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3. Exploratory Analysis of Objective Outcome Measures for the Clinical Assessment of Erosive Tooth Wear.

Author

Romero, Maria, Ungar, Peter, Lippert, Frank, Zero, Domenick, Zunt, Susan, Eckert, George, Gossweiler, Ana, Elkington-Stauss, Dylan, Tamayo-Cabeza, Guillermo, Kelly, Adam, Bartels, Troy, Kita, Camille, Wewers, Elizabeth, Hara, Anderson, and Fried, Daniel

Subjects
BEWE, dental enamel, enamel surface texture, erosive tooth wear, optical coherence tomography
Abstract

This study proposed using enamel surface texture and thickness for the objective detection and monitoring of erosive tooth wear (ETW), comparing them to the standard subjective Basic Erosive Wear Evaluation (BEWE). Thirty-two subjects (n = 597 teeth) were enrolled in this longitudinal observational clinical study. Enamel thickness (by cross-polarization optical coherence tomography, CP-OCT) and 3D dental microwear parameters, i.e., area-scale fractal complexity (Asfc), anisotropy (Str), and roughness (Sa) (by white-light scanning confocal profilometry), were obtained from buccal surfaces. Buccal, occlusal, and lingual surfaces were scored for BEWE and the maximum score per tooth (BEWEMax) was determined at baseline and 12 months (M12). Data outcome relationships were evaluated (alpha = 0.05). Enamel thickness decreased (p < 0.001), BEWE scores, Sa, and Str increased (p < 0.001), while Asfc did not change at M12. Baseline BEWEBuccal correlated strongly with BEWEMax (r = 0.86, p < 0.001) and moderately with BEWELingual (r = 0.42, p < 0.001), but not with enamel thickness (r = 0.03, p = 0.43). Change (Δ) in surface texture outcomes correlated poorly but significantly with ΔBEWEBuccal (r = -0.15-0.16, p < 0.001) and did not correlate with Δenamel thickness (r = 0.02-0.09, p > 0.06). Teeth with BEWE progression revealed a greater increase in ΔSa and ΔStr. These findings suggest that enamel surface roughness can potentially determine ETW severity, and CP-OCT may be relevant for clinically monitoring enamel thickness.

Published
2023

11. Cross‐polarization optical coherence tomographic assessment of in situ simulated erosive tooth wear

Author

Romero, Maria Jacinta Rosario H, Bezerra, Savio JC, Fried, Daniel, Yang, Vincent, Lippert, Frank, Eckert, George J, Zero, Domenick T, and Hara, Anderson Takeo

Subjects
Analytical Chemistry, Medicinal and Biomolecular Chemistry, Chemical Sciences, Clinical Research, Bioengineering, Cross-Over Studies, Humans, Tomography, Optical Coherence, Tooth Erosion, Tooth Wear, X-Ray Microtomography, dental erosion, enamel, erosive tooth wear, optical coherence tomography, Optical Physics, Medical Biotechnology, Optoelectronics & Photonics, Analytical chemistry, Medicinal and biomolecular chemistry
Abstract

This clinical study tested cross-polarization optical coherence tomography (CP-OCT) monitoring of erosive tooth wear (ETW). Twenty participants completed a 14-day/arm, 3-arm crossover study simulating different ETW severities. Participants received two enamel specimens (per arm) and were randomized to: severe (s-ETW, lemon juice/pH:2.5/4.25%wt/vol citric acid), moderate (m-ETW, grapefruit juice/pH:3.5/1.03%wt/vol citric acid), and non-ETW (water). Enamel thickness was measured with CP-OCT (day[D] 0, 7, 14) and micro-computed tomography (μ-CT; D14). Enamel surface loss was determined with CP-OCT and optical profilometry (OP; D7, D14). CP-OCT showed higher enamel surface loss for D14 than D7 for m-ETW (P = .009) and s-ETW (P = .040) and differentiated severity at D14 (s-ETW > non-ETW, P = .027). OP was able to differentiate surface loss between days (D7

Published
2021

42. Susceptibility of fluorotic enamel to dental erosion-abrasion

Author

SILVA, Cristiane Araújo Maia, SOUSA, Frederico Barbosa de, MARTINEZ-MIER, Esperanza Angeles, KELLY, Adam Benjamin, ECKERT, George J., and HARA, Anderson Takeo

Subjects
Fluorosis, Dental, Tooth Erosion, Tooth Abrasion, Dental Enamel
Abstract

Dental hard tissue conditions can be of pre- or post-eruptive nature, such as enamel fluorosis and erosive tooth wear (ETW), respectively. Dental enamel fluorosis is caused by the chronic and excessive intake of fluoride during enamel development, leading to increased fluoride concentration and increased porosity. ETW has become a common clinical condition and often impairs dental function and aesthetics. This in vitro study tested the hypothesis that fluorotic enamel presents different susceptibility to dental erosion-abrasion. It consisted of a 3×3×2 factorial design, considering a) fluorosis severity: sound (TF0), mild (TF1-2), moderate (TF3-4); b) abrasive challenge: low, medium, and high; and c) erosive challenge: yes or no. A total of 144 human teeth were selected according to the three fluorosis severity levels (n=48), and subdivided into six groups (n = 8) generated by the association of the different erosive and abrasive challenges. Enamel blocks (4×4 mm) were prepared from each tooth and their natural enamel surfaces subjected to an erosion-abrasion cycling model. After cycling, the depth of the lesions in enamel was assessed by profilometry. ANOVA showed that the three-way and two-way interactions among the factors were not significant (p > 0.20). Enamel fluorosis level (p=0.638) and abrasion level (p = 0.390) had no significant effect on lesion depth. Acid exposure caused significantly more enamel surface loss than water (p < 0.001). Considering the limitations of this in vitro study, fluorosis did not affect the susceptibility of enamel to dental erosion-abrasion.

