Craniofacial measurements based on 3D-CT volume rendering: implications for clinical applications

Cavalcanti, Marcelo Gusmão Paraíso; Rocha, Sicknan Soares da; Vannier, Michael W.

doi:10.1259/dmfr/13603271

Cited by 179 publications

(138 citation statements)

References 21 publications

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“…Our findings indicated that the mean differences between the 3D computer-assisted cephalometric and manual cephalometric measurements were less than 2 mm for all 29 measurements, and they showed the accuracy of 3D computer-assisted cephalometry, which is in line with the results of Cavalcanti et al, 10 Lopes et al, 30 and Bassam et al 31 The authors suggested performing cephalometric analysis on 3D-rendered models, which seemed to be the most appropriate approach in terms of accuracy and convenience. The comparison of manual and conventional cephalometric measurements indicated significant differences.…”

Section: Discussionsupporting

confidence: 91%

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Measurement accuracy of a computer-assisted three-dimensional analysis and a conventional two-dimensional method

Ölmez¹,

Görgülü²,

Akın³

et al. 2011

The Angle Orthodontist

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Objective: To determine the differences between manual and cephalometric measurements on different sections of the human skull, which were obtained using computer-assisted threedimensional (3D) analysis and conventional two-dimensional (2D) techniques. Materials and Methods: Measurements were carried out on 13 dry human skulls, then 2D cephalograms and 3D computed tomographic (CT) images were obtained. Anatomic landmarks were determined and marked with clay before CT images were taken, and the same landmarks were marked with the help of metallic balls and pins for lateral and frontal cephalograms. Manual, lateral/frontal cephalometric, and computer-assisted 3D cephalometric measurements were compared statistically. One-way analysis of variance and Tukey Honestly Significant Difference tests were used to compare the results among the groups. Results: All measurements were statistically insignificant between the computer-assisted 3D and manual measurements. On the other hand, the differences between the conventional 2D and the manual measurements were statistically significant. The greatest amount of magnification was found at the Nasion-Menton distance (14.6%), which was located at the farthest distance from the central x-ray beam in the lateral cephalogram (P , .01). For the same reason, the greatest enlargement (16.2%) was observed in the distance between the zygomaticomaxillary sutures on the conventional frontal cephalogram (P , .01). Conclusions: The computer-aided 3D cephalometric measurements were found to be more accurate than the conventional cephalometric measurements. The results revealed that 3D cephalometric measurements were consistent with the manual measurements. In addition, the magnification and distortion might limit the results of conventional cephalometric measurements. (Angle Orthod. 2011;81:375-382.)

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Section: Discussionsupporting

confidence: 91%

“…7,8 The accuracy of 3D-rendered images had been previously evaluated, 9,10 and the findings showed that direct 3D measurements were highly accurate, with no significant discrepancies from manual measurements. 3D imaging techniques comprise a noninvasive method.…”

Section: Introductionmentioning

confidence: 99%

Measurement accuracy of a computer-assisted three-dimensional analysis and a conventional two-dimensional method

Ölmez¹,

Görgülü²,

Akın³

et al. 2011

The Angle Orthodontist

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show abstract

“…However, patients usually evaluate their own soft tissue esthetics on the basis of how they look in a frontal view. Therefore, three-dimensional (3D) imaging methods, such as 3D computed tomography [3][4][5][6] and 3D facial scan images (3D-FSIs), [7][8][9][10][11][12] are used to analyze and evaluate the soft tissues of the entire face.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional evaluation of soft tissue change gradients after mandibular setback surgery in skeletal Class III malocclusion

Lim¹,

Chu²,

Lee³

et al. 2010

The Angle Orthodontist

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Objective: To evaluate whether mandibular setback surgery (MSS) for Class III patients would produce gradients of three-dimensional (3D) soft tissue changes in the vertical and transverse aspects. Materials and Methods: The samples consisted of 26 Class III patients treated with MSS using bilateral sagittal split ramus osteotomy. Lateral cephalograms and 3D facial scan images were taken before and 6 months after MSS, and changes in landmarks and variables were measured using a Rapidform 2006. Paired and independent t-tests were performed for statistical analysis. Results: Landmarks in the upper lip and mouth corner (cheilion, Ch) moved backward and downward (respectively, cupid bow point, 1.0 mm and 0.3 mm, P , .001 and P , .01; alar curvature-Ch midpoint, 0.6 mm and 0.3 mm, both P , .001; Ch, 3.4 mm and 0.8 mm, both P , .001). However, landmarks in stomion (Stm), lower lip, and chin moved backward (Stm, 1.6 mm; labrale inferius [Li], 6.9 mm; LLBP, 6.9 mm; B9, 6.7 mm; Pog9, 6.7 mm; Me9, 6.6 mm; P , .001, respectively). Width and height of upper and lower lip were not altered significantly except for a decrease of lower vermilion height (Stm-Li, 1.7 mm, P , .001). Chin height (B9-Me9) was decreased because of backward and upward movement of Me9 (3.1 mm, P , .001). Although upper lip projection angle and Stm-transverse projection angle became acute (Ch Rt -Ls-Ch Lt , 5.7u; Ch Rt -Stm-Ch Lt , 6.4u, both P , .001) because of the greater backward movement of Ch than Stm, lower lip projection angle and Stm-vertical projection angle became obtuse (Ch Rt -Li-Ch Lt , 10.8u; LsStm-Li, 23.5u, both P , .001) because of the larger backward movement of Li than labrale superius (Ls). Conclusions: Three-dimensional soft tissue changes in Class III patients after MSS exhibited increased gradients from upper lip and lower lip to chin as well as from Stm to Ch. (Angle Orthod. 2010;80:896-903.)

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“…TC Cone-Beam 3D -Os parâmetros utilizados para a análise das VAS foram obtidos com a análise volumétrica das vias aéreas [29], com a utilização da tomografia computadorizada de feixe cônico (TCCB). As imagens foram adquiridas com um tomógrafo de feixe cônico I-CAT (I-CAT ™ Imaging Sciences International, Hatfield, PA) que se utiliza de um tubo de raios-X de alta frequência de anodo fixo (120 kVp, 3 ~ 8 mA) e um detector de tela plana de silício amorfo (a-Si) de 20 x 25 cm.…”

Section: Materiais E Métodosunclassified

Comparação Do Modo De Ação De Dois Aparelhos Orais De Avanço Mandibular Para Tratamento De Apneia Obstrutiva Do Sono – Relato De Caso

Df¹,

Srb²,

Lmdb³

et al. 2018

Anais Do v Congresso Brasileiro De Eletromiografia E Cinesiologia E X Simpósio De Engenharia Biomédica

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Craniofacial measurements based on 3D-CT volume rendering: implications for clinical applications

Abstract: 3D-CT volume rendering images using craniometric measurements can be used for anthropological studies involving craniofacial applications.

Cited by 179 publications

References 21 publications

Measurement accuracy of a computer-assisted three-dimensional analysis and a conventional two-dimensional method

Measurement accuracy of a computer-assisted three-dimensional analysis and a conventional two-dimensional method

Three-dimensional evaluation of soft tissue change gradients after mandibular setback surgery in skeletal Class III malocclusion

Comparação Do Modo De Ação De Dois Aparelhos Orais De Avanço Mandibular Para Tratamento De Apneia Obstrutiva Do Sono – Relato De Caso

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