Application study of three-dimensional printing individualized tray in impression taken of presurgical nasoalveolar molding for newborn with cleft lip and palate
10.3760/cma.j.cn114453-20210305-00102
- VernacularTitle:三维打印个性化托盘在唇腭裂新生儿术前鼻牙槽塑形治疗取模中的应用研究
- Author:
Zhenjin ZHAO
1
;
Shicheng WANG
;
Hao CHEN
;
Qiang LIU
Author Information
1. 中国医科大学口腔医学院附属口腔医院正畸教研室，辽宁省口腔疾病重点实验室，沈阳 110002
- Keywords:
Cleft lip and palate;
Newborn;
Presurgical nasoalveolar molding;
Tray;
Impression technique;
Three-dimensional printing
- From:
Chinese Journal of Plastic Surgery
2022;38(4):425-431
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the application of three-dimensional(3D) printed individualized tray in impression taken of presurgical nasoalveolar molding(PNAM) for newborn with cleft and palate.Methods:The newborns with unilateral/bilateral cleft lip and palate treated with PNAM during 2015 to 2020 in School and Hospital of Stomatology, China Medical University, were chosen. Their clinical materials were retrospectively analyzed. Maxillary impressions taken by 3D printed individualized trays were compared with those taken by modified traditional tray. The indexes were evaluated including the numbers of defects (bubbles with diameter>1 mm and exposure of tray) in each impression; the impression quality grade (perfect 1, good 2, qualified 3 and unqualified 4), and the integrity and legibility of impressions [evaluated by 3 orthodontists using visual analog scale(VAS)]. The date was analyzed by SPSS 23.0. Rank-sum test was used for comparison between groups.Results:A total of 22 patients were included. There were 7 patients (3 males, 4 females, 3-28 days old) in modified traditional tray group and 15 patients (10 males, 5 females, 4-26 days old) in 3D printed individualized trays group. All patients finished the PNAM treatment before repairment of cleft lip. The average treatment duration were 136 days with 131 days in modified traditional tray group and 137 days in 3D printed individualized trays group. (1) The impressions made by conventional method had more defects [6(5, 7)] than those made by 3D printed individualized trays[2(1, 2)]( P<0.05). (2)The impression taken by modified traditional tray was mainly qualified[3(2, 3)scores] and that taken by 3D printed individualized tray exhibited higher grade [good, 2(2, 2) scores]( P<0.01). (3) Compared with modified traditional tray group, the scores of VAS on integrity of impression taken by 3D printed individualized tray were significantly high( P<0.05). Itemized evaluation showed that the integrity scores on all positions except vestibular sulcus had significant difference between groups( P<0.05 or P<0.01). The scores of VAS on legibility of impression taken by 3D printed individualized tray were significantly higher than those taken by modified traditional tray( P<0.05). As for itemized evaluation, legibility scores on all positions except upper frenum had significant difference between groups( P<0.05 or P<0.01). Conclusions:The impression taken by 3D printing individualized tray has higher quality, integrity and legibility.
