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Abo-ELsouood AK, Moharrum HS, Zaky AA, Hamdy O. Utilizing Laser-Induced Fluorescence to Evaluate the Efficiency of Carbon Dioxide and Diode Lasers in Dentin Sealing after Tooth Preparation: An in-vitro Study. J Fluoresc 2024:10.1007/s10895-024-03816-4. [PMID: 38985395 DOI: 10.1007/s10895-024-03816-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 06/24/2024] [Indexed: 07/11/2024]
Abstract
Adhesive dentistry has made it feasible to design restorations with high aesthetic qualities and little invasiveness. However, the freshly cut dentin after the tooth preparation needs to be sealed to prevent its contaminations, bacterial leakage, and hypersensitivity. Consequently, the immediate dentin sealing (IDS) method has been advised. This study examines different dentinal tubule sealing methods via CO2 laser, diode laser (980-nm) and a two-step self-etch adhesive system applied directly to the fresh cut dentin preceding the placement of the provisional phase. The sealing efficiency of each laser and bond system was evaluated based on the laser-induced fluorescence (LIF) properties and image analysis by scanning electron microscopy. Moreover, the obtained LIF spectra were evaluated using partial least square progression. A two-step adhesive containing a high concentration of S-PRG fillers produced a thick layer that was not perfectly uniform at all sites due to uneven filler distribution in the bond with totally and partially closed dentinal tubules. However, the peaks of the LIF spectra dropped after applying laser because of its sealing effectiveness. Accordingly, CO2 and diode lasers have strong evidence in dentinal tubule sealing and a definitive treatment modality for dentinal hypersensitivity. Moreover, IDS with an adhesive system is superior in occluding dentinal tubules in a biomimetic manner based on its filler content and bioactive properties.
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Affiliation(s)
- Asmaa K Abo-ELsouood
- Department of Medical Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, 12613, Egypt
| | - Haythem S Moharrum
- Department of Medical Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, 12613, Egypt
| | - Ahmed Abbas Zaky
- Department of Medical Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, 12613, Egypt
| | - Omnia Hamdy
- Department of Medical Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, 12613, Egypt.
- Department of Engineering Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, 12613, Egypt.
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Lashkari SM, Kariminezhad H, Amani H, Mataji P, Rahimnejad M. Introduction of 5-aminolevulinic acid as a theranostics agent in dentistry. Photodiagnosis Photodyn Ther 2019; 25:336-343. [DOI: 10.1016/j.pdpdt.2019.01.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 11/05/2018] [Accepted: 01/16/2019] [Indexed: 10/27/2022]
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3
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de Menezes RF, Harvey CM, de Martínez Gerbi MEM, Smith ZJ, Smith D, Ivaldi JC, Phillips A, Chan JW, Wachsmann-Hogiu S. Fs-laser ablation of teeth is temperature limited and provides information about the ablated components. JOURNAL OF BIOPHOTONICS 2017; 10:1292-1304. [PMID: 28544745 DOI: 10.1002/jbio.201700042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/12/2017] [Accepted: 04/18/2017] [Indexed: 06/07/2023]
Abstract
The goal of this work is to investigate the thermal effects of femtosecond laser (fs-laser) ablation for the removal of carious dental tissue. Additional studies identify different tooth tissues through femtosecond laser induced breakdown spectroscopy (fsLIBS) for the development of a feedback loop that could be utilized during ablation in a clinical setting. Scanning Election Microscope (SEM) images reveal that minimal morphological damages are incurred at repetition rates below the carbonization threshold of each tooth tissue. Thermal studies measure the temperature distribution and temperature decay during laser ablation and after laser cessation, and demonstrate that repetition rates at or below 10kHz with a laser fluence of 40 J/cm2 would inflict minimal thermal damage on the surrounding nerve tissues and provide acceptable clinical removal rates. Spectral analysis of the different tooth tissues is also conducted and differences between the visible wavelength fsLIBS spectra are evident, though more robust classification studies are needed for clinical translation. These results have initiated a set of precautionary recommendations that would enable the clinician to utilize femtosecond laser ablation for the removal of carious lesions while ensuring that the solidity and utility of the tooth remain intact.
