Journal of Peking University(Health Sciences) >
Comparison of two registration methods for constructing virtual craniodentofacial patients based on cone beam computed tomography images
Received date: 2021-10-11
Online published: 2025-04-12
Supported by
the National Natural Science Foundation of China(81801015);the Program for New Clinical Techniques and Therapies of Peking University School and Hospital of Stomatology(PKUSSNCT-20B07);the National Program for Multidisciplinary Cooperative Treatment on Major Diseases(PKUSSNMP-201901);the National Clinical Key Discipline Construction Project(PKUSSNKP-202117)
Copyright
Objective: To compare the registration accuracy of cone beam computed tomography (CBCT) images while registering to virtual craniodentofacial patients based on soft tissue and the dentition registration method. Methods: Virtual dentofacial patients out of 13 selected participants who needed CBCT scanning were established by impression with a registered-block impression (RBI) based on digital dental images, three-dimensional (3D) facial images and maxillofacial CBCT images. CBCT images were processed in the Mimics software program, establishing the craniofacial virtual patients based on CBCT images (CCTs). Registration between virtual patients from RBI and CCT, using the soft tissue in lower half face (STE) and dentition (DTN) as the reference area, respectively, forming two kinds of virtual craniofacial patients based on digital dental images, 3D facial images and skeletal images of CBCT (hiding the soft tissue and dental casts from CBCT). Three-dimensional deviation analysis was performed in the upper half face and lower half face of facial images from CBCT between two kinds of virtual craniodentofacial patients and compared with 3D facial images from RBI and recorded as root mean square error (RMSE). Paired-t test was used to compare the deviations of RMSEs between the upper and lower half of the face and the upper half of the face of facial images from CCT, respectively, between the two kinds of virtual craniodentofacial patients based on STE and DTN methods. Results: Paired-t tests showed that there was no statistically significant difference between the upper and lower half faces of facial images from CCT between STE and DTN (P>0.05), but the deviation of RMSEs of the upper half face of facial images from CCT in STE was smaller than those in DTN [(1.696±0.420) mm vs. (1.752±0.424) mm, P < 0.01]. Conclusion: The registration accuracy of CBCT registered in virtual craniodentofacial patients using soft tissue as the reference area was higher.
Jiahui YE , Shimin WANG , Zixuan WANG , Yunsong LIU , Yuchun SUN , Hongqiang YE , Yongsheng ZHOU . Comparison of two registration methods for constructing virtual craniodentofacial patients based on cone beam computed tomography images[J]. Journal of Peking University(Health Sciences), 2025 , 57(2) : 354 -359 . DOI: 10.19723/j.issn.1671-167X.2025.02.021
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