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ABSTRACT: Temporomandibular joint (TMJ) sounds are frequent in patients. The aim of this study was to analyze patients with clicking at the end of opening and at the beginning of closing their mouths treated by muscular exercises through chewing and by occlusal splints. Fifteen patients with clinically verified clicking and TMJ and 15 patients without sounds were selected by the Research Diagnostic Criteria for Temporomandibular Disorders. They were submitted to electrovibratography at consultation and 60 and 120 days of treatment by occlusal splints and exercises. Patients demonstrated significant reduction of TMJ sounds after treatment, but vibration intensity was not similar with that of the control group after 120 days.
The Journal of craniofacial surgery 11/2011; 22(6):e14-6. · 0.81 Impact Factor
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ABSTRACT: The purpose of this study was to assess, through electromyographic activity (EMG), the silent period (SP) of masseter and anterior temporal muscles in dentate subjects (DS) and complete denture wearers (CDW).
The evaluations were performed at the initial and final period of the mastication for the DS group. For the CDW group, the evaluations were performed at the initial period of mastication, with old complete dentures worn for more than 10 years (OCDW) and at the final period of the mastication with new complete dentures (NCDW), 5 months after rehabilitation. Twenty-four asymptomatic subjects (12 DS, 12 CDW) answered a questionnaire based on the Research Diagnostic Criteria for temporomandibular disorders. The CDW group answered the questionnaire before and after new denture insertion and after 5 months of rehabilitation. The SP of the muscles was recorded through EMG at the initial and final periods of mastication using artificial food (Optocal). The operator monitored 35 chewing cycles performed to grind the artificial food and selected eight open-close-clench-chewing cycles for the record.
The SP of the muscles analyzed with new complete dentures showed no statistical difference in comparison to the old dentures. There was a statistically significant difference in the SP between the CDW and DS groups for initial and final chewing.
Lowered muscular capacity and ability reduced the SP of muscles after rehabilitation with NCDWs.
Journal of Prosthodontics 02/2011; 20(2):130-4. · 1.01 Impact Factor
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ABSTRACT: This study evaluated the relationship between anxiety levels and severity degrees of chronic orofacial pain of temporomandibular disorder in brazilian university students.
150 volunteers (117 men and 33 women), with age ranging from 17 to 30 years, were subjects to this study. Spielberger's trait-state anxiety inventory was used to evaluate trait and state anxiety of the students, while examination for chronic orofacial pain was performed in accordance with the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). Association between anxiety levels and severity degrees of chronic orofacial pain was tested using the Chi-square test. The significance level was set at p<.05.
The results showed that 32.7% (n=49) of the subjects exhibited TMD, and the intensity of chronic orofacial pain was classified as degree 1 in 85.7% (n=42) and as degree 2 in 14.3% (n=7) of them. Based on the results of the Spielberger's trait-state anxiety inventory, the majority of the students had moderate anxiety (48.6% and 48.1%, respectively). The correlation between trait-anxiety levels and chronic orofacial pain degrees was significant and positive (p<.05). However, no significant correlation was found to state-anxiety levels and chronic orofacial pain degrees (p>.05).
It was concluded that chronic orofacial pain of TMD could be present in university students and anxiety may be related.
Journal of prosthodontic research. 11/2010; 55(3):154-8.
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ABSTRACT: The record of electrical activity of elevator muscles in mandible is important for the evaluation of muscular potency and diagnosis of neuromuscular pathologies, which allows prevention and treatment. The aim of this study was to define silent periods (SPs) and the importance in dentistry and compare the SPs in masticatory muscles of dentate and edentulous patients wearing prosthesis considering the presence or absence of craniomandibular dysfunction (CMD).
Literature review in PubMed database.
Silent periods are isolated pulses of transcranial magnetic stimulation in the primary motor cortex during voluntary muscular activity that generates an interruption of muscular activity for hundredths of milliseconds. The SP duration depends on the patient (dentate or edentulous), type of stimulus, and presence of CMD.
The SP is higher in complete edentulous patients and in individuals with occlusal disharmonies than in dentate patients without CMDs. The treatment of CMDs through occlusal therapy decreases SP duration.
The Journal of craniofacial surgery 09/2010; 21(5):1641-5. · 0.81 Impact Factor
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ABSTRACT: The aim of this study was to assess the presence of temporomandibular joint (TMJ) noises in subjects with severe bone resorption, who have worn the same complete dentures for over 10 years, and 5 months after treatment with increments of acrylic resin on the occlusal surface after having new dentures in place.
