First application of segmental trabecular metal cones in a custom-made revision tumor prosthesis of the knee: A technical note.

Background: Tumor prostheses are established as a standard procedure in tumors of the lower extremities. Septic and aseptic loosening remains the main reason for the failure of tumor prostheses. Due to bone defects, the possibilities of anchoring revision prostheses are limited.

[Treatment of Hallux Valgus: Current Diagnostic Testing and Surgical Treatment Performed by German Foot and Ankle Surgeons].

Background: Hallux valgus is one of the most prevalent foot deformities, and surgical treatment of Hallux valgus is one of the most common procedures in foot and ankle surgery. Diagnostic and treatment standards show large variation despite medical guidelines and national foot and ankle societies. The aim of this nationwide survey is a description of the current status of diagnostics and therapy of Hallux valgus in Germany.

Atraumatic Femoral Head Necrosis in Adults.

Background: Atraumatic necrosis of the femoral head is a common cause of hip arthrosis in middle age. In Germany, it affects 5000-7000 patients per year, corresponding to an incidence of 0.01%.

Lower Back Pain with Sciatic Disorder Following L5 Dermatome Caused by Herpes Zoster Infection.

We report the case of a 62-year-old patient with lower back pain radiating into the right leg accompanied by numbness. The pain had an acute onset and was resistant to conservative pain treatment. A magnetic resonance imaging (MRI) scan of the lumbar spine showed no degenerative discovertebral lesions, but a swelling of the nerve root supplying the affected dermatome.

Pre-operative arthritis severity as a predictor for total knee arthroplasty patients' satisfaction.

Purpose: Studies have shown that up to 25% of TKA patients are dissatisfied with the implanted knee, even if registry data shows ten-year revision rates below 5%. It has been the question of our study, if it would be possible to identify those patients at risk for dissatisfaction pre-operatively.

Methods: The data of 1,121 consecutive TKA patients with a follow-up between one and six years have been analysed retrospectively.

Influence of computer navigation on TKA revision rates.

Purpose: We performed this study to determine whether the use of imageless navigation reduces revision rates after total knee arthroplasty (TKA).

Methods: Data of 1,121 consecutive primary TKA with a follow-up of one to six years were retrospectively analysed. Following the conversion of the standard technique from conventional to navigated procedures, these data included the last 342 conventional and first 779 navigated procedures performed in our clinic.

Displays mounted on cutting blocks reduce the learning curve in navigated total knee arthroplasty.

The use of computer navigation in total knee arthroplasty (TKA) improves the implant alignment but increases the operation time. Studies have shown that the operation time is further prolonged due to the surgeon's learning curve, and longer operation times have been associated with higher morbidity risks. It has been our hypothesis that an improvement in the human-machine interface might reduce the time required during the learning curve.

Do residents perform TKAs using computer navigation as accurately as consultants?

The implantation of a total knee arthroplasty (TKA) is a milestone in a resident's surgical training. Studies demonstrate higher loosening rates after TKA by inexperienced surgeons. Alignment outliers should be avoided to achieve a long implant survival.

[Imageless computer navigation of hip resurfacing arthroplasty].

Objective: Precise implantation of hip resurfacing arthroplasty by imageless computer navigation. Hence a malalignment of the femoral component, leading to early loss of the implant, can safely be avoided.

Indications: Coxarthrosis in patients with normal bone mineral density; only minor deformity of the femoral head that enables milling around the femoral neck without notching.

The effect of computer navigation on blood loss and transfusion rate in TKA.

The blood loss that accompanies total knee arthroplasty (TKA) can be substantial. Many patients need perioperative blood transfusions. To avoid anemia and transfusion-related complications, the amount of blood loss and need for blood transfusions must be reduced.

How much tibial resection is required in total knee arthroplasty?

The purpose of our study was to calculate the optimal tibial resection depth in total knee arthroplasty. The data from 464 navigated total knee arthroplasties were analysed. An implant with a minimum insert thickness of 8 mm was used.

Is referencing the posterior condyles sufficient to achieve a rectangular flexion gap in total knee arthroplasty?

Femoral malrotation in total knee arthroplasty causes flexion gap instability. Conventional instruments mostly reference the posterior condylar angle (PCA). The aim of this study was to verify whether the computer-navigated flexion gap (GAP) method produces a rectangular flexion gap and if a balanced flexion gap could also be achieved by referencing the PCA.

The continuous epidural infusion of ropivacaine 0.1% with 0.5 microg x mL(-1) sufentanil provides effective postoperative analgesia after total hip replacement: a pilot study.

Purpose: To assess the analgesic efficacy and functional outcome of postoperative epidural infusion of ropivacaine combined with sufentanil in a randomized, controlled trial.

Methods: Thirty-two ASA I-III patients undergoing elective total hip replacement (THR) were included. Lumbar epidural block using 0.