title: Primary results of Kienböck's disease treated using balloon kyphoplasty system.
abstract: OBJECTIVE
  Kienböck's disease is difficult to treat and optimal treatments for stages II to III continue to elude investigators. We hypothesized that impacting the ischemic cancellous trabeculae and increasing the strength and rigidity of the lunate with balloon kyphoplasty can prevent lunate collapse, relieve the symptoms, and increase wrist range of motion. The purpose of this study was to demonstrate the feasibility of percutaneous balloon kyphoplasty for treatment of stage II to III Kienböck's disease.
  
  
  METHODS
  The study group comprised five patients (two in stage II, three in stage III). All were treated with balloon kyphoplasty. Pain, strength, and wrist flexion/extension range of motion were evaluated preoperatively and postoperatively. The Mayo Wrist Score and the Disabilities of the Arm, Shoulder and Hand (DASH) Score were used to evaluate outcomes. Patient satisfaction was also assessed. Comparisons between preoperative and postoperative data were made with SPSS software.
  
  
  RESULTS
  Clinical data were collected at a mean of 26.6 months (range 24-28 months) postoperatively. Pain was significantly reduced from 6.8 ± 0.8 in the visual analog scale preoperatively to 0.6 ± 0.9 at the 24-month follow-up. Strength and range of motion were improved postoperatively in all patients. The mean DASH score was 11.3 (range 6.7-18.3), and the mean Mayo Wrist Score was 78 (range 75-80). All five patients returned to their previous occupations.
  
  
  CONCLUSIONS
  Balloon kyphoplasty can prevent lunate collapse, reduce pain, and improve wrist function of patients with stage II to III Kienböck's disease. Further studies regarding the feasibility of this new approach are warranted.
authors: Department of Orthopedic Surgery, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang 050051, People's Republic of China. drchenwei1981@gmail.com
authors: Wei
authors: W
authors: Chen
authors: Juan
authors: J
authors: Wang
authors: Jinshe
authors: J
authors: Pan
authors: Qi
authors: Q
authors: Zhang
authors: Xinzhong
authors: X
authors: Shao
authors: Yingze
authors: Y
authors: Zhang
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D058498:Kyphoplasty / Q000295:instrumentation; D012667:Lunate Bone / Q000601:surgery*; D008297:Male; D019637:Orthopedic Procedures / Q000295:instrumentation / Q000379:methods*; D010020:Osteonecrosis / Q000000981:diagnostic imaging / Q000601:surgery*; D010149:Postoperative Pain; D011859:Radiography