目的 评估IPS e.max Press全瓷冠和三单位固定桥3年的存留率。 方法 选择45例，男24例,女21例，全部病例均行 IPS e.max Press全瓷冠或三单位固定桥修复，共67单位IPS e.max Press全瓷冠。其中46个单冠，21个三单位固定桥，单冠 设计在双尖牙和第一磨牙，固定桥设计在前牙及双尖牙区。分别在修复体戴入后6、12、24、36个月对其是否发生脱落和折裂 进行临床观察。 结果 在修复后的3年观察期间，单冠有1例崩瓷，存留率为97.8%;固定桥6例失败,存留率为 71.4%，固定桥失败原因为断裂，其中4例发生在连接体部分，1例基牙折断，1例为基牙松动。 结论 在临床应 用中，IPS e.max Press全瓷单冠的存留率很高，是一种美学和舒适度具佳的修复体，但在固定桥修复设计上应注意严格掌握 临床适应证，避免修复失败。
Abstract
Objective To evaluate the survival rate of IPS e．max Press all-ceramic crowns and three-unit fixed partial dentures (FPDs) followed up for three years． Methods Forty-five patients with dental defects or single tooth loss were included in this study. A total of 46 crowns were placed in molar or premolar areas. 21 all- ceramic FPDs were placed in anterior and premolar areas. Follow-up examinations took place 6, 12, 24, and 36 months after the placement． Results One crown and six FPD fractures were observed during the evaluation. The survival rate was 97.8% for crowns and 71.4% for FPDs .Framework fractures were recorded in FPD where the connector dimensions did not meet the manufacture's specifications. Conclusions Within the observation period of three years, IPS e．max Press crowns exhibit satisfactory performance． Indications should be taken into serious consideration before the use of three-unit fixed partial dentures made from IPS e．max Press.
关键词
IPS e.max Press全瓷冠 /
三单位固定桥 /
存留率
Key words
IPS e．max Press /
all ceramic crowns /
fixed partial dentures /
survival rate
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参考文献
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