Does air abrasion improve the retention of restorations in non-carious cervical lesions? An 18-month split-mouth randomized controlled trial

Resumo original em inglês

O que aconteceu

To evaluate whether dentin airborne-particle abrasion (APA) with aluminum oxide affects the retention and clinical performance of composite resin restorations in non-carious cervical lesions (NCCLs).

This prospective, randomized, split-mouth, double-blind controlled trial included 63 participants and 126 restorations presenting at least two similar NCCLs. Restorations were randomized and allocated to either a control protocol using a universal adhesive in selective enamel etching mode and restored with bulk-fill composite resin, or to the same protocol preceded by APA preceded by airborne-particle abrasion with 50 μm aluminum oxide particles applied for 10 s at 5 bar pressure. All restorations were placed under rubber dam isolation using standardized procedures. Evaluations were performed at baseline, 6 months, and 18 months using FDI and modified USPHS criteria. The primary outcome was retention/fracture; secondary outcomes included marginal staining, marginal adaptation, postoperative sensitivity, and secondary caries. Survival was analyzed using Kaplan-Meier estimates and compared with log-rank tests. The primary inferential analysis used Cox proportional hazards regression with robust standard errors clustered by patient. Secondary outcomes were compared using McNemar's test (α = 0.05).

O que encontraram

After 18 months, six restorations were lost (Control: 1; APA: 5). Kaplan-Meier estimates showed high retention in both groups (Control: 96.7%, 95% CI: 92.4 to 100.0; APA: 90.3%, 95% CI: 83.3 to 98.0). The clustered Cox model indicated a higher, but not statistically significant, hazard of failure for the APA group (HR = 3.03; 95% CI: 0.74-12.37; p = 0.122). No significant differences were observed for marginal staining, marginal adaptation, postoperative sensitivity, or secondary caries.

Por que isso importa

Under the parameters tested, dentin airborne-particle abrasion did not improve the clinical performance of composite restorations in NCCLs over 18 months.

Air-abrasion of dentin in non-carious cervical lesions does not improve the clinical performance of composite resin restorations over 18 months, suggesting that this step may be unnecessary in routine practice.

Resumo publicado sob licença CC BY. A tradução para o português ainda não chegou a este estudo.