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Implant. Temporomandibular joint

R Boeddinghaus, A Whyte
Maxillofacial imaging encompasses radiology of the teeth and jaws, including the temporomandibular joints. Modalities used include intra-oral radiographs, panoramic tomography, cephalograms, cone-beam computed tomography, computed tomography, magnetic resonance imaging, ultrasound, and radionuclide imaging. Common indications for imaging are impacted and supernumerary teeth, dental implants, inflammatory dental disease, and fibro-osseous lesions, cysts, and masses of the jaws. Osteonecrosis of the jaws may follow radiotherapy or the use of bisphosphonates and other drugs...
March 21, 2017: Clinical Radiology
David Faustino Ângelo, Florencio Gil Monje, Raúl González-García, Christopher B Little, Lisete Mónico, Mário Pinho, Fábio Abade Santos, Belmira Carrapiço, Sandra Cavaco Gonçalves, Pedro Morouço, Nuno Alves, Carla Moura, Yadong Wang, Eric Jeffries, Jin Gao, Rita Sousa, Lia Lucas Neto, Daniel Caldeira, Francisco Salvado
BACKGROUND: Preclinical trials are essential to test efficacious options to substitute the temporomandibular joint (TMJ) disk. The contemporary absence of an ideal treatment for patients with severe TMJ disorders can be related to difficulties concerning the appropriate study design to conduct preclinical trials in the TMJ field. These difficulties can be associated with the use of heterogeneous animal models, the use of the contralateral TMJ as control, the absence of rigorous randomized controlled preclinical trials with blinded outcomes assessors, and difficulties involving multidisciplinary teams...
March 2, 2017: JMIR Research Protocols
David C Ackland, Dale Robinson, Michael Redhead, Peter Vee Sin Lee, Adrian Moskaljuk, George Dimitroulis
Personalized prosthetic joint replacements have important applications in cases of complex bone and joint conditions where the shape and size of off-the-shelf components may not be adequate. The objective of this study was to design, test and fabricate a personalized 3D-printed prosthesis for a patient requiring total joint replacement surgery of the temporomandibular joint (TMJ). The new 'Melbourne' prosthetic TMJ design featured a condylar component sized specifically to the patient and fixation screw positions that avoid potential intra-operative damage to the mandibular nerve...
February 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
M Dincel, H Kocaağaoğlu, H Ö Gümüş, H Albayrak
This case report presents the prosthodontic rehabilitation of a patient with a resected right mandible, caused by an accident. Right condyle, ramus, and the posterior part of ramus were affected by the accident. These structures were resected, and the mandible was positioned toward the surgical area and a facial asymmetry was occurred. The patient was treated with a bar-retained maxillar denture with a guide ramp and an implant-supported fixed mandibular prosthesis.
February 2017: Nigerian Journal of Clinical Practice
Emma Brown, Mark H Wilson, Peter Revington
We present a case of a man aged 20 years who was referred with the inability to open his mouth as a consequence of severe ankylosis of his temporomandibular joint. He had previously undergone an attempt to release the ankylosis at the referring institution; however, this was complicated by an extradural haematoma as a result of iatrogenic injury. We describe a one-stage procedure which provided safe excision of the ankylotic mass along with immediate total joint replacement with a custom implant. We advocate the use of preoperative vascular imaging along with the use of custom-made cutting guides to minimise vascular injury...
October 8, 2016: BMJ Case Reports
Jiao Wei, Tanja Herrler, Dong Han, Kai Liu, Rulin Huang, Markus Guba, Chuanchang Dai, Qingfeng Li
Joint defects are complex and difficult to reconstruct. By exploiting the body's own regenerative capacity, we aimed to individually generate anatomically precise neo-tissue constructs for autologous joint reconstruction without using any exogenous additives. In a goat model, CT scans of the mandibular condyle including articular surface and a large portion of the ascending ramus were processed using computer-aided design and manufacturing. A corresponding hydroxylapatite negative mold was printed in 3D and temporarily embedded into the transition zone of costal periosteum and perichondrium...
