Influences of Gingival Cord Retractor in Retention Rate of Non-carious Cervical Lesions Restorations.

Federal University of Uberlandia

Status: Unknown

Conditions: Tooth Wear; Dental Wear

Treatments: Procedure: Wash and dry; Procedure: Selective enamel etched; Procedure: Enamel and dentin etched; Procedure: Gingival displacement; Device: Total-etch adhesive system; Procedure: Photoactivated; Device: self-conditioning adhesive system

Study type: Interventional

Funder types: Other

Identifiers

NCT02961049

CAAE - 57032016.0.0000.5152

Details and patient eligibility

About

The aim of this study is through a randomized clinical trial, double blind, splith-mouth, evaluate the retention rate of restorative protocols of Non-carious cervical lesion. The presence of gingival displacement with a retraction cord (yes or no) and the category of adhesive system (etch-and-rise and self-etching) will be evaluated. Data will be collected, tabulated and submitted to statistical analysis.

Full description

Cervical wear is classified as a noncarious cervical lesion (NCCL), which is a pathological process characterized by loss of dental hard tissues near the cementoenamel junction (CEJ). The aim of this study is through a randomized clinical trial, double blind, splith-mouth, evaluate the retention rate of restorative protocols of Non-carious cervical lesion. The presence of gingival displacement with a retraction cord and the category of adhesive system will be evaluated. Two hundred and twenty teeth, with NCCL of depth greater than 1.5mm, of 55 healthy patients of both sexes will be select. The teeth will be randomly divided into 4 different groups according to the gingival displacement with retraction cord (yes or no) and adhesive system category (etch-and-rise and self-etching). Data will be collected, tabulated and submitted to statistical analysis.

Enrollment: 55 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• Healthy volunteers; both genres; presence of at least four non carious cervical lesions of similar dimensions in the same arc and opposite quadrants; good oral hygiene.

Exclusion criteria

• Presence of cavities, cracks or enamel fractures; extensive or unsatisfactory restorations; recent restorations involving the labial surface; dentures or orthodontics; presence of periodontal disease and,or parafunctional habits; systemic disease and, or severe psychological; constant use of analgesic and, or anti-inflammatory or allergic response to dental products.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

---

55 participants in 4 patient groups

Retraction and total-etch

Active Comparator group

Description:

Gingival displacement with a gingival cord (#0, #00 or #000) prior to the restoration. Application of total-etch adhesive system: enamel and dentin etched with 35% phosphoric acid, wash, dry, two layers of primer/bond application with a brush and photoactivated for 20 seconds.

Treatment:

Procedure: Wash and dry

Procedure: Enamel and dentin etched

Device: Total-etch adhesive system

Procedure: Gingival displacement

Procedure: Photoactivated

No retraction and total-etch

Active Comparator group

Description:

Application of total-etch adhesive system: enamel and dentin etched with 35% phosphoric acid, wash, dry, two layers of primer/bond application with a brush and photoactivated for 20 seconds.

Treatment:

Procedure: Wash and dry

Procedure: Enamel and dentin etched

Device: Total-etch adhesive system

Procedure: Photoactivated

Retraction and self-conditioning

Active Comparator group

Description:

Gingival displacement with a gingival cord (#0, #00 or #000) prior to the restoration. Application of self-conditioning adhesive system: selective enamel etched with 35% phosphoric acid, wash, dry, one layer of acid/pirmer on enamel and dentin with a brush, one layer of bond with a brush and photoactivated for 20 seconds.

Treatment:

Procedure: Wash and dry

Device: self-conditioning adhesive system

Procedure: Selective enamel etched

Procedure: Gingival displacement

Procedure: Photoactivated

No retraction and self-conditioning

Active Comparator group

Description:

Application of self-conditioning adhesive system: selective enamel etched with 35% phosphoric acid, wash, dry, one layer of acid/pirmer on enamel and dentin with a brush, one layer of bond with a brush and photoactivated for 20 seconds.

Treatment:

Procedure: Wash and dry

Device: self-conditioning adhesive system

Procedure: Selective enamel etched

Procedure: Photoactivated