- European Oral Research
- Vol: 56 Issue: 1
- The effect of composite placement technique on the internal adaptation, gap formation and microshear...
The effect of composite placement technique on the internal adaptation, gap formation and microshear bond strength
Authors : Cem Peşkersoy, Duygu Recen, Hande Kemaloglu
Pages : 10-16
Doi:10.26650/eor.2022897456
View : 11 | Download : 4
Publication Date : 2022-01-31
Article Type : Research
Abstract :Purpose: This study aimed to compare the efficiency of placement technique on internal adaptation, gap formation and microshear bond strength (µSBS) of bulk-fill composite resin materials. Materials and methods: Standardized class V cavities were prepared for microcomputed tomography (mCT) test and divided into four groups (n=12) as follows: Group SDR: Smart Dentin Replacement system/bulk fill; Group SF2: Sonic-Fill system/bulk fill sonic-activated composite placement system; Group CHU: Herculite-XRV-Ultra composite resin inserted with Compothixo/sonic-vibrated composite resin placement system; Group HIT: Herculite-XRVUltra composite resin applied with incremental technique. Self-etch adhesive (Optibond-XTR) was used for bonding in all groups. After 10000 thermocycling, mCT scans were taken to reveal gap formation at the tooth-restoration interface and universal testing machine was used to test microshear bond strength (µSBS) values (n=10). ANOVA, post-hoc Bonferroni and Tukey HSD tests were used for evaluating the gap formation and µSBS values (p=0.05). Results: SF2 and CHU showed the best adaptability compared with both SDR and HIT. The difference between groups SDR and HIT was statistically significant (p<0.05). µSBS values were found to be the highest for SF2, and the lowest for HIT groups (p>0.05). Conclusions: Bulk-fill composite resins placed either with sonic-activated or sonic-vibrated instrument demonstrated better adaptability, less gap formation and higher bond strength than both the bulk-fill flowable composite and conventional incremental techniques.Keywords : bulk-fill composite, microcomputed tomography, gap formation, bond strength, sonic instrumentation