November 28, 2016: Scientific Reports
Lav Kumar Niraj, Basavaraj Patthi, Ashish Singla, Ritu Gupta, Irfan Ali, Kuldeep Dhama, Jishnu Krishna Kumar, Monika Prasad
INTRODUCTION: Magnetic Resonance Imaging (MRI), being a technique with huge potential, has become the primary diagnostic investigation for many clinical problems. Its application now has been successfully used in dentistry to maximize the diagnostic certainty. AIM: The present review aims to analyze the applicability, feasibility and efficacy of MRI in the field of dentistry. MATERIALS AND METHODS: A literature search was performed in main databases like Pub Med Central, Cochrane Library, Embase and Google Scholar from 1970 up to December 2015...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
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: International Journal of Implant Dentistry
António Ramos, Michel Mesnard
The purpose of this article is to present and evaluate an innovative intramedullary implant concept developed for total alloplastic reconstruction in bone resorption cases. The main goal of this innovative concept is to avoid the main problems experienced with temporomandibular (TMJ) devices on the market, associated with bone fixation and changes in kinematics. A three-dimensional finite element model was developed based on computed tomography (CT) scan images, before and after implantation of the innovative implant concept...
October 2016: Journal of Cranio-maxillo-facial Surgery
A Lotesto, M Miloro, L G Mercuri, C Sukotjo
The purpose of this study was to assess the number of alloplastic total temporomandibular joint replacement (TMJ TJR) devices implanted and the complications encountered by members of the American Society of Temporomandibular Joint Surgeons (ASTMJS). A questionnaire was developed using REDCap (Chicago, IL) and an on-line link was e-mailed four times over a 6-week period (February to March 2015) to all members of the ASTMJS. The questionnaire included eight questions related to the surgeon's TMJ TJR experience...
January 2017: International Journal of Oral and Maxillofacial Surgery
Mahrokh Imanimoghaddam, Azam Sadat Madani, Pirooze Mahdavi, Ali Bagherpour, Mansoreh Darijani, Hamed Ebrahimnejad
PURPOSE: This study was performed to compare the condylar position in patients with temporomandibular joint disorders (TMDs) and a normal group by using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: In the TMD group, 25 patients (5 men and 20 women) were randomly selected among the ones suffering from TMD according to the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). The control group consisted of 25 patients (8 men and 17 women) with normal temporomandibular joints (TMJs) who were referred to the radiology department in order to undergo CBCT scanning for implant treatment in the posterior maxilla...
June 2016: Imaging Science in Dentistry
Sumit Gupta, Hemant Gupta, Shadab Mohammad, Hemant Mehra, Subodh Shankar Natu, Niharika Gupta
OBJECTIVE: Temporomandibular joint ankylosis (TMJa) is a distressing condition, but can be surgically managed by gap or interpositional arthroplasty, with an aim to restore joint function and prevent re-ankylosis. The aim of this paper is to compare two interposition materials used in management of TMJ ankylosis. METHODS: 15 patients with TMJa were randomly allocated to two groups: group A (n = 6), interposition material used was medical-grade silicon elastomer, and group B (n = 9) where the interposition material used was temporalis fascia...
May 2016: Journal of Oral Biology and Craniofacial Research
Uvoh Onoriobe, Michael Miloro, Cortino Sukotjo, Louis G Mercuri, Anthony Lotesto, Ransome Eke
PURPOSE: The purpose of this study is to provide a statistical projection of the number of alloplastic temporomandibular joint (TMJ) total joint replacements (TJRs) that will be performed in the United States through the year 2030. MATERIALS AND METHODS: The program directors of all 101 Commission on Dental Accreditation-accredited oral and maxillofacial surgery training programs in the United States were surveyed online by use of a questionnaire developed using Redcap (Chicago, IL) over a 6-week period (February 2015-March 2015)...
August 2016: Journal of Oral and Maxillofacial Surgery
George Puthenpurayil John, Tatu Elenjickal Joy, Justin Mathew, Vinod R B Kumar
Cone beam computed tomography (CBCT) is a medical imaging technique of X-ray computed tomography where the X-rays are divergent, forming a cone. CBCT systems have been designed for imaging hard tissues of the maxillofacial region. The increasing availability of this technology provides the dental clinician with an imaging modality capable of providing a three-dimensional representation of the maxillofacial skeleton with minimal distortion. This article is intended to elaborate and enunciate on the various applications and benefits of CBCT, in the realm of maxillofacial prosthodontics, over and beyond its obvious benefits in the rehabilitation of patients with implants...
