Page 44 - Demo

Chapter 242and osseointegration of the ramal component of the TMJ TJR system are absolute necessities for treatment success.(49) The process of osseointegration is influenced by many different factors, including the properties of the material.(50) For instance, while the implant material must be stiff enough to prevent micromotions after implantation, which prevent good osseointegration, the elastic modulus must be comparable to that of bone to prevent the shielding of the underlying bone from forces on the implant, as the under-stimulation of bone can decrease bone density, leading to bone resorption and failure of osseointegration.(51,52) Second, the wear resistance of material properties is important. Considering that the prosthesis is subjected to repetitive force and movements, a material Table 4: Materials and Total TMJ prosthesis. (13,20, 21, 36, 38-44,46-48)Material Surgeon Year of introductionRamus: Co-Cr with PMMA condyleFossa: Co-CrChristensen 1965Ramus: Co-CrFossa: Co-Cr with PMMA cementKiehn 1974Ramus: Co-Cr with acrylic condyleFossa: Co-CrMorgan 1976Ramus: Co-CrFossa: Co-CrMomma 1977Ramus: Co-Cr with PMMA cementFossa: Co-CrKummoona 1977Ramus: Co-CrFossa: Teflon® and Proplast® (I and II)Fossa: Proplast® and UHMWPEVitek-Kent 19831986Ramus: Titanium and palladiumFossa: Polyethylene with PMMA cementSonnenburg and Fethke 1983Ramus: Titanium and palladiumFossa: Polyethylene with PMMA cementSonnenburg and Sonnenburg 1983Ramus: Titanium with Co-Cr-Mo condyleFossa: Titanium and UHMWPETechmedia 1989Ramus: Nitride coated titanium Fossa: Nitride coated titaniumTTN-TMJ 1992Ramus: Titanium with nitride coated condyleFossa: Titanium and UHMWPEHoffman and Pappas 1993Ramus: Co-CrFossa: UHMWPEBiomet 1993Ramus: Co-CrFossa: Co-CrNexus CMF 1996Ramus: Titanium with zirconia condyleFossa: Titanium and zirconiaInterpositional disc: UHMWPEGroningen TMJ 1999Nikolas de Meurechy NW.indd 42 05-06-2024 10:14