Complication rate of molar crowns: a practice-based clinical evaluation.
Complication rate of molar crowns: a practice-based clinical evaluation.
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磨牙冠的并发症率：基于实践的临床评估。
DOI：
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发表时间：
2011
影响因子：
1.7
通讯作者：
M. Roediger
中科院分区：
文献类型：
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作者：
S. Rinke;S. Schäfer;M. Roediger
这项基于实践的研究评估了采用延长饰面瓷冷却时间制造的传统金属陶瓷和氧化锆磨牙冠的初始临床性能。治疗49例患者（A组：高贵合金+低熔瓷；B组：氧化锆冠）。所有氧化锆牙冠均采用改良的烤瓷周期进行贴面，其中包括 6 分钟的冷却时间。平均观察期为 18.2 +/- 4.6 个月后，对 92 个修复体（74 个重要基台/18 个非重要基台）进行了评估。两组均未出现完全失败或活力丧失的情况。 A 组记录了两起事件（1 起固位力丧失/1 起轻微陶瓷碎裂 < 2 mm2）。第三个事件发生在 B 组（轻微陶瓷碎裂 <2 mm2）。所有陶瓷缺陷都可以在口腔内抛光。统计分析显示，采用改进的瓷烧制方法制造的金属陶瓷冠和氧化锆冠的成功率没有显着差异 (p = 0.91)。氧化锆烤瓷的改进烧制似乎降低了磨牙区域早期陶瓷碎裂的风险，导致技术并发症发生率与金属陶瓷冠相当。
This practice-based study evaluates the initial clinical performance of conventionally luted metal-ceramic and zirconia molar crowns fabricated with a prolonged cooling period of the veneering porcelain. Forty-nine patients were treated (group A: high precious alloy + low fusing porcelain; group B: zirconia crowns). All zirconia crowns were veneered with a modified porcelain firing cycle including a 6-minute cooling period. Ninety-two restorations (74 vital abutments/18 nonvital abutments) were evaluated after a mean observation period of 18.2 +/- 4.6 months. No complete failures or loss of vitality were recorded in either group. Two events were recorded in group A (1 loss of retention/1 minor ceramic chipping < 2 mm2). The third event occurred in group B (minor ceramic chipping <2 mm2). All ceramic defects could be polished intraorally. Statistical analysis revealed non-significant differences in success rates (p = 0.91) of metal-ceramic and zirconia crowns fabricated with a modified porcelain firing. The modified firing of the zirconia porcelain seems to decrease the risk for early ceramic chipping in the molar area, leading to a technical complication rate comparable to that of metal-ceramic crowns.