Clinical results of lithium-disilicate crowns after up to 9 years of service
Clinical results of lithium-disilicate crowns after up to 9 years of service
复制标题
DOI：
10.1007/s00784-012-0700-x
复制
发表时间：
2013-01-01
影响因子：
3.4
通讯作者：
Edelhoff, Daniel
中科院分区：
文献类型：
--
作者：
Gehrt, Maren;Wolfart, Stefan;Edelhoff, Daniel
本前瞻性研究的目的是评估由二硅酸锂玻璃陶瓷框架材料制成的前、后牙冠的临床效果（IPS e.max Press, Ivoclar Vivadent）。41例患者共放置104个单冠，平均年龄34±9.6岁，男性15例，女性26例。植入82个前冠和22个后冠。所有牙齿接受1毫米宽的倒角或圆肩准备，咬合/切牙复位1.5-2.0毫米。最小骨架厚度为0.8 mm。框架由贴面材料的原型与实验釉结合而成。考虑到各个基牙的前提条件，检查的冠要么粘接（69.2%），要么用玻璃离子水门汀（30.8%）插入。插入后6个月随访，然后每年随访一次。替换恢复被定义为失败。4例患者（10个冠）被定义为退出。其余94个冠平均观察时间79.5个月（范围34 ~ 109.7个月）。根据Kaplan-Meier， 5年后的累积生存率为97.4%，8年后为94.8%。应用log rank检验发现，冠的位置对成活率无显著影响（p = 0.74），胶结方式对并发症的发生无显著影响（p = 0.17）。二硅酸锂框架材料应用于单冠是一种可靠的治疗选择。
The purpose of this prospective study was to evaluate the clinical outcome of anterior and posterior crowns made of a lithium-disilicate glass-ceramic framework material (IPS e.max Press, Ivoclar Vivadent).A total of 104 single crowns were placed in 41 patients (mean age, 34 +/- 9.6 years; 15 male, 26 female). Eighty-two anterior and 22 posterior crowns were inserted. All teeth received a 1-mm-wide chamfer or rounded shoulder preparation with an occlusal/incisal reduction of 1.5-2.0 mm. The minimum framework thickness was 0.8 mm. Frameworks were laminated by a prototype of a veneering material combined with an experimental glaze. Considering the individual abutment preconditions, the examined crowns were either adhesively luted (69.2 %) or inserted with glass-ionomer cement (30.8 %). Follow-up appointments were performed 6 months after insertion, then annually. Replacement of a restoration was defined as failure.Four patients (10 crowns) were defined as dropouts. For the remaining 94 crowns, the mean observation time was 79.5 months (range, 34-109.7 months). The cumulative survival rate according to Kaplan-Meier was 97.4 % after 5 years and 94.8 % after 8 years. Applying log rank test, it was shown that the location of the crown did not significantly have an impact on the survival rate (p = 0.74) and that the cementation mode did not significantly influence the occurrence of complications (p = 0.17).The application of lithium-disilicate framework material for single crowns seems to be a reliable treatment option.