3D 打印托盘材料与弹性印模/黏附系统之间的剥离粘结强度：一项实验室研究。

Peel bond strength between 3D printing tray materials and elastomeric impression/adhesive systems: A laboratory study.

机构信息

University Hospital Tuebingen, Section Medical Materials Science and Technology, Osianderstr. 2-8, Tuebingen 72076, Germany; State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China; Department of Oral Prosthodontics I, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China.

Department of Prosthodontics at the University Clinic for Dentistry, Oral Medicine, and Maxillofacial Surgery, University Hospital Tuebingen, Osianderstr. 2-8, Tuebingen 72076, Germany.

出版信息

Dent Mater. 2020 Jul;36(7):e241-e254. doi: 10.1016/j.dental.2020.04.015. Epub 2020 May 23.

DOI:10.1016/j.dental.2020.04.015

PMID:32456949

Abstract

OBJECTIVES

The present study aimed to evaluate the bonding between three 3D printed custom tray materials and three elastomeric impression/adhesive systems using the peel test.

METHODS

Test blocks were 3D printed by three different technologies using Dental LT, FREEPRINT tray, and polylactide (PLA) tray materials. The reference test blocks were conventionally fabricated with Zeta Tray LC, a light-curing resin. The surface topographies of the four tray materials were investigated by scanning electron microscopy (SEM) analyses and roughness measurements. The peel bond strength between the four tray materials and three impression/adhesive systems, vinylsiloxanether (VSXE), vinyl polysiloxane (VPS), and polyether (PE), was measured (n=12 per group). The peeling failure modes and rupture sites were identified microscopically.

RESULTS

The four tray materials featured different surface topographies. The peel bond strength was not significantly different with VSXE and PE, but PLA and the reference showed higher peel bond strength with VPS than the Dental LT and FREEPRINT tray (p<0.05). The rupture site of adhesive failure in all groups was partly at the adhesive-impression material interface and partly within the adhesive but never at the adhesive-tray material interface.

SIGNIFICANCE

The 3D printed tray materials can achieve satisfactory chemical compatibility with the adhesives of VSXE, VPS, and PE. Surface topographies generated by the 3D printing technologies may affect bonding. Generally, 3D printed tray materials can provide clinically adequate bond strength with the elastomeric impression/adhesive systems. PLA is recommended for bonding with VPS when severe impression removal resistance is detected.

摘要

目的

本研究旨在通过剥离试验评估三种 3D 打印定制托盘材料与三种弹性印模/黏附系统之间的黏附力。

方法

使用 Dental LT、FREEPRINT 托盘和聚乳酸（PLA）托盘材料，通过三种不同的技术 3D 打印测试块。参考测试块由 Zeta Tray LC 常规制作，为光固化树脂。通过扫描电子显微镜（SEM）分析和粗糙度测量来研究四种托盘材料的表面形貌。测量了四种托盘材料（n=12/组）与三种印模/黏附系统（乙烯基硅氧烷醚[VSXE]、乙烯基聚硅氧烷[VPS]和聚醚[PE]）之间的剥离黏附强度。通过显微镜识别剥离失效模式和断裂部位。

结果

四种托盘材料具有不同的表面形貌。VSXE 和 PE 与两种托盘材料之间的剥离黏附强度没有显著差异，但与 Dental LT 和 FREEPRINT 托盘相比，PLA 和参考托盘与 VPS 的剥离黏附强度更高（p<0.05）。所有组的黏附失效断裂部位部分位于黏附-印模材料界面，部分位于黏附剂内，但从未在黏附剂-托盘材料界面。