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 : 16 | Download : 7

Publication Date : 2022-01-31

Article Type : Research Paper

Abstract :Purpose: This study aimed to compare the efficiency of placement technique on internal adaptation, gap formation and microshear bond strength insert ignore into journalissuearticles values(µSBS); of bulk-fill composite resin materials. Materials and methods: Standardized class V cavities were prepared for microcomputed tomography insert ignore into journalissuearticles values(mCT); test and divided into four groups insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(µSBS); values insert ignore into journalissuearticles values(n=10);. ANOVA, post-hoc Bonferroni and Tukey HSD tests were used for evaluating the gap formation and µSBS values insert ignore into journalissuearticles 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 insert ignore into journalissuearticles values(p<0.05);. µSBS values were found to be the highest for SF2, and the lowest for HIT groups insert ignore into journalissuearticles values(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