Lammer Catharina Anna, Dönmez Mustafa Borga, Çakmak Gülce, Kahveci Çiğdem, Yilmaz Burak
Dissertation Student, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, Universit of Bern, Bern, Switzerland.
Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Biruni University, Istanbul, Turkey; and PhD Student, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
J Dent. 2025 Oct;161:105908. doi: 10.1016/j.jdent.2025.105908. Epub 2025 Jun 12.
To assess how resin type (water-washable [WW] and non-water-washable [NWW] and cleaning solution (water, methyl ether solvent [MES], or isopropyl alcohol [IPA]) affect the dimensional stability of additively manufactured casts over a three-month period.
Maxillary casts were fabricated using two WW (WW1 and WW2) and one NWW (NWW) cast resins (N = 24). These casts were divided into groups depending on the cleaning solution (water, MES, and IPA) used (n = 8), and digitized one day (T0), one week (T1), two weeks (T2), three weeks (T3), and three months (T4) after fabrication. Deviations were analyzed across regions (anterior, posterior, entire arch, soft tissue, and overall). A generalized linear model was used for statistical analysis (α = 0.05).
NWW casts had the lowest anterior, posterior, and entire arch deviations (P < 0.001). WW1 casts mostly showed higher deviations than WW2 casts in these regions when cleaned with water or MES (P ≤ 0.028). WW1 casts had the highest soft tissue deviations within each cleaning solution (P < 0.001). With water, WW1 casts had higher deviations than with MES, while WW2 casts showed lower deviations than NWW casts (P ≤ 0.032). NWW resin or MES led to the lowest entire cast deviations, with the lowest values observed at T0 (P ≤ 0.007).
NWW casts mostly had the highest stability, while WW2 casts mostly had higher stability than WW1 casts. MES led to higher stability for WW resins and resulted in similar or higher stability for NWW resin compared to IPA.
Tested water-washable resins, particularly when cleaned with methyl ether solvent, may be sustainable alternatives to non-water-washable resin for dentate casts, as their deviations were acceptable for diagnostic and orthodontic purposes for three months. Methyl ether solvent can improve eco-friendliness of the fabrication of casts in tested non-water-washable resin.
评估树脂类型（水洗型[WW]和非水洗型[NWW]）以及清洁溶液（水、甲基醚溶剂[MES]或异丙醇[IPA]）在三个月期间如何影响增材制造铸型的尺寸稳定性。
使用两种水洗型（WW1和WW2）和一种非水洗型（NWW）铸型树脂制作上颌铸型（N = 24）。这些铸型根据所使用的清洁溶液（水、MES和IPA）分为几组（n = 8），并在制作后一天（T0）、一周（T1）、两周（T2）、三周（T3）和三个月（T4）进行数字化处理。对各区域（前部、后部、整个牙弓、软组织和整体）的偏差进行分析。采用广义线性模型进行统计分析（α = 0.05）。
NWW铸型的前部、后部和整个牙弓偏差最小（P < 0.001）。当用水或MES清洁时，WW1铸型在这些区域的偏差大多高于WW2铸型（P≤0.028）。在每种清洁溶液中，WW1铸型的软组织偏差最大（P < 0.001）。用水清洁时，WW1铸型的偏差高于用MES清洁时，而WW2铸型的偏差低于NWW铸型（P≤0.032）。NWW树脂或MES导致整个铸型的偏差最小，在T0时观察到最低值（P≤0.007）。
NWW铸型大多具有最高的稳定性，而WW2铸型大多比WW1铸型具有更高的稳定性。MES使WW树脂具有更高的稳定性，并且与IPA相比，使NWW树脂具有相似或更高的稳定性。
经测试的水洗型树脂，特别是在用甲基醚溶剂清洁时，对于有牙铸型而言，可能是可持续替代非水洗型树脂的材料，因为其偏差在三个月内对于诊断和正畸目的是可接受的。甲基醚溶剂可以提高测试的非水洗型树脂铸型制作的生态友好性。
