三种美学 CAD-CAM 桩核修复体的抗折强度和破坏模式。
Fracture resistance and failure mode of three esthetic CAD-CAM post and core restorations.
机构信息
Division of Fixed Prosthodontics, Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, P. O. Box: 21527, Champollion St., Azarita, Alexandria, Egypt.
出版信息
BMC Oral Health. 2024 May 3;24(1):523. doi: 10.1186/s12903-024-04273-y.
BACKGROUND
The rising demand for improved aesthetics has driven the utilization of recently introduced aesthetic materials for creating custom post and core restorations. However, information regarding the fracture resistance of these materials remains unclear, which limits their practical use as custom post and core restorations in clinical applications. AIM OF THE STUDY: This study aimed to evaluate the fracture resistance of three non-metallic esthetic post and core restorations and their modes of failure.
MATERIALS AND METHODS
Thirty-nine single-rooted human maxillary central incisors were endodontically treated. A standardized post space preparation of 9mm length was performed to all teeth to receive custom-made post and core restorations. The prepared teeth were randomly allocated to receive a post and core restoration made of one of the following materials (n=13): glass fiber-reinforced composite (FRC), polyetheretherketone (PEEK) and polymer-infiltrated ceramic-network (PICN). An intraoral scanner was used to scan all teeth including the post spaces. Computer-aided design and computer-aided manufacturing (CAD-CAM) was used to fabricate post and core restorations. Post and core restorations were cemented using self-adhesive resin cement. All specimens were subjected to fracture resistance testing using a universal testing machine. Failure mode analysis was assessed using a stereomicroscope and SEM. The data was statistically analyzed using One-Way ANOVA test followed by multiple pairwise comparisons using Bonferroni adjusted significance level.
RESULTS
Custom PEEK post and core restorations displayed the least fracture load values at 286.16 ± 67.09 N. In contrast, FRC exhibited the highest average fracture load at 452.60 ± 105.90 N, closely followed by PICN at 426.76 ± 77.99 N. In terms of failure modes, 46.2% of specimens with PICN were deemed non-restorable, while for PEEK and FRC, these percentages were 58.8% and 61.5%, respectively.
CONCLUSIONS
Within the limitation of this study, both FRC and PICN demonstrated good performance regarding fracture resistance, surpassing that of PEEK.
背景
对美学改善的需求不断增加，推动了最近引入的美学材料在定制桩核修复中的应用。然而，这些材料抗折性能的相关信息尚不清楚，这限制了它们在临床应用中作为定制桩核修复的实际使用。
目的
本研究旨在评估三种非金属美学桩核修复体的抗折性能及其失效模式。
材料和方法
对 39 颗上颌中切牙进行根管治疗。所有牙齿均进行标准化的 9mm 长度的桩腔预备，以接受定制桩核修复体。预备后的牙齿随机分配接受以下材料之一制成的桩核修复体（n=13）：玻璃纤维增强复合材料（FRC）、聚醚醚酮（PEEK）和聚合物渗透陶瓷网络（PICN）。使用口腔内扫描仪扫描所有包括桩腔的牙齿。使用计算机辅助设计和计算机辅助制造（CAD-CAM）技术制作桩核修复体。使用自粘接树脂水门汀粘结桩核修复体。所有样本均在万能试验机上进行抗折强度测试。使用立体显微镜和 SEM 评估失效模式分析。使用单因素方差分析（One-Way ANOVA）检验对数据进行统计学分析，然后使用 Bonferroni 调整的显著性水平进行多重两两比较。
结果
定制 PEEK 桩核修复体的断裂负荷值最小，为 286.16 ± 67.09N。相比之下，FRC 的平均断裂负荷最高，为 452.60 ± 105.90N，紧随其后的是 PICN，为 426.76 ± 77.99N。就失效模式而言，46.2%的 PICN 样本被认为不可修复，而 PEEK 和 FRC 的这一比例分别为 58.8%和 61.5%。
结论
在本研究的限制范围内，FRC 和 PICN 的抗折性能均优于 PEEK。
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