Dental age estimation through volume matching of teeth imaged by cone-beam CT

Yang, Fan; Jacobs, Reinhilde; Willems, Guy

doi:10.1016/j.forsciint.2006.02.031

Cited by 185 publications

(173 citation statements)

References 7 publications

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“…The current standard of care for overlay-free imaging in orthodontics is conventional CT. 41 Low-cost office-based CBCT imaging has recently been explored for orthodontic applications, including assessment of palatal bone thickness, skeletal growth patterns, dental age estimation, upper airway evaluation, and visualization of impacted teeth. [42][43][44][45][46][47] Although preliminary results are encouraging, established cross-sectional techniques such as conventional CT provide superior image quality of dental and surrounding structures for advanced orthodontic treatment planning. 41 Low dosing requirements appear to remain a benefit of CBCT when compared with conventional CT, with a routine orthodontic CBCT study delivering an effective dose of Յ61.1 Sv compared with 429.7 Sv for multisection CT. 48 Lateral cephalograms deliver 10.4 Sv in comparison, though without the benefit of 3D structural visualization.…”

Section: Orthodonticsmentioning

confidence: 99%

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Miracle¹,

Mukherji²

2009

AJNR Am J Neuroradiol

301

207

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SUMMARY: Conebeam x-ray CT (CBCT) is being increasingly used for point-of-service head and neck and dentomaxillofacial imaging. This technique provides relatively high isotropic spatial resolution of osseous structures with a reduced radiation dose compared with conventional CT scans. In this second installment in a 2-part review, the clinical applications in the dentomaxillofacial and head and neck regions will be explored, with particular emphasis on diagnostic imaging of the sinuses, temporal bone, and craniofacial structures. Several controversies surrounding the emergence of CBCT technology will also be addressed. C onebeam CT (CBCT) is an advancement in CT imagingthat has begun to emerge as a potentially low-dose crosssectional technique for visualizing bony structures in the head and neck. The physical principles, image quality parameters, and technical limitations relevant to CBCT imaging were discussed in Part 1 of this 2-part series. The second part presented here will highlight the evidence related to CBCT applications in head and neck as well as dentomaxillofacial imaging. Controversial aspects of this technology will also be addressed, including limitations in image quality and its often officebased operational model.CBCT was first adapted for potential clinical use in 1982 at the Mayo Clinic Biodynamics Research Laboratory. 1 Initial interest focused primarily on applications in angiography in which soft-tissue resolution could be sacrificed in favor of high temporal and spatial-resolving capabilities. Since that time, several CBCT systems have been developed for use both in the interventional suite and for general applications in CT angiography. 2,3 Exploration of CBCT technologies for use in radiation therapy guidance began in 1992, 4,5 followed by integration of the first CBCT imaging system into the gantry of a linear accelerator in 1999. 6 The first CBCT system became commercially available for dentomaxillofacial imaging in 2001 (NewTom QR DVT 9000; Quantitative Radiology, Verona, Italy). Comparatively low dosing requirements and a relatively compact design have also led to intense interest in surgical planning and intraoperative CBCT applications, particularly in the head and neck but also in spinal, thoracic, abdominal, and orthopedic procedures. [7][8][9][10][11] Diagnostic applications in CT mammography and head and neck imaging are also under evaluation. 12-14 The technical and clinical considerations pertaining to CBCT imaging in many of these applications have been the subjects of several recent reviews. [15][16][17][18][19] The recent review by Dörfler et al 16 of the neurointerventional applications of CBCT is of particular interest to the field of neuroradiology.The discussion below will focus on the diagnostic and treatment-planning applications of CBCT in dentomaxillofacial and head and neck imaging. Commercially available CBCT systems for dentomaxillofacial imaging include the CB MercuRay and CB Throne (Hitachi Medical, Kashiwi-shi, Chiba-ken, Japan), 3D Accuitomo products (J. Mor...

