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Tmj displacement

Mohammed A Q Al-Saleh, Noura A Alsufyani, Manuel Lagravere, Brian Nebbe, Hollis Lai, Jacob L Jaremko, Paul W Major
OBJECTIVE: To evaluate the effect of magnetic resonance imaging-cone beam computed tomography (MRI-CBCT) image registration on inter- and intraexaminer consistency when evaluating temporomandibular joint (TMJ) internal derangement compared to MRI alone. METHODS: MRI and CBCT images of 25 patients (50 TMJs) were obtained and coregistered using mutual-information rigid image registration via Mirada XD software. Two experienced radiologists independently and blindly evaluated two types of images (MRI alone and MRI-CBCT registered images) at two different times (T1 and T2) for TMJ internal derangement, based on sagittal and coronal articular disc position in relation to the head of the condyle and the posterior slope of the articular eminence...
November 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Sho Kayumi, Yoshiyuki Takayama, Atsuro Yokoyama, Nana Ueda
BACKGROUND: The purpose of this study was to investigate the influence of occlusal forces (the contractile force of masticatory muscles) exerted during occlusal adjustment on the distribution of the forces among teeth, implants, and temporomandibular joints (TMJs) in intercuspal clenching in cases with bilateral missing molars and premolars by using finite element analysis. METHODS: A three-dimensional finite element model of the mandible with eight implants in the premolar and molar regions was constructed...
December 2015: Int J Implant Dent
Ying Kai Hu, Chi Yang, Qian Yang Xie
Treatment procedures for anterior disc displacement (ADD) of temporomandibular joint (TMJ) are far from reaching a consensus. The aim of the study was to evaluate disc status changes of anterior disc displacement with reduction (ADDWR) and without reduction (ADDWoR) comparatively, to get a better understanding of the disease progress without intervention. This longitudinal retrospective study included 217 joints in 165 patients, which were divided into ADDWR group and ADDWoR group based on magnetic resonance imaging (MRI) examination...
September 27, 2016: Scientific Reports
Sven E Widmalm, Yan Dong, Boxiu Li, Min Lin, LiJie Fan, Simin Deng
The aim was to study the characteristics of lateral mandibular horizontal deviations during opening-closing movements and their association with TMJ sounds of the clicking type. Subjects were 28 healthy volunteers and 38 patients diagnosed with MRI imaging as having TMJ disc dysfunction, 22 with disk displacement without (DD) and 16 as having disc displacement with reduction (DDR). TMJ sounds were recorded with miniature microphones placed in the ear canals, and jaw movements were documented with a kinesiograph...
September 26, 2016: Journal of Oral Rehabilitation
Hp Li, Sf Sun, Bt Fan, P Shen, Js Zheng, Sy Zhang
We evaluated the effects of chitosan membrane, a highly absorbable and viscous material, in the prevention of intra-articular adhesions after anchoring of the disc in the temporomandibular joints (TMJ) of six adult goats (12 joints). To simulate anterior displacement of the disc and TMJ trauma, we cut off the retrodiscal attachment and damaged the surface of the condylar bone, then randomly divided the goats into two groups: the control group (n=2) and the experimental group (n=4). In the experimental group we covered the condylar surfaces on both sides of the animals with chitosan membranes...
September 20, 2016: British Journal of Oral & Maxillofacial Surgery
Shehryar N Khawaja, Heidi Crow, Ruba F G Mahmoud, Krishnan Kartha, Yoly Gonzalez
PURPOSE: The literature on joint effusion (JE) and its association with clinical and radiologic variables in patients with temporomandibular disorders (TMDs) is inconsistent and is characterized by multiple methodologic limitations. The primary aim of this investigation was to evaluate the association between magnetic resonance imaging (MRI) identified JE and temporomandibular joint (TMJ) arthralgia. The secondary aim of this investigation was to determine the association between JE and other clinical and MRI-identified soft tissue characteristics...
August 29, 2016: Journal of Oral and Maxillofacial Surgery
F Xu, L Jiang, C Man
Two different surgical methods for the treatment of unilateral traumatic temporomandibular joint (TMJ) ankylosis with a medially displaced residual condyle are described. Eighteen patients with unilateral traumatic TMJ ankylosis and a medially displaced residual condyle, treated between 2008 and 2013, were included in this study. Group A patients (n=10) were treated with an autogenous coronoid process graft (ACPG) for reconstruction of the mandibular condyle, while group B patients (n=8) were treated by lateral arthroplasty (LAP); a temporalis myofascial flap (TMF) was used as interpositional material in both groups...
