The reliability and validity of measurements of human dental casts made by an intra-oral 3D scanner, with conventional hand-held digital callipers as the comparison measure

Rajshekar, Mithun; Julian, Roberta; Williams, Anne-Marie; Tennant, Marc; Forrest, Alex Stewart; Walsh, L. J.; Wilson, Graham K.; Blizzard, Leigh

doi:10.1016/j.forsciint.2017.07.009

Cited by 26 publications

(13 citation statements)

References 31 publications

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“…Rajshekar et al (18) stated that intra-oral 3D scanner a reliable and valid method for measuring the key features of virtual 3D dental casts. This technique has excellent potential for recording and accurately measuring dental features for forensic purposes including bite-mark analysis, and for research purposes.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Marginal and Internal Fit of Copings Fabricated from Polyetheretherketone and Zirconia: An in-vitro study

Makky

Shokry

Metwally

2020

Al-Azhar Journal of Dental Science

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Objective: This study evaluated the marginal and internal fit of pressable versus machinable polyetheretherketone (PEEK) and versus zirconia copings. Material and Methods: Twenty one copings of lower molar were used in this study, which were divided according to type of material used and method of manufacturing into three main groups: seven specimens each, zirconia (Zr), PEEK CAD (PC) and PEEK press (Pp) groups. Copings were subjected to three dimension (3D) analysis of marginal and internal fit by using a triple scan protocol. Results: The results of this study showed that zirconia group recorded statistically significant P=0.02 (P<0.05) lower absolute marginal gap mean value (60 ±10 µm) than PEEK CAD (69 ± 0.00µm) and PEEK press group (69 ± 10µm). Among internal fit There was no statistical significant difference between the three groups as p =0.36 (> 0.05) but PEEK press showed better internal fit. (126±30 µm), (130±40 µm) and (112±40 µm) for zirconia, PEEK CAD and PEEK press respectively. Conclusion: Marginal and internal fit for the three groups were within the acceptance range while zirconia copings show significance superior marginal fit than PEEK groups.

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Section: Discussionmentioning

confidence: 99%

Comparison of Marginal and Internal Fit of Copings Fabricated from Polyetheretherketone and Zirconia: An in-vitro study

Makky

Shokry

Metwally

2020

Al-Azhar Journal of Dental Science

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“…The most obvious approach is in application of existing measurements * Corresponding author techniques on digital images. It encourages by its results, including improvements in odontometry (enabling contour measurements, for instance) (Smith et al, 2009), (Naidu and Freer, 2013a), (Naidu and Freer, 2013b) on the other hand such studies are necessary for introductions of new techniques or devices (Rajshekar et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

3d Images for Automated Digital Odontometry

Gaboutchian¹,

Knyaz

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. Improvements of existing and development of new non-contact measurement techniques, especially for surfaces of complex spatial shape, allow involvement of various disciplines into advanced technological reality. These improvements have two major directions. The first, being more obvious, refers to introduction of accurate digital 3D images in spheres where real objects have become subjects of traditional study, techniques or manufacturing technologies. The other direction deals with substantial methodological improvements, as they become possible only with introduction of the above-mentioned techniques. Among such is the division of physical anthropology, of dentistry and other disciplines related to dental studies, – odontometry, or measurements of teeth. Traditional odontometry, by turning into automated digital odontometry, becomes a method of accurate and objective morphological assessments in dentistry and anthropology, including palaeoanthropology. As a new method, automated digital odontometry requires interpretations of dental morphology (applicable in digital techniques), accurate 3D images of teeth and software based on 3D and 2D image analysis suitable for automated measurements. The mentioned factors are particularly important for this method due to its inapplicability on real objects. Thus various approaches to obtaining digital images are discussed in the context of their quality and conformity with the studied material and odontometric technique, which currently includes automated orientation algorithms setting locations for principal morphological structures and measurement algorithms themselves, likewise functioning in an automated mode.

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“…As a support of technological innovations in tooth measurements various types of dental laboratory or similar scanners are found to be suitable for studies, including measurements on separate teeth (Jacob et al, 2015). Reliability of images obtaining equipment and has been assessed in different combinations of intraoral, optical, laser or CT scanners (Al-Rawi et al, 2010), (Rajshekar et al, 2017), (Sang et al, 2016).…”

Section: Related Workmentioning

confidence: 99%

Automated Digital Odontometric Study of Manual and Computer-Aided Methods of Tooth Crown Modelling in Dentistry

Gaboutchian¹,

Knyaz

Apresyan

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> One of the most widely used methods of prosthetic treatment in dentistry is restoration of damaged teeth by artificially fabricated crowns, which, regardless of technological variations, always pass through modelling stage. The main two methods of restoration modelling are traditionally used manual and becoming more advanced and widespread computer-aided, or digital. A similar situation is observed in odontometry – tooth measurements – where manual and digital approaches meet, fuse and new methods, as automated digital odontometry, appear. In this study the measurement method is applied to crowns modelled by different dental technicians on trial basis for teeth, prepared on stone cast model of complete dental arches. The same plaster models, before and after tooth preparations, as well as after modelling tooth crowns manually, were scanned for comparative and modelling (this time using computer-aided techniques) reasons. The obtained 3D images were used for measurements by digital automated odontometry to estimate differences of modelled crowns with initial shape of intact, subjected to experimental preparation and restoration, tooth. Comparisons were made within each, manual and digital, crown modelling groups as well; thus comparisons of proposed on default by professional dental software crown shapes were made, and in line with it the influence of different technicians adjustments on modelling precision was estimated. At the same time the measurement method was tested as well by determining the most characteristic differentiating odontometric parameters for the study, which is held largely due to and on the basis of photogrammetric techniques.</p>

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The reliability and validity of measurements of human dental casts made by an intra-oral 3D scanner, with conventional hand-held digital callipers as the comparison measure

Cited by 26 publications

References 31 publications

Comparison of Marginal and Internal Fit of Copings Fabricated from Polyetheretherketone and Zirconia: An in-vitro study

Comparison of Marginal and Internal Fit of Copings Fabricated from Polyetheretherketone and Zirconia: An in-vitro study

3d Images for Automated Digital Odontometry

Automated Digital Odontometric Study of Manual and Computer-Aided Methods of Tooth Crown Modelling in Dentistry

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