Orthodontic Department, Alexandria University, Alexandria, Egypt.
Biomaterials Department, Alexandria University, Alexandria, Egypt.
BMC Oral Health. 2024 May 25;24(1):609. doi: 10.1186/s12903-024-04339-x.
High speed electric handpieces have recently been growing in popularity among dental professionals. Advantages include smoother surface preparation and increased cutting efficiency.
The primary objective was to compare enamel surface roughness following resin cleanup after bracket debonding using highspeed air turbine versus electric handpiece. The secondary objective was to record the time needed for resin-clean up.
Forty deidentified freshly extracted human premolars were cleaned and sectioned at the cement-enamel junction. The crowns were embedded in acrylic blocks. Enamel surface roughness parameters (Ra, Rz, Rp and Rv) were measured using a stylus profilometer. Brackets were bonded using a light-cure orthodontic adhesive and stored in distilled water for 24 h. Following bracket debonding, the specimens were randomly divided into 2 groups: First group: resin clean-up was carried out using a 12-fluted carbide bur mounted on a high-speed air turbine; and second group: where an electric handpiece was used. Surface roughness parameters were measured following resin clean up and after polishing using pumice and a rubber cup. Time needed for resin clean-up was recorded. Differences in enamel surface roughness and time between groups were compared using repeated measures ANOVA and independent samples t-test, respectively at P ≤ 0.05.
The electric handpiece groups showed significantly higher values for Ra, Rz and Rp both following resin cleanup and polishing. Time taken for resin cleanup was significantly longer for the electric handpiece group.
Considering both surface roughness and time, electric handpiece do not seem to add greater effectiveness or efficiency to resin cleanup following orthodontic bracket debonding.
高速手机最近在牙科专业人员中越来越受欢迎。其优点包括更平滑的表面准备和更高的切割效率。
主要目的是比较使用高速涡轮手机和电动手机去除托槽粘接后残留的树脂时釉质表面粗糙度。次要目的是记录去除树脂所需的时间。
将 40 颗未标记的新鲜人前磨牙清洁并在牙釉质交界处切割。牙冠嵌入丙烯酸块中。使用触针轮廓仪测量釉质表面粗糙度参数（Ra、Rz、Rp 和 Rv）。使用光固化正畸粘接剂将托槽粘接，在蒸馏水中储存 24 小时。托槽去除后，将样本随机分为两组：第一组：使用高速涡轮手机上的 12 槽碳化钨车针进行树脂清洁；第二组：使用电动手机进行清洁。在进行树脂清洁和使用浮石和橡胶杯进行抛光后，测量表面粗糙度参数。记录去除树脂所需的时间。使用重复测量方差分析和独立样本 t 检验分别比较组间的釉质表面粗糙度和时间差异，P 值均≤0.05。
电动手机组在进行树脂清洁和抛光后，Ra、Rz 和 Rp 的值均显著更高。电动手机组去除树脂所需的时间明显更长。
考虑到表面粗糙度和时间，电动手机在去除正畸托槽粘接后的残留树脂方面似乎没有增加更大的效果或效率。
