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Physiochemical characteristics: A robust tool to overcome teeth heterogeneity on predicting laser ablation profile
Author(s) -
Loganathan Sarathkumar,
Santhanakrishnan Soundarapandian,
Bathe Ravi,
Arunachalam Muthukumaraswamy
Publication year - 2021
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.34717
Subject(s) - ablation , materials science , laser , laser ablation , fluence , femtosecond , scanning electron microscope , dentin , optics , biomedical engineering , composite material , medicine , physics , engineering , aerospace engineering
To avoid excessive tissue removal and collateral damage, the high‐power density laser is apt for dental surgery also need to have high precision. For high‐precision dental surgery with minimal tissue damage, the present work frames a method to predict laser ablation profile based on surface morphology and chemical composition of dentin. The surface morphology and chemical composition were studied on different dentin samples using scanning electron microscope (SEM) and Energy Dispersive X‐ray Analysis (EDAX), respectively. The key laser ablation parameters ( ω 0 , D eff , and F th ) were determined by laser irradiation study using 800 nm, Ti:Sapphire femtosecond laser at processing condition of 100 fs, 10 kHz and 10 mm/s. The dentin samples show a strong linear correlation between physiochemical characteristics and laser ablation parameters. The surface morphology exhibits a negative linear correlation with threshold fluence, whereas the converse is true for chemical composition. The laser ablation parameters of a random dentin sample are derived from the knowledge of linearity data. From the obtained laser ablation parameters, the complete theoretical ablation profile is constructed and validated with experimental ablation profile. Even though the surface morphology of dentin shows high linearity, the concentration of Ca and P can be used as the most feasible probe in clinical settings. Furthermore, the laser ablation rate and ablation efficiency are predicted by the method to optimize the laser processing condition for any specific teeth. The versatility of the method overcomes the problem of heterogeneity on various teeth and simplifies the method of finding optimal laser processing condition for immaculate laser surgery.