Electrosonographic characteristics of sounds from temporomandibular joint disc replacement

Abstract

Free Papers-Oral Presentations 519induce chondrogenesis and osteogenesis to a basal medium. DCM coupled with supplemented growth factors was tested for its ability to differentiate BMSCs into osteogenic and chondrogenic lineages in two-dimensional (2D) and three-dimensional (3D) cultures. When transforming growth factor-beta3 was added into DCM, BMSCs differentiated to chondrocyte-like cells evidenced by the expression of glycosaminoglycan and type II collagen, whereas osteogenic differentiation was induced by supplementing osteogenic protein-1 (OP-1) resulting detectable expression of osteopontin and osteocalcin. These chondrogenic and osteogenic differentiation markers were enhanced in the 3D cultures compared to the 2D monolayer cultures. The results achieved in this study lay a foundation for the future work on development of biphasic constructs, which may be applied in the treatment of full thickness defects comprising complex of osteochondral tissues.

The reproducibility of temporomandibular joint vibrations over time in the human

“…Other studies have identified the characteristic wave pattern of the joint vibration for each different TMD condition . Owen categorised five specific wave forms to describe the joint conditions: (i) joint inflammation was identified in the frequency pattern as a small spike in the 25 Hz range, (ii) Disc movement (DM) was defined as the early stages of internal problems occurring when the lateral collateral ligaments have become loosened or elongated allowing the disc to move.…”

Analysis of TMJ vibration sounds before and after use of two types of occlusal splints

“…Temporomandibular disorders (TMD) have deserve considerable research since patients present clinical characteristics of limited mouth opening, masticatory muscle spasms, internal derangement in the joints, and consequent instability of the disc-condyle complex producing articular sounds. According some authors, intra-articular sounds are universally accepted signs of TMD and they have correlated types of vibrations with specific disorders (2), although these signs also manifest in asymptomatic subjects (3).…”

“…It has been shown that TMJ sounds (clicking, tripping noises and crepitus) are indication of various clinical conditions (1,3,5,6). Some of these sounds indicate severe dysfunction needing immediate treatment.…”

Avaliação dos ruidos articulares como diagnóstico complementar de desordens temporomandibulares

“…A fim de minimizar a subjetividade na avaliação dos ruídos, diversos pesquisadores utilizaram métodos de gravação do som (Wakebe et al, 1994;Prinz, 1996;Bertolami, 1998;Leader et al, 2001;Tanzilli et al, 2001;Ogutcen-Toller , 2003; Widmalm et al, 2006;Deng et al, 2006;Garcia et al, 2008;Mazetto et al, 2009).…”

“…Para pesquisar e as características eletrosonograficas de sons originários de desarranjos intra-articulares, Deng et al (2006) (Motoyoshi et al,1994 ).…”