Effect of long-term use of a soft lining material on edentulous mandibular ridge

试验1由于对永久软义齿衬里的临床试验很少，临床医生没有足够的证据证明它们的使用。本研究的目的是探讨永久性软衬材料在临床环境中的应用效果。日本大学附属松岛市附属牙科医院口腔医学院就诊的28名无牙列患者符合选择标准并接受知情同意，参加了这项试验。研究设计为两期交叉的随机临床试验。干预方法：单臂上下颌均采用常规义齿治疗，上颌采用常规义齿，下颌采用软衬义齿。采用层内随机排列区块的方法将受试者分为两组。一组接受双侧下颌常规义齿，然后是上颌传统义齿和下颌软衬义齿，另一组接受Contra…的两套义齿更好的秩序。结果是咀嚼性能、义齿调整的就诊次数、义齿对视觉模拟评分的满意度以及对义齿的偏好。结果如下：1.义齿调整完成后2个月和3个月，软衬义齿的咀嚼性能显著提高。2.使用软衬义齿进行调整的次数显著增加。3.传统义齿与软衬义齿的满意度差异无统计学意义。4.72%的受试者选择软衬义齿。试验2本研究的目的是阐明在相似的研究设计下，软义齿衬里材料的使用是否会影响全口义齿佩戴者的咀嚼性能。将10名受试者按分层区组随机分成两期交叉设计组，一组在常规义齿后佩戴软性义齿衬里材料，另一组在常规义齿后佩戴软性义齿衬里材料，然后进行咀嚼性能评价。比较两种义齿的咀嚼性能、咀嚼功能、咀嚼运动时的咀嚼肌电、最大咬合时的咀嚼肌电和咀嚼运动时下切牙的运动情况。结果表明：软衬义齿在咬合期、咬合期、咀嚼运动早期下切牙点活动时间较常规义齿明显增加。然而，其他结果并没有显示出显著的差异。结论：根据这些随机对照试验的结果，将软义齿衬垫应用于下颌全口义齿是一种有效的治疗方法。较少

Trial 1Since few clinical trials have been carried out for permanent soft denture liner, clinicians have no sufficient evidence of their use. The purpose of this study is to investigate the efficacy of applying permanent soft lining materials in clinical setting. Twenty-eight edentulous patients who visited Nihon university school of dentistry at Matsudo affiliated dental hospital and have fulfilled selection criteria and accepted informed consent enrolled in this trial. Study design was randomized clinical trial with two-period cross-over. Intervention was conventional denture treatment for both maxilla and mandible in one arm, and conventional denture for maxilla and soft-lined denture for mandible in anther arm. A random permuted block within strata method was used for allocation of subjects into two groups. One group received conventional denture in both jaws followed by maxilla conventional denture and mandible soft-lined denture, and another received two sets of denture in contra … More ry order. Outcomes were masticatory performance, number of visit for denture adjustments, denture satisfaction with visual analog scale and preference of fabricated denture. The results were as follows: 1. Masticatory performance was significantly high soft-lined denture at two and three month after completing adjustment of denture. 2. Number of adjustments visits with soft-lined denture was significantly. 3. Satisfaction rating showed no significant differences between conventional and soft-lined denture. 4. Seventy-two percent of subjects selected soft-lined denture.Trial 2The purpose of this study is to clarify whether the use of soft denture liner material will affect the chewing performance of complete denture wearer under the similarly study design. The ten subjects have been allocated by stratified block randomized allocation method into two-period crossover designed groups, one has been arranged to wear soft denture liner material after the conventional denture, and another vice versa, then assessment of masticatory performance were carried out. Assessments of masticatory performance, masticatory value, EMG of masticatory muscle during chewing motion, EMG of masticatory muscle during maximum voluntary clenching and movement at the lower incisal point during chewing motion, were compared between the two prostheses. The results were as follows: soft lined denture showed significant increase against conventional denture in occluding phase time of movement at the lower incisal point during chewing motion in early period. However, other outcomes did not show significant differences. Conclusion: Based on the results of these randomized controlled trials, applying a soft denture liner to a mandibular complete denture is an effective treatment. Less