Effects of pressure steam sterilization times on the accuracy of the digital intraoral scanning data
10.3760/cma.j.cn112144-20201207-00602
- VernacularTitle:高压蒸汽灭菌次数对数字化口内扫描系统扫描精度的影响
- Author:
Qi XI
1
;
Xi CHEN
;
Xin ZHAN
;
Jing ZHU
;
Guofeng WU
Author Information
1. 南京大学医学院附属口腔医院·南京市口腔医院修复科 210008
- Keywords:
Dental impression technique;
Sterilization;
Disinfection;
Digital intraoral scanner;
Trueness;
Precision
- From:
Chinese Journal of Stomatology
2021;56(5):474-478
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To provide a scientific basis for the standardized operation of clinical disinfection by comparing and analyzing the influence of disinfection times on the accuracy of digital intraoral scanning.Methods:The author prepared 10 brand-new intraoral scanning heads (Trios, 3Shape, Denmark), scan the same plaster standard dentition model after 1, 20, 40, and 60 times of pressure steam sterilization, and obtained the data of four groups of experimental groups A, B, C, D, and scan the model 5 times repeatedly after each disinfection cycle of each scanning head. A model scanner (D2000, 3Shape, Denmark) was used to scan the standard dentition model, and the scan results were used as the control group data. Vernier calipers and measurement software were used to measure the arch length (the distance between the mesial cheek tips of the first molars on both sides of the maxillary) and the front and back length (the distance from the tongue protrusion of the right incisor to the buccal tip of the first molar on the right of the upper jaw) of the plaster model and the data of the 4 experimental groups. The line distance results of the 4 groups of experimental groups were compared for statistical analysis, and the trueness and precision values of the 4 groups of experimental groups were compared for statistical analysis.Results:The length of the arch across the 4 experimental groups increased with the increase in the number of disinfection ( P<0.05), and there were statistical differences compared with the measurement results of the plaster model ( P<0.05); the differences in the length of the dental arch were not statistically significant ( P>0.05). The treness of the 4 experimental groups is statistically significant ( P<0.05), and the trueness was from high to low in order of group A [(114.85±3.75) μm], group B [(124.65±3.85) μm], group C [(131.45±3.04) μm] and group D [(144.64±3.34) μm]; the precision of the 4 experimental groups was not statistically significant ( P>0.05). Conclusions:The number of times of pressure steam sterilization can affect the accuracy of the scanning results of the digital intraoral scanner, and with the increase of the number of sterilizations, the error of the scanning results also tends to increase. The number of sterilizations has no effect on the repeatability of the digital scanning results. The increase in the number of times of pressure steam sterilization affects the accross of the arch but has no effect on the length of the dental arch, and the range of change of the length of the arch is within the clinically acceptable range. After 60 times of pressure steam sterilization, the accuracy of digital scan data can still meet clinical needs.
