Altassan Mosa, Alsulimani Osamah, Alzahrani Bashayer M, Alghanemi Abdulmajeed, Abukhudhayr Abdullah, Alharbi Shooq, Munshi Nabeel
Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, SAU.
Department of Oral Diagnostic Sciences, Faculty of Dentistry, King Abdulaziz University, Jeddah, SAU.
Cureus. 2024 Feb 13;16(2):e54137. doi: 10.7759/cureus.54137. eCollection 2024 Feb.
Introduction There is a growing demand for post and core systems that offer both ease of use and efficiency. Recently introduced dual-cure build-up and post cement materials exhibit properties similar to dentin. The objective of this laboratory experiment is to compare the fracture resistance among three distinct post and core systems and identify the locations of failures within each group. Material and methods This in vitro experimental study involved 30 epoxy resin-based blocks (Endo Training Bloc J, Dentsply Sirona, Ballaigues, Switzerland) divided into three groups: The first group was a post space preparation and restoration with a fiber post (RelyX™ Fiber Post, 3M ESPE, Saint Paul, Minnesota, United States) 1.6 mm in diameter and 10 mm in length (Group A) where core build-up and cementation were performed using a dual-cure build-up and cement for endodontic post resin material (Core X Flow, Dentsply DeTrey, Konstanz, Germany). The second group was a post space preparation and restoration using a dual-cure build-up and cement for endodontic post resin material, 10 mm in length filled with resin but without fiber post placement (Group B). The third group was where post space and core were filled and restored with a dual-cure build-up and cement for endodontic post resin material, 5 mm in length and without fiber post placement (Group C). Subsequently, samples were mounted and tested using a universal testing machine (Instron, Canton, Massachusetts, United States), and the fracture site was located. Results Significant differences were identified among the three groups, indicating the impact of both post length and type on fracture resistance (p-value <0.05). Group B exhibited the highest mean compressive strength resistance and maximum load at 899.3330 (N), followed by Group C at 848.9690 (N) and Group A at 751.9620 (N). The predominant failures in the samples were core fractures or debonding of the core material. Conclusion All-resin posts demonstrated high fracture resistance, unlike fiber posts which displayed inferior fracture resistance.
引言 对兼具易用性和高效性的桩核系统的需求日益增长。最近推出的双固化堆塑和桩核粘结材料表现出与牙本质相似的性能。本实验室实验的目的是比较三种不同桩核系统的抗折性，并确定每组内的失效位置。
材料与方法 本体外实验研究使用了30个环氧树脂基块（Endo Training Bloc J，登士柏西诺德，瑞士巴莱格），分为三组：第一组是使用直径1.6毫米、长度10毫米的纤维桩（RelyX™ Fiber Post，3M ESPE，美国明尼苏达州圣保罗）进行桩道预备和修复（A组），其中使用双固化堆塑和根管桩树脂材料粘结剂（Core X Flow，登士柏德特雷，德国康斯坦茨）进行核的堆塑和粘结。第二组是使用双固化堆塑和根管桩树脂材料粘结剂进行桩道预备和修复，长度为10毫米，填充树脂但未放置纤维桩（B组）。第三组是使用双固化堆塑和根管桩树脂材料粘结剂填充并修复桩道和核，长度为5毫米，未放置纤维桩（C组）。随后，将样本安装在万能试验机（Instron，美国马萨诸塞州坎顿）上进行测试，并确定骨折部位。
结果 三组之间存在显著差异，表明桩的长度和类型对抗折性均有影响（p值<0.05）。B组表现出最高的平均抗压强度和最大载荷，为899.3330（N），其次是C组，为848.9690（N），A组为751.9620（N）。样本中的主要失效形式是核骨折或核材料脱粘。
结论 全树脂桩表现出较高的抗折性，而纤维桩的抗折性较差。