After applying the research diagnostic criteria (RDC)/temporomandibular disorder (TMD) questionnaire, 20 asymptomatic subjects were assessed before and 5 months after the new dentures were put in place. Joint vibrations were assessed by the Sono Pak program by selecting the vibrations that occurred during the opening and closing cycle.
The means of the results revealed a nonnormal distribution and were submitted to Kruskal-Wallis statistical analysis (p < 0.05). The vibration means were of low intensity (< or =9.96 Hz). After rehabilitation, there was a reduction in the vibrations (< or =5.2 Hz) statistically significant only at the end of mouth opening with the old dentures when compared with the other cycles.
The intensity and number of occurrences of joint vibrations were reduced after 5 months of wearing new dentures.
Journal of Prosthodontics 08/2010; 19(6):438-42. · 1.01 Impact Factor
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ABSTRACT: This study assessed masticatory efficiency and duration of the masticatory cycle in 14 asymptomatic patients with severe bone resorption. All patients had worn complete dentures for over 10 years. Recall visits were scheduled at 5 months and 1 year after receiving new dentures.
Fourteen patients were evaluated in this study. The Research Diagnostic Criteria questionnaire and tests of the efficiency and duration of the masticatory cycle were performed with artificial food before, 5 months after, and 1 year after new dentures were delivered. Masticatory efficiency was assessed using a sieve system; artificial food was ground for 35 masticatory cycles and monitored by the operator.
Masticatory efficiency at 5 months was significantly improved for the 0.42-mm mesh. An improvement in masticatory efficiency and a reduction in mastication time were observed with the new dentures after 1 year.
The results of this study indicated that 5 months did not allow enough time to demonstrate improved muscular capacity and ability after receiving new dentures. After 1 year, the duration of the masticatory cycle was reduced, and masticatory efficiency was significantly improved.
Journal of Prosthodontics 09/2009; 19(1):10-3. · 1.01 Impact Factor
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ABSTRACT: Here, we present a case report on prosthetic reconstruction of posterior teeth and composite resin restoration of anterior teeth yielding considerable esthetic improvement, reestablishment of disocclusion guides and function.
The Bulletin of Tokyo Dental College 05/2009; 50(2):91-6.
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ABSTRACT: There has been much discussion regarding the ideal position of the condyle in the mandibular fossa. Although the centric relation position (CR) is used as a reference, some authors do not believe that it is physiologic. Thus, the aim of this study was to evaluate in a group of asymptomatic individuals the position of the condyle in the mandibular fossa at maximum intercuspation (MI), with a occlusal splint and with a Lucia jig between the teeth. It was analyzed by means of magnetic resonance imaging (MRI), transcranial radiography imaging and analysis of horizontal axis of rotation from casts mounted on an articulator. The results showed that even if patients had mandibular displacement in positions of CR, habitual maximum intercuspation and with the occlusal splint, confirmed by means of the analysis of the horizontal axis of rotation, the images showed no statistically significant differences among condylar positions. It can therefore be concluded that the positions analyzed were similar and that transcranial radiography seems to be a reliable method for analyzing condylar position.
Acta odontológica latinoamericana: AOL 01/2009; 22(3):155-62.
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ABSTRACT: Different factors like stress and occlusion can decrease the adaptive capacity of the stomatognathic system and lead to the occurrence of temporomandibular dysfunction (TMD). The objective of this study was to verify the relation of the variables socio-economic level, schooling, sex and age with the occurrence of temporomandibular dysfunction. The population of this study consisted of a statistically significant sample of subjects of both sexes belonging to different socio-economic classes living in the urban area of the city of Piacatu, São Paulo, Brazil. The Criterion of Economic Classification Brazil (CCEB) was used for the economic stratification of the population. Fonseca's Questionnaire was applied to samples collected from each extract to verify the level of TMD. The data collected were statistically analyzed using the Chi-square Test, with a significance level of 5%. In total, 354 heads of families participated in the research. No statistically significant relation was found between socio-economic class, schooling, age group and temporomandibular dysfunction (TMD). There was a relation between sex and TMD (p<0.02). The variables socio-economic class, schooling and age group had no influence upon the occurrence of TMD, however there is a significant relation with the sex of the individual.
Ciencia & saude coletiva 12/2008; 13 Suppl 2:2089-96.
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ABSTRACT: Occlusion is a predisposing factor for Temporomandibular Dysfunctions (TMD) of the joint, whose first sign and/or symptom is usually joint sound. To verify the effect of occlusion on joint sounds, temporomandibular joints (TMJ) were analyzed in 78 asymptomatic individuals with various dental conditions. Electrosonography was used to determine the intensity of the vibration in the temporomandibular joint (TMJ) on opening and closing the mouth. Transducers (piezoelectric accelerometer) were placed on the right and left joints. Results were tabled and analyzed using the Kruskal-Wallis test (a=0.05). It was concluded that TMJ vibration in partly edentulous individuals from Kennedy classes I, II and III is statistically higher than in dentate and fully edentulous subjects.
