IADR Abstract Archives
Influence of Shape and Restorations on NCCL under Cyclic Stress
Objectives: Resin composites are strongly recommended due to their good bonding abilities and cavity adaptation to the cyclic stress in Non-carious cervical lesions (NCCLs).
This study aimed to 1. compare the effectiveness and efficiency of conventional, and bulkfill flowable composite resin. 2. evaluate the performance and longevity of non-carious cervical lesions restoration using incremental and bulk-fill technique.
Methods: Simulation model: True-scale 3D model of the maxillary first premolar from CBCT images was used to model and analyze the distribution affected by various restoration patterns using Finite Element Analysis (FEA). In-vitro study: Extracted human maxillary first premolars were prepared with diamond bur to simulate NCCL. The teeth were prepared into horizontal-round shaped. The selected teeth were separated into 2 groups; (1) filled with Filtek™ Z350 XT using incremental technique and (2) filled with Filtek™ Bulk Fill Flowable using bulk-fill technique. Each specimen was subjected to a 60 N load at a frequency of 15 Hz for 4.8 million cycles. Then, the samples were scanned by micro-CT. Paired images were aligned and analysed using 3D slicer and ImageJ. 2D and 3D microleakages were calculated from the images. Statistical analysis were performed by SPSS.
Results: Simulation results revealed after restoration, there were no significant difference (p<0.05) between the two types of composite resins regarding effectiveness and efficiency. Likewise, there were no statistically difference (p<0.05) between incremental and bulk fill filling technique regarding longevity and performance.
Conclusions: The longevity of NCCLs restorations were not affected by filling techniques. Moreover, different types of composites have similar to no difference regarding microleakage and stress distribution. However, technique sensitivity and moisture control in clinical situation should also be considered.
This study aimed to 1. compare the effectiveness and efficiency of conventional, and bulkfill flowable composite resin. 2. evaluate the performance and longevity of non-carious cervical lesions restoration using incremental and bulk-fill technique.
Methods: Simulation model: True-scale 3D model of the maxillary first premolar from CBCT images was used to model and analyze the distribution affected by various restoration patterns using Finite Element Analysis (FEA). In-vitro study: Extracted human maxillary first premolars were prepared with diamond bur to simulate NCCL. The teeth were prepared into horizontal-round shaped. The selected teeth were separated into 2 groups; (1) filled with Filtek™ Z350 XT using incremental technique and (2) filled with Filtek™ Bulk Fill Flowable using bulk-fill technique. Each specimen was subjected to a 60 N load at a frequency of 15 Hz for 4.8 million cycles. Then, the samples were scanned by micro-CT. Paired images were aligned and analysed using 3D slicer and ImageJ. 2D and 3D microleakages were calculated from the images. Statistical analysis were performed by SPSS.
Results: Simulation results revealed after restoration, there were no significant difference (p<0.05) between the two types of composite resins regarding effectiveness and efficiency. Likewise, there were no statistically difference (p<0.05) between incremental and bulk fill filling technique regarding longevity and performance.
Conclusions: The longevity of NCCLs restorations were not affected by filling techniques. Moreover, different types of composites have similar to no difference regarding microleakage and stress distribution. However, technique sensitivity and moisture control in clinical situation should also be considered.