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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
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Silane coupling agent(Comparator) | Active Comparator | In the control group, 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. |
|
| .Adhesive containing silane.(Intervention 1 ) | Active Comparator | 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 |
|
| Acid resistance silane containing adhesive.(Intervention 2) | Active Comparator | 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 |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Silane coupling agent | Other | 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 |
| Measure | Description | Time Frame |
|---|---|---|
| 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. | T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up. |
| Measure | Description | Time Frame |
|---|---|---|
| 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 | T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up. |
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Inclusion Criteria:
Patients aging (18-45). Patients with a high level of oral hygiene. Patients with good likelihood of recall availability. - Teeth Inclusion: The restorations were first placed 12 to 24 months ago. Teeth with healthy remaining tooth structure. Posterior restorations with approximately 3mm in size occlusal marginal defect. Asymptomatic teeth before repair.
Exclusion Criteria:
Patient with high caries risk Patient with poor periodontal health. Heavy bruxism habits. Pregnant or lactating females.
-Teeth Exclusion: The restorations with large defects The restorations in the third molars Last experience with allergic reactions against any components of the used materials.
Patients receiving orthodontic treatment
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Yasmin Talaat, master | Contact | 01009925731 | yasmin-abdelnabi@dentistry.cu.edu.eg |
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| ID | Term |
|---|---|
| D014075 | Tooth Discoloration |
| D006967 | Hypersensitivity |
| D014082 | Tooth Fractures |
| ID | Term |
|---|---|
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
| D007154 | Immune System Diseases |
| D018677 | Tooth Injuries |
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|
| Adhesive containing silane.(Intervention 1 ) | Other | 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 |
|
| Acid resistance silane containing adhesive.(Intervention 2) | Other | 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 |
|
| 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. |
| 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 | 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 | T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up. |
| Postoperative sensitivity | Alpha :No postoperative sensitivity Charlie: Short-term and tolerable postoperative sensitivity | T0= Baseline 24 hours postoperative. T1= 6 months follow up. T2= 12 months follow up |
| D014947 |
| Wounds and Injuries |