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Variable presentation of temporalis hypertrophy--A case report with literature review.

A case of painful, initially bilateral, and then unilateral temporalis hypertrophy in a 33-year-old Caucasian woman is presented in a primary care setting; the aetiology of the hypertrophy was considered reactive in nature. Medical and supportive treatment was successful in providing symptomatic relief. Further treatment including an intramuscular botulinum injection was considered by the patient with a view to reduction of the chronic enlargement of her temporalis and masseter musculature. A review of the literature and previous treatment regimes is also presented.

Adrenergic Uptake Inhibitors↗

Jig relief.

Explore the source record for details and available documents.

Dental Prosthesis Design↗

Assessment of buccal separators in the relief of bruxist activity associated with myofascial pain-dysfunction.

The purpose of this study was to evaluate the effectiveness of heavy (S2) Alastik separators in relieving bruxist activity as monitored through masseter muscle area EMG activity, muscle palpation, and self-reporting in 21 Caucasian subjects. The subjects, all of whom suffered from both bruxism and myofascial pain-dysfunction, were randomly assigned to one of three groups: experimental (separator group); placebo (separator placed and removed); and control groups (no separator). The findings from this study indicate that there were no observable differences in either subjective or objective responses to the pretreatment versus posttreatment questionnaire and clinical examination for tooth clenching or grinding, facial pain, and fatigue of the jaws. In addition, no statistical differences were found between pre and posttreatment data. The EMG data did not show any statistical differences between pretreatment and posttreatment evaluations or among the 3 groups.

Adult↗

Surgical-orthodontic management of persistent closed lock of the TM joints.

Surgical management of internal derangement in the temporomandibular joint traditionally involves disk repair or removal. Disks are often replaced with various types of autogenous, allogenic or alloplastic materials. The failure rates for such replacements are estimated at 10% to 20%. Current thinking suggests that permanent alloplastic interpositional grafts should be avoided. The following report describes the orthodontic/orthognathic surgical management of a patient with bilateral Silastic fossa implants.

Adult↗

Lip adaptation to simulated dental arch expansion. Part 1: Reliability and precision of two lip pressure measurement mechanisms.

Understanding the influence of lip and tongue pressure on tooth position requires a reliable method of measuring pressure. A transducer with a beam mechanism has been used extensively in the past. A transducer with a diaphragm mechanism has been recently introduced. Comparative in-vivo tests of these transducers have not been published. The purpose of this study was to investigate transducer reliability and precision. Transducers were placed intraorally in 22 subjects, and two lip pressure measurements were recorded. Paired t-tests and interclass correlations were used to evaluate repeatability and reliability. The error of the method was analyzed for each transducer type. Both transducer types produced measurements that were repeatable and reliable. The error was smaller for the diaphragm transducer. The diaphragm transducer is more precise.

Adaptation, Physiological↗

Long-term stability of mandibular orthopedic repositioning.

Mandibular anterior repositioning appliances attempt to diminish temporomandibular joint pain, soft tissue noise, and myofascial discomfort by altering condyle-disc relationships. Secondary stabilization of the occlusion to this arbitrary anterior position through orthodontic tooth movement may significantly alter functional and muscular relationships. A case report is illustrated to show that as the functional environment attempted to reestablish equilibrium through adaptation, relapse occurred as the condyles "seated" posteriorly and superiorly toward their original relationship within the fossa. For all practical purposes, complete relapse of the orthodontic treatment result took place over time.

Adaptation, Physiological↗

Case report: treatment for a patient with a history of TMJ disorder.

Establishing a knowledge-based protocol for the treatment of orthodontic patients who report a history of temporomandibular dysfunction can alert the practitioner to potential treatment pitfalls before they happen. While the joints can be extremely adaptive, some individuals are subject to painful and/or limited function. Others have acquired condylar positions that, if not recognized, could lead to serious alterations in the original treatment plan. Combining a thorough diagnostic protocol with a therapeutic regimen that seeks to establish a stable condylar and occlusal position-prior to initiating treatment- is essential.

Adult↗

Obstructive sleep apnea patients with the oral appliance experience pharyngeal size and shape changes in three dimensions.

