Hazar Ecehan, Hazar Ahmet
Department of Endodontics, Faculty of Dentistry, Zonguldak Bülent Ecevit University, 67600 Zonguldak, Turkey.
Department of Restorative Dentistry, Faculty of Dentistry, Zonguldak Bülent Ecevit University, 67600 Zonguldak, Turkey.
Polymers (Basel). 2025 Jan 29;17(3):370. doi: 10.3390/polym17030370.
This in vitro study evaluated short-fiber-reinforced composite materials and fiber-reinforced restorations of endodontically treated molars with furcal perforation. The endodontic treatment and mesio-occlusal-distal cavity preparation of 126 two-rooted mandibular third molars were performed. Eighteen non-perforated teeth were restored with resin composite as the control group. Furcal perforations and repair were performed on 108 teeth that were divided into six experimental groups: resin composite (RC), everX Flow (EXF), everX Posterior (EXP), Bioblock (BB), modified transfixed (MT), and horizontal glass-fiber (HGF) groups (n = 18). Fracture resistance tests were performed at an angle of 30◦ using a universal testing machine under static loading, and fracture patterns were classified. Welch's analysis of variance, Pearson chi-square, and Tamhane post hoc tests ( = 0.05) were used to analyze the data ( = 0.05). The highest fracture resistance values were seen with the HGF (596.305 N), followed by MT (540.365 N), BB (477.906 N), EXP (476.647 N), EXF (414.462 N), control (413.811 N), and RC (335.325 N) groups ( < 0.001). There was no significant difference between the BB and EXP groups or between the EXF and control groups ( > 0.05). In terms of the dominant fracture pattern, the HGF and MT groups were repairable and possibly repairable, whereas the control, RC, and EXP groups were unrepairable. The EXF and BB groups were almost equally divided between possibly repairable and unrepairable. Restorations using horizontal fiber techniques and short-fiber-reinforced materials increased the fracture resistance of endodontically treated teeth with furcal perforation.
这项体外研究评估了短纤维增强复合材料以及根管治疗后发生根分叉穿孔的磨牙的纤维增强修复体。对126颗双根下颌第三磨牙进行了根管治疗和近中-咬合-远中窝洞预备。18颗未穿孔的牙齿用树脂复合材料修复作为对照组。对108颗牙齿进行根分叉穿孔及修复，将其分为六个实验组：树脂复合材料（RC）组、everX Flow（EXF）组、everX Posterior（EXP）组、Bioblock（BB）组、改良贯穿固定（MT）组和水平玻璃纤维（HGF）组（n = 18）。使用万能试验机在静态加载下以30°角进行抗折试验，并对骨折模式进行分类。采用Welch方差分析、Pearson卡方检验和Tamhane事后检验（α = 0.05）分析数据（α = 0.05）。HGF组的抗折强度值最高（596.305 N），其次是MT组（540.365 N）、BB组（477.906 N）、EXP组（476.647 N）、EXF组（414.462 N）、对照组（413.811 N）和RC组（335.325 N）（P < 0.001）。BB组和EXP组之间以及EXF组和对照组之间无显著差异（P > 0.05）。就主要骨折模式而言，HGF组和MT组可修复且可能可修复，而对照组、RC组和EXP组不可修复。EXF组和BB组在可能可修复和不可修复之间几乎平分。使用水平纤维技术和短纤维增强材料进行修复可提高根管治疗后根分叉穿孔牙齿的抗折强度。
