A clinical evaluation of chairside lithium disilicate CAD/CAM crowns A two-year report
A clinical evaluation of chairside lithium disilicate CAD/CAM crowns A two-year report
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DOI：
10.14219/jada.archive.2010.0355
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发表时间：
2010-06-01
影响因子：
3.9
通讯作者：
Neiva, Gisele
中科院分区：
文献类型：
--
作者：
Fasbinder, Dennis J.;Dennison, Joseph B.;Neiva, Gisele
背景。陶瓷材料科学的发展导致了现代陶瓷物理性能的改善，导致全陶瓷修复体的临床应用大幅增加。作者评估了二硅酸锂（IPS e.max CAD, Ivoclar Vivadent, Amherst， N.Y.）全陶瓷冠的临床性能。作者使用椅子旁计算机辅助设计/计算机辅助制造（CAD/CAM）系统（CEREC 3, Sirona Dental Systems, Charlotte， N.C.）制作了62个二硅酸锂冠，并用两种胶粘剂树脂胶结它们。两名检查人员使用修改后的美国公共卫生服务标准在基线、6个月、1年和2年对牙冠进行评估。临床未发现冠状骨断裂或表面碎裂的病例。使用这两种骨水泥1年或2年后均无敏感性报告。对于边缘变色，使用自蚀刻双固化水泥的冠的Alfa评分百分比为86.9%。所有其他百分比的Alfa评分大于92.0%，表明在两年的研究中冠没有明显的变化。结果表明，经过2年的临床应用，二硅酸锂冠的修复效果良好。临床意义。早期结果表明，单片二硅酸锂CAD/CAM冠可能是全陶瓷冠的有效选择。
Background. Developments in ceramic material science have led to improvements in the physical properties of modem ceramics, leading to a substantial increase in the clinical use of all-ceramic restorations. The authors evaluated the clinical performance of lithium disilicate (IPS e.max CAD, Ivoclar Vivadent, Amherst, N.Y.) all-ceramic crowns.Methods. The authors fabricated 62 lithium disilicate crowns with a chairside computer-aided design/computer-aided manufacturing (CAD/CAM) system (CEREC 3, Sirona Dental Systems, Charlotte, N.C.) and cemented them with two types of adhesive resin cements. Two examiners used modified U.S. Public Health Service criteria to evaluate the crowns at baseline, six months, one year and two years.Results. There were no clinically identified cases of crown fracture or surface chipping. There was no reported sensitivity at one or two years with either cement. For margin discoloration, the percentage Alfa score was 86.9 percent for crowns cemented with a self-etching, dual-curing cement. All other percentage Alfa scores were greater than 92.0 percent, indicating no appreciable change in the crowns during the two-year study.Conclusions. The results show that lithium disilicate crowns performed well after two years of clinical service.Clinical Implications. Early results indicate that monolithic lithium disilicate CAD/CAM crowns may be an effective option for all-ceramic crowns.