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Evaluation of composite restorations done in carious cervical lesions restored by a conventional universal adhesive in comparison to a universal adhesive that contains and resistant silane coupling agent according to the Modified United States Public Health Service (USPHS) criteria over 18 months.
The presence of acidic monomers in the bottle during storage can lead to the hydrolysis of silane contained in universal adhesives, potentially reducing its effectiveness and causing instability,The acid resistant silane coupling agent has a protective structure against attacks from acidic monomers. Therefore, long-term storage stability can be expected by suppressing hydrolysis. The protective structure is removed when the concentration of acidic monomers increases by air drying after application. This activates ARS, exerting the silane coupling effect.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Universal adhesive without acid resistant silane coupling agent | Active Comparator | Universal adhesive with normal silane (comparator) After the acid etching and rinsing and drying step, the universal adhesive with normal silane will be actively applied for 20 second , then light cured for 20 seconds then the restoration will be placed |
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| Universal adhesive with acid resistant silane coupling agent | Experimental | Universal adhesive with acid resistant silane coupling agent (Intervention) After the acid etching and rinsing and drying step, the universal adhesive with acid resistant silane coupling agent will be actively applied for 20 second , then light cured for 20 seconds then the restoration will be placed |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| universal adhesive without Acid resistant silane coupling agent | Procedure | After cavity preparations, enamel margins will be etched for 30 seconds then rinsed and dried, then the Universal adhesive without acid resistant silane coupling agent will be actively applied for 20 seconds then air thinned for 5 seconds then cured for 20 seconds.Then the composite restoration will be placed. |
| Measure | Description | Time Frame |
|---|---|---|
| Retention (Success rate) | Alpha (A) Present Bravo (B) Partial loss but clinically acceptable Charlie (C)Clinically unacceptable partial loss or absent | T0=baseline 24 hours postoperative. T1=12 months postoperative. T2=18 months postoperative. |
| 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=12 months postoperative. T2=18 months postoperative. |
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Inclusion Criteria:
Participants Inclusion:
• Adults aging from 21-67 years old who were in need of restoration of at least one notch-shaped cervical lesion
Teeth Inclusion:
Exclusion Criteria:
Participants Exclusion:
Teeth Exclusion:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Ahmed El-Kotaby, Master | Contact | Egypt +201150961970 | ahmed.elkotaby@dentistry.cu.edu.eg |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Cairo University | Cairo | Egypt |
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| ID | Term |
|---|---|
| D003731 | Dental Caries |
| D017213 | Root Caries |
| ID | Term |
|---|---|
| D017001 | Tooth Demineralization |
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| universal adhesive with Acid resistant silane coupling agent | Procedure | After cavity preparations, enamel margins will be etched for 30 seconds then rinsed and dried, then the Universal adhesive which contains acid resistant silane coupling agent will be actively applied for 20 seconds then air thinned for 5 seconds then cured for 20 seconds.Then the composite restoration will be placed. |
|
| 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=12 months postoperative. T2=18 months postoperative. |
| Secondary caries | Alpha (A) No active caries present Charlie(C) Active caries is present in contact with the restoration | T0=baseline 24 hours postoperative. T1=12 months postoperative. T2=18 months postoperative. |