不同牙群的解剖特征。

Pub Date : 2024-08-02
Lara Maria Bueno Esteves, Luciano Tavares Ângelo Cintra, Anderson Maikon de Souza Santos, Karen Milaré Seicento Aidar, Carlos Alberto de Souza Costa, Paulo Henrique Dos Santos, André Luiz Fraga Briso
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引用次数: 0

摘要

目的:本研究旨在探讨不同牙齿组的解剖特征与过氧化氢(H2O2)的扩散和漂白效果之间的关联:采用五名患者的计算机断层扫描(CT)图像评估四组牙齿的硬组织厚度和牙髓体积(PV):下颌切牙(LI)、上颌切牙(UI)、犬齿(C)和前臼齿(PM)。此外,80 个牛齿盘被分为四组(n =20),以匹配所研究的每组牙齿的厚度。所有标本都暴露于 35% H2O2 漂白凝胶中,在第一、第二和第三个疗程中使用 50 µL 漂白凝胶 45 分钟。使用过氧化物酶法评估扩散情况。在三次涂抹后和漂白处理 7 天后,使用分光光度计进行颜色变化分析(ΔE、ΔE00 和 ΔWID):PM 组的厚度和 PV 值更大,其次是 C 组、UI 组和 LI 组(P 0.001)。LI 组的 H2O2 扩散量是 PM 组的六倍(P 0.001),而 PM 组的 PV 值是 LI 组的九倍。此外,LI 组和 UI 组比 C 组和 PM 组少进行一次治疗就能达到颜色饱和:结论:特定牙群的解剖特征会影响 H2O2 的扩散和美白效果,从而干扰漂白治疗。此外,H2O2 的扩散能力与牙齿组的厚度成反比。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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Anatomical characteristics of different tooth groups. Effect on in-office bleaching treatment

Aim: The objective of the present study was to investigate the association between the anatomical characteristics of different tooth groups and the diffusion and bleaching effect of hydrogen peroxide (H2O2).

Materials and methods: Computed tomography (CT) images from five patients were used to assess the hard tissue thickness and pulp volume (PV) of four tooth groups: lower (mandibular) incisors (LI), upper (maxillary) incisors (UI), canines (C), and premolars (PM). Additionally, 80 bovine tooth disks were divided into four groups (n = 20) to match the thickness of each tooth group studied. All the specimens were exposed to a 35% H2O2 bleaching gel, with 50 µL applied for 45 min during the first, second, and third sessions. Diffusion was evaluated using the peroxidase enzyme method. Color change analyses (∆E, ∆E00, and ∆WID) were performed after the three application sessions and 7 days after the bleaching treatment using a spectrophotometer.

Results: The PM group showed greater thickness and PV, followed by the C, UI, and LI groups (P 0.001). The LI group had six times greater H2O2 diffusion compared with the PM group (P 0.001), while the PM group exhibited a PV nine times larger than the LI group. Furthermore, the LI and UI groups achieved color saturation with one fewer session than the C and PM groups.

Conclusions: Specific tooth groups have anatomical characteristics that interfere with bleaching treatment in terms of the diffusion and whitening effect of H2O2. Furthermore, the diffusion capacity of H2O2 was inversely proportional to the thickness of the tooth groups.

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