Acta odontológica latinoamericana: AOL 02/2008; 21(2):135-40.
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ABSTRACT: In order to evaluate the presence of TMD (temporomandibular disorder), dissatisfaction related to the use of removable partial dentures (RPD) and the effect of the treatment on temporomandibular joint noises, 13 female patients with Kennedy class I and II mandibular arch were selected. Another 13 young, asymptomatic, dentate patients, also female, were used as reference. After four years, 38.4% were found to have a moderate or severe degree of TMD. Over the four years, the degree of TMD increased in 46.15% of the patients, was not affected in 20.07%, while in 15.38% it decreased or the patients remained free from signs and symptoms. About 30% of the patients at the second year and 46% after the fourth year, had complaints regarding retention and stability. It was concluded that there is no relationship between TMD and the condition of partially edentulous Kennedy class I and II, but patient dissatisfaction increased after the second year and temporomandibular joint noise was reduced significantly with the replacement of the teeth.
Acta odontológica latinoamericana: AOL 02/2008; 21(1):21-7.
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ABSTRACT: The aim of this study was to assess the electrical activity of the masseter and anterior temporal muscles in subjects with severe bone resorption at two different times: (a) the initial period, with the complete dentures they had worn for over 10 years, and (b) the final period, 5 months after having new dentures put into place. Twelve asymptomatic subjects were asked to respond to the questionnaire, according to the research diagnostic criteria for temporomandibular disorders, before denture rehabilitation and 5 months after the new dentures were put in place. The electrical activity of the muscles was recorded during mastication in the initial and final period, using artificial food (Optocal). The operator monitored the 35 chewing cycles that were repeated to grind the artificial food. After wearing the new dentures for 5 months, the right anterior temporal muscle showed a statistical difference before and after denture rehabilitation at the beginning and end of mastication. Muscular capacity and ability reduced the electrical activity in the masseter muscles after rehabilitation.
Gerontology 02/2008; 54(3):138-43. · 2.78 Impact Factor
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ABSTRACT: The aim of this study was to assess the electrical activity of the masseter and anterior temporal muscles in patients with severe bone resorption, with complete dentures worn for over ten years, and five months after having new dentures put in place. The RDC questionnaire was applied to twelve asymptomatic patients, before and five months after new dentures were put in place. The electrical activity recordings were made in the mandibular position at rest, and during maximum tooth clenching. The electrical activity of the masseter and anterior temporal muscles in the position at rest presented no statistically significant difference after five months of wearing the new complete dentures. Electrical activity during tooth clenching exhibited a statistically significant reduction only in the right temporal muscle. A period longer than five months of wearing the new complete dentures is required for adaptation and the acquisition of functional capacity.
Acta odontológica latinoamericana: AOL 02/2007; 20(2):67-72.
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ABSTRACT: Objective: With the objective of studying the temporomandibular dysfunction and anxiety levels in children, an epidemiological study was accomplished in scholars of the fundamental teaching of private schools of the Municipal District of Jaboticabal/SP. Method: For this study, 304 students were selected, being 83 of the 4th series, 117 of the 6th series and 104 of the 8th series (Committee of Ethics in Research: 200501873). The sampling was composed by children of both gender, with age among of 9 to 15 years. The evaluation was done by means of three self-applicable questionnaires: one to quantify the degree of temporomandibular dysfunction (Index of Fonseca), and two to determine the anxiety level (IDATE): Anxiety-State (“As I am feeling”) and Anxiety-Trait (“Like me I generally feel”). The Anxiety-State questionnaire indicates as the children fells in a certain moment. The Anxiety-Trait questionnaire determines how the children generally fells during its lives. Results: The obtained data were tabulated and it allowed to arrive the following average scores of Index of Fonseca, Anxiety-State and Anxiety-Trait: 25.61 (13.25); 31.35 (5.03) and 38.61 (5.29), respectively. Conclusion: It was concluded that a great part of children’s of fundamental teaching showed signs and symptoms of TMD and presented themselves quite anxious. Besides, analysis of data showed that a positive correlation exists between temporomandibular dysfunction and anxiety (p<0.01), mainly when comparing Trace anxiety, which is strongly related with personality.
Pesquisa Brasileira em Odontopediatria e Clínica Integrada. 01/2007;
