Effect of thixotropic agents as additives on the mechanical properties of maxillofacial silicone elastomers

An in vitro study to compare the influence of two different primers on the peel bond strength between a maxillofacial silicone material and an acrylic resin material versus a composite resin material

“…The base component of silicone (Part A) consists of polydimethylsiloxanes, a platinum complex as catalyst and surface treated silica fillers. [ 16 ] The cross-linker (Part B) contains a hydrogen siloxane polymer. A hydrogen siloxane polymer is included in the cross-linker (Part B).…”

Mechanical and Morphological Effect of Plant Based Antimicrobial Solutions on Maxillofacial Silicone Elastomer

“…Similarly, an increment and decrement in hardness of silicone after disinfection has been attributed to continuous polymerization of the silicone; the polymerization process can usually be slowed by a reaction between the disinfection products, absorption of the disinfection solution that could lead to a porous structure [ 47 ]. Another study [ 48 ] indicated significant differences in hardness, percentage elongation, tensile strength and tear strength in three maxillofacial silicone materials (M511, Z004 and M511) with thixotropic agents added. The low molecular weight polymer chains of M511 are considered the weakest points in the cross-linked structure, hence leading to low tensile and tear strength [ 48 ].…”

“…Another study [ 48 ] indicated significant differences in hardness, percentage elongation, tensile strength and tear strength in three maxillofacial silicone materials (M511, Z004 and M511) with thixotropic agents added. The low molecular weight polymer chains of M511 are considered the weakest points in the cross-linked structure, hence leading to low tensile and tear strength [ 48 ]. However, a low cross-link density between polymer chains allows more elasticity in tension and reduces rigidity and hardness [ 48 ], which might explain the results obtained in the current study.…”

“…The low molecular weight polymer chains of M511 are considered the weakest points in the cross-linked structure, hence leading to low tensile and tear strength [ 48 ]. However, a low cross-link density between polymer chains allows more elasticity in tension and reduces rigidity and hardness [ 48 ], which might explain the results obtained in the current study.…”

“…The silicone elastomer utilized in this study uses a cross-linking system via an addition reaction. The silicone base contains vinyl terminated polydimethylsiloxanes, surface treated silica fillers and a Platinum complex as catalysts [ 48 ]. The cross-linker (part B) contained a hydrogen siloxane polymer.…”