OBJECTIVES This paper proposes imaging with 3-dimensional vibroacoustography for postoperatively assessing the uncovered cup area after total hip arthroplasty as a quantitative criterion to evaluate implant fixation. METHODS A phantom with a bone-like structure covered by a tissue-mimicking material was used to simulate a total hip arthroplasty case. Vibroacoustography images of the uncovered...

mandibular canal is the most important anatomical landmark in the body of mandible which always must be considered for implant surgery in posterior mandibular region. damage to vessels and inferior alveolar nerve that passes through the mandibular canal can cause problems such as hemorrhage and neurosensory disturbances. damage to the mandibular canal can occur during implant surgery. depending...

BACKGROUND The mobile bearing designs have not yet been shown to improve clinical outcome of total knee arthroplasty (TKA). In this prospective randomized study, we compared the short-term clinical results of a mobile bearing implant with those of the fixed bearing version of the same implant. METHODS We randomized 100 knees into two double-blind groups who received either the fixed (FB, 52 k...

Objective: To determine the causes of orthopedic implants failure, which is being used in our setup for fixation of different fractures. Materials and Methods: The study was conducted at Orthopedic and Spine surgery unit of Hayatabad Medical Complex (HMC) Peshawar from November 2007 to May 2014. A total of 62 patients were retrospectively identified an included in the study. The inclusion crite...

Recently, an increasing amount of research has focused on the biological and mechanical behavior of highly porous structures of metallic biomaterials, as implant materials for dental implants. Particularly, pure titanium and its alloys are typically used due to their outstanding mechanical and biological properties. However, these materials have high stiffness (Young’s modulus) in comparison to...

BACKGROUND After total hip arthroplasty, there would be some problems for the patients. Implant loosening is one of the significant problems which results in thigh pain and even revision surgery. Difference between Young's modulus of bone-metal is the cause of stress shielding, atrophy, and subsequent implant loosening. MATERIALS AND METHODS In this paper, femoral stem stiffness is reduced by...

INTRODUCTION The geometry and surface characteristics of an implant generate a biomechanical environment that can greatly influence its relationships with the tissues. Varying surface topography was identified as a key element to influence cell morphology and function. However, little is known on how these surface characteristics modulate the biological response and bone healing events at the i...

Four uncemented Symax hip stems were extracted at three weeks and nine, 13 and 32 months, respectively, for reasons other than loosening. The reasons for implant removal were infection in two cases, recurrent dislocation in one and acetabular fracture in one. They were analysed to assess the effect and behaviour of an electrochemically deposited, completely resorbable biomimetic BONIT-hydroxyap...