Honda Ricardo, Pelepenko Lauter E, Monteiro Mabelle F, Marciano Marina A, Gomes Brenda P F A, de Jesus Soares Adriana, Ferraz Caio R, Almeida José Flávio A
Department of Restorative Dentistry, School of Dentistry of Piracicaba, State University of Campinas, Piracicaba, São Paulo, Brazil.
Department of Prosthodontics and Periodontics, School of Dentistry of Piracicaba, State University of Campinas, Piracicaba, São Paulo, Brazil.
Aust Endod J. 2025 Apr;51(1):47-54. doi: 10.1111/aej.12898. Epub 2024 Oct 28.
This study evaluated the glass fibre post (GFP) removal using three different protocols with ultrasonic tips. Thirty-six extracted single-rooted teeth were endodontically treated and cemented with a 10-mm GFP. Three protocols were used for GFP removal: 20 s activated with cooling, 20 s activated without cooling and 40 s activated without cooling. The removal time and temperature increase on the external root surface were recorded. The amount of residual material and the volume of dentin loss were assessed using micro-computed tomography. Data were analysed using ANOVA with a 5% significance level. The removal time and the amount of residual material were not affected by the protocol. There was no difference in temperature increase between the 20-s groups. The 40s activated without cooling produced the highest temperatures, especially in the apical region, and greater dentin loss. It is not advisable to use the ultrasonic insert continuously for more than 20 s.
本研究评估了使用三种不同超声尖方案去除玻璃纤维桩（GFP）的效果。选取36颗拔除的单根牙进行根管治疗，并用10毫米的GFP进行粘结。使用三种方案去除GFP：冷却激活20秒、未冷却激活20秒和未冷却激活40秒。记录去除时间和牙根外表面的温度升高情况。使用微型计算机断层扫描评估残留材料的量和牙本质损失的体积。采用显著性水平为5%的方差分析对数据进行分析。去除方案对去除时间和残留材料量没有影响。20秒组之间的温度升高没有差异。未冷却激活40秒产生的温度最高，尤其是在根尖区域，并且牙本质损失更大。连续使用超声插入器超过20秒是不可取的。
