones entre los factor... more Objetivo. - Con este estudio se ha pretendido investigar las posibles relaciones entre los factores protesicos, oclusales, endodoncicos y periodontales y el estado endodoncico de los dientes endodonciados. Material y metodos: Se pidio a 46 pacientes que se habian sometido a tratamiento endodoncico seguido de la colocacion de una restauracion fija al menos en uno de sus dientes que volvieran y se sometieran a una exploracion clinica y radiologica de acuerdo con una serie de criterios de valoracion preestablecidos. En total se examinaron 89 dientes, en los que se valoro la restauracion coronal, el poste y el munon, las relaciones de contactos oclusales, una serie de parametros endodoncicos y el estado periodontal de los dientes estudiados. Para esta ultima valoracion se establecio una comparacion con 54 dientes contralaterales. Los dientes se dividieron en dos grupos: con y sin radiolucideces periapicales, y se analizaron mediante regresion logistica las diferencias entre los grupos e...

Research paper thumbnail of The Influence of Tightening Protocols and Sequence of Implant Superstructure on Screw Preload

Research paper thumbnail of A retrospective analysis of factors associated with the periapical status of restored, endodontically treated teeth

The International journal of prosthodontics, 2003

PURPOSE The purpose of this study was to explore possible associations between prosthodontic, occ... more PURPOSE The purpose of this study was to explore possible associations between prosthodontic, occlusal, endodontic, and periodontal factors and the endodontic status of endodontically treated teeth. MATERIALS AND METHODS Forty-six patients who had received endodontic treatment followed by a fixed restoration for at least one of their teeth were recalled and examined clinically and radiographically according to a predetermined set of evaluation criteria. A total of 89 teeth were included, and data obtained included assessments of the coronal restoration and post and core, occlusal contact relationships, a number of endodontic parameters, and periodontal status of the study teeth. For the latter assessment, 54 contralateral teeth were available for purposes of comparison. Teeth were grouped into those with and without periapical radiolucencies, and differences between the groups, with respect to all parameters, were analyzed by logistic regression. RESULTS Three factors were significa...

Research paper thumbnail of Reliability of Occlusal Contact Markings in Varied Chair Position

The purpose of this study is to examine the effect of biting force in relation to two dental chai... more The purpose of this study is to examine the effect of biting force in relation to two dental chair positions (Supine and upright), on the number and distribution of recorded occlusal contacts. Sixteen male subjects carried out light and heavy biting on a 40 μm occlusal marking indicator in supine and upright chair positions. An occlusal photograph was taken for each experiment making a total of four photographs for each subject. Subjects showed significantly lower number of contacts in light biting compared to heavy biting in both of chair positions. No significant difference was found between upright and supine chair position during heavy biting. There was a small difference, which was not statistically significant, in the number of contacts between upright and supine chair positions during light biting. In conclusion, the recorded occlusal contacts are affected by chair position and level of biting force which should be considered during occlusal examination and adjustment.

Research paper thumbnail of Systemic and Local Risk Factors for Dental Implants in Partially Edentulous Patients

Abstract. The aim of this study was to evaluate the incidence of certain risk factors for placing... more Abstract. The aim of this study was to evaluate the incidence of certain risk factors for placing dental implants in partially edentulous patients. Three hundred panoramic radiographs were examined. The bone height that can accommodate the longest possible fixture in edentulous spaces without interfering with vital structures was measured using a glossy template at a magnification of 20%. Medical conditions and smoking habits were also obtained from the patients records. Twenty-four percent of all patients had at least one area of deficient bone height (<7 mm). The region that most commonly exhibited bone height deficiency was the maxillary molar and premolar area (40% and 16% respectively). At least one systemic condition was found in 36% of cases and 12% of the sample were smokers. Fifty-nine percent of all cases had at least one risk factor for implant treatment. It is concluded that ideal local and systemic conditions for implants are uncommon in partially edentulous patients...