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Affiliation(s)
- Rebeca Ferraz de Menezes
- Department of Endodontics/Restorative Dentistry, University of Pernambuco (UPE), 1650 Gal Newton Cavalcanti Avenue, Camaragibe, PE, 54753-020, Brazil
- Center for Biophotonics, University of California-Davis, 2700 Stockton Blvd, Sacramento, CA, 95817, USA
- Laser Center, University of Pernambuco (UPE), 1650 Gal Newton Cavalcanti Avenue, Camaragibe, PE, 54753-020, Brazil
| | - Catherine Malinda Harvey
- Center for Biophotonics, University of California-Davis, 2700 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Marleny Elizabeth Márquez de Martínez Gerbi
- Department of Endodontics/Restorative Dentistry, University of Pernambuco (UPE), 1650 Gal Newton Cavalcanti Avenue, Camaragibe, PE, 54753-020, Brazil
- Laser Center, University of Pernambuco (UPE), 1650 Gal Newton Cavalcanti Avenue, Camaragibe, PE, 54753-020, Brazil
| | - Zachary J Smith
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, 443 Huangshan Road, Hefei, Anhui, China
| | - Dan Smith
- Nikon Research Corporation of America, 12490 N. Rancho Vistoso Blvd., Suite130, Oro Valley, AZ, 85755-1880, USA
| | - Juan C Ivaldi
- Nikon Research Corporation of America, 1399 Shoreway Road, Belmont, CA, 94002-4107, USA
| | - Alton Phillips
- Nikon Research Corporation of America, 12490 N. Rancho Vistoso Blvd., Suite130, Oro Valley, AZ, 85755-1880, USA
| | - James W Chan
- Center for Biophotonics, University of California-Davis, 2700 Stockton Blvd, Sacramento, CA, 95817, USA
- Department of Pathology and Laboratory Medicine, University of California-Davis, 2700 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Sebastian Wachsmann-Hogiu
- Center for Biophotonics, University of California-Davis, 2700 Stockton Blvd, Sacramento, CA, 95817, USA
- Department of Pathology and Laboratory Medicine, University of California-Davis, 2700 Stockton Blvd, Sacramento, CA, 95817, USA
- Intellectual Ventures Laboratory/Global Good, 14360 SE Eastgate Way, Bellevue, WA, 98007, USA
- Department of Bioengineering, McGill University, 817 Sherbrooke Street West, Montreal, Quebec, H3 A0C3, Canada
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Singh S, Fält P, Barman I, Koistinen A, Dasari RR, Kullaa A. Objective identification of dental abnormalities with multispectral fluorescence imaging. JOURNAL OF BIOPHOTONICS 2017; 10:1279-1286. [PMID: 27943658 PMCID: PMC5468489 DOI: 10.1002/jbio.201600218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 10/14/2016] [Accepted: 11/18/2016] [Indexed: 06/06/2023]
Abstract
Sensitive methods that can enable early detection of dental diseases (caries and calculus) are desirable in clinical practice. Optical spectroscopic approaches have emerged as promising alternatives owing to their wealth of molecular information and lack of sample preparation requirements. In the present study, using multispectral fluorescence imaging, we have demonstrated that dental caries and calculus can be objectively identified on extracted tooth. Spectral differences among control, carious and calculus conditions were attributed to the porphyrin pigment content, which is a byproduct of bacterial metabolism. Spectral maps generated using different porphyrin bands offer important clues to the spread of bacterial infection. Statistically significant differences utilizing fluorescence intensity ratios were observed among three groups. In contrast to laser induced fluorescence, these methods can provide information about exact spread of the infection and may aid in long term dental monitoring. Successful adoption of this approach for routine clinical usage can assist dentists in implementing timely remedial measures.
