WITHDRAWN: Application of medical care four-hand operation mode in digital indirect bonding of palisade guide

Abstract

This study summarizes the effect of high quality medical carefour-hand operation mode in indirect bonding technology. The technology was applied to the palisade guide for excess binder production and the transfer accuracy of the pallet. Materials and methods: Upper dental arch data of an elderly patient with periodontitis was obtained using an intraoral scanner. Twenty upper dental arch models were 3D printed. 3Shape, PlastyCAD software, and 3D printing technology were used to obtain ten 3D printed palisade guides (3D PPG Method I) and semi-wrapped guides (SWG Method II). The bracket was transferred from the guide plate to the 3D printed upper dental arch model. After the bracket transfer, the excess binder, linearity, and Angle errors were measured through a four-hand operation, including preoperative preparation, intraoperative coordination, and postoperative care. The differences between the two methods were also analyzed. Results: The comparison of the two methods revealed that the SWG of 9.673(8.185-11.237) was greater than 3D PPG (P<0.001) in terms of excess binder – The difference was statistically significant. Further, SWG’s vertical direction error was 0.191 (0.136-0.210) in terms of linear error, which was greater than that of 3D PPG (P<0.001)- The difference was statistically significant. In terms of Angle deviation, the SWG’s Tip and Torque were 0.788 (0.717-0.825) (P<0.05) and 0.908 (0.855-0.983) (P<0.001), respectively. Both of these values were greater than that of 3D PPG and were statistically significant. Thus, all these results favoured 3D PPG. The study data of anterior teeth, cusp teeth, and premolars showed that the premolars were excess adhesive (P<0.05), and both methods had statistical significance. The 3D PPG were premolars Vertical(P<0.05), while the SWG premolars were Transversal and Torque(P<0.05), and the anterior Rotation(P<0.05)- All the values were statistically significant. Conclusions: Skilled medical care four-hand operation was necessary for the palisade guide to achieve less adhesive residue and higher bonding accuracy. Among them, the residual amount of binder, linear, and angular error of the palisade guide was less than that of the semi-wrapped guide, which was conducive to clinical popularization.