6Loizou C L,Parker M J.Avascular necrosis after internal fixation of intracapsular hip fractures:a study of the outcome for 1023 patients[J].Injury,2009,40(11):1143-1146.
7Walker E,Mukherjee D P,Ogden A L,et al.A biomechanical study of simulated femoral neck fracture fixation by cannulated screws:effects of placement angle and number of screws[J].Am J Orthop (Belle Mead NJ),2007,36(12):680-684.
8Parker M J,Ali S M.Short versus long thread cannulated cancellous screws for intracapsular hip fractures:a randomised trial of 432 patients[J].Injury,2010,41(4):382-384.
9Lee Y S,Chen S H,Tsuang Y H,et al.Internal fixation of undisplaced femoral neck fractures in the elderly:a retrospective comparison of fixation methods[J].J Trauma,2008,64(1):55-62.
10Xarchas K C,Staikos C D,Pelekas S,et al.Are two screws enough for fixation of femoral neck fractures?A case series and review of the literature[J].Open Orthop J,2007,8(1):4-8.
5Gurusamy K, Parker M J, Rowlands T K. The complications of displaced intracapsular fractures of the hip: the effect of screw positioning and angulation on fracture healing [ J ]. J Bone Joint Surg Br,2005,87 (5) :632 - 634.
6Harris WH. Traumatic arthritis of the hip after dislocation and acetabular fractures: treatment by mold arthroplasty: an end-result study using a new method of result evaluation. J Bone Joint Surg(Am), 1969, 51: 737-755.
7Garden RS. Stability and union in subcapital fractures of the femur.J Bone Joint Surg(Br), 1964, 46: 630-647.
8Ficat RP. Idiopathic bone necrosis of the femoral head: early diagnosis and treatment. J Bone Joint Surg(Br), 1985, 67: 3-9.
9Garden RS. Malreduction and avascular necrosis in subcapital fractures of the femur. J Bone Joint Surg(Br), 1971, 53: 183-197.
10Barnes R, Brown JT, Garden RS, et al. Subeapital fraetures of the femur:, a prospective review. J Bone Joint Surg(Br), 1976, 58: 2-24.
