[Influence of autoclave sterilization on dimensional stability and detail reproduction of 5 additional silicone impression materials].
OBJECTIVE
To evaluate the dimensional stability and detail reproduction of five additional silicone impression materials after autoclave sterilization.


METHODS
Impressions were made on the ISO 4823 standard mold containing several marking lines, in five kinds of additional silicone. All the impressions were sterilized by high temperature and pressure (135 °C, 212.8 kPa) for 25 min. Linear measurements of pre-sterilization and post-sterilization were made with a measuring microscope. Statistical analysis utilized single-factor analysis with pair-wise comparison of mean values when appropriate. Hypothesis testing was conducted at alpha = 0.05.


RESULTS
No significant difference was found between the pre-sterilization and post-sterilization conditions for all locations, and all the absolute valuse of linear rate of change less than 8%. All the sterilization by the autoclave did not affect the surfuce detail reproduction of the 5 impression materials.


CONCLUSIONS
The dimensional stability and detail reproduction of the five additional silicone impression materials in the study was unaffected by autoclave sterilization.
Department of General Dentistry 2, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Tong-kai
TK
Xu
Zhi-hui
ZH
Sun
Yong
Y
Jiang
D003760:Dental Impression Materials / Q000737:chemistry*; D006358:Hot Temperature; D008422:Materials Testing; D008853:Microscopy; D003765:Models, Dental; D011145:Polyvinyls / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry; D013242:Sterilization / Q000379:methods*
D003760:Dental Impression Materials; D011145:Polyvinyls; D012826:Silicone Elastomers; D012833:Siloxanes; C480691:aquasil; C034183:vinyl polysiloxane