Modification of dental enamel, dentin by an ultra-fast femtosecond laser irradiation: A systematic review

Lagunov, Victor L; Rybachuk, Maksym; Itthagarun, Anut; Walsh, Laurence J.; George, Roy

doi:10.1016/j.optlastec.2022.108439

Cited by 11 publications

(5 citation statements)

References 62 publications

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“…Here we note that Equation ( 12) is different to the equation proposed by Loganathan et al 24 for ablation efficiency. For multiple pulses, the shape of the cavity can be determined by applying the principle of superposition to Equation (6). There is reasonable justification for this, since a very linear relation between the ablation depth and the number of ablated layers has been observed.…”

Section: Model 1-optical Penetration Of a Gaussian Pulsementioning

confidence: 99%

“…where N is the total number of laser pulses, L is the length of the channel and Vol pulse is the volume of material removed per pulse (Equation 11). Equation ( 21) has a significant advantage over superposition of Equation (6) in that considerably less computational effort is required to predict the channel shape. Figure 9 shows a comparison between Equation ( 21), Model 1 and published data from the literature for the shape of a single-pulse width channel.…”

Section: Multiple Pulse-width Channelmentioning

confidence: 99%

“…Compared with other systems (e.g., 5 ), thermomechanical stress is low and thermal damage can be avoided. 6 Moreover, selective operation, high precision, and minimally invasive treatment mean less healthy dental hard tissue is removed unnecessarily. This is particularly valuable, since unlike many other parts of the human body, dental hard tissue cannot grow back once removed.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, fs laser treatment is anticipated to be more convenient for the patient, reducing pain associated with conventional mechanical forces, with less noise and negligible vibration. Compared with other systems (e.g., 5 ), thermomechanical stress is low and thermal damage can be avoided 6 . Moreover, selective operation, high precision, and minimally invasive treatment mean less healthy dental hard tissue is removed unnecessarily.…”

Section: Introductionmentioning

confidence: 99%

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Optical penetration models for practical prediction of femtosecond laser ablation of dental hard tissue

Woodfield,

Rode,

Dao

et al. 2024

Lasers Surg Med

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ObjectivesTo develop and practically test high‐precision femtosecond laser ablation models for dental hard tissue that are useful for detailed planning of automated laser dental restorative treatment.MethodsAnalytical models are proposed, derived, and demonstrated for practical calculation of ablation rates, ablation efficiency and ablated morphology of human dental enamel and dentin using femtosecond lasers. The models assume an effective optical attenuation coefficient for the irradiated material. To achieve ablation, it is necessary for the local energy density of the attenuated pulse in the hard tissue to surpass a predefined threshold that signifies the minimum energy density required for material ionization. A 1029 nm, 40 W carbide 275 fs laser was used to ablate sliced adult human teeth and generate the data necessary for testing the models. The volume of material removed, and the shape of the ablated channel were measured using optical profilometry.ResultsThe models fit with the measured ablation efficiency curve against laser fluence for both enamel and dentin, correctly capturing the fluence for optimum ablation and the volume of ablated material per pulse. The detailed shapes of a 400‐micrometer wide channel and a single‐pulse width channel are accurately predicted using the superposition of the analytical result for a single pulse.ConclusionsThe findings have value for planning automated dental restorative treatment using femtosecond lasers. The measurements and analysis give estimates of the optical properties of enamel and dentin irradiated with an infrared femtosecond laser at above‐threshold fluence and the proposed models give insight into the physics of femtosecond laser processing of dental hard tissue.

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Section: Model 1-optical Penetration Of a Gaussian Pulsementioning

confidence: 99%

Section: Multiple Pulse-width Channelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optical penetration models for practical prediction of femtosecond laser ablation of dental hard tissue

Woodfield,

Rode,

Dao

et al. 2024

Lasers Surg Med

Self Cite

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“…Thus, the importance of determining the surface quality and the conditions under which the type of chemical bond is formed, depending on the pre-treatment conditions of the dental tissue, has been repeatedly noted [11,19,[22][23][24][25]. Both diamond drills (diamond turbines) and laser irradiation are used in the phase of dental restoration for the layer-by-layer removal of tissue, which in turn can also lead to undesirable effects, including an influence on the chemical and phase composition of dental tissue [24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

A Study of the Effects of Medical Dental Laser and Diamond Drill on Dentin Tissue during Dental Restoration Based on Spectral Imaging and Multivariate Analysis of Synchrotron FTIR Microspectroscopy Data

Seredin,

Goloshchapov,

Buylov

et al. 2023

Photonics

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In our work, the effect of a dental Er:YAG pulsed laser and a diamond cylindrical drill with a turbine handpiece on dentin tissue was studied using spectral imaging. The combination of spectral imaging of FTIR microspectroscopy data and subsequent multivariate analysis (hierarchical cluster analysis (HCA) and principal component analysis (PCA)) was shown to unambiguously detect visually indistinguishable structural changes occurring in the hard dental tissue (dentin) depending on the method used for their pre-processing, and to classify and differentiate the identified features at the submicron level with high spatial resolution. The detectable spectral transformations indicate that the preparation of dental tissue with a dental laser leads to significant changes in the organic components of dentin, which may affect adhesion. The use of a diamond cylindrical drill with a turbine handpiece is characterized by a larger area (depth) of the altered hard tissue than in the case of a dental laser for dental cavity preparation. The observed redistribution of the phase composition of the inorganic component in the tissue is associated with the emergence of additional phases of weak calcium phosphates, and changes in the organic component with transformations in the secondary structure of proteins. Active use of the proposed integrated approach in the future will clarify the areas of its applicability to the analysis of biological tissues and pathologies in them, which will help in the clinical setting to choose the optimal personalized approach for patients.

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Unraveling the formation dynamics of metallic femtosecond laser induced periodic surface structures

Khorashad,

Reicks,

Erickson

et al. 2024

Optics & Laser Technology

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Modification of dental enamel, dentin by an ultra-fast femtosecond laser irradiation: A systematic review

Cited by 11 publications

References 62 publications

Optical penetration models for practical prediction of femtosecond laser ablation of dental hard tissue

Optical penetration models for practical prediction of femtosecond laser ablation of dental hard tissue

A Study of the Effects of Medical Dental Laser and Diamond Drill on Dentin Tissue during Dental Restoration Based on Spectral Imaging and Multivariate Analysis of Synchrotron FTIR Microspectroscopy Data

Unraveling the formation dynamics of metallic femtosecond laser induced periodic surface structures

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