title: Uncemented allograft-prosthetic composite reconstruction of the proximal femur.
abstract: BACKGROUND
  Allograft-prosthetic composite can be divided into three groups names cemented, uncemented, and partially cemented. Previous studies have mainly reported outcomes in cemented and partially cemented allograft-prosthetic composites, but have rarely focused on the uncemented allograft-prosthetic composites. The objectives of our study were to describe a surgical technique for using proximal femoral uncemented allograft-prosthetic composite and to present the radiographic and clinical results.
  
  
  METHODS
  Twelve patients who underwent uncemented allograft-prosthetic composite reconstruction of the proximal femur after bone tumor resection were retrospectively evaluated at an average followup of 24.0 months. Clinical records and radiographs were evaluated.
  
  
  RESULTS
  In our series, union occurred in all the patients (100%; range 5-9 months). Until the most recent followup, there were no cases with infection, nonunion of the greater trochanter, junctional bone resorption, dislocation, allergic reaction, wear of acetabulum socket, recurrence, and metastasis. But there were three periprosthetic fractures which were fixed using cerclage wire during surgery. Five cases had bone resorption in and around the greater trochanter. The average Musculoskeletal Tumor Society (MSTS) score and Harris hip score (HHS) were 26.2 points (range 24-29 points) and 80.6 points (range 66.2-92.7 points), respectively.
  
  
  CONCLUSIONS
  These results showed that uncemented allograft-prosthetic composite could promote bone union through compression at the host-allograft junction and is a good choice for proximal femoral resection. Although this technology has its own merits, long term outcomes are yet not validated.
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Sichuan, China.
authors.forename: Li
authors.initials: L
authors.lastname: Min
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Sichuan, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Peng
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Sichuan, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Duan
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Sichuan, China.
authors.forename: Wenli
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Sichuan, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Sichuan, China.
authors.forename: Chongqi
authors.initials: C
authors.lastname: Tu
keywords: Bone tumor; proximal femur; uncemented allograft prosthetic composite