Int J Stomatol ›› 2022, Vol. 49 ›› Issue (3): 296-304.doi: 10.7518/gjkq.2022061

• Original Articles • Previous Articles     Next Articles

Effect of 3D printing orthognathic surgical splints with different dental model offsets on occlusal precision

Ma Jianbin(),Xue Chaoran,Wang Peiqi,Li Bin,Bai Ding.()   

  1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2021-11-16 Revised:2022-03-05 Online:2022-05-01 Published:2022-05-09
  • Contact: Ding. Bai;
  • Supported by:
    Miaozi Project in Science and Technology Innovation Program of Sichuan Province(20-YCG045)

Abstract: Objective

This study aimed to assess the precision of 3D-printed orthognathic surgical splints (OSS) with different dental model offsets and explore the optimal offsets of OSS.


Ten resin models that met the standard of normal occlusion were selected, and the digital models were obtained by using an optical scanner. The research models were made by using a 3D photosensitive resin printer, and then the original digital models were obtained. Digital OSS with different offsets (0.00, 0.05, 0.10, 0.15, 0.20, and 0.25 mm groups) was designed for each model, and physical OSS was fabricated by 3D printing. The upper and lower dentition of each resin model was reoccluded in OSS with different offsets, and the deviation of the actual occlusion from the original occlusion in six dimensions of horizontal, sagittal, vertical, pitch, roll, and yaw was evaluated.


1) The actual occlusion obtained by OSS without offsets (0.00 mm group) had deviation in six dimensions, and the deviation in vertical (1.044±0.181 mm) and pitch (1.738°±0.772°) dimensions was the largest. 2) In sagittal, vertical, pitch, and roll dimensions, the mean value of actual occlusal deviation gradually decreases with the increase of offsets. In the vertical and pitch dimensions, the actual occlusal deviation of the 0.15 mm group was significantly less than that of the 0.00, 0.05, and 0.10 mm groups (P<0.01), but no significant difference was found between the 0.20 mm and 0.25 mm groups (P>0.05). In addition, no significant difference in sagittal and roll dimensions was found among the groups (P>0.05). 3) In the horizontal and yaw dimensions, within the range of 0.00-0.20 mm, the mean value of actual occlusal deviation gradually decreased with the increase of offsets (P>0.05). However, the actual occlusal deviation of the 0.25 mm group was larger than that of the 0.20 mm group (P>0.05).


3D printed OSS with offsets can reduce the deviation of the actual occlusion. Among the parameters, 0.15 mm is the suitable option for generating OSS.

Key words: computer-aided technology, 3D printing, orthognathic surgical splints, offsets

CLC Number: 

  • R 783


Fig 1

Research models with different offsets"

Fig 2

Fabrication of OSS with offsets"

Fig 3

Physical OSS and occlusal model"

Fig 4

Global coordinate system of reference model"

Tab 1

Definition of measurement dimension"


Tab 2

Repeatability results of measurement and opera-tion by the same researcher"


Tab 3

The overall view of translation deviation of OSS with different offsets in X, Y, Z three-dimensional direction mm,n=10"


Tab 4

The overall view of rotation deviation of OSS with different offsets in P, Q, R three-dimensional direction °,n=10"


Tab 5

Deviation values of OSS with different offsets in each dimension"


Fig 5

Taking the original occlusion as a reference, the influence of occlusion deviation caused by OSS on the position of the mandibular in vertical dimension"

Fig 6

Taking the original occlusion as a reference, the influence of occlusion deviation caused by OSS on the position of the mandibular in pitch dimension"

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