A pulp-osseous implant (Ti-6Al-4V) for treating a mobilized periodontal tooth fractured after 15 years of service. The two pieces of implant divided in bone and pulp were extracted and washed by distilled water. The microstructures of the cross sections of both fractured pulp-osseous implant pieces were observed by SEM, and the compositions of the material attached to the implant surfaces were analyzed by EDAX. The fatigue source, slowly and fast developed fatigue stripe is presented were obviously showed on the cross sections of both parts. EDAX showed a higher percentage of Ca, P attached to the bone implant, as compared to that attached to the pulp implant. The fracture of implant in this case was due principally to metal fatigue, and partly caused by a lack of periodontal maintenance.
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王勤濤 張玉梅 胡奈賽 彭式韞.鈦合金種植體臨床斷裂的原因分析[J].稀有金屬材料與工程,2004,33(4):442~444.[Wang Qintao, Zhang Yumei, Hu Naisai, Peng Shiyun. Microstructure Analysis of Fractured Ti Alloy Implant[J]. Rare Metal Materials and Engineering,2004,33(4):442~444.] DOI：[doi]