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用共价键的均裂和异裂法计算有机物各原子的氧化数 被引量:2
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作者 杨定乔 《黄冈师专学报》 1997年第4期68-71,共4页
应用Lewis的结构式,采用共价键的均裂和异裂方法,计算有机物分子中各原子的氧化数,方法简单,容易计算.
关键词 共价键 均裂法 异裂 有机物 氧化数
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Outcome of surgical treatment of type Ⅳ capitellum frac- tures in adults 被引量:7
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作者 Ajay Pal Singh Ish Kumar Dhammi +1 位作者 Vipul Garg Arun Pal Singh 《Chinese Journal of Traumatology》 CAS 2012年第4期201-205,共5页
Objective: Fractures of the capitellum and trochlea constitute less than 1% of all elbow fractures and a shear fracture involving the capitellum and extending medially into most of the trochlea is rarely reported. Ty... Objective: Fractures of the capitellum and trochlea constitute less than 1% of all elbow fractures and a shear fracture involving the capitellum and extending medially into most of the trochlea is rarely reported. Type Ⅳ capitellum fracture is still controversial in regard to its ra- diographic appearance, surgical approach and osteosynthesis. We report 10 cases of type Ⅳ capitellum fracture with a view to elucidating its clinical features and treatment outcome. Methods: We treated 10 patients of type Ⅳ capitellum fracture with a mean age of 32 years. A uniform surgical approach and postoperative rehabilitation were followed. Results: Nine patients presented to us after a mean of 4 days of injury and one patient was nonunion after 6 months of injury who had been treated conservatively by a bone setter. Double arc sign was absent in 6 cases. Intraopera- tively 6 capitellotrochlear fragments were devoid of soft tissue attachments. By Mayo Elbow Performance Score evaluation, 7 patients got excellent, 2 good and 1 fair results. One patient with associated elbow dislocation developed heterotopic ossification. There was no case of avascular necrosis, osteoarthrosis or fixation failures. Conclusions: Type Ⅳ capitellum fractures are rare and belong to complex articular injuries. A good functional out- come can only be achieved with open reduction and stable internal fixation followed by early mobilization. Preopera- tive radiographic assessment and computed tomography help surgeons in choosing the right surgical approach and implants. Good surgical technique and stable internal fixa- tion are the keys to early mobilization and good functional outcome. 展开更多
关键词 Fractures bone Elbow joint Fracture location internal Bone wires
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