Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2024 May 10;24(1):549.
doi: 10.1186/s12903-024-04292-9.

3D intraoral scanning techniques support the effects of crown morphology on dental caries

Jincheng Hao #  1 , Yuting Kang #  1 , Siyuan Wei  2 , Jing Wang  3 , Haiyan Wang  4
Affiliations

3D intraoral scanning techniques support the effects of crown morphology on dental caries

Jincheng Hao et al. BMC Oral Health. .

Abstract

Background: With the development and utilization of three-dimensional (3D) intraoral scanning (IOS) technology, the morphological characteristics of teeth were quantitatively assessed. In this research, we aimed to explore the prevalence of dental caries in relation to each measurable morphological indicator of the tooth body via 3D intraoral scanning techniques.

Methods: A hospital-based single-centre study was conducted at our hospital from Dec. 2021 to Apr. 2023. A total of 53 patients were involved in the study, providing complete morphological data for 79 teeth. Each patient completed an oral hygiene routine questionnaire and underwent examination by an experienced dentist to evaluate caries conditions before undergoing 3D intraoral scanning to obtain a digital dental model. Geomagic Studio 2014 was used to extract oral morphological data from the models. The acquired data were entered, cleaned and edited using Excel 2016 and subsequently exported to SPSS version 25.0 for analysis. Chi-square analysis and logistic regression analyses were employed to test the associations.

Results: Among the participants, 33 (61.1%) were female, with a mean age of 26.52 ± 10.83 years. Significant associations were found between dental caries and the vertical distance between the distal tip and the gum (OR 14.02; 95% CI 1.80-109.07; P = 0.012), the distal lateral horizontal distance of occlusion (OR 0.40; 95% CI 0.18-0.90; P = 0.026), and the mesial horizontal distance of occlusion (OR 2.20; 95% CI 1.12-4.31; P = 0.021). The Hosmer-Lemeshow test indicated a P value of 0.33.

Conclusions: The vertical distance between the distal tip and the gum, the distal lateral horizontal distance of the occlusion and the mesial horizontal distance of the occlusion were the influencing factors for dental caries (identified as independent risk factors). We hypothesize that these factors may be associated with the physiological curvature of teeth and the role of chewing grooves in plaque formation over time. However, further studies involving larger population samples and more detailed age stratification are still needed.

Keywords: 3D intraoral scanning technology; Dental caries; Oral health; Predictors; Tooth morphology.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
(a) When the “object mover” function was activated, the model was adjusted so that the x-, y- and z-axes were parallelized to the buccolingual diameter, mesiodistal diameter, and gingival tooth distance, respectively. (b) As the model was adjusted, the information at the bottom left represents each parameter we needed. The values of X, Y and Z represent the buccolingual diameter, mesiodistal diameter, and gingival tooth distance, respectively. In this case, the buccolingual diameter, mesiodistal diameter and gingival tooth distance were 10.5110 mm, 11.3309 mm and 6.1151 mm, respectively
Fig. 2
Fig. 2
(a) In this view, we can clearly judge the angle malocclusion classification, and we can identify this example as angle I. (b) This picture was applied to the tooth, and the distance between the mesial and distal sides can be easily measured. The mesial distance can be acquired by metering between point 1 and point 2. The mesial-overbite length was 1.552905 mm (distance on X), and the mesial-overjet length was 0.906138 mm (distance on Z). The distal-overbite and distal-overjet lengths can be obtained by the same method that is metred between point 3 and point 4
Fig. 3
Fig. 3
(a) This group of teeth was regarded as negative samples (tooth without caries). The conditions of the sealed tooth, normal tooth and slightly worn tooth are shown from left to right. (b) This group of teeth was regarded as positive samples (tooth with caries). The conditions of obviously decayed teeth, filled teeth and dentin eroded teeth are shown from left to right
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Global oral health. status report: towards universal health coverage for oral health by 2030. https://www.who.int/publications-detail-redirect/9789240061484. Accessed 28 Apr 2023.
    1. Jain N, Dutt U, Radenkov I, Jain S. WHO’s global oral health status report 2022: Actions, discussion and implementation. Oral Dis. 2023. - PubMed
    1. O’Brien KJ, Forde VM, Mulrooney MA, Purcell EC, Flaherty GT. Global status of oral health provision: identifying the root of the problem. Public Health Chall. 2022;1:e6. doi: 10.1002/puh2.6. - DOI
    1. Petersen PE, Bourgeois D, Ogawa H, Estupinan-Day S, Ndiaye C. The global burden of oral diseases and risks to oral health. Bull World Health Organ. 2005;83:661–9. - PMC - PubMed
    1. Yee R, Sheiham A. The burden of restorative dental treatment for children in Third World countries. Int Dent J. 2002;52:1–9. doi: 10.1111/j.1875-595X.2002.tb00589.x. - DOI - PubMed

Publication types