Consistency of implantation of a total knee arthroplasty with a non-image-based navigation system: a case-control study of 235 cases compared with 235 conventionally implanted prostheses.

The aim of the study was to assess the consistency of the non-image-based navigation system OrthoPilot, Aesculap, Tuttlingen, Germany, in total knee arthroplasty (TKA) implantation in 5 European centers. Two hundred thirty-five TKAs implanted with this navigation system were matched (according to severity of the preoperative coronal deformation and body mass index) to a historical control group of 235 TKAs implanted with a conventional technique. Consistency of implantation was studied on a 3-month postoperative radiological control with coronal long-leg and sagittal standard x-rays.

[Ultrasound imaging of the patellar gliding groove].

Ultrasound is a noninvasive, immediately available procedure without radiation, which should be performed after exploration and clinical examination. It cannot, however, replace radiographic examination because the cortical substance represents a barrier for the ultrasound waves so that bony lesions (i.e.

[Ultrasound determination of leg length].

A diagnostic method is presented for measuring the leg length and the difference in leg lengths with ultrasound. A special device for holding and moving the ultrasound transducer was constructed. The measuring points on the hip, knee, and upper ankle can be visualized with a 5- or 7.

[Diseases of the hip joint in childhood and adolescence--ultrasonic differential diagnoses].

A total of 329 children with hip pain were examined by ultrasound, which indicated transient synovitis (n = 161), rheumatoid arthritis (n = 16), tuberculoid arthritis (n = 3), septic arthritis (n = 16), Legg-Calvé-Perthes disease (n = 102), and slipped capital femoral epiphysis (n = 31). Using the standard planes described by DEGUM and DGOOC, it is possible to analyze the joint capsule, the surface of the femoral head, and the periarticular structures. In cases of synovitis or joint effusion, a capsular distension can be diagnosed by ultrasound.

[Ultrasound diagnosis of the elbow joint in fracture of the head of the radius].

Imaging guidelines have been proposed by the German Society of Ultrasonography (DEGUM, 1996) for the locomotor apparatus using five standardized sections of the elbow that allow a reproducible presentation of the surrounding soft tissues and cortical landmarks of this joint. Intra-articular fractures form a variable amount of hematoma, which is easily detected by ultrasound using the proposed standardized sectional planes. Ultrasonography is a cost-effective, easy-to-use and radiation-free method to exclude intra-articular fractures of the elbow.