Overloading effect on the osmo-viscoelastic and recovery behavior of the intervertebral disc.

In vitro studies investigating the effect of high physiological compressive loads on the intervertebral disc mechanics as well as on its recovery are rare. Moreover, the osmolarity effect on the disc viscoelastic behavior following an overloading is far from being studied. This study aims to determine whether a compressive loading-unloading cycle exceeding physiological limits could be detrimental to the cervical disc, and to examine the chemo-mechanical dependence of this overloading effect.

How Osmoviscoelastic Coupling Affects Recovery of Cyclically Compressed Intervertebral Disc.

Study Design: Osmoviscoelastic behavior of cyclically loaded cervical intervertebral disc.

Objective: The aim of this study was to evaluate in vitro the effects of physiologic compressive cyclic loading on the viscoelastic properties of cervical intervertebral disc and, examine how the osmoviscoelastic coupling affects time-dependent recovery of these properties following a long period of unloading.

Summary Of Background Data: The human neck supports repetitive loadings during daily activities and recovery of disc mechanics is essential for normal mechanical function.

How pre-strain affects the chemo-torsional response of the intervertebral disc.

Background: The role of the axial pre-strain on the torsional response of the intervertebral disc remains largely undefined. Moreover, the chemo-mechanical interactions in disc tissues are still unclear and corresponding data are rare in the literature. The paper deals with an in-vitro study of the pre-strain effect on the chemical sensitivity of the disc torsional response.

Tricalcium phosphate-Fluorapatite as bone tissue engineering: Evaluation of bioactivity and biocompatibility.

Biocomposites consisting of β Tricalcium phosphate (β-TCP) with 26.52% Fluorapatite (Fap) were elaborated and characterized in order to evaluate it potential application in bone graft substitute. Bioactivity was determined with in vitro tests by immersion of samples in simulated fluid body for several periods of times.

[Interest of prosthodontic periodontal surgery in the success of anterior fixed prostheses].

Introduction: Periodontal prosthodontic surgery plays a major role in the integration of aesthetic and functional prosthetic restorations, including in the anterior area. Indeed, any dento-gingival disharmony of volume or shape must be corrected beforehand, thus justify a plastic periodontal surgery.

Observation: This is a 20-year-old patient, who consulted for essentially aesthetic motive: the restoration of the fracture 11.