Longitudinal correlation of 3D OCT to detect early stage erosion in bovine enamel

Aden, Abdirahman; Anderson, Paul; Burnett, Gary R.; Lynch, Richard J.M.; Tomlins, Peter H.

doi:10.1364/boe.8.000954

Cited by 8 publications

(11 citation statements)

References 38 publications

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“…In contrast to previous similar studies [20,21,25], which used single-tooth models or enamel samples to investigate 3D systems for detection and monitoring of tooth wear, the current study used dental semi-arches as study models, more reflective of in vivo presentation. The semi-arches included full crowns of multiple teeth where more than one tooth surface was examined, unlike previous studies which assessed individual surfaces of teeth, usually polished to achieve a flat examination plane and often surrounded by a reference plane unaffected by the erosion-abrasion challenge [8,[11][12][13][14][15][16][17]. The latter set-up could more easily allow comparison of the results using other equipment such as surface profilers or optical coherence tomography (OCT) scanners.…”

Section: Discussionmentioning

confidence: 99%

“…The latter set-up could more easily allow comparison of the results using other equipment such as surface profilers or optical coherence tomography (OCT) scanners. The possibility of including a surface profiler or OCT scanner in the current study as comparison methods [8,[11][12][13][14][15][16][17] was contemplated. However, due to the limited scan range of such methods when it comes to the assessment of comparably large three-dimensional models and considering the available data supporting the validity of the IOS system employed in this study [27,28], no comparison method was adopted.…”

Section: Discussionmentioning

confidence: 99%

“…A number of methods other than visual examination have been assessed to aid detection and/or quantification of tooth substance loss [2,5]. Numerous in vitro studies have employed techniques including quantitative light-induced fluorescence (QLF) [8][9][10], profilometry [11][12][13][14][15], and optical coherence tomography (OCT) [8,16]. Applying these methods in vivo is difficult; for example, the use of profilometry is time-consuming as it requires obtaining physical models of the dentition.…”

Section: Introductionmentioning

confidence: 99%

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Detecting early erosive tooth wear using an intraoral scanner system

Michou

Vannahme

Ekstrand

et al. 2020

Journal of Dentistry

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Objectives: To assess the feasibility of detecting and monitoring early erosive tooth wear using a 3D intraoral scanner (IOS) aided by specific software. Methods: Extracted sound permanent teeth were assembled in two shortened artificial dental arches and scanned at different intervals with an IOS (3Shape TRIOS® 3) before and after an erosion/abrasion protocol (i.e. 1 h up to 24 h immersion in citric acid solution and subsequent brushing). The 3D models obtained at consecutive time points were superimposed with the baseline model using dedicated software (3Shape TRIOS® Patient Monitoring, version 2.1.1.0) and reference surface alignment. Surface profile differences between the baseline 3D model and the respective models from different time points were expressed as tooth substance loss. Non-parametric tests were used to assess the significance of tooth substance loss at different time points. Spearman's correlation was applied between the tooth substance loss at the end of each erosion/abrasion cycle and the immersion time in acid. Results: Significant tooth substance loss (0.08 mm, IQR=0.05) was detected by the software after 3 h of erosive-abrasive challenge (p=0.045). The overall median loss increased gradually from baseline to 24 h showing a strong correlation with the immersion time in acid (rs=0.971, p<0.01). Conclusions: The use of an IOS aided by specific software showed good performance for early detection and monitoring of tooth wear in vitro and has promising potential for in vivo application. Clinical significance: Detection and monitoring of early erosive tooth wear can be reliably aided by intraoral scanning supported by specific software. The measurement error and uncertainty involved in this method should be taken into consideration when interpreting the tooth substance loss measurements. Furthermore, presuming the difficulty in defining reference surfaces in vivo, clinical validation is needed to determine the system's in vivo performance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Detecting early erosive tooth wear using an intraoral scanner system

Michou

Vannahme

Ekstrand

et al. 2020

Journal of Dentistry

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“…While this was possible for 500 µm slices, it is more difficult to achieve when imaging whole teeth. Nevertheless, new nonionising light based diagnostic tools [35] such as optical coherence tomography (OCT) are potentially clinically promising for early stage surface softening detection [36] but the penetration limitation does not allow high-resolution bulk enamel demineralisation imaging.…”

Section: B D Cmentioning

confidence: 99%

Acid-induced demineralisation of human enamel as a function of time and pH observed using X-ray and polarised light imaging

et al. 2021

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“…Later, Aden et al . also measured the induced changes in optical properties such as the backscattered intensity from time-series 3D-OCT imaging of bovine enamel with different demineralization solutions 28 . Austin et al .…”

Section: Introductionmentioning

confidence: 99%

Early detection of enamel demineralization by optical coherence tomography

Tsai

Wang

Yeh

et al. 2019

Sci Rep

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Enamel is the outermost layer of the tooth that protects it from invasion. In general, an acidic environment accelerates tooth demineralization, leading to the formation of cavities. Scanning electron microscopy (SEM) is conventionally used as an in vitro tool for the observation of tooth morphology changes with acid attacks. Yet, SEM has intrinsic limitations for the potential application of in vivo detection in the early demineralization process. In this study, a high-resolution optical coherence tomography (OCT) system with the axial and transverse resolutions of 2.0 and 2.7 μm in teeth has been utilized for characterizing the effect of the acidic environment (simulated by phosphoric acid) on the enamel topology. The scattering coefficient and the surface roughness of enamel can be directly derived from the OCT results, enabling a quantitative evaluation of the topology changes with demineralization. The dynamic process induced by the acid application is also recorded and analyzed with OCT, depicting the evolution of the demineralization process on enamel. Notably, the estimated enamel scattering coefficient and surface roughness significantly increase with the application time of acid and the results illustrate that the values of both parameters after demineralization are significantly larger than those obtained before the demineralization, illustrating both parameters could be effective to differentiate the healthy and demineralized teeth and determine the severity. The obtained results unambiguously illustrate that demineralization of the tooth surface can be successfully detected by OCT and further used as an indicator of early-stage cavity formation.

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Longitudinal correlation of 3D OCT to detect early stage erosion in bovine enamel

Cited by 8 publications

References 38 publications

Detecting early erosive tooth wear using an intraoral scanner system

Detecting early erosive tooth wear using an intraoral scanner system

Acid-induced demineralisation of human enamel as a function of time and pH observed using X-ray and polarised light imaging

Early detection of enamel demineralization by optical coherence tomography

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