January 2016: Journal of Indian Prosthodontic Society
Kyle S Ettinger, Kevin Arce, W Jonathan Fillmore, James M Van Ess, Jacob G Yetzer, Christopher F Viozzi
PURPOSE: To determine whether the number of screws used to fixate a TMJ Concepts total joint prosthesis correlates with loss of hardware fixation or postoperative complications. MATERIALS AND METHODS: A retrospective cohort study of patients undergoing total temporomandibular joint (TMJ) reconstruction with the TMJ Concepts custom prosthesis at the Mayo Clinic from 2005 to 2015 was undertaken. The primary predictor variable was the percentage of screw fixation used in the condylar component...
September 2016: Journal of Oral and Maxillofacial Surgery
Hun-Mu Yang, Jung-Yul Cha, Ki-Seok Hong, Jong-Tae Park
PURPOSE: Stress distribution and mandible distortion during lateral movements are known to be closely linked to bruxism, dental implant placement, and temporomandibular joint disorder. The present study was performed to determine stress distribution and distortion patterns of the mandible during lateral movements in Class I, II, and III relationships. METHODS: Five Korean volunteers (one normal, two Class II, and two Class III occlusion cases) were selected. Finite element (FE) modeling was performed using information from cone-beam computed tomographic (CBCT) scans of the subjects' skulls, scanned images of dental casts, and incisor movement captured by an optical motion-capture system...
April 2016: Journal of Periodontal & Implant Science
Solaiman Tarafder, Alia Koch, Yena Jun, Conrad Chou, Mary R Awadallah, Chang H Lee
Three dimensional (3D) printing has emerged as an efficient tool for tissue engineering and regenerative medicine, given its advantages for constructing custom-designed scaffolds with tunable microstructure/physical properties. Here we developed a micro-precise spatiotemporal delivery system embedded in 3D printed scaffolds. PLGA microspheres (μS) were encapsulated with growth factors (GFs) and then embedded inside PCL microfibers that constitute custom-designed 3D scaffolds. Given the substantial difference in the melting points between PLGA and PCL and their low heat conductivity, μS were able to maintain its original structure while protecting GF's bioactivities...
April 25, 2016: Biofabrication
M Mesnard, A Ramos
The purpose of this study was to evaluate experimentally the behaviors of an intact and an implanted cadaveric ramus, to compare and analyze load mechanism transfers between two validated finite element models. The intact, clean cadaveric ramus was instrumented with four rosettes and loaded with the temporal reaction load. Next, the Biomet microfixation implant was fixed to the same cadaveric mandibular ramus after resection. The mandibular ramus was reconstructed from computed tomographic images, and two finite element models were developed...
May 2016: Journal of Cranio-maxillo-facial Surgery
A Bolzoni, A Mapelli, A Baj, F V Sidequersky, A B Giannì, C Sforza
Seven patients who underwent mandibular reconstruction with a fibula free flap (one on the midline, six on either right or left side) and were rehabilitated with implant supported prostheses, performed free mandibular border movements (maximal mouth opening and closing, right and left lateral excursions, protrusion) that were recorded by a non-invasive motion analyser. Temporomandibular joint (TMJ) kinematic parameters were compared to those calculated in healthy control subjects using z-scores. Maximum mouth opening was reduced in all patients, with z-scores ranging from -2...
December 2015: Acta Otorhinolaryngologica Italica
Angel Alvarez-Arenal, Ignacio Gonzalez-Gonzalez, Marcos Moradas Estrada, Hector deLlanos-Lanchares, Serafin Costilla-Garcia
OBJECTIVES: The purpose of this case study is to show the need for a good differential diagnosis of suspected temporomandibular disorder (TMD) with otologic symptoms. METHODS/RESULTS: This study is a clinical case referring to a patient seeking treatment for pain in the right maxilla. The usual Medical History for diagnosis of a TMD was applied. Anamnesis revealed the patient had had a right maxillary pain for 1 month, a slight hearing loss and dizziness for the past 5-6 months, and two implants placed in the upper jaw 2 years previously...
December 29, 2015: Cranio: the Journal of Craniomandibular Practice
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