PULLOUT STRENGTH COMPARISON OF 2 METHODS OF ORIENTING SCREW INSERTION IN THE LATERAL MASSES OF THE BOVINE CERVICAL-SPINE

被引：32

作者：

ERRICO, T

UHL, R

COOPER, P

CASAR, R

MCHENRY, T

机构：

[1] Department of Orthopedic Surgery, New York University School of Medicine, New York, NY

[2] Department of Neurosurgery, New York University School of Medicine, New York, NY

[3] Orthopaedic Institute Department of Bioengineering, Hospital for Joint Diseases, New York, NY

[4] Department of Orthopedic Surgery, Albany Medical Center, Albany, NY

来源：

JOURNAL OF SPINAL DISORDERS | 1992年 / 5卷 / 04期

关键词：

SCREW INSERTION; PULLOUT FORCE;

D O I：

10.1097/00002517-199212000-00011

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

We undertook a biomechanical study to compare the pullout strength of 3.5-mm AO screws placed in two different orientations within the bovine cervical spine. The first set of screws were oriented obliquely and passed through the lateral mass, as recommended by the AO group. The orientation of the second set was anterior to posterior through the lateral mass, as recommended by Roy-Camille. All screw holes were drilled and tapped by a spinal surgeon experienced with both techniques. Pullout force was measured on an Instron materials testing machine using a self-centering screw-holding chuck and loading rate of 0.833 mm/sec. Although the bone strength in the Roy-Camille orientation was greater (46.7 N/mm versus 36.1 N/mm, p < 0.05), the overall mean pullout force for the AO orientation was greater (607 N versus 471 N, p < 0.025) due to the longer length of bone available for screw purchase (17.0 mm versus 10.3 mm).

引用

页码：459 / 463

页数：5

共 9 条

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