Reliability of 3D dental and skeletal landmarks on CBCT images

Park, Joorok; Baumrind, Sheldon; Curry, Sean; Carlson, Skylar; Boyd, Robert L.; Oh, Heesoo

doi:10.2319/082018-612.1

Cited by 27 publications

(21 citation statements)

References 14 publications

(26 reference statements)

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“…19,20 In this study, in order to reduce errors in landmark identification, a CBCT-based dentofacial image was chosen as reference standard. 21 Five landmarks were digitized on the original digital dental model before the registration procedure. Subsequently, the original dental model was duplicated to the reference standard to avoid error from landmark identification.…”

Section: Discussionmentioning

confidence: 99%

Integration of digital maxillary dental casts with 3D facial images in orthodontic patients:

Xiao¹,

Liu²,

Gu³

2019

The Angle Orthodontist

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Objective To evaluate three-dimensional (3D) accuracy and reliability of nonradiographic dentofacial images integrated with a two-step method. Methods 3D facial images, cone-beam computed tomography (CBCT) images and digital maxillary dental casts were obtained from 20 pre-orthodontic subjects. Digital dental casts were integrated into 3D facial images using a two-step method based on the anterior tooth area. 3D coordinate values of five dental landmarks were identified in both dentofacial images and CBCT images. The accuracy of the integration method was assessed with paired t-tests between dentofacial images and CBCT-based reference standards. Intraclass correlation coefficients (ICCs) were assessed for the reliability of dentofacial images and CBCT-based images. Analysis of variance and Kruskal-Wallis tests evaluated the accuracy of the method in different dimensions. Results There was no statistical difference between dentofacial images and CBCT reference standards in both translational and rotational dimensions (P > .05). Translational mean absolute errors for full dentitions were within 0.42 mm and ICCs were over 0.998 in x, y, and z directions. Rotational mean absolute errors for full dentitions were within 0.92° and ICCs over 0.734 in pitch, yaw, and roll orientations. Integration errors were significantly greater in the first molar, z-translation, and pitch rotation (P < .05). Conclusions Integrating 3D dentofacial images with the two-step method is precise and acceptable for clinical diagnostics and scientific purposes. Errors were greater in the molar region, z-translation, and pitch rotation.

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Section: Discussionmentioning

confidence: 99%

Integration of digital maxillary dental casts with 3D facial images in orthodontic patients:

Xiao¹,

Liu²,

Gu³

2019

The Angle Orthodontist

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“…The geometric accuracy of the 3Shape R700 scanner was verified to be 0.02 mm. Previous studies have proven that landmarking dental 3D models is reliable [11] and the measurements on 3D surfaces have excellent accuracy [12].…”

Section: Methodsmentioning

confidence: 99%

Effect of cervical headgear on dental arch area, shape and interarch dimensions

et al. 2020

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Purpose The goal was to study the effects of early cervical headgear treatment on maxillary and mandibular dental arch area, shape and interarch dimensions. Methods The total study group comprised 67 children aged 7.6 years (standard deviation 0.3) with Angle class II malocclusion collected between 1992 and 1996. The children were randomly divided into two groups of equal size. In the first group, cervical headgear treatment was started immediately and undertaken for 2 years. The remaining patients served as untreated controls. Dental casts were taken and scanned at the beginning of treatment (T0) and at the 2‑year (T1) and 4‑year follow-up (T2). Three-dimensional landmarks describing the positions of maxillary and mandibular incisors, canines, first and second premolars and first molars were used to calculate and visualize the maxillary and mandibular dental arch area and shape using the polynomial equation y = Ax6 + Bx2. Results Significant changes in the shape and area of both maxillary and mandibular dental arches were induced with cervical headgear. The headgear increased dental arch area, sagittal dimensions at the mid-sagittal line and transversal dimensions at all of the measured levels in both dental arches compared to the control group. Conclusions Cervical headgear is an effective treatment device to gain space in both dental arches. Furthermore, when used as an early phase treatment, relapse is relatively small compared to the gained space.

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“…A radical turnaround in clinical procedures and in the way of technical preparation of implantation using CAD/CAM methods is worked. They include the authors' own methods [3,[206][207][208]210,212,223,244,245] regarding data acquisition by means of cone-beam computed tomography (CBCT) in planning and performing implant prosthetic treatment and also in endodontics and orthodontics [408][409][410][411][412][413][414][415][416][417][418][419][420][421][422][423][424][425][426][427].…”

Section: General Characteristics Of the Dentistry 40 Stage Of Designmentioning

confidence: 99%

Dentistry 4.0 Concept in the Design and Manufacturing of Prosthetic Dental Restorations

Dobrzański¹,

Dobrzański²

2020

Processes

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The paper is a comprehensive but compact review of the literature on the state of illnesses of the human stomatognathic system, related consequences in the form of dental deficiencies, and the resulting need for prosthetic treatment. Types of prosthetic restorations, including implants, as well as new classes of implantable devices called implant-scaffolds with a porous part integrated with a solid core, as well as biological engineering materials with the use of living cells, have been characterized. A review of works on current trends in the technical development of dental prosthetics aiding, called Dentistry 4.0, analogous to the concept of the highest stage of Industry 4.0 of the industrial revolution, has been presented. Authors’ own augmented holistic model of Industry 4.0 has been developed and presented. The studies on the significance of cone-beam computed tomography (CBCT) in planning prosthetic treatment, as well as in the design and manufacture of prosthetic restorations, have been described. The presented and fully digital approach is a radical turnaround in both clinical procedures and the technologies of implant preparation using computer-aided design and manufacturing methods (CAD/CAM) and additive manufacturing (AM) technologies, including selective laser sintering (SLS). The authors’ research illustrates the practical application of the Dentistry 4.0 approach for several types of prosthetic restorations. The development process of the modern approach is being observed all over the world. The use of the principles of the augmented holistic model of Industry 4.0 in advanced dental engineering indicates a change in the traditional relationship between a dentist and a dental engineer. The overall conclusion demonstrates that it is inevitable and extremely beneficial to implement the idea of Dentistry 4.0 following the assumptions of the authors’ own, holistic Industry 4.0 model.

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Reliability of 3D dental and skeletal landmarks on CBCT images

Cited by 27 publications

References 14 publications

Integration of digital maxillary dental casts with 3D facial images in orthodontic patients:

Integration of digital maxillary dental casts with 3D facial images in orthodontic patients:

Effect of cervical headgear on dental arch area, shape and interarch dimensions

Dentistry 4.0 Concept in the Design and Manufacturing of Prosthetic Dental Restorations

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