Physical model approach to the design of laser irradiation regimens to improve resistance to dental caries

Jeffrey L. Fox; Jer Hsu; William I. Higuchi; G. Lynn Powell; M. Otsuka

doi:10.1117/12.238757

23 April 1996 Physical model approach to the design of laser irradiation regimens to improve resistance to dental caries

Jeffrey L. Fox, Jer Hsu, William I. Higuchi, G. Lynn Powell, M. Otsuka

Author Affiliations +

Proceedings Volume 2672, Lasers in Dentistry II; (1996) https://doi.org/10.1117/12.238757
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

A set of interrelated physical models has been developed for use in the rational design of laser irradiation regimens for improving the resistance of tooth enamel to dental caries. Taken together, these models describe (1) the formation of subsurface lesions in dental enamel; (2) the dependence of this lesion formation on micro-environmental solution chemistry variables such as pH and concentrations of calcium, phosphate and fluoride; (3) the dependence of this lesion formation on the metastable equilibrium solubility; (4) the alteration of the MES of enamel by exposure to elevated temperatures and (5) the time-temperature profiles achieved by laser irradiation of enamel. Appropriate laboratory procedures have been developed and carried out to determine the values of the relevant parameters of each of the above models. Key findings are: (1) the onset of dissolution is controlled by the micro-environmental solution ion activity product (IAP) for fluorapatite; (2) the value of this threshold IAP can be shifted significantly by laser irradiation; (3) this IAP shift corresponds to a lowering of the threshold pH for onset of demineralization by about 0.7 pH units; and (4) the set of models listed above can be used together in an integrated approach for the rational design of laser irradiation regimens for improving resistance to dental caries.

Citation Download Citation

Jeffrey L. Fox, Jer Hsu, William I. Higuchi, G. Lynn Powell, and M. Otsuka "Physical model approach to the design of laser irradiation regimens to improve resistance to dental caries", Proc. SPIE 2672, Lasers in Dentistry II, (23 April 1996); https://doi.org/10.1117/12.238757

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Ions

Laser irradiation

Crystals

Dental caries

Resistance

Apatite

Carbonates

Show All Keywords

Keywords/Phrases

Search In:

Publication Years