Feasibility of acetabular posterior column lag screw guide based on digital model design

doi:10.3969/j.issn.2095-4344.2016.48.008

Abstract

Abstract:

BACKGROUND: Acetabular posterior column fracture is usually treated by open reduction and internal fixation, but this type of operation has a long incision, big trauma, bleeding, and long operation time. The application of cancellous bone screw fixation in the anterior and posterior column fractures of acetabulum has been put forward in 1988, and it has the advantages of less surgical trauma, and fast healing of fracture.

OBJECTIVE: To establish acetabular fracture lag screw fixed digital model through the technology of digital computer, and then design an acetabular posterior column lag screw into the needle guide for clinical application.

METHODS: Data of 82 cases receiving pelvic CT scanning in Affiliated Hospital of Jilin Medical College from June 2012 to June 2015 were selected. Pelvic and acetabular three-dimensional models were reconstructed. According to the data, acetabular posterior column simulation lag screw placement method was set. Simulation was operated by digital technology. Acetabular posterior column lag screw guide device was designed and tested in vitro bone specimens. The experience of device applications was summarized, and could be used in clinic.

RESULTS AND CONCLUSION: (1) 82 cases of virtual lag screw implantation succeeded. The distance between anterior superior iliac spine and iliac bone spinous was (158.13±6.94) mm in males, (152.45±7.41) mm in females. Virtual lag screw length was (12.21±1.86) mm in males and (10.38±2.01) mm in females. (2) Guiding device in vitro tests was successful, including the accurate positioning in 8 cases, good positioning in 2 cases, with the excellent and good rate of 100%. (3) A guide device was successfully used in clinical application. Patients did not have special discomfort and postoperative CT showed satisfactory results. (4) These findings demonstrated that screw fixation through anterior superior iliac spine, posterior superior iliac spine bony prominent line midpoint and ischial tuberosity connection for acetabular column fractures is feasible, and thus the design of the navigation device for implant shows high success rate. The navigation device in the posterior column of the acetabulum fracture can obtain strong stability for fixation, and the clinical effect is reliable.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Acetabulum, Bone Nails, Internal Fixators, Tissue Engineering

CLC Number:

R318

Hu Shou-li, Mei Ji-wen, Mu Shang-qiang, Li Kun, Sun Hai-guang. Feasibility of acetabular posterior column lag screw guide based on digital model design[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(48): 7200-7205.

Figures/Tables 3

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