Journal of prosthodontic research · 2026
Effect of thermal cycling on the flexural properties of resin composite and PEEK CAD-CAM blocks for molar crowns.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Kato Yukako, Nagata Shunsuke, Tanimoto Yasuhiro
Аннотация
PURPOSE: This study evaluates and compares the flexural properties of computer-aided design-computer-aided manufacturing (CAD-CAM) resin composite and polyetheretherketone (PEEK) blocks used for molar crowns under three storage conditions. Furthermore, the relationship between the inorganic filler content (>70 wt. %) and the flexural properties of the resin composite blocks was clarified.
METHODS: Five commercially available resin composite blocks and one PEEK block were subjected to three storage conditions: dry storage, water immersion for 7 d at 37 °C, and 10,000 thermal cycles between 5 and 55 °C. The flexural strength and flexural modulus were analyzed using two-way ANOVA, followed by Tukey's post-hoc comparisons. The inorganic filler content and water sorption were analyzed via one-way ANOVA and the Tukey-Kramer post-hoc test, with the level of significance set at 5%.
RESULTS: The resin composite blocks exhibited a significantly higher flexural strength and flexural modulus than the PEEK block. A positive correlation was observed between the inorganic filler content and the flexural properties of the CAD-CAM blocks, specifically for the flexural strength (r = 0.49) and flexural modulus (r = 0.63). However, the PEEK block exhibited the lowest water sorption and minimal flexural properties changes across all conditions, as compared to the resin composite blocks.
CONCLUSIONS: Both the inorganic filler content and matrix resin composition influenced the flexural properties of the CAD-CAM crown materials. PEEK demonstrated superior durability under thermal and humid conditions, indicating its potential as a long-term restorative material for posterior crowns.
METHODS: Five commercially available resin composite blocks and one PEEK block were subjected to three storage conditions: dry storage, water immersion for 7 d at 37 °C, and 10,000 thermal cycles between 5 and 55 °C. The flexural strength and flexural modulus were analyzed using two-way ANOVA, followed by Tukey's post-hoc comparisons. The inorganic filler content and water sorption were analyzed via one-way ANOVA and the Tukey-Kramer post-hoc test, with the level of significance set at 5%.
RESULTS: The resin composite blocks exhibited a significantly higher flexural strength and flexural modulus than the PEEK block. A positive correlation was observed between the inorganic filler content and the flexural properties of the CAD-CAM blocks, specifically for the flexural strength (r = 0.49) and flexural modulus (r = 0.63). However, the PEEK block exhibited the lowest water sorption and minimal flexural properties changes across all conditions, as compared to the resin composite blocks.
CONCLUSIONS: Both the inorganic filler content and matrix resin composition influenced the flexural properties of the CAD-CAM crown materials. PEEK demonstrated superior durability under thermal and humid conditions, indicating its potential as a long-term restorative material for posterior crowns.