{"title":"Antagonistic Primary Tooth Wear Caused by Opposing BioFLX<sup>®</sup>, Zirconia, and Stainless Steel Crowns: Chewing Cycle Simulation Study.","authors":"Pragati Pareek, Sunnypriyatham Tirupathi, Karuna Kumari, Lamea Afnan","doi":"10.5005/jp-journals-10005-3161","DOIUrl":null,"url":null,"abstract":"<p><strong>Introduction: </strong>The choice of crown material for primary teeth restorations is crucial in pediatric dentistry, as it impacts both the restoration's longevity and the wear on opposing teeth. This study aimed to compare the wear on primary teeth and their antagonists when opposed by zirconia, BioFLX®, and stainless steel crowns (SSCs), using a multiaxis computer-controlled chewing simulator (SD Mechatronik CS-4.4) to replicate masticatory mechanisms and forces.</p><p><strong>Materials and methods: </strong>Primary teeth specimens were mounted and paired with opposing preformed crowns of zirconia, BioFLX®, and stainless steel (SS). These pairs were subjected to 2,40,000 chewing cycles using a chewing simulator, simulating 1 year of oral chewing conditions. The volumetric wear of the crowns and their antagonists was measured using digital scanning (Medit Lab scanner) both pre- and postsimulation. Data were analyzed using the Wilcoxon signed-rank test, Kruskal-Wallis test, and Mann-Whitney <i>U</i> test to assess intra- and intergroup differences.</p><p><strong>Results: </strong>After 2,40,000 chewing cycles, antagonistic wear varied significantly among crown materials (<i>p</i> = 0.006), with zirconia antagonist causing the highest wear (1.00 mm<sup>3</sup>), followed by SS antagonist (0.58 mm<sup>3</sup>), and BioFLX® antagonist (0.24 mm<sup>3</sup>), which caused the least wear. Crown wear differences were not statistically significant (<i>p</i> = 0.147), with zirconia crowns exhibiting a volume reduction of 0.26 mm<sup>3</sup>, BioFLX® crowns 0.48 mm<sup>3</sup>, and SSCs 0.11 mm<sup>3</sup>. BioFLX® demonstrated superior performance in minimizing antagonistic wear.</p><p><strong>Conclusion: </strong>Primary teeth opposed by BioFLX® crowns exhibited the least wear, making it the most favorable material for minimizing antagonistic tooth wear. SSCs caused moderate wear, while zirconia crowns resulted in the highest wear on opposing primary teeth. These findings suggest that BioFLX® is a promising option for pediatric restorations, as it better preserves primary tooth structure. Clinicians should consider these results when choosing crown materials to ensure optimal long-term outcomes in pediatric patients.</p><p><strong>How to cite this article: </strong>Pareek P, Tirupathi S, Kumari K, <i>et al.</i> Antagonistic Primary Tooth Wear Caused by Opposing BioFLX<sup>®</sup>, Zirconia, and Stainless Steel Crowns: Chewing Cycle Simulation Study. Int J Clin Pediatr Dent 2025;18(7):784-791.</p>","PeriodicalId":36045,"journal":{"name":"International Journal of Clinical Pediatric Dentistry","volume":"18 7","pages":"784-791"},"PeriodicalIF":0.0000,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12486498/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Clinical Pediatric Dentistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5005/jp-journals-10005-3161","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/20 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"Dentistry","Score":null,"Total":0}
引用次数: 0
Abstract
Introduction: The choice of crown material for primary teeth restorations is crucial in pediatric dentistry, as it impacts both the restoration's longevity and the wear on opposing teeth. This study aimed to compare the wear on primary teeth and their antagonists when opposed by zirconia, BioFLX®, and stainless steel crowns (SSCs), using a multiaxis computer-controlled chewing simulator (SD Mechatronik CS-4.4) to replicate masticatory mechanisms and forces.
Materials and methods: Primary teeth specimens were mounted and paired with opposing preformed crowns of zirconia, BioFLX®, and stainless steel (SS). These pairs were subjected to 2,40,000 chewing cycles using a chewing simulator, simulating 1 year of oral chewing conditions. The volumetric wear of the crowns and their antagonists was measured using digital scanning (Medit Lab scanner) both pre- and postsimulation. Data were analyzed using the Wilcoxon signed-rank test, Kruskal-Wallis test, and Mann-Whitney U test to assess intra- and intergroup differences.
Results: After 2,40,000 chewing cycles, antagonistic wear varied significantly among crown materials (p = 0.006), with zirconia antagonist causing the highest wear (1.00 mm3), followed by SS antagonist (0.58 mm3), and BioFLX® antagonist (0.24 mm3), which caused the least wear. Crown wear differences were not statistically significant (p = 0.147), with zirconia crowns exhibiting a volume reduction of 0.26 mm3, BioFLX® crowns 0.48 mm3, and SSCs 0.11 mm3. BioFLX® demonstrated superior performance in minimizing antagonistic wear.
Conclusion: Primary teeth opposed by BioFLX® crowns exhibited the least wear, making it the most favorable material for minimizing antagonistic tooth wear. SSCs caused moderate wear, while zirconia crowns resulted in the highest wear on opposing primary teeth. These findings suggest that BioFLX® is a promising option for pediatric restorations, as it better preserves primary tooth structure. Clinicians should consider these results when choosing crown materials to ensure optimal long-term outcomes in pediatric patients.
How to cite this article: Pareek P, Tirupathi S, Kumari K, et al. Antagonistic Primary Tooth Wear Caused by Opposing BioFLX®, Zirconia, and Stainless Steel Crowns: Chewing Cycle Simulation Study. Int J Clin Pediatr Dent 2025;18(7):784-791.