Department of Dental Medicine, Division of Pediatric Dentistry, Karolinska Institutet, Stockholm, Sweden Department of Pediatric Dentistry, Public Dental Service, Dalarna County, Falun, Sweden
Department of Prosthetic Dentistry, Public Dental Service, Dalarna County, Falun, Sweden.
J Dent Res. 2015 Aug;94(8):1041-7. doi: 10.1177/0022034515584385. Epub 2015 Apr 29.
Amelogenesis imperfecta (AI) is a rare, genetically determined defect in enamel mineralization. Existing treatment recommendations suggest resin-composite restorations until adulthood, although such restorations have a limited longevity. New crown materials allow for minimal preparation techniques. The aim of this study was to compare the quality and longevity of 2 crown types-Procera and IPS e.max Press-in adolescents and young adults with AI. A secondary aim was to document adverse events. We included 27 patients (11 to 22 y of age) with AI in need of crown therapy in a randomized controlled trial using a split-mouth technique. After placing 119 Procera crowns and 108 IPS e.max Press crowns following randomization, we recorded longevity, quality, adverse events, and tooth sensitivity. After 2 y, 97% of the crowns in both crown groups had excellent or acceptable quality. We found no significant differences in quality between Procera and IPS e.max Press crowns. Tooth sensitivity was significantly reduced after crown therapy (P < 0.001). Endodontic complications occurred in 3% of crowns. The results show that it is possible to perform crown therapy with excellent results and without severe complications in young patients with AI. The study is registered at http://www.controlled-trials.com (ISRCTN70438627).
釉质发育不全（AI）是一种罕见的、由基因决定的釉质矿化缺陷。现有的治疗建议建议使用树脂复合材料修复体，直到成年，尽管这种修复体的寿命有限。新型牙冠材料允许采用最小的预备技术。本研究旨在比较两种牙冠类型——Procera 和 IPS e.max Press-in 在釉质发育不全的青少年和年轻人中的质量和寿命。次要目的是记录不良事件。我们在一项随机对照试验中纳入了 27 名需要牙冠治疗的 AI 患者（年龄 11 至 22 岁），采用分口技术。在随机分组后放置 119 个 Procera 牙冠和 108 个 IPS e.max Press 牙冠后，我们记录了牙冠的寿命、质量、不良事件和牙齿敏感性。2 年后，两组牙冠的 97%都具有优秀或可接受的质量。我们没有发现 Procera 和 IPS e.max Press 牙冠之间在质量上有显著差异。牙冠治疗后牙齿敏感性显著降低（P < 0.001）。有 3%的牙冠发生了牙髓并发症。结果表明，对于患有 AI 的年轻患者，可以进行牙冠治疗，获得良好的效果，且没有严重的并发症。该研究在 http://www.controlled-trials.com（ISRCTN70438627）注册。
