The purpose of this study was to determine the effect of distal humeral hemiarthroplasty and implant size on elbow articular contact.
The exclusion criteria were an arthritic stiff elbow, articular incongruence, steroid therapy in the previous two months, burns, connectivopathy or immunologic disease, diabetes, or alterations in blood coagulation.
Given the three force fields associated with severe hypertonic shoulder, elbow, and bi-articular muscle groups, our first goal was to find the minimum number of probing motions that, executed within each force field, would produce a different force profile.
By pulling the endpoint of impaired arm along a semi-elliptical trajectory as shown in Figure 3(c), the orientation of the corresponding force profile is quite different if the movement is executed when interacting with hypertonic elbow or bi-articular conditions.
We excluded elbow extension because the articular deviation of this joint is inferior to 10°, which is inferior to the variability accepted between the two techniques.
The mechanism of posttraumatic elbow contracture is intra-articular effusion, which induces the elbow joint to develop intra-articular adhesion and capsular thickening, limiting flexion, extension, and pronosupination, thus resulting in posttraumatic elbow stiffness, loss of motion, and considerable impairment in daily life.
Rousey is a former judo champion, and she won her first eight M.M.A. fights with a move known in judo as juji gatame, which can be painful to contemplate, let alone receive: it is a type of arm bar designed to hyperextend an opponent's elbow, stretching ligaments, tearing the articular capsule, and even grinding away the bone if the opponent doesn't concede quickly enough.
The biomimetic MSC-Scaffold can be applied in resurfacing arthroplasty of most articular joints (hip, elbow, knee, shoulder, ankle, hand, and foot joints), as well as in implantations of intervertebral discs, because everywhere there the periarticular trabecular bone appears and behaves similarly.
The most frequent lesion in the elbow joint was erosion of the articular cartilage, in particular on the medial humeral condyle (left side 95%, and right side 84%).
A chevron osteotomy of the ulna is widely used to obtain intra-articular access to the elbow in the treatment of type C distal humerus fractures.
During familiarization, participants interacted with four different virtual arms: i) unimpaired arm, ii) maximally impaired shoulder, iii) maximally impaired elbow, and iv) maximally impaired bi-articular muscles.
