scholarly journals Reliability of Different Anterior Cranial Base Reference Areas for Voxel-Based Superimposition

2021 ◽  
Vol 10 (22) ◽  
pp. 5429
Author(s):  
Mohammed Ghamri ◽  
Georgios Kanavakis ◽  
Nikolaos Gkantidis
Keyword(s):  
Cranial Base ◽  
Base Area ◽  
Anterior Cranial Base ◽  
Base Reference ◽  
3D Software ◽  
Reference Areas

The study aimed to evaluate the reliability and reproducibility and compare the outcomes of two 3D voxel-based superimposition techniques for craniofacial CBCT images, using anterior cranial base areas of different extent as references. Fifteen preexisting pairs of serial CBCTs (initial age: 11.7 ± 0.6 years; interval: 1.7 ± 0.4 years) were superimposed on total anterior cranial base (TACB) or middle anterior cranial base (MACB) structures through the Dolphin 3D software. The overlap of the reference structures was assessed visually to indicate reliability. All superimpositions were repeated by the same investigator. Outcomes were compared to assess the agreement between the two methods. Reliability was perfect for the TACB and moderate for the MACB method (p = 0.044). Both areas showed good overall reproducibility, though in individual cases there were notable differences for MACB superimpositions, ranging from −1.84 to 1.64 mm (TACB range: −0.48 to 0.31 mm). The overall agreement in the detected T0/T1 changes was also good, though it was significantly reduced for individual measurements (median < 0.01 mm, IQR: 0.46 mm, range: −2.81 to 0.73 mm). In conclusion, the voxel-based superimposition on TACB was more reliable and showed higher reproducibility than the superimposition on MACB. Thus, the extended anterior cranial base area is recommended for the assessment of craniofacial changes.

scholarly journals Valid 3D Surface Superimposition References to Assess Facial Changes During Growth

2021 ◽  
Author(s):  
Simeon Häner ◽  
Georgios Kanavakis ◽  
François Matthey ◽  
Nikolaos Gkantidis
Keyword(s):  
Standard Technique ◽  
Cranial Base ◽  
Middle Part ◽  
Reference Area ◽  
Anterior Cranial Base ◽  
Rectangular Area ◽  
Facial Changes ◽  
Changes Over Time ◽  
Facial Images ◽  
Reference Areas

Abstract Currently, the primary techniques applied for the assessment of facial changes over time utilize 2D images. However, this approach has important limitations related to the dimensional reduction and the accuracy of the used data. 3D facial photography has been recently introduced as a risk-free alternative that overcomes these limitations. However, the proper reference areas that should be used to superimpose serial 3D facial images of growing individuals are not yet known. Here, we tested various 3D facial photo superimposition reference areas and compared their outcomes to those of a standard anterior cranial base superimposition technique. We found that a small rectangular area on the forehead plus an area including the middle part of the nose and the lower wall of the orbital foramen provided comparable results to the standard technique and showed adequate reproducibility. Other reference areas that have been used so far in the literature were less reliable. This is the first study to identify a valid superimposition reference area for serial 3D facial images of growing individuals. The utilization of the suggested method greatly expands the possibilities of this highly informative, risk free, and easily obtained 3D tool for the assessment of facial changes in growing individuals.

scholarly journals Valid 3D surface superimposition references to assess facial changes during growth

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Simeon T. Häner ◽  
Georgios Kanavakis ◽  
François Matthey ◽  
Nikolaos Gkantidis
Keyword(s):  
Standard Technique ◽  
Cranial Base ◽  
Middle Part ◽  
Reference Area ◽  
Anterior Cranial Base ◽  
Rectangular Area ◽  
Facial Changes ◽  
Changes Over Time ◽  
Facial Images ◽  
Reference Areas

AbstractCurrently, the primary techniques applied for the assessment of facial changes over time utilize 2D images. However, this approach has important limitations related to the dimensional reduction and the accuracy of the used data. 3D facial photography has been recently introduced as a risk-free alternative that overcomes these limitations. However, the proper reference areas that should be used to superimpose serial 3D facial images of growing individuals are not yet known. Here, we tested various 3D facial photo superimposition reference areas and compared their outcomes to those of a standard anterior cranial base superimposition technique. We found that a small rectangular area on the forehead plus an area including the middle part of the nose and the lower wall of the orbital foramen provided comparable results to the standard technique and showed adequate reproducibility. Other reference areas that have been used so far in the literature were less reliable. Within the limitations of the study, a valid superimposition reference area for serial 3D facial images of growing individuals is suggested. The method has potential to greatly expand the possibilities of this highly informative, risk free, and easily obtained 3D tool for the assessment of facial changes in growing individuals.

Wide reconstruction of the anterior cranial base with bipedicled galeopericranial flap

Head & Neck ◽  
1996 ◽  
Vol 18 (3) ◽  
pp. 292-294 ◽  
Author(s):  
Hiroto Terashi ◽  
Takashi Yoshida ◽  
Seiji Katayama ◽  
Tatsuya Fujiyoshi ◽  
Osamu Shimizu ◽  
...  
Keyword(s):  
Cranial Base ◽  
Anterior Cranial Base

Zones of Exposure in Surgical Approaches to the Anterior Cranial Base and Paranasal Sinuses

2003 ◽  
Vol 25 (25) ◽  
pp. 1-11
Author(s):  
William T. Couldwell ◽  
James K. Liu ◽  
Richard R. Orlandi ◽  
Martin H. Weiss
Keyword(s):  
Paranasal Sinuses ◽  
Cranial Base ◽  
Surgical Approaches ◽  
Anterior Cranial Base

scholarly journals An Assessment of Skeletal Craniofacial Asymmetry in South Indian Population

2012 ◽  
Vol 13 (1) ◽  
pp. 80-84 ◽  
Author(s):  
G Anil Kumar ◽  
Saibel Farishta ◽  
G Baiju ◽  
VK Taneja ◽  
RC Minocha ◽  
...  
Keyword(s):  
College Students ◽  
South India ◽  
Indian Population ◽  
Cranial Base ◽  
The Other ◽  
South Indian Population ◽  
X Rays ◽  
Base Area ◽  
South Indian ◽  
The Face

ABSTRACT The present study was undertaken to assess the skeletal craniofacial asymmetry in South Indian population by a posteroanterior cephalometric radiographic method. The skeletal craniofacial structures on one side of the face were compared with that of the other, by drawing various triangles representing different craniofacial regions. The sample consisted of 60 subjects (30 males and 30 females) aged between 18 to 25 years, who were mainly dental college students from South India. Overall 52 X-rays were obtained, with four errors each in the male and the female groups. The results revealed that the total facial structures in the South Indian population were larger on the left side (statistically insignificant). The cranial base area exhibited a greater degree of asymmetry than any other component area of the face, which might be due to the inaccuracy at the condylar point. How to cite this article Taneja VK, Kumar GA, Farishta S, Minocha RC, Baiju G, Gopal D. An Assessment of Skeletal Craniofacial Asymmetry in South Indian Population. J Contemp Dent Pract 2012;13(1):80-84.

Sign in / Sign up

Export Citation Format

Share Document