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19 May 2016 : Clinical Research  

Thoracic Pedicle Screw Placement Guide Plate Produced by Three-Dimensional (3-D) Laser Printing

Hongliang ChenABCDEF, Kaijing GuoBCD, Huilin YangBCD, Dongying WuBC, Feng YuanBE

DOI: 10.12659/MSM.896148

Med Sci Monit 2016; 22:1682-1686


BACKGROUND: The aim of this study was to evaluate the accuracy and feasibility of an individualized thoracic pedicle screw placement guide plate produced by 3-D laser printing.

MATERIAL AND METHODS: Thoracic pedicle samples of 3 adult cadavers were randomly assigned for 3-D CT scans. The 3-D thoracic models were established by using medical Mimics software, and a screw path was designed with scanned data. Then the individualized thoracic pedicle screw placement guide plate models, matched to the backside of thoracic vertebral plates, were produced with a 3-D laser printer. Screws were placed with assistance of a guide plate. Then, the placement was assessed.

RESULTS: With the data provided by CT scans, 27 individualized guide plates were produced by 3-D printing. There was no significant difference in sex and relevant parameters of left and right sides among individuals (P>0.05). Screws were placed with assistance of guide plates, and all screws were in the correct positions without penetration of pedicles, under direct observation and anatomic evaluation post-operatively.

CONCLUSIONS: A thoracic pedicle screw placement guide plate can be produced by 3-D printing. With a high accuracy in placement and convenient operation, it provides a new method for accurate placement of thoracic pedicle screws.

Keywords: Cadaver, Bone Plates, Printing, Three-Dimensional - instrumentation, Random Allocation, Surgery, Computer-Assisted - methods, Thoracic Vertebrae - surgery

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750