BACKGROUND AND OBJECTIVES:Temporomandibular disorder is a collective term encompassing a wide range of clinical orofacial joint and muscle problems. The stomatognatic system is part of the postural system, so changes in one system may interfere with the other. This study aimed at observing whether there is change in jaw and head position before and after temporomandibular disorder treatment. METHODS: Participated in the study 16 volunteers, aged above 18 years, of both genders, who looked for assistance in the dentistry course clinic of a Public University, with diagnosis of temporomandibular disorder according to Diagnostic Criteria for Temporomandibular Disorder Research. Volunteers were submitted to X-rays (teleradiography with analysis of cephalometric points); posture in physiologic centric relation was evaluated by computerized photogrammetry and pain intensity was evaluated by the visual analog scale from zero to 10. Patients were evaluated before and after 8 weeks of treatment. RESULTS: Pain has decreased from 6.43±2.84 to 2.17±2.39, before and after treatment, respectively (p<0.05). Vertical head alignment, in initial angle, has changed from 21.84⁰±17.49⁰ to 11.38⁰±14.61⁰ (p<0.05). Jaw position has changed from A-NB (angle indicating mandible-jaw relationship in the anterior posterior direction): 4.95±2.52mm to A-NB: 4.64±2.52mm (p<0.05). CONCLUSION: Muscle temporomandibular disorder changes vertical head alignment and interferes with jaw position.
The internal derangement of the temporomandibular joint (TMJ) represents 8% of all cases of temporomandibular disorders (TMD) posing difficulties to establish an accurate diagnosis and treatment because of its low prevalence. This article presents the case of an 18-year-old Caucasian female patient who came to our Orofacial Pain and TMD Outpatient Service with complaints of intense pain on the right TMJ and limitation of mouth opening (maximum interincisal opening of 29 mm) with deviation to right, which she had been experiencing for the past 3 years. After a detailed clinical interview, a diagnosis hypothesis of nonreducing disc displacement with mouth opening limitation was established. The proposed treatment consisted of intra-joint infiltration with anesthetic in the right TMJ followed by jaw manipulation to recapture the articular disc, which was impeding the complete translation movement of the affected TMJ. After jaw manipulation, a new evaluation was done and showed the re-establishment of jaw dynamics with mouth opening and closing without deviation to the right side, clicking, opening limitation or pain. The patient was followed up at 6 months intervals. Two years after treatment, the patient was reevaluated and her mandibular range of motion without aid increased to 54 mm with no clicking, deviation to right, trismus or pain on the TMJ, indicating success of the treatment approach without recurrence of the pathology.
The purpose of this work was evaluating the fracture strength of bovine roots weakened experimentally, restored with two different techniques: internal reinforcement of root canal walls with composite resin and a cast metal post and core or anatomic post (glass fiber post associated with composite resin). Thirty bovine lower central incisive were selected and transversally sectioned, remaining 14 mm of root in order to approximate to the human maxillary central incisive. A sequence of standardized wear was used to weak the root until the walls remaining achieved from 0.5 to 0.7 mm of thickness at the cervical edge. Two groups were separated randomly (n=15) in order to test the roots reinforced with composite resin associated with cast metal post and core (CMP), or roots restored with composite resin associated to the glass fiber post (GFP). The test were applied in a Universal Test Machine (EMIC) with tangential compressive loading focused on the lingual face of core in an angle of 135° with the long axis of the tooth at a crosshead speed of 0.5 mm/min until failure occurred. The results showed that the fracture strength of remaining roots with weakened walls was influenced by the restorative technique, and the higher values of strength fractures were observed in the group of roots reinforced by composite resin associated with CMP (p<0.001) when compared to the group of roots restored with anatomic post.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.