Pharyngeal size and shape differences between pre- and posttrials of a mandible-protruding oral appliance were investigated using cine computerized tomography (CT). Fourteen patients diagnosed with obstructive sleep apnea whose apnea-hypopnea index was higher than 5 and arousal index higher than 20 underwent a second overnight sleep study to evaluate the effectiveness of the oral appliance. Three-dimensional changes in pharyngeal shape measured on cross-sectional CT images during two respiratory cycles after oral appliance delivery were estimated by three variables: (1) lateral dimension, (2) anterior-posterior dimension, and (3) cross-sectional area at five vertical levels. Apnea indices improved significantly when the appliance was used. During apnea, measurements at retropalatal and retroglossal levels decreased most. However, the cross-sectional area of these levels appeared to increase significantly (P < .05) with the appliance in place during wakefulness. The oral appliance appears to enlarge the pharynx to a greater degree in the lateral than in the sagittal plane at the retropalatal and retroglossal levels of the pharynx, suggesting a mechanism for the effectiveness of oral appliances that protrude the mandible.

Cephalometry↗

The effect of posterior tooth guidance on non-working side arbitrary condylar point movement.

Occlusal form is frequently modified in clinical practice and yet we do not have detailed knowledge of the possible effects of these changes on condylar movement. The aim of this study was to quantify the effects of an alteration in the occlusion on condylar movement during a lateral excursive jaw movement. Posterior tooth guidances (i.e. metal overlays) were attached to both maxillary first molars. The movement of arbitrary condylar points on the non-working side was recorded in seven subjects during lateral excursion under natural tooth guidance (control) and was compared with that after placement of the overlays (guidance). The guidance resulted in statistically significant changes to the displacement of the arbitrary condylar points on the non-working side. For example, at a standardized (3 mm) displacement along the mid-incisor point trajectory during the lateral excursion for both control and guidance in all subjects, the corresponding displacements of the condylar points were statistically significantly decreased under the guidance situation in comparison with the control situation. These data suggest that, for the same magnitude of mandibular displacement during lateral excursion, the introduction of a posterior tooth guidance limits condylar displacement on the non-working side.

Adult↗

Outcome of therapy in the conservative management of temporomandibular pain dysfunction disorder.

The present study considered predictors of the outcome of treatment for temporomandibular pain dysfunction disorder (TMPD). Thirty-seven patients were assessed with objective and self-report measures of physiological and psychosocial aspects of this disorder at initial assessment and at 6-month follow-up subsequent to conservative physical therapy. Patients were subdivided into slow and rapid responders to conservative physical therapy based on self-reported level of improvement. Measures employed included the Temporomandibular Pain Dysfunction Disorder Questionnaire and the Temporomandibular Pain Dysfunction Disorder Clinical Form. Eighty-one per cent of patients showed a 50% or greater improvement in pain severity at follow-up, with minimal differential changes across the two groups found in the physiological symptoms, while the rapid responding group showed greater improvement in terms of psychosocial factors. These findings indicated that psychosocial factors, particularly coping strategies and illness behaviour, cannot be ignored in the management of TMPD.

Adaptation, Psychological↗

Effects of stabilization appliances on nocturnal parafunctional activities in patients with and without signs of temporomandibular disorders.

This study was designed to investigate the short-term effects of stabilization appliances on parafunctional oral motor behaviour (bruxing and clenching) during sleep in patients with and without signs of temporomandibular disorders (TMD). Results revealed that stabilization appliances do not stop nocturnal parafunctional activities in both groups of patients. Active wear facets on the guide ramps of appliances were created by bilateral mandibular excursions. The extension of these facets indicate that the mandible moves laterally far beyond the edge-to-edge contact relationship of the canines during eccentric bruxism. Results also indicate that, with the exception of temporomandibular joint (TMJ) clicks, stabilization appliance therapy is effective in eliminating the signs of TMD evaluated.

Adult↗

Therapeutic outcome assessment in permanent temporomandibular joint disc displacement.

In permanent temporomandibular disc displacement (TMJ-DD) outcome studies many authors claim positive effects of arthroscopic surgery, arthrocentesis and physical therapy. This literature review was undertaken to analyse whether the claimed effects are based on acceptable methodology. The recorded papers were analysed by two independent observers according to (1) method of investigation, (2) therapeutic intervention studied, (3) therapeutic outcome variables used, and (4) claimed effectiveness of the intervention. Agreement between observers was calculated. Twenty-four papers were found in which therapeutic outcome of interventions on temporomandibular disorders were studied. Six studies applied a true experimental design. Each of these six studies compared a different set of interventions. Twenty-two papers used maximal mouth opening (MMO) as an outcome variable, nine studied pain intensity on a visual analogue scale, one paper assessed the mandibular function impairment questionnaire. Kappa for overall agreement concerning the reviewing criteria was 0.82 (P < or = 0.001). No distinguishing effects on MMO, pain or function impairment were reported between arthroscopic surgery, arthrocentesis and physical therapy. Results of methodological sound outcome studies evaluating the effects of arthroscopic surgery, arthrocentesis and physical therapy are needed.

Arthroscopy↗