A new articulated distraction arthroplasty device for treatment of the osteoarthritic knee joint: a preliminary report.
OBJECTIVE
The aim of this study was to evaluate the clinical results of a new distraction arthroplasty device when used in conjunction with a bone marrow-stimulating technique for the treatment of osteoarthritis of the knee.


METHODS
We developed a new distraction arthroplasty device that allows continuous joint movement. We compared preoperative and postoperative findings for 6 knees (6 patients; age range, 42 to 58 years). The fixation period for the distraction device ranged from 7 to 13 weeks, and the follow-up period ranged from 1 to 3.5 years.


RESULTS
The Japanese Orthopaedic Association knee score, range of motion, and joint space values were significantly improved in all cases at the latest follow-up (P < .05). Scores on a visual analog pain scale were also significantly improved (P < .05).


CONCLUSIONS
We conclude that treatment using this new arthroplasty device in combination with a bone marrow-stimulating method was effective for osteoarthritic knees in middle-aged patients.


METHODS
Level IV, therapeutic case series.
Department of Orthopaedic Surgery Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan.
Masataka
M
Deie
Mitsuo
M
Ochi
Nobuo
N
Adachi
Ryoji
R
Kajiwara
Atsushi
A
Kanaya
D000328:Adult; D001178:Arthroplasty / Q000295:instrumentation*; D001853:Bone Marrow / Q000503:physiopathology; D020878:Device Removal; D004867:Equipment Design; D015444:Exercise; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology / Q000534:rehabilitation / Q000601:surgery*; D010812:Physical Stimulation; D016896:Treatment Outcome