Babu B Dinesh, Jain Veena, Pruthi Gunjan, Mangtani Nidhi, Pillai Rajath S
Department of Prosthodontics, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India.
Department of Dentistry, Aarhus University, Aarhus, Denmark.
J Indian Prosthodont Soc. 2017 Jul-Sep;17(3):233-238. doi: 10.4103/jips.jips_113_17.
Soft liners act as a cushion between the denture base and the residual ridge. Hence, it is important to study their effect on resorption of mandibular denture bearing area. Therefore, the purpose of this study was to evaluate the influence of soft denture liner on mandibular ridge resorption after 1 year in completely denture wearers.
Twenty-eight completely edentulous patients having age between 45 and 60 years with well-formed ridges in class I jaw relations were selected as per the inclusion and exclusion criterion. Randomization chart was used to enroll participants in experimental and control groups who were given mandibular dentures with and without soft denture liner, respectively. Vertical measurements were made on orthopantomograph and analyzed using Adobe Photoshop 7.0 software at five points, i.e., one at central incisor and two points at right and left first premolars and two in each first molar region.
On application of repeated measures analysis of variance, both groups showed a significant change in bone height after denture delivery ( < 0.05). Intergroup comparison (Wilcoxon rank sum test) of bone height in different regions at various time intervals showed statistically significant difference in bone levels ( < 0.05) from baseline to 6 months and baseline to 12months ( < 0.01), while the difference was statistically not significant during 6 and 12 months' period.
The use of soft denture liner significantly reduces the residual ridge resorption in complete denture wearers as compared to conventional denture wearers (without denture liner) over a period of 1 year.
软衬垫在义齿基托和剩余牙槽嵴之间起缓冲作用。因此，研究它们对下颌义齿承托区吸收的影响很重要。所以，本研究的目的是评估在全口义齿佩戴者中，软质义齿衬垫对1年后下颌牙槽嵴吸收的影响。
根据纳入和排除标准，选取28例年龄在45至60岁之间、I类颌关系且牙槽嵴形态良好的无牙患者。使用随机化图表将参与者纳入实验组和对照组，分别为他们提供带有和不带有软质义齿衬垫的下颌义齿。在曲面断层片上进行垂直测量，并使用Adobe Photoshop 7.0软件在五个点进行分析，即中切牙处一个点、左右第一前磨牙处各两个点以及每个第一磨牙区各两个点。
应用重复测量方差分析，两组在义齿戴入后骨高度均有显著变化（P<0.05）。不同时间间隔不同区域骨高度的组间比较（Wilcoxon秩和检验）显示，从基线到6个月以及从基线到12个月骨水平存在统计学显著差异（P<0.05），而在6个月和12个月期间差异无统计学意义。
与传统义齿佩戴者（无义齿衬垫）相比，在1年的时间里，使用软质义齿衬垫可显著减少全口义齿佩戴者的剩余牙槽嵴吸收。
