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G Bai, C Yang, Y Qiu, M Chen
Open surgery and arthroscopy for the treatment of synovial chondromatosis (SC) of the temporomandibular joint (TMJ) have their advantages and disadvantages. The aim of this study was to report the application and results of the combined use of these two methods in the treatment of SC and the indications for use. A total of 36 patients with magnetic resonance imaging (MRI) confirmation of SC, treated from 2010 to 2015, were included. Patients with tumours in the upper articular cavity and with the extended margin of the medial groove still in-between the medial crest of the condyle and infratemporal space on coronal MRI were selected to undergo open surgery with the assistance of arthroscopy to clear the loose bodies and affected synovium...
October 18, 2016: International Journal of Oral and Maxillofacial Surgery
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
Satoshi Kushida, Natsuko Kakudo, Kenji Kusumoto
INTRODUCTION: In patients with habitual dislocation of the temporomandibular joint, anterior dislocation readily occurs with mouth opening in the normal range. METHODS: This short paper describes our novel procedure, modified zygomatic arch osteotomy reported by LeClerc et al., with oblique osteotomy to create a V-shaped notch at the tip for more accurate locking. CONCLUSION: The technique obtained favorable results without the recurrence of TMJ dislocation...
September 2016: Journal of Maxillofacial and Oral Surgery
K Rajkumar, P Mukhopadhyay, Ramen Sinha
PURPOSE: The study assessed the efficacy of orthopedic suture anchor as a modified suture anchor for disc repositioning in case of a closed lock of TMJ. PATIENT AND METHODS: Disc repositioning was undertaken via a mini preauricular approach. The disc was repositioned on the surface of the condyle and stabilized using an orthopedic suture anchor. Postoperatively functional outcomes were assessed in terms of reduction in pain, joint movement and absence of joint noise and clicking sounds...
September 2016: Journal of Maxillofacial and Oral Surgery
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
Gregory J Wright, Matthew C Coombs, R Glenn Hepfer, Brooke J Damon, Thierry H Bacro, Michael K Lecholop, Elizabeth H Slate, Hai Yao
Approximately 30% of temporomandibular joint (TMJ) disorders include degenerative changes to the articular disc, with sex-specific differences in prevalence and severity. Limited tensile biomechanical properties of human TMJ discs have been reported. Stress relaxation tests were conducted on TMJ disc specimens harvested bilaterally from six males and six females (68.9±7.9 years), with step-strain increments of 5%, 10%, 15%, 20% and 30%, at 1% strain-per-second. Stress versus strain plots were constructed, and Young׳s Modulus, Instantaneous Modulus and Relaxed Modulus were determined...
October 6, 2016: Journal of Biomechanics
Hirotaka Muraoka, Takashi Kaneda, Yusuke Kawashima, Naohisa Hirahara, Taiga Fukuda, Teruaki Muramatsu, Kotaro Ito
PURPOSE: Lymphadenopathy often occurs in the setting of inflammation, with or without infection. We sought to elucidate any association of parotid lymphadenopathy with joint effusion in temporomandibular joint (TMJ) disorders. MATERIALS AND METHODS: We performed a retrospective cohort study. We analyzed the magnetic resonance imaging studies of patients with suspected TMJ disorders performed from April 2006 to March 2007. The degree of joint effusion was graded on sagittal T2-weighted spin echo images according to a commonly used system...
September 17, 2016: Journal of Oral and Maxillofacial Surgery
J Levorova, V Machon, A Guha, R Foltan
Septic arthritis of the temporomandibular joint (TMJ) is an unusual disease in adults. Inoculation of the pathogen may occur through traumatic or iatrogenic injuries, or more often by haematogenous spread from a distant focus. The cause of infection is unknown in most cases. A case of ostensibly mild septic arthritis of the TMJ with a good response to antibiotic therapy and lavage, but that finally led to fatal destruction of the joint structures in a 38-year-old female patient, is reported herein. The infection was caused by Raoultella ornithinolytica - a rare bacterial species in humans, which has not been reported previously in any patients with joint problems...
