Abstract
The effects of pre-treatment of porcelain surfaces, such as etching and treatment with a silane coupling agent, for obtaining firm adhesion between the adhesive resin, Panavia EX, and the porcelain were examined.The effects of heating treatment(100, 150 and 200℃) in applying the silane coupling agents to porcelain surfaces were examined.Infrared spectra and energy dispersive X-ray spectra were obtained for the porcelain surface, on which a silane coupling agent was applied. A stable shearing adhesive strength, such as 450〜520kgf/cm2, was obtained even after a 24 hour immersion in 37℃ water, when with the etching the porcelain surface was pretreated with a 30% HF solution(60 sec)or heating treatment(150℃, 10 min) when applying the silane coupling agent(2% γ-MPTS). Then the adhesive durability was examined by a thermal cycling test(4〜60℃, 60 sec). After the thermal cycling test(20,000times), the adhesive strength to the porcelain surface polished by #600 sand-paper was strong and only when the 2%γ -MPTS was used did detachment occur.However, the adhesive strength was maintained at about 70〜80% of the early strength with the etching treatment by the pre-treatment with 30% HF for 60 sec and the heating treatment(150℃, 10 min)when applying the 2%γ -MPTS.
