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Background And Aim: To analyze the outcome of fiber placement and orientation over fracture resistance in wide Class II (Mesio-occluso-distal [MOD]) cavities prepared on maxillary premolars.
Materials And Methods: After selection of 120 extracted human maxillary premolars, Class II (MOD) cavities were prepared maintaining uniform dimensions and samples were divided into six groups randomly ( = 20 each): Group I, G-aenial posterior; Group II, G-aenial posterior + Horizontal Ribbond placement on gingival and pulpal floor; Group III, G-aenial posterior + Horizontal Ribbond placement only on pulpal floor; Group IV, G-aenial posterior + vertical Ribbond placement on gingival and pulpal floor; Group V, G-aenial posterior + Ribbond chips; Group VI, Ever-X posterior. After restorations and completion of thermocycling process, universal testing machine measured the fracture resistance of all samples. Fracture modes were inspected under stereomicroscope. Analyzation of data was performed using one-way ANOVA and Tukey test at significance levels of < 0.05.
Results: Fiber placement significantly increased fracture resistance. The highest fracture resistance was shown by Group 2 (1288.8 N) followed by Group 3 (976 N), group 4 (942.3 N), Group 5 (876.3 N), and Group 6 (833 N). Group 1 (No Fiber group) showed the least fracture resistance of 588.41 N. Repairable fractures were seen highest with Group 2 (80%) followed by Group 6 (70%) and least in Group 1 (30%).
Conclusions: Horizontal orientation of polyethylene fiber on both pulpal and gingival floor of MOD cavities gives the highest fracture resistance in maxillary premolars and repairable mode of fracture.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9205354 | PMC |
| http://dx.doi.org/10.4103/jcd.jcd_384_21 | DOI Listing |
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