Using three‐dimensional imaging to assess treatment outcomes in orthodontics: a progress report from the University of the Pacific

Baumrind, Sheldon; Carlson, Skylar; Beers, A; Curry, Sean; Norris, Kevin; Rl, Boyd

doi:10.1034/j.1600-0544.2003.246.x

Cited by 54 publications

(25 citation statements)

References 7 publications

(10 reference statements)

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“…It seems to be that the fullest understanding of growth and treatment processes could be obtained by integrating data from these several sources into a continuous integrated system, to produce an integrated stereo model that begins to meet the needs of clinical orthodontists (Baumrind et al 2003).…”

Section: Perspectivesmentioning

confidence: 99%

New challenges for reverse engineering in facial treatments: How can the new 3D non-invasive surface measures support diagnoses and cures?

Galantucci

2010

Virtual and Physical Prototyping

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Reverse engineering can give new challenges for diagnosis and facial treatments, offering 3D measurements, impossible to obtain only few years ago, in terms of richness of information, precision, accuracy and reliability. In this paper the main aspects and methods for skull and facial scanning and measurement are analyzed, considering volumetric methods (CT, MRI) and surface approaches (laser scanning, structured light and photogrammetry). These latter are particularly interesting because they avoid exposing the patient to ionising radiation and to any biological risk. The EU directives in fact require minimisation of radiographic exposure, that will be in the near future justified only for real diseases, but not for aesthetic treatments and surgery, orthodontics, and malocclusions. Photogrammetry is very promising for the digital reconstruction of human faces; it seems to offer the best compromise with respect to realistic and accurate reproduction, processing time, simplicity and cost of equipment. New software platforms have been developed to integrate the information acquired using different tools: photogrammetry, CT/Cone beam computerized tomography (CBCT), laser scans of dental cast study models. In this way a powerful multi-user database system can be realised to track the patient's imaging history throughout the treatment cycle and to forecast the growth and the results of the treatments.

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Section: Perspectivesmentioning

confidence: 99%

New challenges for reverse engineering in facial treatments: How can the new 3D non-invasive surface measures support diagnoses and cures?

Galantucci

2010

Virtual and Physical Prototyping

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“…[20] This started the era of the use of 3D imaging in dental disciplines and particularly in orthodontics, e.g., Upper airway evaluation,[21] periodontal evaluation for implant loading,[22] evaluating surgical outcome,[2324] and assessing orthodontic treatment outcomes. [25] In a literature review done by De Vos for 86 articles in the clinical application of CBCT in the oral and maxillofacial region, it was found that 16% of these articles are related to orthodontics. [26] The wide application of 3D imaging in orthodomtics can be due to the accurate 3D representation of a subject, low radiation and the possibility of conversion from 3D images to two-dimensions (2D) images when required.…”

Section: Introductionmentioning

confidence: 99%

Measuring mandibular asymmetry in Class I normal subjects using 3D novel coordinate system

Kheir

Kau

2014

Ann Maxillofac Surg

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Introduction:Orthodontic treatment plays a major role in cosmetic dentistry. A harmonious facial balance is normally the end point in comprehensive orthodontic outcomes. In order to achieve this goal, correct diagnosis of asymmetry should be done starting from the outer facial morphology forms and progressively moving to the dental occlusion. The prime importance of measuring mandibular asymmetry is its tremendous effect on the occlusion.Objective:The aim of this study was to measure mandibular asymmetry in a cohort Class I molar relationship comparing right and left sides using new three-dimensions (3D) imaging technique with the aid of 3D software (in vivo 5.2.3 [San Jose, CA]).Materials and Methods:35 DICOM files were initially collected retrospectively and seven were excluded due to (1) condylar resorption, (2) history of trauma and (3) unclear DICOM file. A new coordinate system was set for the mid-sagittal plane (MSP), Frankfort horizontal plane and frontal plane (FP). Each cone beam computed tomography (CBCT) was appraised using 16 evaluation criteria bilaterally. Five mandibular landmarks were selected: Condylion_R, Gonion_R, Menton, Gonion_L and Condylion_L. Using these points, the mandible was further divided into four parts: (1) Ramus length right side, body of the mandible right side, body of the Ramus left side and Ramus length left side. The angles between each line and the three different planes were acquired in order to compare each line from a 3D aspect. Mean and standard deviation were calculated for the 28 CBCTs.Results:Significant bilateral differences were reported in the angle between the ramus length and MSP and the ramus length and the FP (P < 0.05). Significant lateroanterior shift of the mandibular ramus on the left side in comparison with the right side.Conclusion:Viewing an object using three different angles between the four parts of the mandible and each plane is a valid method to replicate the actual object.

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“…One is the high cost of scanning hardware, but even more important drawbacks are their frequently cumbersome use and the lack of efficient 3D analysis software, standardization, and easy calibration. These obstacles, however, will be overcome eventually (e.g., Baumrind et al, 2003). Meanwhile, one can ask if there are situations where 2D measurements would be sufficient and would provide a trade-off between accuracy on the one hand and simplicity, cost, and time on the other.…”

mentioning

confidence: 97%

Palatal Surface Area of Maxillary Plaster Casts—A Comparison between Two-Dimensional and Three-Dimensional Measurements

Darvann

Hermann

Ersbøll³

et al. 2007

The Cleft Palate-Craniofacial Journal

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Error sources in the measurement of three-dimensional palatal segment surface area from a two-dimensional photograph were identified as photographic distortion (2.7%), interobserver error (3.3%), variability in the orientation of the plaster cast (3.2%), and natural shape variation (4.6%). The total error of determining the cleft area/palate surface area ratio was 15%. In population studies, the effect of using two-dimensional measurements is a decrease of discriminating power. In well-calibrated setups, a two-dimensional measurement of the cleft area/palate surface area ratio may be converted to a three-dimensional measurement by use of a multiplication factor of 0.75.

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Using three‐dimensional imaging to assess treatment outcomes in orthodontics: a progress report from the University of the Pacific

Cited by 54 publications

References 7 publications

New challenges for reverse engineering in facial treatments: How can the new 3D non-invasive surface measures support diagnoses and cures?

New challenges for reverse engineering in facial treatments: How can the new 3D non-invasive surface measures support diagnoses and cures?

Measuring mandibular asymmetry in Class I normal subjects using 3D novel coordinate system

Palatal Surface Area of Maxillary Plaster Casts—A Comparison between Two-Dimensional and Three-Dimensional Measurements

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