Nihon University Graduate School of Dentistry at Matsudo, Removable Prosthodontics, Matsudo, Japan.
Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, 2-870-1 Sakaecho-nishi, Chiba 271-8587, Japan.
J Prosthodont Res. 2020 Oct;64(4):417-423. doi: 10.1016/j.jpor.2019.11.006. Epub 2020 Feb 12.
This randomized controlled trial aimed to study the effects of lining mandibular complete dentures with silicone-based resilient denture liners, especially with respect to sensation.
The trial included completely edentulous patients who were willing to fabricate new set of complete denture. A random permuted block method (block size: 4) was used to assign participants to one of the following groups: mandibular conventional denture (CD) group or mandibular denture with resilient denture liner (RD) group. The outcomes were evaluated using both, objective measures (current perception threshold (CPT) and pain threshold (PT)) for external stimuli measured using the Neurometer CPT® and subjective measures (physical pain and psychological discomfort measured using the Japanese version of Oral Health Impact Profile for Edentulous patients-OHIP-EDENT-J). The outcomes were measured twice, at immediately after completion of denture adjustments (first measurement), and 3 months after the completion of denture adjustments (second measurement). All outcomes were analyzed using the Student t-test. A p-value of <0.05 was considered statistically significant.
CPT was significantly higher with RD than CD only at second measurement with frequency level of 2000 Hz and 5 Hz. The pain thresholds were significantly higher in the RD group than the CD group. The physical pain and psychological discomfort scores were significantly lower in the RD group than in the CD group.
This study concludes that edentulous patients wearing mandibular complete dentures with silicone-based resilient denture liners dull perception mandibular ridge mucosa and felt less pain than those without the liners.
本随机对照试验旨在研究硅基弹性义齿衬垫对下颌全口义齿的影响，特别是在感觉方面。
本试验纳入了愿意制作新一副全口义齿的完全无牙患者。采用随机区组方法（区组大小为 4）将参与者分为以下两组之一：下颌常规义齿（CD）组或下颌带弹性义齿衬垫的义齿（RD）组。使用 Neurometer CPT® 测量外部刺激的电流感知阈值（CPT）和疼痛阈值（PT）等客观指标，以及使用日本版无牙患者口腔健康影响程度量表（OHIP-EDENT-J）测量的身体疼痛和心理不适等主观指标来评估结果。在义齿调整完成后立即（第一次测量）和调整完成后 3 个月（第二次测量）进行两次测量。所有结果均采用 Student t 检验进行分析。p 值<0.05 被认为具有统计学意义。
仅在第二次测量时，RD 组的 CPT 显著高于 CD 组，频率水平为 2000 Hz 和 5 Hz。RD 组的疼痛阈值显著高于 CD 组。RD 组的身体疼痛和心理不适评分显著低于 CD 组。
本研究得出结论，戴用硅基弹性义齿衬垫的下颌全口义齿的无牙患者对下颌牙槽嵴黏膜的感知迟钝，疼痛程度低于未使用衬垫的患者。