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Affiliation(s)
- S.P. Singh
- Institute of Dentistry, Faculty of Health Sciences, Kuopio
- SIB Labs, University of Eastern Finland, Kuopio
- Laser Biomedical Research Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - P. Fält
- SIB Labs, University of Eastern Finland, Kuopio
| | - Ishan Barman
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | | | - Ramachandra Rao Dasari
- Laser Biomedical Research Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - A.M. Kullaa
- Institute of Dentistry, Faculty of Health Sciences, Kuopio
- Dental Education Clinic, Kuopio, University Hospital, Kuopio, Finland
- Research Unit of Oral Health Sciences, Faculty of Medicine, University of Oulu and Medical Research Center, Oulu University Hospital, Oulu, Finland
- Department of Oral and Maxillofacial Surgey, Institute of Dentistry, University of Turku, Turku, Finland
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Gazmeh M, Bahreini M, Tavassoli SH. Discrimination of healthy and carious teeth using laser-induced breakdown spectroscopy and partial least square discriminant analysis. APPLIED OPTICS 2015; 54:123-131. [PMID: 25967014 DOI: 10.1364/ao.54.000123] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/10/2014] [Indexed: 06/04/2023]
Abstract
In the laser drilling of teeth, a microplasma is generated which may be utilized for elemental analysis of ablated tissue via a laser-induced breakdown spectroscopy (LIBS) technique. In this study, LIBS is used to investigate the possibility of discrimination of healthy and carious tooth tissues. This possibility is examined using multivariate statistical analysis called partial least square discriminant analysis (PLS-DA) based on atomic and ionic emission lines of teeth LIBS spectra belonging to P, Ca, Mg, Zn, K, Sr, C, Na, H, and O elements. Results show an excellent discrimination and prediction of unknown tooth tissues. It is shown that using the PLS-DA method, the spectroscopic analysis of plasma emission during the laser drilling, would be a promising technique for caries detection.
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Singh VK, Rai AK. Potential of laser-induced breakdown spectroscopy for the rapid identification of carious teeth. Lasers Med Sci 2010; 26:307-15. [DOI: 10.1007/s10103-010-0786-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Indexed: 12/01/2022]
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Thomas SS, Jayanthi JL, Subhash N, Thomas J, Mallia RJ, Aparna GN. Characterization of dental caries by LIF spectroscopy with 404-nm excitation. Lasers Med Sci 2010; 26:299-305. [DOI: 10.1007/s10103-010-0771-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Indexed: 10/19/2022]
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Bartolić A, Santić M, Ribaric S. Automated tremor amplitude and frequency determination from power spectra. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2009; 94:77-87. [PMID: 19081159 DOI: 10.1016/j.cmpb.2008.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2007] [Revised: 08/08/2008] [Accepted: 10/13/2008] [Indexed: 05/27/2023]
Abstract
Analysis of tremor amplitude and frequency is often done in frequency domain from tremor power spectra. Several methods for tremor amplitude estimation from power spectra were described but have not been systematically compared and evaluated. In addition, current methods for tremor amplitude estimation from power spectra do not correct tremor amplitude when power spectra of adjacent peaks overlap and this could contribute to an overestimation of tremor amplitude. We developed a computer application for automated analysis of tremor power spectra that corrects tremor amplitude, when power spectra of adjacent peaks overlap, with a Gauss curve fitting method. The accuracy of previously described methods and new methods for tremor amplitude estimation from power spectra was evaluated by 78 simulated power spectra and 900 tremor power spectra records of 25 patients with Parkinson's disease. Thus the influence of peak amplitude, number of peaks and degree of peak overlapping on tremor amplitude estimation could be systematically evaluated and compared. We conclude that the Gauss curve fitting method (Gauss 1) enables a more accurate estimation of tremor amplitude than previously described methods.
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Affiliation(s)
- Andrej Bartolić
- Institute of Pathophysiology, Medical Faculty, Zaloska 4, SI-1000 Ljubljana, Slovenia
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Thareja RK, Sharma AK, Shukla S. Spectroscopic investigations of carious tooth decay. Med Eng Phys 2008; 30:1143-8. [PMID: 18396438 DOI: 10.1016/j.medengphy.2008.02.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 02/14/2008] [Accepted: 02/19/2008] [Indexed: 11/26/2022]
Abstract
We report on the elemental composition of healthy and infected part of human tooth using laser induced breakdown spectroscopy (LIBS). We have used prominent constituent transitions in laser-excited tooth to diagnose the state of the tooth. A nanosecond laser pulse (355nm, 5ns) was used as an ablating pulse and the sodium (3s2S-3p2P) at 588.99 and (3s2S-3p2P) at 589.99nm, strontium (5s21S-1s5P) at 460.55nm, and calcium (3d3D-4f 3F0) at 452.55nm transitions for spectroscopic analysis. The spectroscopic observations in conjunction with discriminate analysis showed that calcium attached to the hydroxyapatite structure of the tooth was affected severely at the infected part of the tooth. The position-time plots generated from two-dimensional (2D) images conclusively showed a decrease in calcium concentration in the infected region of the irradiated tooth. Using the technique, we could distinguish between the healthy and carious parts of the tooth with significant accuracy.