Published
2023

46. Relationships between Dental Topography, Gross Wear, and Bang and Ramm/Liversidge and Molleson Age Estimates for a Sample of Human Premolar Teeth

Author

Roberts, Grace, Paul, Kathleen S., Hara, Anderson T., Algarni, Amnah, Ungar, Peter S., Roberts, Grace, Paul, Kathleen S., Hara, Anderson T., Algarni, Amnah, and Ungar, Peter S.

Abstract

Objectives: Molar crown wear is often used in bioarchaeological research as a proxy for age at death. However, a small number of researchers have used premolars or compared the application of different methods of relative age estimation. Material and methods: Using a sample of 197 previously extracted maxillary first premolars from US dental patients, we considered three protocols for estimating age: the Bang and Ramm/Liversidge and Molleson (BRLM) age estimate method, occlusal topographic analysis, and the Smith system of macrowear scoring. A previous study utilizing the Bang and Ramm method yielded an age estimate range of 9.4 to 10.8 years for the sample. Results: Our analyses showed no associations between occlusal topography parameters (occlusal slope, relief, or faceting) and BRLM age estimates, but some concordance was found between Smith scoring and BRLM ages estimates and between Smith scoring and occlusal topography parameters. Conclusion: The results of the present study suggest that relationships between gross tooth wear, tooth shape, and dental age estimates are complex, and available methods should be considered together to gain a more comprehensive understanding of how teeth change their shape with wear through-out the lifecourse., Svrha: Trošenje zubne krune kutnjaka često se koristi u bioarheološkim istraživanjima za procjenu dobi u trenutku smrti. No u nekoliko takvih analiza upotrijebljeni su pretkutnjaci ili se uspoređivala primjena različitih metoda procjene relativne dobi. Materijal i metode: Koristeći se uzorkom od 197 izvađenih prvih maksilarnih pretkutnjaka stomatoloških pacijenata iz SAD-a, u radu razmatramo tri protokola za procjenu dobi – prema Bangu i Ramm/Liversidgeu te Mollesonu (BRLM), okluzalnu topografsku analizu i Smithovu metodu za sustav bodovanja makroistrošenosti. U prethodnoj studiji koja se koristila metodom Banga i Ramma dobiven je raspon procijenjene dobi od 9,4 do 10,8 godina za uzorak. Rezultati: Naše analize nisu pokazale povezanost između parametara okluzalne topografije (okluzalni nagib, reljef ili faseta) i procjene starosti BRLM-a, i određenu podudarnost između Smithova bodovanja i procjena starosti BRLM-a te između Smithova bodovanja i parametara okluzalne topografije. Zaključak: Dobiveni rezultati sugeriraju da su odnosi između gruboga trošenja zuba, njihova oblika i procjene starosti složeni, a dostupne metode treba razmotriti zajedno kako bi se steklo sveobuhvatnije razumijevanje o tome kako zubi tijekom života trošenjem mijenjaju oblik.

Published
2023

47. Effect of Three Chemical Agents on Stain Removal from Dentin Caries Lesions Treated with Silver Diamine Fluoride.

Author

Rodrigues Vieira, Basílio, Costa Cruz, Sara Brito Silva, Maia Silvaa, Cristiane Araújo, Lippert, Frank, Kelly, Adam, Hara, Anderson Takeo, and Barbosa de Sousa, Frederico

Subjects
HYDROGEN peroxide, SILVER, FLUORIDES, TWO-way analysis of variance, TOOTH sensitivity, MEDICAL protocols, DENTAL caries
Abstract

Introduction: This in vitro study aimed to evaluate the effect of three different chemical agents on stain removal and mineral uptake of artificial dentin caries (ADC) lesions treated with silver diamine fluoride (SDF). Methods: Baseline L*a*b* values were determined in polished human permanent dentin blocks, and ADC lesions were induced with an acid gel for 1 week. Samples were assigned to four groups; in three groups, half of each sample received SDF (30% SDF for 3 min), while the other half received SDF followed by a bleaching treatment protocol (garlic extract, bentonite, or 35% hydrogen peroxide). The fourth group had one SDF-treated half and one half without SDF. Color changes (ΔE) were measured by spectrometry, and transversal microradiography was used to quantify integrated mineral loss (ΔZ) 24 h after treatment (SDF or SDF + bleaching). A two-way mixed ANOVA was applied to thirty percent. Results: SDF application increased mineral uptake by ADC (p = 0.001). The type of chemical agent evaluated (p < 0.0001), time (p = 0.01), and their interaction (p < 0.0001) bleached the ADC treated with SDF. However, 35% hydrogen peroxide was the only compound with a bleaching effect (p < 0.001), without returning to baseline color. None of the compounds altered the mineral uptake effect of SDF (p = 0.30). Conclusion: This in vitro study showed mineral uptake effect in ACD within 24 h after SDF application and the ability of hydrogen peroxide to partially remove (reduction of 24%) the staining caused by SDF without affecting its mineral uptake effect. [ABSTRACT FROM AUTHOR]

Published
2024
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