THE EFFECT OF THREAD LENGTH AND LOCATION ON EXTRACTION STRENGTHS OF ILIOSACRAL LAG SCREWS

被引：66
作者：
KRAEMER, W [1 ]
HEARN, T [1 ]
TILE, M [1 ]
POWELL, J [1 ]
机构：
[1] UNIV TORONTO,SUNNYBROOK HLTH SCI CTR,DIV ORTHOPAED,ORTHOPAED BIOMECH RES LAB,2075 BAYVIEW AVE,TORONTO M4N 3M5,ON,CANADA
来源：
INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED | 1994年 / 25卷 / 01期
关键词：
D O I：
10.1016/0020-1383(94)90176-7
中图分类号：
R4 [临床医学];
学科分类号：
1002 ; 100602 ;
摘要：
Although iliosacral lag screws are an established technique for fixation of sacroiliac joint dislocation and sacral fractures, there is a paucity of data on the relative strength of fixation of screws in the sacral ala and body. The purpose of this study was to quantify and compare the extraction strength of cancellous screws in the sacral ala and body. Twelve fresh frozen cadaveric human pelves (mean age 76) were used to test the extraction strength of three groups of 7.0 mm cannulated cancellous screws: long-threaded in the sacral body, short-threaded in the body and short-threaded in the ala. The mean extraction strengths were 925, 374 and 71 newtons (or 92, 37, and 7 kg) respectively. The differences between the three groups were highly significant (all P< 0.0025). These data strongly recommend that the goal in iliosacral lag screw fixation should be to insert a long-threaded screw into the sacral body, if safely feasible. Fixation in the ala is inferior and should be avoided in the elderly.
引用
收藏
页码：5 / 9
页数：5
相关论文
共 25 条
  • [1] Daum, Et al., Comparison of cortical and cancellous screw pull-out strengths about the posterior column and sacroiliac joint, J. Orthop. Trauma, 5, (1991)
  • [2] Denis, Davis, Comfort, Sacral fractures: an important problem. Retrospective analysis of 236 cases., Clin Orthop Relat Res, 227, (1988)
  • [3] Ebraheim, Rusin, Coombs, Et al., Percutaneous computed-tomography-stabilization of pelvic fractures: preliminary report, J. Orthop. Trauma, 1, (1987)
  • [4] Frandsen, Christoffersen, Madsen, Holding power of different screws in the femoral head, Acta Orthop. Scand., 55, (1984)
  • [5] Goldstein, Phillips, Scalafani, Et al., Early open reduction and internal fixation of the disrupted pelvic ring, J. Trauma, 26, (1986)
  • [6] Helfet, Open reduction internal fixation of the pelvis, Techniques in Orthopaedics, 4, 4, (1990)
  • [7] Holdsworth, Dislocation and fracture-dislocation of the pelvis, J. Bone Joint Surg. [Br], 30, (1948)
  • [8] Hughes, Jordan, The biomechanical properties of surgical bone screws and some aspects of insertion practice, Injury, 4, (1972)
  • [9] Kellam, McMurtry, Paley, Et al., The unstable pelvic fracture, Orthop. Clin. North Am., 18, (1987)
  • [10] Letournel, Fractures of the acetabulum and pelvis, Fractures of the Acetabulum and Pelvis, (1986)
123