October 7, 2016: International Journal of Oral and Maxillofacial Surgery
Feiyu Wang, Yuhuan Sun, Dongmei He, Lizhen Wang
PURPOSE: To explore the potential use of concentrated growth factor (CGF) in the treatment of temporomandibular joint osteoarthritis (TMJ-OA). MATERIALS AND METHODS: Surgical defects were created bilaterally on the condylar cartilage and bone to induce TMJ-OA in goats. CGF was applied to the right joints (CGF group) and physiologic saline was applied to the left joints (unrepaired group). There was a 1-month period of observation after the operation. These joint specimens were evaluated and compared based on gross appearance and histopathologic observations with hematoxylin and eosin (HE)...
September 15, 2016: Journal of Oral and Maxillofacial Surgery
Mildred C Embree, Mo Chen, Serhiy Pylawka, Danielle Kong, George M Iwaoka, Ivo Kalajzic, Hai Yao, Chancheng Shi, Dongming Sun, Tzong-Jen Sheu, David A Koslovsky, Alia Koch, Jeremy J Mao
Tissue regeneration using stem cell-based transplantation faces many hurdles. Alternatively, therapeutically exploiting endogenous stem cells to regenerate injured or diseased tissue may circumvent these challenges. Here we show resident fibrocartilage stem cells (FCSCs) can be used to regenerate and repair cartilage. We identify FCSCs residing within the superficial zone niche in the temporomandibular joint (TMJ) condyle. A single FCSC spontaneously generates a cartilage anlage, remodels into bone and organizes a haematopoietic microenvironment...
October 10, 2016: Nature Communications
Gaetano Isola, Luca Ramaglia, Giancarlo Cordasco, Alessandra Lucchese, Luca Fiorillo, Giovanni Matarese
BACKGROUND: Patients affected by Juvenile Idiopathic Arthritis (JIA) may have several craniofacial growth disturbances and involvements at the temporomandibular joint (TMJ). The objectives of the present study were to evaluate the clinical effectiveness of functional therapy used to reduce asymmetry of mandibular growth and TMJ disorder in patients with JIA. METHODS: By a retrospective longitudinal design, a cohort of 54 patients with JIA (mean age, 13.2 ± 3.7 years; range, 5-17...
September 13, 2016: Minerva Stomatologica
Poornima Patel, Faisal Idrees, Vilas Newaskar, Deepak Agrawal
BACKGROUND: Internal derangement of the temporomandibular joint (TMJ) is one of the most common forms of temporomandibular disorders. The minimally invasive treatments such as arthrocentesis as well as arthroscopic lysis and lavage are often used as a first-line surgical treatment or in conjunction with nonsurgical modalities with low morbidity and high efficacy. Sodium hyaluronate (SH) has been proposed as an alternative therapeutic agent with similar therapeutic effects. OBJECTIVE: A prospective study was carried out for evaluation of efficacy of TMJ arthrocentesis with and without injection of SH in management of internal derangements...
October 6, 2016: Oral and Maxillofacial Surgery
Ruo-Han Ma, Shuang Yin, Gang Li
The purpose of this review was to evaluate whether cone-beam computed tomography (CBCT) is reliable for the detection of bone changes of the temporomandibular joint (TMJ). Studies collected from the PubMed, Web of Science, Cochrane Library, ScienceDirect, Embase, Wanfang and CNKI databases were searched, and the publishing time was limited from January 1990 to December 2015. Eight studies (23 experimental research groups) were eventually included for further analysis. The pooled sensitivity was 0.67 and the pooled specificity was 0...
October 6, 2016: Scientific Reports
Felix P Kuhn, Georg Spinner, Filippo Del Grande, Michael Wyss, Marco Piccirelli, Stefan Erni, Pascal Pfister, Michael Ho, Bert-Ram Sah, Lukas Filli, Dominik A Ettlin, Luigi M Gallo, Gustav Andreisek, Andrei Manoliu
OBJECTIVES: To qualitatively and quantitatively compare MR imaging of the temporomandibular joint (TMJ) at 7.0 T using high-permittivity dielectric pads and 3.0 T using a clinical high-resolution protocol. METHODS: IRB approved study with written informed consent. 12 asymptomatic volunteers were imaged at 7.0T and 3.0T using 32-channel head coils. High-permittivity dielectric pads consisting of barium titanate in deuterated suspension were used for imaging at 7...
