Mid-Term Results of Fixed Bearing Unicompartmental Knee Arthroplasty: Minimum 5-Year Follow-Up / 대한정형외과학회잡지

PURPOSE: To evaluate the clinical and radiological outcomes, and the complications of unicompartmental knee arthroplasty (UKA) using a fixed bearing prosthesis after 5-year follow-up. MATERIALS AND METHODS: Twenty-six knees (25 patients) that underwent fixed bearing UKA between May 2003 and August 2011 were included. The subjects were 3 males (3 knees) and 22 females (23 knees), and the average age was 63.5 years. The preoperative diagnosis was osteoarthritis (23 knees) and osteonecrosis (3 knees). The mean follow-up duration was 67 months (from 60 to 149 months). The clinical evaluation included pre- and postoperative American knee society knee and function score, and range of motion. The radiology evaluation included standing antero-posterior, lateral view, and fluoroscopic film to analyze the postoperative alignment and osteolysis. RESULTS: The mean American Knee Society knee score and function score were improved from 42.0 and 57.5 to 87.9 and 85.0, respectively (p < 0.001). The mean preoperative and postoperative range of motion was 132.9° and 132.5°, respectively. The mean femorotibial angle were varus 0.5° preoperatively and valgus 2.2° postoperatively. A radiolucent line was observed in 2 knees; one knee had a stable implant, while in the other knee, patellofemoral arthritis was identified during UKA. Diffuse pain of the knee joint with tenderness of the medial joint line was identified at the follow-up, so conversion to total knee arthroplasty was recommended. No other complications, such as osteolysis, infections, postoperative stiffness, and dislocation, were encountered. CONCLUSION: The midterm results of fixed bearing UKA were clinically and radiologically satisfactory.

Delayed Soft Tissue Coverage after Negative Pressure Wound Therapy in Open Fractures of Lower Extremities / 대한정형외과학회잡지

PURPOSE: To evaluate the delayed soft tissue coverage after previous negative wound therapy in treating wounds associated with open lower extremity fracture. MATERIALS AND METHODS: Between June 2007 and February 2011, delayed soft tissue coverage of open lower extremity fractures after previous use of a negative pressure vacuum device, were performed in 15 consecutive patients. Patients included 13 male and 2 female, and their mean age was 39.0 (7-65) years old. Information on the time from injury to definitive wound coverage, type of coverage, functional result, bone union, and complications such as infection were collected. RESULTS: The vacuum-assisted closure devices was applied for an average of 29.3 (9-50) days, and the mean time from injury to definitive wound was 36.1 (21-60) days. Skin graft coverage was performed in 5 cases, free flap in 8 cases, and local flap in 3 cases. The mean time to radiographic union was 5.2 (3-8) months and delayed union occurred in 2 cases. CONCLUSION: Delayed soft tissue coverage after previous negative wound therapy was considered an alternative treatment method in open lower extremity fractures associated with severe concomitant injury.

Periprosthetic Fracture after Locked Plating in the Osteoporotic Long Bone Fracture / 대한정형외과학회잡지

The locking plate is used for osteoporotic long bone fracture because of the ability to affect a lock between the plate and locking screws that prevents reduction loss, angular deformity and axial deformity. However, it has been reported that locked plating can increase the periprosthetic fracture risk in osteoporotic bone compared with conventional plating. We report 3 cases of periprosthetic fracture after the use of locked plating in osteoporotic long bone fracture and a review of the relevant literatures.

Reverse Shoulder Arthroplasty with Tendon Transfer Using Single Incision for Massive Rotator Cuff Tear with Loss of External Rotation / 대한정형외과학회잡지

In patients with massive rotator cuff tears, operative treatment is considered if there is no improvement after conservative treatment. Reverse shoulder arthroplasty is an option among several treatments. However, in cases of massive rotator cuff tears that extend to the teres minor with combined loss of active elevation and external rotation, reverse shoulder arthroplasty alone might not restore the active external rotation. As a consequence, patients continue to feel inconvenienced in performing activities of daily living. Reverse shoulder arthroplasty, with latissimus dorsi and teres major transfer, can restore functional range of motion in forward flexion and in external rotation. Herein, we report a case of massive rotator cuff tear with literature review.

Subdural Abscess in a Patient with Epidural Abscess Combined with Dural Tear / 대한정형외과학회잡지

Abscesses of the epidural and subdural spine are relatively rare, but can rapidly progress and cause paraplegia; the mortality rate is high despite improvements in treatment method. In particular, the reoccurrence of subdural abscesses after treatment of an epidural abscess is extremely rare. We experienced a case in which the subdural abscess reoccurred after spinal decompression and drainage of an epidural abscess combined with a dural tear. We report this rare case with a review of the relevant literatures.