Evaluation the influence of the use of silane coupling agent application as a separate step versus application of silane or acid resistance silane containing adhesives on the clinical performance of repaired posterior resin composite restorations according to Modified United States Public Health Service (USPHS) criteria over one year.
some manufacturers have produced silane-containing adhesives in their new products, which might eliminate the need to apply separate silane. However, this silane coupling agent can be hydrolyzed by the acidic monomer in the adhesive making it useless. Acid resistance silane containing adhesive is the update version of the silane containing adhesive which provides a long lasting effective bond between the old and new resin composite restorations
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
75
Silane coupling agent (Porcelain primer) will be applied following the acid etch rinsing and drying step, for 30 seconds and then it will be thoroughly dried using air syringe then universal adhesive with regular silane will be actively applied for 20 seconds and then it will be light cured for 20 seconds and final restoration will be done
Universal adhesive with regular silane will be applied for 20 seconds, air thinned for 10 seconds and then it will be light cured for 20 seconds and final restoration will be done using same resin composite material
Marginal adaptation
Alpha (A) Restoration adapts closely to the tooth structure; there is no visible crevice Bravo (B) There is a visible crevice, the explorer will penetrate, without dentin exposure. Charlie(C) The explorer penetrates into a crevice in which dentin or the base is exposed.
Time frame: T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up.
Anatomical form
Alpha (A)Anatomic form ideal Bravo (B)Restoration is under contoured, without dentin, or base exposure Charlie (C)Restoration is under contoured, with dentin or base exposure; anatomic form is unsatisfactory; restoration needs replacement
Time frame: T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up.
Marginal discoloration
Alpha(A) No marginal discoloration. Bravo(B)Minor marginal discoloration without staining toward the pulp, only visible using a mirror and operating light. Charlie(C) Deep discoloration with staining toward the pulp, visible at a speaking distance of 60 to 100 cm.
Time frame: T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up.
Surface roughness
Alpha(A) As smooth as the surrounding enamel. Bravo(B) Rougher than surrounding enamel; improvement by finishing is feasible Charlie(C) Very rough, could become anti-esthetic and/or retain biofilm; improvement by finishing is not feasible
Time frame: T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up.
Secondary caries
Alpha :No active caries present Charlie: Active caries is present in contact with the restoration
Time frame: T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Acid resistance silane containing adhesive will be applied for 20 seconds, dry with gentle air for 3 seconds, then with stronger air and light cured for 10 seconds and final restoration will be done
Postoperative sensitivity
Alpha :No postoperative sensitivity Charlie: Short-term and tolerable postoperative sensitivity
Time frame: T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up