October 5, 2016: Dento Maxillo Facial Radiology
Ashkan Aryaei, Natalia Vapniarsky, Jerry C Hu, Kyriacos A Athanasiou
Temporomandibular disorders (TMDs) are among the most common maxillofacial complaints and a major cause of orofacial pain. Although current treatments provide short- and long-term relief, alternative tissue engineering solutions are in great demand. Particularly, the development of strategies, providing long-term resolution of TMD to help patients regain normal function, is a high priority. An absolute prerequisite of tissue engineering is to understand normal structure and function. The current knowledge of anatomical, mechanical, and biochemical characteristics of the temporomandibular joint (TMJ) and associated tissues will be discussed, followed by a brief description of current TMD treatments...
October 4, 2016: Current Osteoporosis Reports
M Marqués-Mateo, M Puche-Torres, M-E Iglesias-Gimilio
The temporomandibular joint (TMJ) dislocation can be categorised into three groups: acute, habitual or recurrent and long-standing. The long-standing or protracted lower jaw dislocation refers to a condition that persists for more than one month without reduction. There are a great variety of methods for its treatment, from the manual or non-surgical, to surgical ones like the indirect approach (conservative surgical approach) and direct approach (open joint). Additional procedures in unsuccessful cases may include extra-articular orthognathic techniques to correct a malocclusion until joint replacement...
October 1, 2016: Medicina Oral, Patología Oral y Cirugía Bucal
R Leonardi, R-E Perrotta, L-E Almeida, C Loreto, G Musumeci
To understand the molecular basis of temporomandibular joint (TMJ) pathologies, we aimed to investigate the lubricin levels in the TMJ synovial fluid (SF) of patients with mild to severe internal derangements (IDs)._Material and Methods: A total, 34 joints were the study group. Only patients, with a Wilkes stage of III, IV and V were included, in this sample. Control group consisted of SF from eight joints, from patients undergoing to orthognatic surgery. Concentrations of lubricin in the SF from both samples were measured using ELISA system...
October 1, 2016: Medicina Oral, Patología Oral y Cirugía Bucal
Ross Elledge, Jason Green, Alan Attard
Surgery of the temporomandibular joint (TMJ) is increasingly recognised as a subspecialist area of interest within our specialty and many procedures such as arthroscopy, arthroplasty, and replacement of the TMJ are becoming increasingly centralised and restricted to certain regions. We previously made a national survey of trainees and have sought to augment this with a survey of trainers to find out the nature of practice and patterns of referral nationally. We have also examined the consultants' expectations of competent final-year trainees...
September 26, 2016: British Journal of Oral & Maxillofacial Surgery
Luana Goés Soares, Igor Reali Costa, Jadimar Dos Santos Brum Júnior, Wyllerson Silveira Bronzon Cerqueira, Evandro Silveira de Oliveira, Dhelfeson Willya Douglas de Oliveira, Patricia Furtado Gonçalves, José Cristiano Ramos Glória, Karine Tais Aguiar Tavano, Olga Dumont Flecha
OBJECTIVE: The aim of this study was to determine the prevalence of bruxism in students at the Federal University of the Jequitinhonha and Mucuri Valleys in Brazil. The secondary objectives were to identify the factors associated with bruxism; prevalence of dental wear; and to distinguish the signs and symptoms of temporomandibular dysfunction when present, and verify its relationship with bruxism. METHODS: Two hundred fifty-three students (106 males, 147 females) were clinically examined and answered a questionnaire...
August 12, 2016: Cranio: the Journal of Craniomandibular Practice
Alp Saruhanoğlu, Bilge Gökçen-Röhlig, Ceren Saruhanoğlu, Değer Öngül, Meltem Koray
OBJECTIVE: The current study aimed to investigate the frequency of signs and symptoms of temporomandibular disorders (TMD) among call center employees. METHODS: Workers from four call centers (CC) were invited to participate in this study. The examination was based on the Research Diagnostic Criteria for Temporomandibular Disorder (RDC/TMD). The tenderness of the masticator muscles was assessed on both sides by bilateral palpation. The mobility of the mandible was measured with a plastic millimeter ruler on opening, lateral excursions, and protrusion...
August 16, 2016: Cranio: the Journal of Craniomandibular Practice
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