Research paper thumbnail of Effect of Edentulous Ridge Length on the Fit of Occlusal Rests of a Partial Denture Metal Framework

Several factors have been identified in the literature that appear to affect the adaptation of RP... more Several factors have been identified in the literature that appear to affect the adaptation of RPD frameworks to the cast or to the teeth, but no information is available on the effect of the length of the edentulous span. The aim of this in vitro study was to assess the effect of edentulous ridge length on the fit of RPD occlusal rests to the working cast. A model of a Kennedy class III modification 1 dental arch with four metal abutments and two edentulous areas ridges of different lengths was used for the study. Following rest seats and guide planes preparation, 30 identical working casts were obtained to produce 30 RPD frameworks. No attempt was made to improve the fit of the casting on the working cast. The frameworks were seated on the working casts, boxed and encased in dental stone prior to sectioning through the rest seats in an antero-posterior direction. The gaps between the rests and rest seats were measured at the marginal ridge (R), center (C), and terminal location (T...

Research paper thumbnail of Effect of Single Off-Axis Implant Placement on Abutment Screw Stability Under Lateral Loading

The International Journal of Oral & Maxillofacial Implants, 2016

The aim of this study was to evaluate the effect of off-axis implant placement in relation to the... more The aim of this study was to evaluate the effect of off-axis implant placement in relation to the prosthetic crown on abutment screw loosening under different directions of twisting moments. Materials and Methods: Twenty-one implant assemblies were divided equally into three groups (n = 7). Each assembly consisted of an internal-octagon implant measuring 4.1 × 12 mm (standard plus implants) with corresponding 5.5-mm synocta abutments (Straumann) mounted in an epoxy resin-glass fiber composite. Group A had a straight implant configuration in relation to the prosthetic crown and was subjected to clockwise twisting moment (control). The other two groups, B and C, with off-axis implant placement were subjected to clockwise and counterclockwise moments, respectively. A lateral load of 80 N was applied to the specimens for 1 × 10 6 cycles at 90 degrees to the long axis of the implant. The loading point was 4 mm from the center of the implant in group A and 6 mm in groups B and C. The reverse torque value (RTV) of the abutment screw was measured before and after loading. Data were analyzed using a paired samples t test and one-way analysis of variance (ANOVA) at a significance level of α = .05. Results: An increase in postloading RTV was found relative to preloading RTV in all groups, but was only significant in group A (P < .05). The mean reverse torque difference (RTD) was higher in group A (3.17 ± 1.04 Ncm), followed by groups B (1.03 ± 1.41 Ncm) and C (0.43 ± 1.09 Ncm). A significant difference in RTD was noted between group A and the remaining groups (P < .05). However, no significant difference was found between groups B and C (P > .05). Conclusion: Placement of an implant in an off-axis relation to the prosthetic crown resulted in significantly lower reverse torque values compared with straight implant configuration. However, the extent of reduction in Ncm is small and is considered clinically insignificant in the studied implant system. Furthermore, no significant difference was found in RTV between clockwise and counterclockwise twisting moments.

Research paper thumbnail of An objective classification of chewing cycles based on chewing forces

Research paper thumbnail of A New Method for Measuring Masticatory Forces on Implant Stabilized Mandibular Overdentures

Research paper thumbnail of Dynamic recording of force on dental implants: a new transducer

Research paper thumbnail of Masticatory efficiency A literature review

Saudi Dental Journal

ABSTRACT

Research paper thumbnail of Masticatory efficiency in individuals with natural dentition

Research paper thumbnail of Masticatory adaptation after insertion of replacement dentures

Research paper thumbnail of Flat vs non-flat occlusal splints in the treatment of TMD patients

Research paper thumbnail of Dental anxiety among patients attending King Saud university, College of Dentistry

Saudi Dental Journal

... ORIGINAL ARTICLE Dental anxiety among patients attending King Saud University, College of Den... more ... ORIGINAL ARTICLE Dental anxiety among patients attending King Saud University, College of Dentistry Riyadh F. Akeel,* BDS, MDS, PhD Adel Abduljabbar,* PhD ... General Directorate of research grants programs - King Abdul-Aziz city for Science and Technology - Riyadh. ...

