High rate of ceramic sandwich liner fracture.

Background: Ceramic bearing surfaces for THA were introduced to reduce the risk of wear. However, owing to liner fracture in some of the early series and presumption that the fractures were the result of the modulus mismatch of the implant and the bone, a ceramic sandwich liner with lower structural rigidity was introduced. Fractures of these devices also were reported subsequently, although the incidence is unclear and it is unknown whether there are any risk factors associated with the fractures.

Dual mobility design use in preventing total hip replacement dislocation following tumor resection.

Introduction: Total hip replacement (THR) following hip tumor resection incurs a high risk of dislocation. We assessed the incidence of dislocation associated with use of a dual mobility cup,and the functional results achieved.

Hypothesis: Use of a dual mobility cup would reduce the risk of THR instability following hip tumor resection.

Friction couples in total hip replacement.

The problem of friction couples remains unresolved to this day. Improvements in femoral and acetabulum implant anchorage over the last 20 years have significantly extended total hip replacement (THR) implant lifespan; the formation of wear debris, however, leads to resorption and osteolysis, considerably shortening implant lifespan in active patients. Alumina-alumina friction couples provide an excellent friction coefficient, with wear particles that do not cause any osteolysis.

Killer dendritic cells link innate and adaptive immunity against established osteosarcoma in rats.

We have previously reported that a distinct subset of splenic CD4(-) rat dendritic cells (DC) induces a rapid and caspase-independent apoptosis-like cell death in a large number of tumor cells in vitro. The killing activity of these killer DC (KDC) was restricted to their immature state and was immediately followed by their engulfment of the apoptotic target cells, suggesting that these KDC could directly link innate and adaptive immunity to tumors. Here, we addressed this question using a transplantable model of rat osteosarcoma.

Arthroscopic treatment of distal clavicle fractures: a technical note.

This article describes a new technique for the arthroscopic treatment of distal clavicle fractures. This technique requires the use of posterior and anterior standard arthroscopic portals. The base of the coracoid process is exposed through the rotator interval.

[Are sacrospinal and sacrotuberal ligaments involved in sacro-iliac joint stability?].

Objectives: Surgery of pudendal nerve entrapment needs the section of both sacrospinal and sacrotuberal ligaments. We asked about the potential side effect of such a section especially on sacro-iliac joint stability.

Material And Methods: We performed a cadaveric anatomical and biomechanical study concerning six sacro-iliac joints.