title: [Study and clinical application of auto-compressive and anti-rotate intramedullary nail].
abstract: OBJECTIVE
  To design an auto-compressive and anti-rotate intramedullary nail (ACACIN) and to evaluate the preliminary clinical efficacy on fixing adult femur fracture.
  
  
  METHODS
  From January 1998 to June 2001, 23 patients with femur fracture were stabilized with auto-compressive and anti-rotate intramedullary nail. 2-4 elastic blocks were installed into the proximal and distal different distance of quincunx nail to defend rotate and axis compress.
  
  
  RESULTS
  Fracture healing were obtained in all 23 patients treated with auto-compressive and anti-rotate intramedullary nail, the time of fracture healing was 6-13 weeks in 21 cases and 15-22 weeks in 2 cases of old fracture. There was no complication related to infection, nail break, abnormal union and joint ankylosis. The results were excellent in 19 cases, good in 3 cases, and moderate in 1 case according Kolmert's criterion for function; the effective rate was 95.7%.
  
  
  CONCLUSIONS
  Auto-compressive and anti-rotate intramedullary nail has a suitable radian for adult femur, can afford stable fixation, anti-rotate and axis compress.
authors.affiliation: Department of Orthopedics, Shajing People's Hospital, Shenzhen Guangdong, P.R. China 518104.
authors.forename: Li
authors.initials: L
authors.lastname: Wan
authors.forename: Da-chuan
authors.initials: DC
authors.lastname: Xu
authors.forename: Zhen-hua
authors.initials: ZH
authors.lastname: Jiang
authors.forename: Shi-cai
authors.initials: SC
authors.lastname: Fan
authors.forename: Ri-hua
authors.initials: RH
authors.lastname: Zhang
authors.forename: Chun-hua
authors.initials: CH
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D001858:Bone Nails; D004867:Equipment Design; D005260:Female; D005264:Femoral Fractures / Q000601:surgery*; D005500:Follow-Up Studies; D005594:Fracture Fixation, Intramedullary; D006801:Humans; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome