Oikarinen K, Andreasen J O, Andreasen F M
Department of Oral and Maxillofacial Surgery, University of Oulu, Finland.
Endod Dent Traumatol. 1992 Jun;8(3):113-9. doi: 10.1111/j.1600-9657.1992.tb00447.x.
Horizontal and vertical rigidity of teeth fixed with seven types of dental splints were evaluated by two tooth mobility measuring devices. Altogether 21 dissected sheep mandibles including soft tissues were used for the experiments in which Fermit, flexible wire-composite, Kevlar, Fiber, Protemp, rigid wire-composite and Triad Gel splints were applied to four incisors. The mean rigidity of the central incisors within the splint was measured by means of Mühlemann periodontometer (horizontal mobility) and Periotest (horizontal and vertical mobilities). Mobility values of teeth before splinting were used as covariants and the values with the splints were illustrated as adjusted mobility. Statistical significance between the rigidity of various splints was analyzed by an unpaired t-test. It was shown that the most rigid splints both in horizontal and vertical directions were Triad Gel, rigid wire-composite and Fermit splints. Kevlar and Fiber splint allowed more horizontal movement than other splints. Protemp and flexible wire-composite splints proved to produce adequate lateral support for the fixed teeth and allowed vertical flexibility which is experimentally known to improve periodontal healing of luxated teeth.
使用两种牙齿松动度测量装置评估了用七种牙夹板固定的牙齿的水平和垂直刚度。总共使用了21个包括软组织的解剖绵羊下颌骨进行实验，其中将Fermit、柔性钢丝 - 复合、凯夫拉尔、纤维、Protemp、刚性钢丝 - 复合和Triad Gel夹板应用于四颗切牙。通过Mühlemann牙周计（水平松动度）和Periotest（水平和垂直松动度）测量夹板内中切牙的平均刚度。夹板固定前牙齿的松动度值用作协变量，夹板固定后的数值表示为调整后的松动度。通过不成对t检验分析各种夹板刚度之间的统计学显著性。结果表明，在水平和垂直方向上最刚性的夹板是Triad Gel、刚性钢丝 - 复合和Fermit夹板。凯夫拉尔和纤维夹板比其他夹板允许更多的水平移动。Protemp和柔性钢丝 - 复合夹板被证明能为固定牙齿提供足够的侧向支撑，并允许垂直灵活性，实验表明这可改善脱位牙齿的牙周愈合。
