In vitro studies the influence of Nd: YAG laser on dental enamels.

AFM Dental enamels Morphological changes Nd: YAG laser treatment SEM-EDS analysis

Journal

Lasers in medical science

ISSN: 1435-604X

Titre abrégé: Lasers Med Sci

Pays: England

ID NLM: 8611515

Informations de publication

Date de publication:
16 Feb 2024

Historique:

received: 15 09 2023

accepted: 13 02 2024

medline: 16 2 2024

pubmed: 16 2 2024

entrez: 16 2 2024

Statut: epublish

Résumé

The present work aimed at assessing chemical, topographical, and morphological changes induced by Nd : YAG laser treatment of dental enamels by means of energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), and scanning electron microscopy (SEM). Fifteen human enamel specimens were obtained, three of samples were kept untreated as a control while the others twelve samples were equally divided into four groups where each group have a three samples according to treating approach as: G1:(untreated);G2: (treated with Nd:YAG laser, 100 mJ/pulse,10 Hz/1064nm); G3(treated with Nd:YAG laser, 500 mJ/pulse, 10 Hz/1064nm); G4(treated with Nd:YAG laser 1000 mJ/pulse, 10 Hz/1064nm), and finally G5(treated with Nd:YAG laser, 1000 mJ/pulse, 10 Hz/532nm) respectively. Beside many craters and cracks, the AFM results showed fractures with depths of 19.23 nm, 174.7 nm, 216.9 nm, 207.4 nm and 156.5 nm and width of 559.2 nm, 833.4 nm, 1115 nm, 695.0 nm, and 5142 nm for all Groups respectively. The highest surface roughness was found in G5 with 111.4 nm while the lowest surface roughness was found in G1 to be 14.3 nm. The inside surface of the fissures was also rough. The SEM micrographs revealed modifications to the morphology. EDS was used to measure the phosphorous (P), calcium (Ca), oxygen (O), and carbon (C) percentages presented in crater areas and their surroundings, Ca, P, O, and C levels were observed to vary significantly at the crater and its rim, a lower percentage of C wt% were realized corresponding to laser treatment of 1000 mJ/Pulse laser energy. However, it was not feasible to recognize a specific chemical arrangement in the craters. It is also concluded that the higher depth and particular edge of ablated part when teeth were irradiated by laser with 1000 mJ/10Hz/1064nm.

Identifiants

DOI: 10.1007/s10103-024-04023-0 PMID: 38363355

pubmed: 38363355

doi: 10.1007/s10103-024-04023-0

pii: 10.1007/s10103-024-04023-0

doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

Pagination

Informations de copyright

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