... brittle fracture surface 脆性断裂面 Fracture Surface Observe 断口分析 fracture surface morphology 断口形貌 ...
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To observe the clinical effect of operative treatment of calcaneus fracture involved posterior articular surface.
目的观察手术治疗累及后关节面的跟骨骨折效果。
Objective: to observe the effects of different root canal file and the restoration of occlusal surface on the fracture resistance of premolars.
目的：观察不同根管锉预备根管及不同面充填物对前磨牙牙体抗折强度的影响。
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