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Section: Orthodonticsmentioning

confidence: 99%

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Miracle¹,

Mukherji²

2009

AJNR Am J Neuroradiol

301

207

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“…Taking into consideration the limitations of 2D imaging, 3-dimensional (3D) imaging using cone-beam computed tomographic (CBCT) imaging has proven itself as a valuable tool in dentistry (13)(14)(15) as long as radiation doses are controlled at reasonably low levels (16). Moreover, volumetric measurements from CBCT data have been reported and validated in several studies in vitro and in vivo (13)(14)(15)(17)(18)(19)(20).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, volumetric measurements from CBCT data have been reported and validated in several studies in vitro and in vivo (13)(14)(15)(17)(18)(19)(20). The overall aim of this study was to develop a standardized quantitative method for the evaluation and analysis of the outcome of RET based on CBCT volumetric measurements.…”

Section: Introductionmentioning

confidence: 99%

3-dimensional Analysis of Regenerative Endodontic Treatment Outcome

EzEldeen

Gorp

Dessel

et al. 2015

Journal of Endodontics

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Introduction: A growing body of evidence supports the regeneration potential of dental tissues after regenerative endodontic treatment (RET). Nevertheless, a standard method for the evaluation of RET outcome is lacking. The aim of this study was to develop a standardized quantitative method for RET outcome analysis based on cone-beam computed tomographic (CBCT) volumetric measurements. Methods: Five human teeth embedded in mandibular bone samples were scanned using both an Accuitomo 170 CBCT machine (Morita, Kyoto, Japan) and a SkyScan 1174 micro-computed tomographic (mCT) system (SkyScan, Antwerp, Belgium). For subsequent clinical application, clinical data and low-dose CBCT scans (preoperatively and follow-up) from 5 immature permanent teeth treated with RET were retrieved. In vitro and clinical 3-dimensional image data sets were imported into a dedicated software tool. Two segmentation steps were applied to extract the teeth of interest from the surrounding tissue (livewire) and to separate tooth hard tissue and root canal space (level set methods). In vitro and clinical volumetric measurements were assessed separately for differences using Wilcoxon matched pairs test. Pearson correlation analysis and Bland-Altman plots were used to evaluate the relation and agreement between the segmented CBCT and mCT volumes. Results: The results showed no statistical differences and strong agreement between CBCT and mCT volumetric measurements. Volumetric comparison of the root hard tissue showed significant hard tissue formation. (The mean volume of newly formed hard tissue was 27.9 [AE10.5] mm 3 [P < .05]). Conclusions: Analysis of 3-dimensional data for teeth treated with RET offers valuable insights into the treatment outcome and patterns of hard tissue formation. (J Endod 2015;-:1-8)

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“…So that, other methods have to be used to estimate age by radiological determination. The reduction in size of the pulp cavity resulting from a secondary dentine deposition, which is proportional to the age of the individual, is one age predictor measurable in dental radiographs and tomographs as an alternative to more invasive methods [80][81][82][83][84]. In literature, two methods have been used:…”

Section: Scoring Methodsmentioning

confidence: 99%

Defining Dental Age for Chronological Age Determination

Uzuner¹,

Kaygisiz²,

Darendeliler³

2018

Post Mortem Examination and Autopsy - Current Issues From Death to Laboratory Analysis

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Dental age assessment is one of the most reliable methods of chronological age estimation used for criminal, forensic and anthropologic purposes. Visual, radiographic, chemical and histological techniques can be used for dental age estimation. Visual method is based on the sequence of eruption of the teeth and morphological changes that are caused due to function such as attrition, changes in color that are indicators of aging. Radiographs of the dentition can be used to determine the stage of dental development of the teeth from initial mineralization of a tooth, crown formation to root apex maturation. Histological methods require the preparation of the tissues for detailed microscopic examination. The chemical analysis of dental hard tissues determines alterations in ion levels with age, whereas the histological and chemical methods are invasive methods requiring extraction/sectioning of the tooth. In this chapter, the different techniques and considered studies were overviewed in conjunction with their advantages and disadvantages. It needs to be taken into consideration that rather than restricting on one age estimation technique, using the other available techniques additionally and performing repetitive measurements may be beneficial for accurate age estimation.

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Dental age estimation through volume matching of teeth imaged by cone-beam CT

Cited by 185 publications

References 7 publications

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

3-dimensional Analysis of Regenerative Endodontic Treatment Outcome

Defining Dental Age for Chronological Age Determination

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