Evaluation of Resin Composite Posterior Restorations Using Modeling Resin Insertion Technique in Class I Lesions
NCT ID: NCT05801458
Last Updated: 2023-04-06
Study Results
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Basic Information
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UNKNOWN
NA
50 participants
INTERVENTIONAL
2023-05-01
2024-11-01
Brief Summary
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Detailed Description
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One of the main drawbacks of sculpting composite restorations is that some materials are sticky, reducing the ease of handling and insertion of the material into the tooth cavity. Some materials readily adhere to the composite instruments; thus, limiting reestablishment of the shape and anatomical contour of the tooth. As a result, the application of lubricants on the composite instrument such as modeling liquids/resins between the layers of composite have been proposed.
Rationale Modeling resins can be directly applied between the layers using a brush or can be used as a lubricant on manual instruments. In both the aforementioned techniques, the ease of instrumentation during the placement of esthetic restorations is superior, compared to the traditional restorative techniques. Moreover, any pores or gaps on the surface of the composite placed by means of the layering technique can be easily resolved. Hence, the modeling resin facilitates the reduction of defects in the body of the restoration and aids in improving the mechanical properties.
Although these methods are widely used, a potential shortcoming is that these techniques may adversely affect the physical and surface properties of the resin composite. However, it is unknown whether different compositions of adhesives or modeling agents may affect the surface microhardness, surface roughness, and color stability of composites over time.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Study Groups
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Modeling Resin Insertion Technique
Resin Composite (Tetric® N-Ceram Nano-hybrid incremental composite) / Wetting Agent (Modeling Resin, Bisco)
Modeling Resin Insertion Technique
One drop of modeling resin will be dispensed into a clean mixing well. Following the placement of the resin composite into the prepared site, a composite instrument (round-ended plugger with a diameter of 2 mm) will be dipped into the modeling resin. With modeling resin on the instrument, the resin composite is sculpted and manipulated to the desired shape. This will be repeated with each increment. Each increment will be polymerized for 20 sec with a LED light-curing unit.
Conventional Resin Composite Incremental Placement Technique
Conventional resin composite incremental placement technique (Tetric® N-Ceram Nano-hybrid incremental composite)
Conventional resin composite Incremental Placement Technique
A three-step etch-and-rinse adhesive system will be used according to the manufacturer's instructions. 37.5% phosphoric acid (Kerr Co, Orange, CA, USA) will be applied to the enamel and dentin for a period of 30 s and 15 s, respectively. Subsequently the cavities will then be rinsed with an air/water spray for 15 s. A layer of primer will be applied to the dentin for 30 sec, afterward gentle air-drying for 5 sec. Then, the bond (AdheSE adhesive) will be applied on the enamel and dentin and light cured with a LED curing unit for about 30 sec. Tetric N-Ceram will then be applied using an incremental filling technique, each increment will not exceed 2mm in thickness. Each increment will be polymerized for 20 sec with a LED light-curing unit.
Interventions
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Modeling Resin Insertion Technique
One drop of modeling resin will be dispensed into a clean mixing well. Following the placement of the resin composite into the prepared site, a composite instrument (round-ended plugger with a diameter of 2 mm) will be dipped into the modeling resin. With modeling resin on the instrument, the resin composite is sculpted and manipulated to the desired shape. This will be repeated with each increment. Each increment will be polymerized for 20 sec with a LED light-curing unit.
Conventional resin composite Incremental Placement Technique
A three-step etch-and-rinse adhesive system will be used according to the manufacturer's instructions. 37.5% phosphoric acid (Kerr Co, Orange, CA, USA) will be applied to the enamel and dentin for a period of 30 s and 15 s, respectively. Subsequently the cavities will then be rinsed with an air/water spray for 15 s. A layer of primer will be applied to the dentin for 30 sec, afterward gentle air-drying for 5 sec. Then, the bond (AdheSE adhesive) will be applied on the enamel and dentin and light cured with a LED curing unit for about 30 sec. Tetric N-Ceram will then be applied using an incremental filling technique, each increment will not exceed 2mm in thickness. Each increment will be polymerized for 20 sec with a LED light-curing unit.
Eligibility Criteria
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Inclusion Criteria
1. Adult Patients (25-45).
2. Good oral hygiene (plaque index score 0 or 1).
3. Absence of damaging habits (e.g. bruxism, nail biting, tooth clenching and mouth breathing).
Teeth:
1. Vital teeth with a normal appearance and morphology.
2. Primary carious lesions in molar teeth.
Exclusion Criteria
1. Patients with bad oral hygiene.
2. Patients with known allergic or adverse reaction to the tested materials.
3. Any uncontrolled systemic disease, pregnant or lactating women and any patient incapable to be present at recall follow up visits.
Teeth:
1. Non-vital, fractured, or cracked teeth.
2. Teeth with secondary caries or in need of replacement of existing restorations.
3. Defective restorations adjacent to or opposite the tooth restored in the study.
4. Rampant caries, atypical extrinsic staining of teeth.
25 Years
45 Years
ALL
Yes
Sponsors
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Cairo University
OTHER
Responsible Party
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Amira Ahmed Mahmoud Mohamed
Operator, main investigator and corresponding author
Principal Investigators
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Mostafa Abdelhamid, Professor-Cairo University
Role: STUDY_DIRECTOR
Cairo University
Central Contacts
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References
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Other Identifiers
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Modeling Resin
Identifier Type: -
Identifier Source: org_study_id
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