Journal of orthopaedic surgery (Hong Kong)
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J Orthop Surg (Hong Kong) · Sep 2019
Effect of cervical flexion and extension on thoracic sagittal alignment.
The cervical spine has the largest sagittal motion in the whole spine, and cervical alignment affects the thoracic sagittal alignment. However, the effects of cervical flexion and extension on thoracic sagittal alignment have not been investigated in detail. The purpose of this study was to analyze the change of thoracic sagittal alignment following cervical flexion and extension. ⋯ Cervical flexion affects the T1S and T5-T8 angle, but there is no significant change in T1-T4 and T9 and lower spino-pelvic columns. This study suggests that T2-T4 can be considered as a stable distal end when cervical long fixation for corrective surgery is performed.
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J Orthop Surg (Hong Kong) · Sep 2019
Posterior wall acetabular fracture fixation: A mechanical analysis of fixation methods.
Stable, anatomical fixation of acetabular fractures gives the best chance of successful outcome, while penetration of the acetabular articular surface with screws is associated with poor outcomes. Spring plates are an alternative to interfragmentary lag screws when penetration is a concern. A mechanical study comparing fracture stability and construct stiffness of three fixation methods for posterior wall acetabular fractures with transverse comminutions was performed. ⋯ The rim plate was the stiffest construct 10,962 N/mm, followed by the spring plate model 5637 N/mm and the buttress plate model 4882 N/mm. Based on data obtained in this study, where possible a rim plate with interfragmentary lag screws should be used for isolated posterior wall fractures as this is the stiffest and most stable construct. When this method is not possible, spring plate fixation is a safe and a superior alternative to a posterior buttress plate method.
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J Orthop Surg (Hong Kong) · Sep 2019
Categorization of single cuneiform fractures and investigation of related injuries: A 10-year retrospective study.
The purpose of this study was to define the fracture type and investigate the injuries related to single medial, intermediate, or lateral cuneiform fracture. ⋯ 4.