Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
J Dent. 2010 Jun;38(6):451-9. doi: 10.1016/j.jdent.2010.02.004. Epub 2010 Feb 25.
This randomised clinical trial evaluated the survival rate of resin-based restorations in Class I and Class II beveled preparations in primary molars, over 48 months.
Forty-eight children received 141 restorations in beveled cavosurface margin preparations in primary molars randomly assigned by a lottery method: 46 received treatment with Vitremer Tri-Cure Glass Ionomer System (33 Class I and 13 Class II restorations); 51 received treatment with Freedom (36 Class I and 15 Class II restorations); 44 received treatment with TPH Spectrum (30 Class I and 14 Class II restorations). Two calibrated examiners (weight kappa> or =0.85) evaluated the restorations using the modified USPHS criteria and visible plaque index score at baseline and after 12, 24, 36 and 48 months. Cox regression with survival analysis and logistic regression evaluated the clinical performance of restorations.
After 48 months, 11 teeth had exfoliated, 16 restorations were dropouts, 83 restorations were clinically successful of which 26 had used Vitremer, 32 had used Freedom and 25 had used TPH Spectrum. Thirty-one restorations failed because of secondary caries, fractures and loss of retention. The cumulative survival was 73.9%, 83.4% and 79.6%, respectively for Vitremer, Freedom and THP Spectrum with no differences among materials (Log Rank Mantel-Cox, p>0.05). However, the Class II cavity preparation reduced the survival of the restorations (OR=5.1) for all materials evaluated (p>0.05).
The life expectancy of Vitremer, Freedom and THP Spectrum in Class I and Class II restorations could be comparable after 48 months.
本随机临床试验评估了在 48 个月的时间内，在乳磨牙的 I 类和 II 类斜面预备中，树脂基修复体的存活率。
48 名儿童的 141 个乳磨牙斜面预备窝沟点隙封闭接受了随机分组治疗：46 名儿童接受 Vitremer Tri-Cure 玻璃离聚物系统治疗（33 个 I 类和 13 个 II 类修复体）；51 名儿童接受 Freedom 治疗（36 个 I 类和 15 个 II 类修复体）；44 名儿童接受 TPH Spectrum 治疗（30 个 I 类和 14 个 II 类修复体）。两位经过校准的检查者（权重 kappa 值>0.85）使用改良的 USPHS 标准和可见菌斑指数评分，在基线、12、24、36 和 48 个月时评估修复体。Cox 回归生存分析和逻辑回归评估了修复体的临床性能。
48 个月后，11 颗牙齿脱落，16 个修复体脱落，83 个修复体临床成功，其中 26 个使用了 Vitremer，32 个使用了 Freedom，25 个使用了 TPH Spectrum。31 个修复体因继发龋、折裂和固位丧失而失败。Vitremer、Freedom 和 TPH Spectrum 的累积存活率分别为 73.9%、83.4%和 79.6%，但材料之间无差异（Log Rank Mantel-Cox，p>0.05）。然而，对于所有评估的材料，II 类窝洞预备降低了修复体的存活率（OR=5.1）（p>0.05）。
在 48 个月后，Vitremer、Freedom 和 TPH Spectrum 在 I 类和 II 类修复体中的预期寿命可能相当。
