Department of Fixed and Removable Prosthodontics, Center for Dentistry and Oral Hygiene, University of Groningen, Antonius Deusinglaan 1, 9713, AV Groningen, The Netherlands.
Clin Oral Investig. 2013 Apr;17(3):823-32. doi: 10.1007/s00784-012-0790-5. Epub 2012 Jul 21.
This study evaluated the survival rate of ceramic laminate veneers bonded to teeth with and without existing composite restorations (ECR).
Twenty patients (mean age: 49.7 years) received 92 feldspathic ceramic laminate veneers (Shofu Vintage AL) on the maxillary teeth (intact teeth: n = 26; teeth with ECR: n = 66). Preparations with incisal overlap were made, and ECR of good quality were not removed but conditioned using silica coating (CoJet) and silanization (ESPE-Sil). Enamel and dentin were etched with 38% H3PO4 for 15-30 s and rinsed 30 s; adhesive resin (Excite) was applied, and laminate veneers were then cemented (Variolink Veneer). Restorations were evaluated at baseline and thereafter every 6 months using modified United States Public Health Service criteria.
Mean observation period was 21.6 months. Overall, five absolute failures were encountered (fractures: n = 3; chipping: n = 1; debonding: n = 1), resulting in a survival rate of 94.6% (Kaplan-Meier). Survival rates of the laminates bonded to teeth without (96%) and with ECR (93.5%) did not show significant differences (p > 0.05). Slight marginal defects (16 of 87 laminates) and slight marginal discoloration at the margins were noted (12 of 87 laminates) until the final recall. Secondary caries and endodontic complications were not detected in any of the teeth.
The clinical survival of ceramic laminate veneers up to 40 months was not significantly influenced when they were bonded onto intact teeth or onto teeth with ECR.
When no caries is present, it may not be necessary to replace existing composite restorations prior to cementation of ceramic laminate veneers.
本研究评估了在有和没有现有复合修复体（ECR）的牙齿上粘结陶瓷贴面的存活率。
20 名患者（平均年龄：49.7 岁）在上颌牙齿上接受了 92 个长石质陶瓷贴面（Shofu Vintage AL）（完整牙：n=26；有 ECR 的牙：n=66）。进行了有切端覆盖的预备，并且没有去除质量良好的 ECR，而是使用硅烷涂层（CoJet）和硅烷化（ESPE-Sil）进行预处理。釉质和牙本质用 38% H3PO4 酸蚀 15-30 秒，并用 30 秒冲洗；应用粘结树脂（Excite），然后粘结贴面（Variolink Veneer）。使用改良的美国公共卫生服务标准，在基线和此后每 6 个月对修复体进行评估。
平均观察期为 21.6 个月。总体而言，发生了 5 例绝对失败（折断：n=3；崩瓷：n=1；脱粘：n=1），存活率为 94.6%（Kaplan-Meier）。粘结到无 ECR 牙齿（96%）和有 ECR 牙齿（93.5%）的贴面的存活率无显著差异（p>0.05）。在最终随访时，注意到 87 个贴面中有 16 个有轻微边缘缺陷和 12 个边缘轻微变色。在任何牙齿中均未发现继发龋和牙髓并发症。
在粘结到完整牙或有 ECR 的牙齿上，陶瓷贴面的临床存活率在 40 个月内不受影响。
在不存在龋坏的情况下，在粘结陶瓷贴面之前，可能没有必要更换现有的复合修复体。
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