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Int J Oral Maxillofac Surg ; 42(8): 1007-13, 2013 Aug.
Article in English | MEDLINE | ID: mdl-23769150

ABSTRACT

The purpose of this paper is to present the postoperative results obtained after full temporomandibular joint (TMJ) reconstruction employing the Biomet/Lorenz Microfixation TMJ replacement system (Jacksonville, FL, USA) in 300 patients (201 unilateral, 99 bilateral). Objective data (maximum inter-incisal opening; MIO) and subjective data (function and speech, diet, and pain) were collected preoperatively and at postoperative evaluations performed over a 10-year period (mean 3.5, standard deviation 2.1 years). The MIO measures were obtained using a calliper rule. Subjective data were evaluated using a visual analogue scale with scores ranging from 0 to 5 for each variable. The results were analyzed with the paired t-test (two-sided, α=5%). Each patient showed significant improvements for all of the variables at evaluation on postoperative day 7. The results for MIO, function and speech, and diet, showed improvements at each postoperative evaluation over a maximum of 3 years, with stabilization of the results from the fourth year. Complaints of pain decreased considerably up to the 1-month postoperative evaluation, and no patient reported severe pain at 6 months after surgery. The results presented show that the reconstruction of the TMJ through the installation of the Biomet/Lorenz system prosthesis is a safe and effective option for proper reestablishment of the joint and stomatognathic system function; significant long-term improvements in mandibular range of motion are promoted and pain levels decrease.


Subject(s)
Arthroplasty, Replacement/methods , Joint Prosthesis , Temporomandibular Joint/surgery , Adult , Alloys , Arthroplasty, Replacement/instrumentation , Bone Screws , Chromium Alloys/chemistry , Coated Materials, Biocompatible/chemistry , Diet , Female , Follow-Up Studies , Humans , Joint Prosthesis/classification , Longitudinal Studies , Male , Middle Aged , Pain Measurement , Pain, Postoperative/etiology , Plasma Gases/chemistry , Polyethylenes/chemistry , Prosthesis Design , Range of Motion, Articular/physiology , Safety , Speech/physiology , Temporomandibular Joint Disorders/surgery , Titanium/chemistry , Treatment Outcome , Young Adult
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