Patchanee Siripatra, Amornvit Pokpong, Mortin Maneethip, Chaiprakit Narissaporn
Division of Orthodontics, Faculty of Dentistry, Thammasat University, Pathum Thani, 12120, Thailand.
PPFACEDESIGN, The S Clinic, Bangkok, 10120, Thailand.
Heliyon. 2024 Dec 12;11(1):e41177. doi: 10.1016/j.heliyon.2024.e41177. eCollection 2025 Jan 15.
To evaluate the accuracy (trueness and precision) of liquid crystal display (LCD)-printed orthognathic surgical splints under two different post-processing conditions-rinsing solvent and post-polymerization time.
An LCD 3D printer was used to create 48 surgical splints using the same reference standard tessellation language (STL) files. They were randomly assigned to two experimental studies. In the rinsing solvent study, 24 surgical splints were divided into three groups (n = 8) based on their rinsing solvents: isopropyl alcohol (IPA), ethanol, and water. In the post-polymerization time study, 24 surgical splints were divided into three groups (n = 8) based on the post-polymerization time: (3, 6, and 10 min). The surgical splints were covered with an opaque scanning spray, scanned, and converted into STL files. The images were trimmed and superimposed onto the reference STL file to evaluate trueness and precision, and the deviation was calculated using the root mean square (RMS) formula. Color map data were also obtained. The RMS was statistically analyzed using one-way analysis of variance and Tukey's test (α < 0.05).
The lowest RMS values of trueness and precision were observed in the IPA group and the 6-min post-polymerization time groups (p < 0.05). The IPA-rinse and 6-min polymerization groups (p < 0.05) demonstrated the highest accuracy for LCD-printed orthognathic surgical splint fabrication.
The dimensional accuracy of LCD-printed surgical splints is affected by the post-processing conditions, including the rinsing solvent and polymerization time. The RMS and color map data associated with the IPA-rinse and 6-min polymerization corresponded to the highest accuracy.
评估在两种不同的后处理条件（冲洗溶剂和后聚合时间）下，液晶显示器（LCD）打印的正颌外科夹板的准确性（真实性和精密度）。
使用一台LCD 3D打印机，利用相同的参考标准镶嵌语言（STL）文件制作48个外科夹板。将它们随机分配到两项实验研究中。在冲洗溶剂研究中，24个外科夹板根据其冲洗溶剂分为三组（n = 8）：异丙醇（IPA）、乙醇和水。在聚合后时间研究中，24个外科夹板根据聚合后时间分为三组（n = 8）：（3、6和10分钟）。外科夹板覆盖不透明扫描喷雾，进行扫描，并转换为STL文件。对图像进行修剪并叠加到参考STL文件上，以评估真实性和精密度，并使用均方根（RMS）公式计算偏差。还获得了彩色地图数据。使用单因素方差分析和Tukey检验（α < 0.05）对RMS进行统计分析。
在IPA组和聚合后6分钟组中观察到真实性和精密度的最低RMS值（p < 0.05）。IPA冲洗和6分钟聚合组（p < 0.05）在LCD打印正颌外科夹板制作方面显示出最高的准确性。
LCD打印外科夹板的尺寸精度受后处理条件影响，包括冲洗溶剂和聚合时间。与IPA冲洗和6分钟聚合相关的RMS和彩色地图数据对应最高的准确性。
