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Implant. Temporomandibular joint

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https://www.readbyqxmd.com/read/28843402/temporomandibular-joint-reconstruction-with-stock-and-custom-made-devices-indications-and-results-of-a-14-year-experience
#1
Giovanni Gerbino, Emanuele Zavattero, Gianfranco Bosco, Sid Berrone, Guglielmo Ramieri
PURPOSE: Temporomandibular joint (TMJ) reconstruction with alloplastic implants is a reliable, safe and effective treatment option for selected debilitating pathologies of the TMJ. This study retrospectively analyzes our 14-year experience in total alloplastic reconstruction of the TMJ using stock and custom Biomet prostheses. Indications, results and rationale for the choice of stock and custom-made devices are discussed. MATERIAL AND METHODS: Patients were enrolled in the study who underwent single-stage alloplastic total joint replacement from January 2000 to October 2014...
August 1, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28792464/histological-and-immunohistochemical-analyses-of-repair-of-the-disc-in-the-rabbit-temporomandibular-joint-using-a-collagen-template
#2
Kuo-Hwa Wang, Wing P Chan, Li-Hsuan Chiu, Yu-Hui Tsai, Chia-Lang Fang, Charn-Bing Yang, Kuan-Chou Chen, Hung-Li Tsai, Wen-Fu Lai
A previous study demonstrated that the reconstituted type I collagen matrix extracted from rabbit tendons enabled the TMJ disc to regenerate in the rabbit. The aim of this study was to investigate changes in the extracellular matrix (ECM) and mechanisms of regeneration in the TMJ disc. In 36 New Zealand rabbits that underwent a partial discectomy, discs were replaced with reconstituted collagen templates for 3 months. A histological analysis showed that moderate to severe degeneration appeared in partially discectomized joints without implantation...
August 9, 2017: Materials
https://www.readbyqxmd.com/read/28764769/anabolic-role-of-lysyl-oxidase-like-2-in-cartilage-of-knee-and-temporomandibular-joints-with-osteoarthritis
#3
Weam Alshenibr, Mustafa M Tashkandi, Saqer F Alsaqer, Yazeed Alkheriji, Amelia Wise, Sadanand Fulzele, Pushkar Mehra, Mary B Goldring, Louis C Gerstenfeld, Manish V Bais
BACKGROUND: Lysyl oxidase like-2 (LOXL2) is a copper-dependent amine oxidase. Our previous studies showed that LOXL2 is elevated during mouse fracture healing. The goal of this study was to evaluate the potential of LOXL2 to act as an anabolic agent in cartilage affected by osteoarthritis (OA). METHODS: LOXL2 was visualized in tissues from human knee and hip joints and temporomandibular joints (TMJ) by immunofluorescence. The activity of LOXL2 in human articular and TMJ chondrocytes was assessed by cell-based assays, microarray analysis, and RT-qPCR, and LOXL2-mediated activation of NF-κB and extracellular signal-related kinase (ERK) signaling pathways was measured by western blotting...
August 2, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28687468/two-different-techniques-of-manufacturing-tmj-replacements-a-technical-report
#4
Marcin Kozakiewicz, Tomasz Wach, Piotr Szymor, Rafał Zieliński
INTRODUCTION: Presently, during the surgical treatment of the patients in maxillofacial surgery, one can use various medical implants. Moreover custom made implants are being used. Replacements may be fitted to the structure and shape of the human skull owing to CAD/CAM (custom aided design/manufacture) called customized implants. This study was aimed to report for the first time clinical material from which custom implants, using two different techniques, were manufactured to reconstruct the temporomandibular joint (TMJ)...
September 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28623683/the-effects-of-unilateral-alloplastic-temporomandibular-joint-replacement-on-the-opposite-side-natural-joint-a-finite-element-analysis
#5
Burak Bekcioglu, Emel Bulut, Burcu Bas
PURPOSE: The purpose of this study was to evaluate the stress distribution on the temporomandibular joint (TMJ) prosthesis and contralateral natural TMJ with finite-element analysis. MATERIALS AND METHODS: A TMJ implant was used to create a 3-dimensional model with a computer. This model was integrated with a mandible model created with a computer by use of computed tomography images, similar to a real TMJ replacement procedure. Masticatory loads were applied to the model...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28612700/knowledge-gaps-in-oral-and-maxillofacial-surgery-a-systematic-mapping
#6
Marie Österberg, Anders Holmlund, Bo Sunzel, Sofia Tranæus, Svante Twetman, Bodil Lund
OBJECTIVES: The aim of this study was to evaluate available knowledge and identify knowledge gaps within the field of oral and maxillofacial surgery, by systematically collecting and evaluating systematic reviews. Twelve specific domains were selected: surgical removal of teeth, antibiotic and corticosteroid prophylaxis, orofacial infections, dental and facial trauma, orthognathic surgery, reconstructive surgery, benign tumors, cysts, premalignant lesions, oral complications of treatment of malignant tumors, hyperbaric oxygen therapy, temporomandibular joint surgery, cost effectiveness of different surgical treatments, and ethics...
January 2017: International Journal of Technology Assessment in Health Care
https://www.readbyqxmd.com/read/28602382/value-in-oral-and-maxillofacial-surgery-a-systematic-review-of-economic-analyses
#7
Benjamin P Geisler, Yisi D Ji, Zachary S Peacock
PURPOSE: The purpose of this study is to describe the state of economic analyses in the field of oral and maxillofacial surgery (OMS). MATERIALS AND METHODS: A systematic search of published literature up to 2016 was performed. The inclusion criteria were as follows: English-language articles on economic analyses pertaining to OMS including anesthesia and pain management; dentoalveolar surgery; orthognathic, cleft, and/or obstructive sleep apnea treatment; pathology; reconstruction; temporomandibular disorders; trauma; and other...
May 18, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28532603/matrix-replenishing-by-bmscs-is-beneficial-for-osteoarthritic-temporomandibular-joint-cartilage
#8
M Zhang, H Yang, L Lu, X Wan, J Zhang, H Zhang, X Liu, X Huang, G Xiao, M Wang
OBJECTIVES: The present goal was to explore whether matrix replenishment is the primary requirement for osteoarthritic (OA) cartilage. METHODS: Cells isolated from the superficial and deep zone cartilage of a pig temporomandibular joint (TMJ) were exposed to fluid flow shear stress (FFSS). Differences in matrix production and cellular differentiation were detected. Unilateral anterior crossbite (UAC) was applied to C57BL/6J female mice. Green fluorescent protein-labeled exogenous bone marrow stromal cells (GFP-BMSCs) were injected weekly into TMJs, starting from 3 weeks of UAC stimulation and continuing for 4-, 8- and 12-weeks...
September 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28449848/adverse-local-tissue-responses-to-failed-temporomandibular-joint-implants
#9
Louis G Mercuri, Robert M Urban, Deborah J Hall, Mathew T Mathew
PURPOSE: The purpose of this study was to determine whether failed alloplastic temporomandibular joint replacement (TMJR) devices can elicit the aseptic lymphocyte-dominated vasculitis-associated lesion (ALVAL) reaction seen in some patients with metal-on-metal hip arthroplasties. MATERIALS AND METHODS: This study involved analysis of paraffin-embedded sections of peri-implant tissue from failed TMJ implant cases obtained from 3 independent sources. Hematoxylin and eosin staining, conventional and polarized light microscopy, back-scattered electron imaging, and energy-dispersive x-ray analysis were used...
April 1, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28341434/trends-in-maxillofacial-imaging
#10
REVIEW
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
https://www.readbyqxmd.com/read/28254733/bioengineered-temporomandibular-joint-disk-implants-study-protocol-for-a-two-phase-exploratory-randomized-preclinical-pilot-trial-in-18-black-merino-sheep-tempojims
#11
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
https://www.readbyqxmd.com/read/28199931/a-personalized-3d-printed-prosthetic-joint-replacement-for-the-human-temporomandibular-joint-from-implant-design-to-implantation
#12
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...
May 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28091447/prosthetic-rehabilitation-of-a-patient-with-a-resected-right-temporomandibular-joint
#13
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
https://www.readbyqxmd.com/read/28049115/single-stage-temporomandibular-joint-arthroplasty-in-a-patient-with-complete-bony-ankylosis-and-previous-extradural-haematoma
#14
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
https://www.readbyqxmd.com/read/27892493/autologous-temporomandibular-joint-reconstruction-independent-of-exogenous-additives-a-proof-of-concept-study-for-guided-self-generation
#15
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
https://www.readbyqxmd.com/read/27891491/mri-in-dentistry-a-future-towards-radiation-free-imaging-systematic-review
#16
REVIEW
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
https://www.readbyqxmd.com/read/27747636/effect-of-bite-force-in-occlusal-adjustment-of-dental-implants-on-the-distribution-of-occlusal-pressure-comparison-among-three-bite-forces-in-occlusal-adjustment
#17
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
https://www.readbyqxmd.com/read/27569384/a-new-condyle-implant-design-concept-for-an-alloplastic-temporomandibular-joint-in-bone-resorption-cases
#18
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
https://www.readbyqxmd.com/read/27567049/status-of-alloplastic-total-temporomandibular-joint-replacement-procedures-performed-by-members-of-the-american-society-of-temporomandibular-joint-surgeons
#19
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
https://www.readbyqxmd.com/read/27358820/evaluation-of-condylar-positions-in-patients-with-temporomandibular-disorders-a-cone-beam-computed-tomographic-study
#20
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
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