Demineralization of tooth enamel following radiation therapy; An in vitro microstructure and microhardness analysis

Kudkuli, Jagadish; Agrawal, A. K.; Gurjar, Om Prakash; Sharma, Sunil Dutt; Rekha, P. D.; Manzoor, Muhammed A.P.; Singh, Balwant; Rao, BH Sripathi; Abdulla, Riaz

doi:10.4103/jcrt.jcrt_8_19

Cited by 12 publications

(2 citation statements)

References 31 publications

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“…Although not signi cant, wear pro le and step were lower (considering the median) in control group, although this had high intravariability, which suppressed statistical differences. These results are in agreement with the ndings in the literature, which showed that enamel wear depends on characteristics such as surface roughness and dental microhardness, in addition to being directly related to and affected by the effects of ionizing radiation on exposed dental tissue [29,30]. Several factors are involved in the loss of tooth surface (abrasion), such as the use of abrasive toothpaste, brush with hard bristles, vigorous brushing technique, as well as the use of abrasive materials and consumption of abrasive foods, which may present symptoms such as dentin hypersensitivity, impairment of masticatory function and negative effects on appearance [31], thus highlighting the importance of guiding and monitoring patients undergoing CRT or RT, which may present a greater susceptibility to tooth surface loss and which can be worsened when there is not adequate supervision.…”

Section: Discussionsupporting

confidence: 92%

Abrasive challenge effects on enamel and dentin from irradiated human teeth: an in vitrostudy

Arid

Palma‐Dibb

Oliveira

et al. 2023

Preprint

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Background: The objective of this study was to evaluate wear and surface roughness of in vivo irradiated human enamel and dentin after abrasive challenge. Methods: Using teeth donated by healthy patients or with head and neck cancer who received radiotherapy (RT) or chemoradiotherapy (CRT), 42 enamel and dentin specimens were made, divided into three groups: control, RT and CRT (n = 14 in each group, both for enamel and dentin). The specimens were submitted to an in vitroexperimental abrasive using a brushing machine and wear and surface roughness were evaluated. Results: In enamel specimens, wear profile values of CRT and RT groups were not different from control (p-value >0.05). The RT group presents lower step values than CRT and control groups (p-value <0.001). No significant difference in final surface roughness was observed in all groups (p-value >0.05). In dentin specimens, no significant difference in wear profile and step was observed in all groups (p-value >0.05). However, CRT and RT groups present higher values in final surface roughness (p-value <0.001). Conclusion: The exposure to ionizing radiation (associated or not to chemotherapy) influenced the surface roughness of dentin and the wear (step) of enamel after the in vitro abrasive challenge. Trial registration: Ethical procedures were approved by the FORP/USP Research Ethics Committee (CAAE: 61308416.4.0000.5419) and Hospital do Câncer de Barretos/Fundação Pio XII (CAAE: 61308416.4.3001.5437). Clinical relevance: Considering probable effects of ionizing radiation on teeth structure, understanding the behaviour of enamel and dentin under physiological processes is important to prevent and treat adverse oral side effects related to radiotherapy.

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Section: Discussionsupporting

confidence: 92%

Abrasive challenge effects on enamel and dentin from irradiated human teeth: an in vitrostudy

Arid

Palma‐Dibb

Oliveira

et al. 2023

Preprint

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“…SEM micrographs in Figure 4 show that enamel has smear layers that are close to each other's making its structure rigid, hard and calcified. Pores, bubbles, and open spaces on the dentine surface make it delicate, flexible, and less calcified, which is a primary reason for having lower threshold ablation for Ca as compared to enamel [23][24][25][26][27].…”

Section: Discussionmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy and Microscopy Study of Human Dental Tissues

Mustafa¹,

Latif²,

Jehangir³

2022

Electron Microscopy

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Laser-induced breakdown spectroscopy (LIBS) analysis of human dental tissues: enamel and dentine, performed by utilizing Nd: YAG laser (𝜆=1064 𝑛𝑚, 𝜏=6 𝑛𝑠, 𝐸=50 𝑚𝐽) to investigate threshold ablation of laser energy density. Quantitative results based on the experiment provide us with threshold ablation value of laser energy density for calcium (Ca) ablation in enamel and dentine tissues. The computed threshold laser energy density for Ca ablation in dentin tissue is 0.38 J/cm2, which is significantly lower than the threshold in the enamel, which is 1.41 J/cm2. Scanning electron microscopic (SEM) examination of dental tissues determines that the dentin surface contains pores, voids, and bubbles that make it easy to ablate at low laser energy density, while enamel has a closely packed smear layer structure that is difficult to ablate, requiring high energy densities. These findings are helpful in the field of laser dentistry, where lasers are widely used for dental treatment.

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Color stability and microhardness alteration of irradiated dental enamel treated with a high fluoride concentration toothpaste

et al. 2022

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Demineralization of tooth enamel following radiation therapy; An in vitro microstructure and microhardness analysis

Cited by 12 publications

References 31 publications

Abrasive challenge effects on enamel and dentin from irradiated human teeth: an in vitrostudy

Abrasive challenge effects on enamel and dentin from irradiated human teeth: an in vitrostudy

Laser-Induced Breakdown Spectroscopy and Microscopy Study of Human Dental Tissues

Color stability and microhardness alteration of irradiated dental enamel treated with a high fluoride concentration toothpaste

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