Ultrasonographic Assessment of Femoral Torsion Angle Based on Tilting Angles of Femoral Neck and Condylar Axis.

Femoral anteversion has been assessed with ultrasound using femoral neck tilting angle (FN-TA); however, femoral torsion angle (FTA), which is defined using FN-TA and condylar axis tilting angle, has not been assessed with ultrasound. This study aimed to establish the ultrasonographic assessment of FTA (US-FTA) by comparing data obtained through US-FTA and computed tomography (CT). Twenty-one patients (age range, 38-82 y) with 21 intact hips were included.

Quantitative analysis of attachment of the labrum to the glenoid fossa: a cadaveric study.

Purpose: This study investigated the direct and continuous attachment of the labrum to the glenoid fossa, including the fibrocartilaginous tissue, using image-analysis software and histology.

Methods: Twenty-six cadaveric shoulders (11 male, 15 female; mean age 80.1 years; age range 36-103 years) were used.

Postoperative evaluation of drill holes for arthroscopic Bankart repair with suture anchors by the use of computed tomography.

Background: Here we investigated the angle and placement of bone holes for suture anchors using postoperative computed-tomography scapula scans.

Methods: The study group comprised 20 shoulders from 20 consecutive patients (13 males and seven females; mean age 23.4 years) who underwent arthroscopic Bankart repair.

Is the canal flare index a reliable means of estimation of canal shape? Measurement of proximal femoral geometry by use of 3D models of the femur.

Background: The canal flare index (CFI; the ratio of the diameter of the femoral canal at the isthmus in the anteroposterior (A-P) view to the diameter of the medullary canal 20 mm above the lesser trochanter) is often used as a canal characteristic. Clinically, however, CFI measurements are sometimes untrustworthy because of femoral rotation and, especially, greater anteversion among Japanese patients. Our objectives were to analyze femoral geometry, by use of 3D CAD models, to evaluate the effects of rotational error, and to seek an index less affected by rotation.

Morphometric analysis of the peroneal tubercle using a three-dimensional computed tomography model.

Background: The peroneal tubercle is a small bony ridge located on the lateral wall on the calcaneus immediately inferior to the lateral malleolus and separates the peroneus brevis and peroneus longus tendons. The size and configuration of the peroneal tubercle has been implicated in the pathogenesis of peroneal tendon tears and tenosynovitis and is the increasing object of clinical interest. However, the morphology of the tubercle is difficult to assess with precision.

Hip Arthroscopic Synovectomy and Labral Repair in a Patient With Rheumatoid Arthritis With a 2-Year Follow-up.

The arthroscopic surgical procedures reported previously for a rheumatic hip joint have been primarily performed as diagnostic procedures. Only a few studies have reported the success of arthroscopic surgery in hip joint preservation. We encountered a special case in which joint remodeling was seen in a patient with rheumatoid arthritis treated with biological drugs after hip arthroscopic synovectomy and labral repair.

Arthroscopic synovectomy of the metacarpophalangeal and proximal interphalangeal joints.

Few reports about clinical experience in arthroscopy of finger joints exist. Furthermore, little attention has been given to arthroscopic synovectomy of rheumatoid fingers. Herein, we describe our experience with arthroscopic synovectomy of metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints in patients with rheumatoid arthritis.

Application of full-scale three-dimensional models in patients with rheumatoid cervical spine.

Full-scale three-dimensional (3D) models offer a useful tool in preoperative planning, allowing full-scale stereoscopic recognition from any direction and distance with tactile feedback. Although skills and implants have progressed with various innovations, rheumatoid cervical spine surgery remains challenging. No previous studies have documented the usefulness of full-scale 3D models in this complicated situation.