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Affiliation(s)
- R K Thareja
- Department of Physics and Centre for Laser Technology, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India.
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Thomas SS, Mallia RJ, Jose M, Subhash N. Investigation of in vitro dental erosion by optical techniques. Lasers Med Sci 2007; 23:319-29. [PMID: 17786500 DOI: 10.1007/s10103-007-0489-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2007] [Accepted: 07/30/2007] [Indexed: 10/22/2022]
Abstract
Nitrogen laser-induced fluorescence (LIF) and tungsten halogen lamp excited diffuse reflectance spectra were recorded in 350- to 700-nm range on a miniature fiber-optic spectrometer from in vitro premolar tooth during various stages of artificial erosion with 36% phosphoric acid. Both the LIF spectral intensity and the diffuse reflectance intensity gradually increased during tooth erosion. The LIF spectra were analyzed by curve fitting using Gaussian spectral functions to determine the true contribution of different bands in the spectra during erosion. Thus, the broad bands at 440 and 490 nm in the LIF spectra of sound enamel were resolved into four peaks centered at 409.1, 438.1, 492.4 and 523.1 nm and of sound dentin into peaks at 412.0, 440.1, 487.8 and 523.4 nm. The F410/F525 ratios derived from curve-fitted Gaussian peak amplitudes and curve areas were found to be more sensitive to erosion as compared to the diffuse reflectance ratio R500/R700 or the raw LIF spectral ratio F440/F490.
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Affiliation(s)
- Shiny S Thomas
- Biophotonics Laboratory, Centre for Earth Science Studies, Akkulam, Trivandrum 695031, India
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Qin YL, Luan XL, Bi LJ, Lü Z, Sheng YQ, Somesfalean G, Zhou CN, Zhang ZG. Real-time detection of dental calculus by blue-LED-induced fluorescence spectroscopy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2007; 87:88-94. [PMID: 17433705 DOI: 10.1016/j.jphotobiol.2007.03.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2007] [Revised: 03/01/2007] [Accepted: 03/02/2007] [Indexed: 11/20/2022]
Abstract
Successful periodontal therapy requires sensitive techniques to discriminate dental calculus from healthy teeth. The aim of the present study was to develop a fluorescence-based procedure to enable real-time detection and quantification of dental calculus. Thirty human teeth--15 teeth with sub- and supragingival calculus and 15 healthy teeth--covered with a layer of physiological saline solution or blood were illuminated by a focused blue LED light source of 405 nm. Autofluorescence spectra recorded along a randomly selected line stretching over the crown-neck-root area of each tooth were utilized to evaluate a so called calculus parameter R, which was selected to define a relationship between the integrated intensities specific for healthy teeth and for calculus in the 477-497 nm (S(A)) and 628-685 nm (S(B)) wavelength regions, respectively. Statistical analysis was performed and a cut-off threshold of R=0.2 was found to distinguish dental calculus from healthy teeth with 100% sensitivity and specificity under various experimental conditions. The results of the spectral evaluation were confirmed by clinical and histological findings. Automated real-time detection and diagnostics for clinical use were implemented by a corresponding software program written in Visual Basic language. The method enables cost-effective and reliable calculus detection, and can be further developed for imaging applications.
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Affiliation(s)
- Y L Qin
- Department of Physics, Harbin Institute of Technology, Science and Technology Park, Harbin, People's Republic of China
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Laser Literature Watch. Photomed Laser Surg 2006; 24:222-48. [PMID: 16706704 DOI: 10.1089/pho.2006.24.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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