3D Imaging to Assess Growth and Treatment Effects

Koerich, Leonardo B.; Tüfekçi, Eser; Lindauer, Steven J.

doi:10.1007/978-3-030-00722-5_3

Cited by 5 publications

(6 citation statements)

References 38 publications

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“…As early as 2010, Nalçaci et al demonstrated that 3D cephalometric approaches are fairly reliable and comparable with traditional 2D cephalometry [ 1 ]. In addition, a growing body of evidence continues to demonstrate the application of CBCT in orthodontics as a front-line technology development topic [ 2 , 3 , 4 , 5 , 6 , 7 ]. However, the radiation exposure of cranial CBCTs is still not acceptable in most orthodontic patients, even though the dosage is dramatically reduced compared to when CBCT technology was first applied to orthodontics.…”

Section: Introductionmentioning

confidence: 99%

“…There is no doubt that 2D image-projected 3D structure analysis not only limits the regions that can be evaluated (e.g., mandibular condyle [ 10 ], glenoid fossa [ 11 ], coronoid process, mandibular canal [ 12 ]), but also exposes the findings to inherent and unavoidable errors, such as those rooted in differences in magnification, head position, landmark identification, tracing, and reference lines and planes used for superimposition [ 13 ]. Thus, reliable 3D mandibular structure analysis technologies are in high demand, especially those that can provide valuable information previously inaccessible using 2D methods [ 2 , 3 ]. In particular, Kadiogly et al stated, “Questions that were answered previously in 2D study are being asked again, and new studies are reassessing older and possibly outdated concepts with the aid of CBCT” [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, reliable 3D mandibular structure analysis technologies are in high demand, especially those that can provide valuable information previously inaccessible using 2D methods [ 2 , 3 ]. In particular, Kadiogly et al stated, “Questions that were answered previously in 2D study are being asked again, and new studies are reassessing older and possibly outdated concepts with the aid of CBCT” [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

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A User-Friendly Protocol for Mandibular Segmentation of CBCT Images for Superimposition and Internal Structure Analysis

Lin

Zheng

et al. 2021

JCM

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Background: Since cone-beam computed tomography (CBCT) technology has been widely adopted in orthodontics, multiple attempts have been made to devise techniques for mandibular segmentation and 3D superimposition. Unfortunately, as the software utilized in these methods are not specifically designed for orthodontics, complex procedures are often necessary to analyze each case. Thus, this study aimed to establish an orthodontist-friendly protocol for segmenting the mandible from CBCT images that maintains access to the internal anatomic structures. Methods: The “sculpting tool” in the Dolphin 3D Imaging software was used for segmentation. The segmented mandible images were saved as STL files for volume matching in the 3D Slicer to validate the repeatability of the current protocol and were exported as DICOM files for internal structure analysis and voxel-based superimposition. Results: The mandibles of all tested CBCT datasets were successfully segmented. The volume matching analysis showed high consistency between two independent segmentations for each mandible. The intraclass correlation coefficient (ICC) analysis on 20 additional CBCT mandibular segmentations further demonstrated the high consistency of the current protocol. Moreover, all of the anatomical structures for superimposition identified by the American Board of Orthodontics were found in the voxel-based superimposition, demonstrating the ability to conduct precise internal structure analyses with the segmented images. Conclusion: An efficient and precise protocol to segment the mandible while retaining access to the internal structures was developed on the basis of CBCT images.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A User-Friendly Protocol for Mandibular Segmentation of CBCT Images for Superimposition and Internal Structure Analysis

Lin

Zheng

et al. 2021

JCM

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“…CBCT devices emit on an average, 1.320 to 3.324micro-sievert (μSv) for the mandibular bone and 1.031 to 1.420 μSv for maxillary bones. [ 23 ] Speedy scan: With the CBCT equipment, all information is obtained in just one flip. The method enhances the patient satisfaction and also reduces the period of stay within the hospital.…”

Section: D Imaging Methodsmentioning

confidence: 99%

“…CBCT devices emit on an average, 1.320 to 3.324micro-sievert (μSv) for the mandibular bone and 1.031 to 1.420 μSv for maxillary bones. [ 23 ]…”

Section: D Imaging Methodsmentioning

confidence: 99%

Three dimensional (3D) imaging techniques in orthodontics-An update

Alshammery

2020

J Family Med Prim Care

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3D imaging is a technique which develops or creates the impression of depth within an image by deploying 2D data into 3-dimensional format. To aid in quality regulating processes for industrial purposes, 3D imaging has become an extremely valuable factor. Owing to their various drawbacks, a wide range of investigative methods formulated for demonstration of facial structures and the dentition were dilapidated. Currently in medicine, the most prevalent method is perhaps 3D imaging technique renders thorough and problem specific information regarding hard and the soft tissues, such as Computerized Tomography (CT), Cone Beam Computerized Tomography (CBCT), Micro Computerized Tomography (MCT), 3D laser scanning, structured light technique, stereophotogrammetry or 3D surface imaging systems (3dMD), 3D facial morphometry (3DFM), Tuned Aperture Computed Tomography (TACT), and Magnetic Resonance Imaging (MRI). 3D imaging techniques in orthodontics plays an important role by facilitating more elaborated diagnostic information on the precise cases like patients having craniofacial anomalies. Hence, the aim of this study was to review advances in 3D imaging with in the field of orthodontics.

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Reliability and reproducibility of CBCT assessment of mandibular changes before and after treatment for Class III growing patients – an easy and quick way for evaluation

Hu,

Cheung,

Zhang

et al. 2023

BMC Pediatr

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The objective of this study was to evaluate intraobserver reliability and inter-observer reproducibility of a 3-dimensional (3D) assessment method for mandibular changes of growing patients after orthodontic treatment for Class III malocclusion.Methods Cone-beam computed tomography (CBCT) scans were performed before and after orthodontic treatment for 27 patients. During the scan, the patient was positioned such that his/her mandibular plane was parallel to floor. Three observers independently worked on the DICOM data, reconstructed the pre- and post-treatment 3D models in software, selected the stable anatomical structures (basal bone area from the lingual surface of the symphysis to the distal aspect of the first molars) to guide the automated superimposition process. Then, each observer registered 14 anatomical landmarks on the virtual models, for three times after suitable interval, to generate 3 sets of coordinates; the mean was taken as the coordinates for that particular landmark. The intraobserver reliability and inter-observer reproducibility of the method were analyzed.Results The ICCs was > 0.90 for 25 (92.6%) of the intraobserver assessments. The precision of the measurement method was < 0.3 mm in 24 (88.9%) cases. The interobserver reproducibility errors were < 0.3 mm in 21 of the 27 cases.Conclusions The intraobserver reliability and inter-observer reproducibility of 3D assessment of mandibular changes using the virtual models were excellent.

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3D Imaging to Assess Growth and Treatment Effects

Cited by 5 publications

References 38 publications

A User-Friendly Protocol for Mandibular Segmentation of CBCT Images for Superimposition and Internal Structure Analysis

A User-Friendly Protocol for Mandibular Segmentation of CBCT Images for Superimposition and Internal Structure Analysis

Three dimensional (3D) imaging techniques in orthodontics-An update

Reliability and reproducibility of CBCT assessment of mandibular changes before and after treatment for Class III growing patients – an easy and quick way for evaluation

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