[Effectiveness analysis of percutaneous parallel screw fixation via posterolateral "safe zone" for Hawkins type Ⅰ- Ⅲ talar neck fractures].

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: 利益冲突　在课题研究和文章撰写过程中不存在利益冲突；经费支持没有影响文章观点和对研究数据客观结果的统计分析及其报道 14. Foot Ankle Int. 2010 Sep;31(9):777-80. doi: 10.3113/FAI.2010.0777. Partial avascular necrosis after talar neck fracture. Babu N(1), Schuberth JM. Author information: (1)Department of Orthopedic Surgery, Laiser Foundation Hospital, San Francisco, CA, USA. jmfoot@aol.com BACKGROUND: Recently, it has been shown that avascular necrosis of the talus can occur in only a portion of the talar body. There is little information regarding the geographic location of the avascular segment and the clinical significance of an incomplete avascular process. METHODS: Seven patients with partial avascular necrosis after Hawkins type II or III fracture dislocations were evaluated with magnetic resonance scans. The precise anatomic location of the avascular segment was determined and assigned to a specific quadrant of the talar body. The operative exposure, incidence of collapse, and time to operative intervention was recorded. RESULTS: The avascular segment of the talar body was located predominantly in the anterior lateral and superior portion in six of the seven patients. Collapse occurred in three of the patients in the area of avascular process. There were no observable trends with regard to operative exposure, Hawkins classification, incidence of collapse, or time to operative intervention to the location of the avascular segment. CONCLUSION: Partial avascular necrosis can occur after fracture dislocation of the talus. The predominant location of the avascular segment was the anterior lateral and superior portion of the talar body. This observation corresponds to regional damage to the blood supply of the talus and may help clarify the pathogenesis of partial avascular process. DOI: 10.3113/FAI.2010.0777