Temporomandibular joint ankylosis is defined as bony or fibrous adhesion of the anatomic joint components accompanied by a limitation in opening the mouth, causing difficulties with mastication, speaking and oral hygiene as well as inadvertently influencing mandibular growth. Surgical treatment procedures include arthroplasty of the joint cavity with or without a reconstruction and a coronoidec...

We treated 43 patients (38 women and 5 men) with osteoarthritis of the basal joint of the thumb by non-cemented arthroplasty of the first carpometacarpal joint as described by Ledoux. The probability of a patient avoiding revision for 12 months was 62% and for 16 months 59%. The indications for revision were aseptic loosening in 83% and luxation in 17%. The surviving prostheses were reviewed cl...

Analysis of deformity and subsequent correction are the basis for many orthopaedic surgical procedures. In advanced cases of joint degeneration, arthroplasty may be the only available treatment option. Until recently, these analyses and preoperative surgical plans have been performed using standard radiographs, tracing paper, and/or plastic overlays. Numerous customized, commercially available,...

The biological ankle joint adjusts stiffness to adapt changing walking speed, terrain, and load carriage. most commonly used passive transtibial prostheses are unable adjust device therefore do not maximize potential energy storage peak prosthesis power across speeds. We present a quasi-passive variable ankle–foot with discrete adjustment from 352 479 Nm/radian, corresponding the range of quasi...

Powered prostheses hold promises to restore adaptive and robust locomotion lower-limb amputees. However, their daily use is still challenged by several shortcomings, on top of which those related control methods. This letter reports the development an controller for a transfemoral prosthesis that combines predictive torque component with feedback error-correction mechanism. The module based Loc...

Introduction: The temporomandibular joint (TMJ) is composed of dense fibrocartilage formed between the mandibular condyle and temporal bone. high collagen content this disc provides great rigidity durability. Osteoarthritis-like degenerative disease belonging to disorder (TMD) a destruction bone cartilage with consequent inflammation that enhances tissue destruction. As treatment, implantation ...

Elbow arthroplasty is performed less often than hip or knee arthroplasty. The most common reason for patients requiring elbow arthroplasty is chronic inflammatory joint disease, usually rheumatoid arthritis.1 Two main types of prostheses exist, linked and nonlinked. Prosthesis fixation in bone is achieved with bone cement in almost all linked and non-linked prostheses.2 Cement restrictors preve...

The paper proposes a model of a fatigue device for testing dedicated to ankle prostheses. The concept of the testing device relies on two aspects: almost any type of ankle prosthesis can be tested on it and it has to work on INSTRON axial-torsion testing machine. Starting from these requirements, a 3D functional assembly that reproduces the real movement of the ankle joint during gait cycle has...

Exposure of the prosthesis is one of the problems encountered after arthroplasty of the knee. Eight patients with nine exposed prostheses have been treated by using a gastrocnemius myocutaneous flap to provide cover. This preserved the prosthesis and closed the joint in six of the eight patients.l The factors leading to breakdown of the wound are discussed and the anatomy of the gastrocnemius m...

Dur ing the last few years, development in upper l imb prosthetics has been focused on the use of external power. N o w the introduction of the endoskeletal structure of body-powered a rm prostheses requires completely new develop­ ments of such traditionally established designs as the mechanical elbow joint . The s tandard exoskeletal elbow requires for operat ion two control movements, one fo...