Department of Odontology, Dental School, Umeå University, Umeå, Sweden.
Clin Oral Investig. 2010 Apr;14(2):217-22. doi: 10.1007/s00784-009-0287-z. Epub 2009 Jun 6.
The aim of this study was to evaluate the fracture frequency and longevity of fractured class IV resin composite (RC), polyacid-modified resin composite (compomer; PMRC), and resin-modified glass ionomer cement (RMGIC) restorations in a longitudinal long-term follow-up. Eighty-five class IV RC (43: Pekafil), PMRC (24: Dyract (D), Hytac (H)), and RMGIC (18: Fuji II LC (F), Photac Fil (P)) restorations were placed in ongoing longitudinal follow-ups in 45 patients (mean age 54.5 years). The restorations were evaluated during 14 years by slightly modified USPHS criteria at yearly recalls especially for their fracture behavior. For all restorations, 36.5% were fractured, with a Kaplan-Meier (KM) estimate of 8.8 years (standard error (SE) 0.5, confidence interval (CI) 7.9-9.8). The number of fractures per material was 11 RC (25.6%; KM 9.9 years, CI 8.7-11.0), 13 PMRC (54.2%; D 66.6%; H 50.0%; KM 7.5 years, CI 5.8-9.2), and seven RMGIC (36.5%; F 22.2%, P 71.4%; KM 6.9 years, CI 7.9-9.8). Significant differences were seen between RC and PMRC (p = 0.043). A significant higher fracture rate was observed in teeth 12 + 22 compared to teeth 11 + 21. No significant differences were observed between male and female patients. Restorations in bruxing patients (45) showed 22 fractures (KM 8 years; CI 6.9-9.3) and in non-bruxing patients (39) nine fractures (KM 9.9 years, CI 8.7-11.1; p = 0.017). With regard to the longevity of the replaced failed restorations, for RC, the mean age was 4.5 years; for PMRC, 4.3 years; and for RMGIC, 3.3 years. It can be concluded that fracture was the main reason for failure of class IV restorations. An improved longevity was observed for class IV restorations compared to those presented in earlier studies. RC restorations showed the lowest failure frequency and the highest longevity.
本研究旨在通过纵向长期随访评估四类裂损树脂复合树脂（RC）、多酸改性树脂复合树脂（复合体；PMRC）和树脂改性玻璃离子水门汀（RMGIC）修复体的骨折频率和寿命。45 名患者（平均年龄 54.5 岁）正在进行的纵向随访中放置了 85 个四类 RC（43：Pekafil）、PMRC（24：Dyract（D）、Hytac（H））和 RMGIC（18：Fuji II LC（F）、Photac Fil（P））修复体。在每年的随访中，使用略作修改的 USPHS 标准对修复体进行了 14 年的评估，特别是对其骨折行为进行了评估。所有修复体中，36.5%发生了骨折，Kaplan-Meier（KM）估计为 8.8 年（标准误差（SE）为 0.5，置信区间（CI）为 7.9-9.8）。每种材料的骨折数分别为 11 个 RC（25.6%；KM 为 9.9 年，CI 为 8.7-11.0）、13 个 PMRC（54.2%；D 为 66.6%；H 为 50.0%；KM 为 7.5 年，CI 为 5.8-9.2）和 7 个 RMGIC（36.5%；F 为 22.2%，P 为 71.4%；KM 为 6.9 年，CI 为 7.9-9.8）。RC 和 PMRC 之间存在显著差异（p=0.043）。12+22 牙的骨折发生率明显高于 11+21 牙。在男性和女性患者之间未观察到显著差异。磨牙症患者（45 人）的修复体有 22 次骨折（KM 为 8 年；CI 为 6.9-9.3），而非磨牙症患者（39 人）有 9 次骨折（KM 为 9.9 年，CI 为 8.7-11.1；p=0.017）。关于更换失败修复体的寿命，RC 的平均年龄为 4.5 年；PMRC 为 4.3 年；RMGIC 为 3.3 年。可以得出结论，骨折是四类修复体失败的主要原因。与早期研究相比，四类修复体的寿命有所提高。RC 修复体的失败频率最低，寿命最长。
