Sotiriou M, Hobkirk J A
Department of Prosthetic Dentistry, Eastman Dental Institute for Oral Health Care Sciences, University of London, United Kingdom.
J Prosthet Dent. 1995 Nov;74(5):455-62. doi: 10.1016/s0022-3913(05)80345-2.
This in vivo study examined forces exerted during the recording of impressions of dentate maxillary arches. This study consisted of 10 subjects; four impression materials in metal stock trays and disposable plastic trays were used. The load rate and the maximum insertion and removal forces were measured with strain gauges mounted on the tray handles. The results indicated considerable variations in forces and load rates related to material, subject, and tray type. Lower forces were measured with the disposable trays. The greatest mean peak removal forces were 36.3 N with a metal tray/elastomer combination and 19.9 N with the same material used in a plastic tray.
这项体内研究考察了在记录有牙上颌牙弓印模过程中施加的力。该研究包括10名受试者；使用了金属标准托盘和一次性塑料托盘中的四种印模材料。通过安装在托盘手柄上的应变片测量加载速率以及最大插入和取出力。结果表明，与材料、受试者和托盘类型相关的力和加载速率存在显著差异。使用一次性托盘时测得的力较低。金属托盘/弹性体组合的最大平均峰值取出力为36.3牛，而在塑料托盘中使用相同材料时为19.9牛。
