J Oral Facial Pain Headache. 2016;30(4):330-337. doi: 10.11607/ofph.1676.
To assess the effects of application of an oxalic acid-based desensitizing agent before restoration of noncarious cervical lesions (NCCLs) with either a silorane-based or a methacrylate-based composite resin on decreasing the absolute risk and intensity of dentin hypersensitivity over the course of a 1-year follow-up.
NCCLs in 31 patients (age range 24-66 years) were selected and randomly divided into four groups (n = 31 in all groups). In the Z250 and P90 groups, the restorations were performed with a methacrylate-based composite resin (Filtek Z250) and a silorane-based composite resin (Silorane P90), respectively. In the Z250 + OA and P90 + OA groups, the same composite resins were used, but an oxalic acid-based desensitizing agent (Desenssiv, SSWhite) was first applied. All NCCLs were evaluated before restoration (BR) and at 30, 60, 90, 180, and 360 days after treatment. Teeth sensitivity to evaporative and tactile stimuli was measured by a visual analog scale (VAS). The results were analyzed with statistical tools including Wilcoxon and Friedman tests for within-group comparisons and ANOVA and Bonferroni post hoc tests for between-group comparisons (P < .05).
Reduction in dentin hypersensitivity was observed for all treatment groups; however, these reductions were more pronounced when oxalic acid was applied before restoring the NCCL (P < .001). Complete elimination of pain was not achieved by any treatment modalities for the first 6 months; afterwards, in the groups that had received application of the oxalate-based desensitizing agent, the absolute risk of dentin hypersensitivity was significantly reduced (P < .01).
The restoration of sensitive NCCLs with composite resins reduces dentin hypersensitivity. This reduction is more pronounced if an oxalic acid-based desensitizing agent is applied prior to the restoration. In addition, its application reduces the absolute risk of dentin hypersensitivity after 6 months of treatment.
评估在使用基于硅烷的复合树脂或基于甲基丙烯酸酯的复合树脂修复非龋性颈壁缺损（NCCL）之前应用基于草酸的脱敏剂对降低牙本质敏感的绝对风险和强度的影响在为期 1 年的随访过程中。
选择 31 名年龄在 24-66 岁之间的患者的 NCCL，并将其随机分为四组（每组 31 名患者）。在 Z250 和 P90 组中，分别使用基于甲基丙烯酸酯的复合树脂（Filtek Z250）和基于硅烷的复合树脂（Silorane P90）进行修复。在 Z250+OA 和 P90+OA 组中，使用相同的复合树脂，但首先应用基于草酸的脱敏剂（Desenssiv，SSWhite）。所有 NCCL 在修复前（BR）和治疗后 30、60、90、180 和 360 天进行评估。通过视觉模拟量表（VAS）测量牙齿对蒸发和触觉刺激的敏感性。使用统计工具（包括Wilcoxon 和 Friedman 检验进行组内比较，ANOVA 和 Bonferroni 事后检验进行组间比较）分析结果（P<.05）。
所有治疗组均观察到牙本质敏感的减轻；然而，当在修复 NCCL 之前应用草酸时，这些减轻更为明显（P<.001）。在最初的 6 个月内，任何治疗方法都不能完全消除疼痛；之后，在接受基于草酸盐的脱敏剂治疗的组中，牙本质敏感的绝对风险显著降低（P<.01）。
用复合树脂修复敏感的 NCCL 可减轻牙本质敏感。如果在修复前应用基于草酸的脱敏剂，这种减轻更为明显。此外，它的应用降低了治疗 6 个月后的牙本质敏感的绝对风险。
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