September 19, 2016: International Journal of Oral and Maxillofacial Surgery
Arunangshu Chakraborty, Taniya Datta, Dayananda Lingegowda, Rakhi Khemka
Temporomandibular joint (TMJ) pain can be difficult to diagnose and treat. We describe a patient with left jaw pain after right hemimandibulectomy. The patient was initially managed conservatively, which failed to reduce pain. He was then administered inferior alveolar nerve block and TMJ injection with steroid and local anesthetic. These injections provided temporary pain relief that lasted approximately 1 month and the pain recurred. Computed tomography scan showed lateral displacement of left mandibular condyle...
September 7, 2016: A & A Case Reports
Jae Young Jang, Jeong Seung Kwon, Debora H Lee, Jung Hee Bae, Seong Taek Kim
PURPOSE: Most of the reports on instrumentalists' experiences of temporomandibular disorders (TMD) have been reported not by clinical examinations but by subjective questionnaires. The aim of this study was to investigate the clinical signs and subjective symptoms of TMD in a large number of instrumentalists objectively. MATERIALS AND METHODS: A total of 739 musicians from a diverse range of instrument groups completed a TMD questionnaire. Among those who reported at least one symptom of TMD, 71 volunteers underwent clinical examinations and radiography for diag-nosis...
November 2016: Yonsei Medical Journal
Ying-Kai Hu, Chi Yang, Xie-Yi Cai, Qian-Yang Xie
The aim of the study was to compare condylar height changes of anterior disc displacement with reduction (ADDwR) and anterior disc displacement without reduction (ADDwoR) in temporomandibular joint (TMJ) quantitatively, to get a better understanding of the changes in condylar height of patients with anterior disc displacement who had received no treatment, and to provide useful information for treatment protocol. This longitudinal retrospective study enrolled 206 joints in 156 patients, which were divided into ADDWR group and ADDwoR group based on magnetic resonance imaging examination...
August 2016: Medicine (Baltimore)
Ephraim R Rikhotso, Muhammad A Bobat
Traumatic dislocation of the mandibular condyle into the middle cranial fossa is an extremely rare complication of maxillofacial injury. The rarity of this injury has led researchers to propose a set of anatomic features that might explain this injury. These features include a small rounded condylar head, hyper-pneumatization of the temporal bone, a thin roof over the glenoid fossa, and missing posterior teeth. The greatest risk factor for this injury is a blow to the chin when the mouth is open without fracture of the condyle (and therefore no dissipation of the forces)...
July 30, 2016: Journal of Oral and Maxillofacial Surgery
Salih Onur Basat, Mehmet Surmeli, Oguzhan Demirel, Fatih Ceran, Funda Akoz Saydam, Karaca Basaran
Temporomandibular joint disorders (TMJDs) are a complex group of disorders that comprise dysfunctions of the temporomandibular joint (TMJ). In this study, we analyzed the objective and subjective findings of the TMJD patients by using Helkimo anamnesis (Ai) and clinical dysfunction (Di) indices, and tried to document a relation between these findings and magnetic resonance imaging (MRI) results.Ninety-eight patients who were admitted to our clinic were included in the study. The clinical evaluation was performed by using Ai, an 8-question-survey based on the objective symptoms of patients; Di, concluded as the score of 5 objective measurements of physical examination...
August 24, 2016: Journal of Craniofacial Surgery
F Cheynet
The study of the relationship between temporomandibular joints (TMJ), mastication and ventilation and the involvement of these two functions in the genesis of primary Temporomandibular Disorders (TMD) and in some dentofacial deformities, was initiated in France, more than 30years, by Professor Raymond Gola. Once criticized the weakness of the scientific literature in this domain, the originality of the TMJ within the masticatory system is recalled with its huge adaptation potential to very different biomechanical constraints according to the age and masticatory activities during the day...
September 2016: Revue de Stomatologie, de Chirurgie Maxillo-faciale et de Chirurgie Orale
J Gagé, A Gallucci, M Arnaud, C Chossegros, J M Foletti
INTRODUCTION: Temporomandibular disorders (TMDs) affect the masticatory muscles and the temporomandibular joints (TMJs). TMDs most often result from occlusal and/or muscular disorders and are then called primary or idiopathic TMDs. Less frequently, TMDs are related to local (trauma, infection) or general (rheumatoid arthritis) causes and are then called secondary TMDs. A little known iatrogenic cause of secondary TDM is the osteoarthritis that may be induced by intra-articular cortisone injections...
