型腔的不同处理方法对SY-1硅橡胶表面粗糙度的影响

Impact of five different flask disposal methods on surface roughness of SY-1 silicone elastomer

目的:观察不同的赝复体型腔处理方法,对固化后的SY-1硅橡胶表面粗糙度的影响。方法:超硬石膏包埋试样蜡型,去蜡后使用五种不同方法处理余留的型腔表面,灌注SY-1硅橡胶,固化后使用便携式表面粗糙度仪测量表面粗糙度的主要指标。结果:反映表面平均粗糙度的Ra(轮廓算术平均偏差)以皂液处理表面的最大,涂布分离剂和抛光金属表面最小;反映表面最大粗糙度的Ry、Rt中硅油处理、皂液处理及抛光金属表面Ry(轮廓最大高度)最小,涂布分离剂表面最大;硅油处理表面Rt(轮廓峰谷总高度)最小,涂布分离剂的表面最大;反映表面起伏程度的S、Sm及Sk的绝对值中,硅油处理表面S(轮廓的单峰平均间距)最小,未处理、涂布分离剂的和抛光金属表面最大;硅油处理表面的Sm(轮廓微观不平度的平均间距)最小,未处理、涂布分离剂和皂液处理的最大;硅油处理的Sk(轮廓的偏斜度)绝对值最小,抛光金属表面最大。结论:硅油处理型腔后固化的SY-1硅橡胶,其表面粗糙度符合减小组织微创伤的要求,可作为赝复体组织面型腔的首选处理方法。

Objective: To determine which disposal method was optimal for facial prostheses fabrication in laboratory.Methods: The parameters of surface properties were evaluated by a pocket roughness meter after SY-1 elastomer specimenswere vulcanized on the surfaces treated with different methods. Results: Specimens vulcanized on the surface treated bysilicone grease present better surface properties than those vulcanized on surfaces treated by other methods. (Ra=0.592±0.111mm, Ry=3.579±0.187mm, Rd=4.299±0.280mm, Sm=0.139±0.019mm, S=0.168±0.016mm, Sk=0.156±0.014mm3). Conclusion: Among all the five surface treating methods,the silicone grease smearing turns out to be theoptimal one that will cause least microtrauma of the facial prostheses contacting tissue .