Kimoto Suguru, Kimoto Katsuhiko, Murakami Hiroshi, Gunji Atsuko, Ito Nana, Kawai Yasuhiko
Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.
Gerodontology. 2013 Sep;30(3):187-93. doi: 10.1111/j.1741-2358.2012.00658.x. Epub 2012 May 21.
The purpose of this long-term randomised controlled trial was to compare the longevity of dentures constructed using a conventional acrylic resin (CAR) to that of dentures constructed using an acrylic-based resilient liner (ARL).
The follow-up study was essentially carried out by annual telephone calls to each of the 67 participants. The Kaplan-Meier method and life-table analysis were used for univariate analyses. The Cox proportional-hazards test was used as a final model for statistically adjusting predictor variables such as sex, clinician type, mandibular denture type and age at denture delivery.
The denture type was likely to affect the survival time of the dentures, while the sex and clinician type were not. The group using acrylic-based resilient denture liners had twice the risk of having shorter denture-survival times than those using conventional acrylic resin dentures. Younger participants were likely to have a reduced risk of having shorter denture-survival times than older participants.
We conclude that mandibular complete dentures constructed using ARL are twice as likely as dentures constructed using CAR to have shorter denture survival times, mainly because of material deterioration.
这项长期随机对照试验的目的是比较使用传统丙烯酸树脂（CAR）制作的假牙与使用丙烯酸基弹性衬垫（ARL）制作的假牙的使用寿命。
随访研究主要通过每年给67名参与者逐一打电话进行。采用Kaplan-Meier法和生命表分析进行单变量分析。Cox比例风险检验用作最终模型，对性别、临床医生类型、下颌假牙类型和假牙交付时的年龄等预测变量进行统计调整。
假牙类型可能会影响假牙的存活时间，而性别和临床医生类型则不会。使用丙烯酸基弹性假牙衬垫的组假牙存活时间较短的风险是使用传统丙烯酸树脂假牙组的两倍。年轻参与者假牙存活时间较短的风险可能比老年参与者低。
我们得出结论，使用ARL制作的下颌全口假牙假牙存活时间较短的可能性是使用CAR制作的假牙的两倍，主要原因是材料老化。
