Mechanical and optical properties of additively manufactured denture base resin in different colors modified with antimicrobial substances: An in vitro study

IF 4.3 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI:10.1016/j.prosdent.2024.12.018
Rafat Sasany DDS, PhD , Faris Z. Jamjoom BDS, MS, DMSc, FRCD(C) , Burak Yilmaz DDS, PhD
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Abstract

Statement of problem

Acrylic denture base resins are subject to colonization by oral and nonoral bacteria, contributing to the onset of denture stomatitis. However, how the addition of antimicrobial substances affects the mechanical and optical properties of additively manufactured denture base resin remains unclear.

Purpose

The purpose of this in vitro study was to investigate the surface roughness, color stainability, and flexural strength of antimicrobial-modified, additively manufactured polymethyl methacrylate (PMMA) denture base resin in tooth and gingiva colors.

Material and methods

Three antibacterial agents, e-poly-L-lysine+ methacryloyloxyethyl phosphorylcholine (e-MP), silver nanoparticles (AG-P), quaternized ammonium monomer (QA-P) synthesized via the reaction of octyl bromide and DMAEMA, were separately incorporated into tooth- or gingiva-colored 3-dimensionally (3D) printable PMMA specimens, simulating an implant-supported overdenture base or the artificial teeth (n=80). Unaltered specimens served as controls. Autopolymerizing acrylic resin was used to attach titanium matrix housings to gingiva-colored specimens. All specimens underwent coffee thermal cycling (CTC) comprising 10 000 cycles between 5 °C and 55 °C, and their color coordinates were measured. Surface roughness, color change (ΔE00), and flexural strength were calculated before and after CTC. The results were analyzed and compared by using ANOVA and the Tukey post hoc test (α=.05).

Results

All antibacterial agent-incorporated specimens showed lower ΔE00 values than the control (P=.001), with eM-P exhibiting the least color change (P=.001). The control group had the highest post-CTC roughness (Ra) values (P<.001), while all test groups demonstrated higher flexural strength than the control (P=.001). CTC had no significant effect on flexural strength (P>.115).

Conclusions

The addition of antimicrobial agents to 3D printable implant overdenture base resin in tooth and gingiva color affected the materials’ surface properties, color stainability, and flexural strength. Smoother surface, lower color stainability, and higher flexural strength were observed with the addition of eM-P.
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用抗菌物质改性不同颜色增材制造义齿基托树脂的力学和光学性能的体外研究。
问题陈述:丙烯酸义齿基托树脂容易被口腔和非口腔细菌定植,导致义齿口炎的发生。然而,抗菌物质的加入如何影响增材制造义齿基托树脂的力学和光学性能尚不清楚。目的:研究抗菌改性聚甲基丙烯酸甲酯(PMMA)义齿基托树脂在牙齿和牙龈颜色方面的表面粗糙度、颜色可染性和抗弯强度。材料与方法:将3种抗菌剂e-聚l -赖氨酸+甲基丙烯酰氧乙基酰磷胆碱(e-MP)、银纳米颗粒(AG-P)、季铵化单体(QA-P)分别加入到牙齿或牙龈颜色的三维可打印PMMA样品中,模拟种植覆盖义齿基托或假牙(n=80)。未改变的标本作为对照。使用自聚合丙烯酸树脂将钛基外壳附着在牙龈色标本上。所有标本在5°C至55°C之间进行咖啡热循环(CTC),共10000次循环,并测量其颜色坐标。计算CTC前后的表面粗糙度、颜色变化(ΔE00)和抗弯强度。采用方差分析和Tukey事后检验对结果进行分析和比较(α= 0.05)。结果:各抗菌剂掺入标本ΔE00值均低于对照组(P=.001),其中eM-P颜色变化最小(P=.001)。对照组的ctc后粗糙度(Ra)值最高(P.115)。结论:3D打印种植覆盖义齿基托树脂中添加抗菌药物对牙体和牙龈颜色的影响,影响材料的表面性能、颜色可染性和抗弯强度。添加eM-P后,表面更光滑,颜色污渍更低,抗弯强度更高。
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来源期刊
Journal of Prosthetic Dentistry
Journal of Prosthetic Dentistry 医学-牙科与口腔外科
CiteScore
7.00
自引率
13.00%
发文量
599
审稿时长
69 days
期刊介绍: The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.
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