Singh Girendra, Agarwal Abhinav, Lahori Manesh
Department of Prosthodontics, K.D. Dental College and Hospital, Mathura, Uttar Pradesh, India.
J Indian Prosthodont Soc. 2019 Jan-Mar;19(1):42-48. doi: 10.4103/jips.jips_82_18.
This study aimed to evaluate the effect of cigarette smoke on the surface roughness of two commercially available denture base materials.
A total numbers of 40 specimens were fabricated from two commercially available denture base materials: heat-cured polymethylmethacrylate and flexible denture base materials (20 for each). The specimens for each type were divided into four subgroups: subgroup I, heat-cured denture base material specimens (control group); subgroup II, flexible denture base material (control group); subgroup III, heat-cured denture base material specimen exposed to cigarette smoking group; and subgroup IV, flexible denture base material specimens exposed to cigarette smoking. The control groups were used for immersion in distilled water, and the smoke test groups were used for exposure to cigarette smoking. The smoke test group specimens were exposed to smoking in a custom-made smoking chamber using six cigarettes for each specimen. The surface roughness was measured using a profilometer, and the measurements were considered as the difference between the initial and final roughness measured before and after smoking. Paired test and independent -test were used to interpret differences in initial and final roughness values within and between groups respectively.
Paired -test showed a significant difference between initial surface roughness and final surface roughness within each subgroup.
The surface roughness of the specimens fabricated from the flexible denture base material was found to be more compared to heat-cured denture base specimens after exposure to cigarette smoke.
本研究旨在评估香烟烟雾对两种市售义齿基托材料表面粗糙度的影响。
用两种市售义齿基托材料制作40个标本：热固化聚甲基丙烯酸甲酯和柔性义齿基托材料（各20个）。每种类型的标本分为四个亚组：亚组I，热固化义齿基托材料标本（对照组）；亚组II，柔性义齿基托材料（对照组）；亚组III，暴露于香烟烟雾的热固化义齿基托材料标本组；亚组IV，暴露于香烟烟雾的柔性义齿基托材料标本组。对照组用于浸入蒸馏水中，烟雾试验组用于暴露于香烟烟雾中。烟雾试验组标本在定制的吸烟室内吸烟，每个标本使用六支香烟。使用轮廓仪测量表面粗糙度，测量值被视为吸烟前后测量的初始粗糙度和最终粗糙度之间的差异。分别使用配对检验和独立检验来解释组内和组间初始和最终粗糙度值的差异。
配对检验显示每个亚组内初始表面粗糙度和最终表面粗糙度之间存在显著差异。
暴露于香烟烟雾后，发现由柔性义齿基托材料制成的标本的表面粗糙度比热固化义齿基托标本更大。