September 2016: Revue de Stomatologie, de Chirurgie Maxillo-faciale et de Chirurgie Orale
Ayça Dilara Yilmaz, Duygu Yazicioğlu, Mine Aysegul Tuzuner Oncul, Gülden Ereş, Nejat Bora Sayan
AIMS: Temporomandibular joint internal derangement (TMJ ID) is a multifactorial complex disease characterised by articular disc degeneration. Matrilin-3 is a cartilage and bone-specific adaptor protein, and amino-acid substitutions in the protein are associated with skeletal diseases and joint disorders. We aimed to detect the variants of Matrilin-3 gene (MATN3) in a TMJ ID case-control group and to investigate the risk association of the detected variants with TMJ ID. MATERIALS AND METHODS: A case control study was conducted consisting of 57 unrelated TMJ ID patients (32...
October 2016: Genetic Testing and Molecular Biomarkers
Alice E Goodman, Daniel T Carmichael
Maxillofacial trauma in cats often results in mandibular symphyseal separation in addition to injuries of the caudal mandible and/or temporomandibular joint (TMJ). Caudal mandibular and TMJ injuries are difficult to access and stabilize using direct fixation techniques, thus indirect fixation is commonly employed. The immediate goals of fixation include stabilization for return to normal occlusion and function with the long-term objective of bony union. Indirect fixation techniques commonly used for stabilization of caudal mandibular and temporomandibular joint fracture/luxation include maxillomandibular fixation (MMF) with acrylic composite, interarcade wiring, tape muzzles, and the bignathic encircling and retaining device (BEARD) technique...
March 2016: Journal of Veterinary Dentistry
Yohei Kumazaki, Shigehisa Kawakami, Atsutoshi Hirata, Kazuhiro Oki, Shogo Minagi
AIMS: To assess the influence of clenching side and location (ie, tooth) on the bite force necessary to induce pain or discomfort in patients with unilateral anterior disc displacement (ADD) of the temporomandibular joint (TMJ). METHODS: A total of 17 patients with unilateral ADD diagnosed clinically and with magnetic resonance imaging were included. A bite force meter was positioned at each of four experimental positions: the mandibular first premolars and first molars, bilaterally...
2016: Journal of Oral & Facial Pain and Headache
M J Wu, H P Lu, Z Y Gu, Y Q Zhou
Abnormal pressure is an important factor that contributes to bone adaptation in the temporomandibular joint (TMJ). We determined the effect of the mitogen-activated protein kinases (MAPK) pathway on the pressure-induced synovial metaplasia procedure for the TMJ, both in vitro and in vivo. Synovial fibroblasts (SFs) were exacted from rat TMJs and exposed to different hydrostatic pressures. The protein extracts were analyzed to determine the activation of ERK1/2, JNK, and p38. Surgical anterior disc displacement (ADD) was also performed on Japanese rabbits, and the proteins of TMJ were isolated to analyze pressure-induced MAPK activation after 1, 2, 4, and 8 weeks...
2016: Genetics and Molecular Research: GMR
Shinnosuke Nogami, Kensuke Yamauchi, Norihisa Satomi, Yoshihiro Yamaguchi, Sou Yokota, Yoko Abe, Tetsu Takahashi
OBJECTIVE: The aim of the present study was to identify the risk factors for aggressive condylar resorption (ACR) after orthognathic surgery. METHODS: A total of 25 female patients with osteoarthritis (OA) scheduled for orthognathic surgery were divided into two groups: those who exhibited ACR (ACR (+), n = 8) and those who did not exhibit ACR (ACR (-), n = 17) after surgery. Clinical indices were used to determine the extent of mandibular advancement, the presence of temporomandibular disorder (TMD), and relevant medical treatment histories (including the use of oral contraceptive (OC) medication...
June 30, 2016: Cranio: the Journal of Craniomandibular Practice
Gabriel Pires Pastore, Douglas Rangel Goulart, Patrícia Radaic Pastore, Alexandre Javaroni Prati
The diagnosis of synovial chrondromatosis of temporomandibular joint (TMJ) requires a combined assessment consisting of clinical, radiologic, and histopathologic examinations. The purpose of this study is to report in 1 patient the removal of a single large cartilaginous nodule floating in the upper joint compartment using arthroscopy. A 30-year-old woman was referred to our department complaining about pain in preauricular area and restricted mouth opening. Imaging of magnetic resonance reveals anterior disc displacement and right joint effusion...
June 2016: Journal of Craniofacial Surgery
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