Faculty of Medicine and Dentistry, A Coruna, Spain.
Oper Dent. 2012 Jul-Aug;37(4):432-41. doi: 10.2341/11-229-S. Epub 2012 Feb 15.
Long-term assessment of the clinical behavior of direct composite full-coverage crowns using transparent strip crowns as a matrix.
A retrospective observational study without controls of 21 restorations was performed: nine teeth with hypoplasia, six conoid teeth, and six with microdontia. The mean patient age was 22.5 ± 8.2 years. The clinical procedure consisted of cleaning the tooth, acid etching and application of adhesive, after which a transparent strip crown was filled with composite and placed on the tooth. The gingival contour was polished using multifluted burs and interproximal spaces polished with polishing strips. Patients were examined after a period of 12.5 (±4.6) years by two observers who recorded the plaque index and evaluated the restorations in accordance with the modified U. S. Public Health Service (USPHS) criteria.
Except for one case, all the scores obtained on the basis of the USPHS criteria were within the acceptable range. There were no cases of secondary caries. The statistically significant variations were anatomical form, marginal adaptation, marginal discolouration, and surface roughness.
This technique is simple and noninvasive. It is a viable long-term treatment option for teeth with amelogenesis or microdonts and is especially suitable for patients still undergoing growth.
使用透明带冠作为模板，对直接复合全冠的临床行为进行长期评估。
本研究为无对照的回顾性观察研究，共纳入 21 例修复体：9 颗发育不全牙、6 颗锥形牙和 6 颗过小牙。患者的平均年龄为 22.5±8.2 岁。临床操作包括清洁牙齿、酸蚀和应用粘结剂，然后用复合树脂填充透明带冠并放置在牙齿上。使用多刃涡轮机抛光牙龈轮廓，使用抛光条抛光邻间隙。两名观察者在 12.5（±4.6）年后对患者进行检查，记录菌斑指数，并根据改良美国公共卫生服务（USPHS）标准评估修复体。
除 1 例外，所有基于 USPHS 标准获得的评分均在可接受范围内。无继发龋。具有统计学意义的变异为解剖形态、边缘适应性、边缘变色和表面粗糙度。
该技术简单、微创，是一种可行的、长期的针对发育不全或过小牙的治疗选择，尤其适合仍在生长发育的患者。
