Preparation and Properties of Oral Impression Material Based on Polysiloxane
ZHANG Liang1a, MA Feng1b,2,3, SHAO Wen1c, LI Shuaishuai4
1.a.Department of Bidding and Purchase-Supply; b.Surgery Dreamworks; c.Department of State-Owned Property Management, the
First Affiliated Hospital of Xi’an Jiaotong University, Xi’an Shaanxi 710061, China; 2.Regenerative Medicine and Surgery Engineering
Research Center of Shaanxi Province, Xi’an Shaanxi 710061, China; 3.Research Institute of Advanced Surgical Techniques and
Engineering, Xi’an Jiaotong University, Xi’an Shaanxi 710061, China; 4.Department of Medical Consumables, Shaanxi Provincial
People’s Hospital, Xi’an Shaanxi 710068, China
Abstract：The present study aimed to prepare oral impression material based on polysiloxane via optimized process and formulation,
using α, ω-dihydroxy polydimethylsiloxane as matrix, tetraethyl orthosilicate as cross-link agent, dibutyltin dilaurate as catalyst,
fumed silica as reinforcing filler, precipitated calcium carbonate as compatibilizer fillers, liquid paraffin as plasticizer. This kind
of oral impression material was of low preparation cost and easy to be popularized. Impression accuracy was analyzed by molding
shrinkage. Curing time was confirmed by the velocity of cross-linking. Mechanical properties were characterized by tensile strength
and tear strength. The results showed that curing time, impression accuracy and mechanical properties were optimum with 100 g
polysiloxane, 6 mL cross-linking agent, 7 mL catalyst, 16 g reinforcing filler, 56 g compatibilizer fillers, and 30 mL plasticizer
respectively. Curing time was 10 minutes and molding shrinkage was below 0.79%. Tensile strength, elongation at break and tearing
strength of oral impression material were 1.19 kPa, 24% and 3.87 kN/m respectively, and the demould property was fine.
张亮1a，马锋1b,2,3，邵雯1c，李帅帅4. 聚硅氧烷口腔印模材料的研制与性能[J]. 中国医疗设备, 2017, 32(10): 27-29.
ZHANG Liang1a, MA Feng1b,2,3, SHAO Wen1c, LI Shuaishuai4. Preparation and Properties of Oral Impression Material Based on Polysiloxane. China Medical Devices, 2017, 32(10): 27-29.