Research paper thumbnail of Systemic and local risk factors for dental implants in partially edentulous patients

The aim of this study was to evaluate the incidence of certain risk factors for placing dental im... more The aim of this study was to evaluate the incidence of certain risk factors for placing dental implants in partially edentulous patients. Three hundred panoramic radiographs were examined. The bone height that can accommodate the longest possible fixture in edentulous spaces without interfering with vital structures was measured using a glossy template at a magnification of 20%. Medical conditions and smoking habits were also obtained from the patients records. Twenty-four percent of all patients had at least one area of deficient bone height (<7 mm). The region that most commonly exhibited bone height deficiency was the maxillary molar and premolar area (40% and 16% respectively). At least one systemic condition was found in 36% of cases and 12% of the sample were smokers. Fifty-nine percent of all cases had at least one risk factor for implant treatment. It is concluded that ideal local and systemic conditions for implants are uncommon in partially edentulous patients.

Research paper thumbnail of Effect of edentulous ridge length on the fit of occlusal rests of a partial denture metal framework

Several factors have been identified in the literature that appear to affect the adaptation of RP... more Several factors have been identified in the literature that appear to affect the adaptation of RPD frameworks to the cast or to the teeth, but no information is available on the effect of the length of the edentulous span. The aim of this in vitro study was to assess the effect of edentulous ridge length on the fit of RPD occlusal rests to the working cast. A model of a Kennedy class III modification 1 dental arch with four metal abutments and two edentulous areas ridges of different lengths was used for the study. Following rest seats and guide planes preparation, 30 identical working casts were obtained to produce 30 RPD frameworks. No attempt was made to improve the fit of the casting on the working cast. The frameworks were seated on the working casts, boxed and encased in dental stone prior to sectioning through the rest seats in an antero-posterior direction. The gaps between the rests and rest seats were measured at the marginal ridge (R), center (C), and terminal location (T) of each rest to the nearest 1 μm. The mean gap of the three locations was significantly greater in the longer edentulous ridge in both the premolar and molar abutments (p<0.001). The gap at the (C) location was 2-3 times the gap at the (R) and (T) locations. Of the 120 occlusal rests, 22% did not contact the opposing rest seat at any measured point (>50 μm). It can be concluded that the fit of the bounded saddle RPD framework occlusal rests is worse on abutments adjacent to long edentulous ridges compared to those adjacent to short edentulous ridges.

Research paper thumbnail of EMG and Pain Severity Evaluation in Patients with TMD Using Two Different Occlusal Devices

The International journal of prosthodontics

I ncreased muscle activity has been described as a causative factor of pain in temporomandibular ... more I ncreased muscle activity has been described as a causative factor of pain in temporomandibular disorders (TMD) patients. 1-4 Those studies found a high level of muscle activity in patients with TMD compared to nonpatients. Others have shown lower muscle activity following improvement in TMD signs and symptoms. 5-7 According to many clinical trials, occlusal splints can be beneficial in the treatment of TMD. Their clinical efficacy in mandibular dysfunction has been shown in several studies. 8-13 Other studies have shown that occlusal devices can also reduce muscle activity in nonpatients 14,15 as well as in TMD patients. 16-18 Several explanations have been offered for the clinical effectiveness of occlusal devices. 19 Now, the precise mechanism of the action of occlusal devices is inconclusive. A group of researchers believes that the reduction of muscle activity is because of the introduction of an optimum occlusal condition that reorganizes the neuromuscular reflex activity, which in turn reduces muscle pain. 20,21 Conversely, some studies show that the relationship between occlusion and TMD is very weak 22 or not significant. 23-25 Others have shown total improvement of TMD symptoms after a placebo occlusal treatment 26 and with many conservative modalities, including a variety of devices with different occlusal schemes 16,27 and nonadjusted occlusal devices. 28