title: [Implantation of calcium phosphate cement/Danshen drug delivery system for avascular necrosis of femoral head].
abstract: OBJECTIVE
  To introduce a new method using calcium phosphate cement/Danshen drug delivery system for avascular necrosis of femoral head and to evaluate its clinical outcome.
  
  
  METHODS
  From May 2000 to June 2005, 48 patients (54 hips) with avascular necrosis of femoral head were treated with calcium phosphate cement/Danshen drug delivery system implantation in the involved femoral head. There were 32 males (36 hips) and 16 females (18 hips) with an average age of 38.7 years (26-62 years). Twenty-one cases had the history of drinking or smoking, 15 cases had the history of receivihg hormonotherapy and 2 had the history of injury in hip joint. The disease course was 2-32 months. According to standard of Association Research Circulation Osseous (ARCO) staging, 9 hips were classified as stage I, 31 as stage II and 14 as stage III The operation consisted of removal of necrotic bone under weight-loading cartilage and the implantation of calcium phosphate cement/Danshen drug delivery system, all manipulations were done through a bone tunnel in trochanter. The function of hip joint were evaluated and X-ray films were taken pre- and post-operatively.
  
  
  RESULTS
  No phlebothrombosis of leg and foreign body action occurred in all cases, and incision healed by first intention. The postoperative follow-up averaged 42.5 months, ranging from 22 to 73 months. According to the evaluation criterion of Dandong 1995 for adult avascular necrosis of femoral head, the results were excellent in 33 hips, good in 17, fair in 3 and poor in 1, the excellent and good rate was 92.6%.
  
  
  CONCLUSIONS
  This method is relatively simple with less invasion, it not only improves the microcirculation of femoral head by local application of traditional Chinese medicine, but also provide mechanic buttress in the weight-loaded area, which is beneficial to repair and reconstruction of femoral head. It may be a choice of minimally invasion surgery for femoral head necrosis.
authors.affiliation: Department of Bone-joint Surgery, Wendeng Hospital of Traditional Chinese Orthopedics and Traumatology, Wendeng Shandong, 264400, P. R. China.
authors.forename: Xiangjie
authors.initials: X
authors.lastname: Huang
authors.forename: Hongjiang
authors.initials: H
authors.lastname: Jiang
authors.forename: Dezhong
authors.initials: D
authors.lastname: Liu
authors.forename: Zhigao
authors.initials: Z
authors.lastname: Zhou
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D001843:Bone Cements; D002130:Calcium Phosphates; D016503:Drug Delivery Systems / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage* / Q000627:therapeutic use; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D005271:Femur Head Necrosis / Q000188:drug therapy / Q000473:pathology / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D027561:Salvia miltiorrhiza
chemical_list: D001843:Bone Cements; D002130:Calcium Phosphates; D004365:Drugs, Chinese Herbal