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Implant. Temporomandibular joint

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https://www.readbyqxmd.com/read/27892493/autologous-temporomandibular-joint-reconstruction-independent-of-exogenous-additives-a-proof-of-concept-study-for-guided-self-generation
#1
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
#2
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
#3
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
#4
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...
July 25, 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
#5
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...
August 23, 2016: 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
#6
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
https://www.readbyqxmd.com/read/27195207/silicone-vs-temporalis-fascia-interposition-in-tmj-ankylosis-a-comparison
#7
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
https://www.readbyqxmd.com/read/27186874/how-many-temporomandibular-joint-total-joint-alloplastic-implants-will-be-placed-in-the-united-states-in-2030
#8
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
https://www.readbyqxmd.com/read/27134420/applications-of-cone-beam-computed-tomography-for-a-prosthodontist
#9
REVIEW
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
https://www.readbyqxmd.com/read/27134154/does-the-amount-of-screw-fixation-utilized-for-the-condylar-component-of%C3%A2-the-tmj-concepts-total-temporomandibular-joint-reconstruction-predispose-to-hardware-loss-or-postoperative-complications
#10
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
https://www.readbyqxmd.com/read/27127690/three-dimensional-finite-element-analysis-of-unilateral-mastication-in-malocclusion-cases-using-cone-beam-computed-tomography-and-a-motion-capture-system
#11
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
https://www.readbyqxmd.com/read/27108484/micro-precise-spatiotemporal-delivery-system-embedded-in-3d-printing-for-complex-tissue-regeneration
#12
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...
June 2016: Biofabrication
https://www.readbyqxmd.com/read/27017105/experimental-and-numerical-predictions-of-biomet-%C3%A2-alloplastic-implant-in-a-cadaveric-mandibular-ramus
#13
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
https://www.readbyqxmd.com/read/26900241/evaluation-of-three-dimensional-mandibular-movements-after-reconstruction-with-free-fibula-flap
#14
REVIEW
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
https://www.readbyqxmd.com/read/26714560/temporomandibular-disorder-or-not-a-case-report
#15
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
https://www.readbyqxmd.com/read/26685473/pain-part-5a-chronic-neuropathic-orofacial-pain
#16
Tara Renton, Nadine Kahwaja
Neuropathic pain is a significant social and economic burden. Back pain, joint pain and headaches affect over 30% of the population. Chronic orofacial pain is a common condition and is difficult to diagnose and manage. This two-part paper aims to provide an overview of novel understanding of neuropathic pain, and furnish clinical teams with an update on the less common and less well-recognized chronic orofacial conditions. Headaches and temporomandibular disorders are the most common conditions and are covered in separate papers (6 and 10)...
October 2015: Dental Update
https://www.readbyqxmd.com/read/26377771/two-year-prospective-study-of-outcomes-following-total-temporomandibular-joint-replacement
#17
L M Gonzalez-Perez, N Fakih-Gomez, B Gonzalez-Perez-Somarriba, G Centeno, J F Montes-Carmona
The purpose of this 2-year prospective study was to investigate outcomes achieved with a stock temporomandibular joint (TMJ) replacement system in the management of end-stage TMJ disorders. Fifty-two patients requiring reconstruction (36 unilateral/16 bilateral) were operated on during the period 2006-2012; 68 total prostheses were implanted (Biomet Microfixation TMJ Replacement System). The mean age at surgery was 52.6±11.5 years. Changes in the values of inclusion diagnostic criteria at entry were assessed...
January 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/26377571/rantes-and-sdf-1-are-keys-in-cell-based-therapy-of-tmj-osteoarthritis
#18
L Lu, X Zhang, M Zhang, H Zhang, L Liao, T Yang, J Zhang, L Xian, D Chen, M Wang
The present study aimed to investigate the therapeutic effect of injections of local bone marrow mesenchymal stem cells (BMSCs) on osteoarthritis (OA) of the temporomandibular joint (TMJ) and to explore the role of stromal cell-derived factor 1 (SDF-1) and regulated on activation, normal T-cell expressed and secreted (RANTES) in this effect. Fundamentally, OA of the TMJ was induced by unilateral anterior crossbite in mice. Exogenous green fluorescent protein-labeled BMSCs (GFP-BMSCs) were weekly injected into the TMJ region for 4, 8, and 12 wk...
November 2015: Journal of Dental Research
https://www.readbyqxmd.com/read/26309799/tissue-engineering-whole-bones-through-endochondral-ossification-regenerating-the-distal-phalanx
#19
Eamon J Sheehy, Tariq Mesallati, Lara Kelly, Tatiana Vinardell, Conor T Buckley, Daniel J Kelly
Novel strategies are urgently required to facilitate regeneration of entire bones lost due to trauma or disease. In this study, we present a novel framework for the regeneration of whole bones by tissue engineering anatomically shaped hypertrophic cartilaginous grafts in vitro that subsequently drive endochondral bone formation in vivo. To realize this, we first fabricated molds from digitized images to generate mesenchymal stem cell-laden alginate hydrogels in the shape of different bones (the temporomandibular joint [TMJ] condyle and the distal phalanx)...
2015: BioResearch Open Access
https://www.readbyqxmd.com/read/26300296/christensen-vs-biomet-microfixation-alloplastic-tmj-implant-are-there-improvements-a-numerical-study
#20
António Ramos, Mesnard Mesnard
The objective of this study was to compare the load transfer mechanism and behavior of two total temporomandibular joint (TMJ) prostheses: Biomet and Christensen TMJ models were simulated. Computed tomography (CT) images from a specific patient were used to generate two models for use in simulation of implantation for the total temporomandibular prostheses. Three finite element models were created in all. One considered the intact temporomandibular joint and two received a temporomandibular implant. In the simulation we considered the five most important muscles acting on the mandible and incisor teeth support...
October 2015: Journal of Cranio-maxillo-facial Surgery
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