Journal of conservative dentistry and endodontics · 2024
The fracture resistance of restored mandibular molars using different cavity designs: An in vitro comparative evaluation.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
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Ошибки и ограничения
История · было → стало
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Mitra Aditya, Sharma Snigdha, Bhattacharyya Anirban, Maity Asim Bikash, Majumder Gayatri, Datta Soham
Аннотация
BACKGROUND: The stress distribution of a restored tooth is different from that of an intact sound tooth. The fracture resistance of a restored tooth depends on cavity design, remaining tooth structure, and material used.
AIM: This in vitro study evaluated and compared the fracture resistance of mandibular molars restored using composite resin.
MATERIALS AND METHODS: Forty freshly extracted, intact mandibular molars were used, with their roots embedded in acrylic resin for stability. Cavities were prepared using a No. 2 round bur and straight fissure diamond, then divided into four groups with specific variations in cavity dimensions. Samples were tested using a universal testing machine, applying vertical load along the long axis at the central fossa to record fracture load.
STATISTICAL ANALYSIS: One-way analysis of variance and Tukey's post hoc analysis were used for statistical analysis.
RESULTS: Fracture resistance of the groups, listed in descending order, was: Lingual wall 1.5 mm (2417 ± 160 N) > Buccal wall 1.5 mm (2122 ± 75.9 N) > Lingual wall 1 mm (1966 ± 75.7 N) > Buccal wall 1 mm (1335 ± 216 N).
CONCLUSION: The lingual wall 1.5 mm exhibited the highest fracture resistance, while the buccal wall with 1 mm thickness showed the least resistance.
AIM: This in vitro study evaluated and compared the fracture resistance of mandibular molars restored using composite resin.
MATERIALS AND METHODS: Forty freshly extracted, intact mandibular molars were used, with their roots embedded in acrylic resin for stability. Cavities were prepared using a No. 2 round bur and straight fissure diamond, then divided into four groups with specific variations in cavity dimensions. Samples were tested using a universal testing machine, applying vertical load along the long axis at the central fossa to record fracture load.
STATISTICAL ANALYSIS: One-way analysis of variance and Tukey's post hoc analysis were used for statistical analysis.
RESULTS: Fracture resistance of the groups, listed in descending order, was: Lingual wall 1.5 mm (2417 ± 160 N) > Buccal wall 1.5 mm (2122 ± 75.9 N) > Lingual wall 1 mm (1966 ± 75.7 N) > Buccal wall 1 mm (1335 ± 216 N).
CONCLUSION: The lingual wall 1.5 mm exhibited the highest fracture resistance, while the buccal wall with 1 mm thickness showed the least resistance.