Interference screw fixation of free tendon grafts: significant time-dependent decrease of the initial contact forces.

Purpose: Interference screw fixation of tendon grafts is a common practice in ACL surgery. Tissues like tendons and bone show a complex viscoelastic behaviour, which could affect the contact forces in interference screw fixation. These effects are not well investigated, especially over prolonged periods of time.

Anteroposterior and rotational stability in fixed and mobile bearing unicondylar knee arthroplasty: a cadaveric study using the robotic force sensor system.

Purpose: Different bearing designs in unicondylar knee arthroplasty (UKA) have been developed in order to influence the rate of polyethylene wear. Increased anteroposterior translation and rotation after UKA has been hypothesized due to changes in joint surface geometry. The mobile bearing design was expected to show increased anteroposterior translation compared to the fixed bearing and biconcave bearing design.

No difference between tibia-first and femur-first techniques in TKA using computer-assisted surgery.

Purpose: The measured resection technique and the gap-balancing technique are two philosophies used in total knee surgery. It is still unknown whether one or the other technique provides superior results when computer-assisted surgery is performed. We hypothesized that the gap-balancing technique improves joint stability because the technique relies primarily on the soft tissue.

Expectation, satisfaction and clinical outcome of patients after total knee arthroplasty.

Purpose: There is a well-known difference between patients expectation, satisfaction and the measured clinical outcome in total knee arthroplasty (TKA). It has been hypothesized that higher expectation prior to surgery and higher satisfaction will show better clinical outcome according to well-established scoring systems, frequently used for assessment after TKA.

Methods: A consecutive group of 102 patients was included who received TKA for degenerative osteoarthritis.

Distraction forces on repaired bucket-handle lesions in the medial meniscus.

Background: Numerous studies have investigated the biomechanical properties of meniscal repair techniques. One of the most commonly discussed parameters is the failure load in the axis of insertion, although little is known about the distraction forces actually occurring at repaired bucket-handle lesions.

Hypothesis: There are clinically relevant distraction forces on repaired meniscus bucket-handle lesions.