Fernandes Valter, Fidalgo-Pereira Rita, Edwards Jane, Silva Filipe, Özcan Mutlu, Carvalho Óscar, Souza Júlio C M
University Institute of Health Sciences (IUCS), Cooperativa Ensino Superior Universitário (CESPU), 4585-116 Gandra, Portugal.
Center for Interdisciplinary Research in Health (CIIS), Faculty of Dental Medicine (FMD), Universidade Católica Portuguesa (UCP), 3504-505 Viseu, Portugal.
Materials (Basel). 2024 May 23;17(11):2520. doi: 10.3390/ma17112520.
The purpose of the present study was to perform a preliminary analysis of the fitting of different fiber-reinforced composite (GFRC) posts to tooth root canals and determine the resin cement layer thickness. The following GFRC posts were assessed: bundle posts (Rebilda GT, VOCO, Germany), sleeve system (SAP, Angelus Ind, Brazil), and accessory posts (Reforpin, Angelus, Brazil). Twenty-four freshly extracted mandibular single-rooted pre-molars were endodontically treated and divided into six groups, according to the type of GFRC post and resin cement (self-adhesive or conventional dual-cured). Then, specimens were cross-sectioned and inspected by optical microscopy regarding the cement layer thickness and presence of defects such as pores, voids, or fissures were assessed. Bundle and accessory posts revealed a regular distribution of resin cement with a lower number of voids than found with sleeve systems. The sleeve system posts showed poor fitting at the apical portion of the root canals. The type of resin cement did not affect the thickness of the interface, although both bundle and accessory posts allow a better distribution of resin cement and fibers. The present preliminary study reveals interesting insights on the fitting of bundle and accessory posts to root dentin and resin cement layer thickness in oval-shape root canals. The sleeve system posts showed adequate fitting only at the coronal portion of the canals.
本研究的目的是对不同纤维增强复合材料（GFRC）桩与牙根根管的适配性进行初步分析，并确定树脂水门汀层的厚度。评估了以下几种GFRC桩：束状桩（Rebilda GT，VOCO，德国）、套筒系统（SAP，Angelus Ind，巴西）和辅助桩（Reforpin，Angelus，巴西）。选取24颗新鲜拔除的下颌单根前磨牙进行根管治疗，并根据GFRC桩的类型和树脂水门汀（自粘型或传统双固化型）分为六组。然后，将标本进行横断面切片，并通过光学显微镜检查水门汀层厚度，评估是否存在诸如孔隙、空洞或裂缝等缺陷。束状桩和辅助桩显示树脂水门汀分布规则，孔隙数量比套筒系统少。套筒系统桩在根管根尖部分的适配性较差。树脂水门汀的类型不影响界面厚度，尽管束状桩和辅助桩都能使树脂水门汀和纤维分布得更好。本初步研究揭示了关于束状桩和辅助桩与椭圆形根管牙本质的适配性以及树脂水门汀层厚度的有趣见解。套筒系统桩仅在根管冠部显示出合适的适配性。
