Protocol for determining Apparent Young's Modulus of human teeth using laser speckle interferometry

Rosario Salvador-Palmer; Rolando J. González-Peña; René A. Martínez-Celorio; Francisco J. López; Vanessa Paredes; Rosa Cibrián

doi:10.1117/12.977861

11 September 2012 Protocol for determining Apparent Young's Modulus of human teeth using laser speckle interferometry

Rosario Salvador-Palmer, Rolando J. González-Peña, René A. Martínez-Celorio, Francisco J. López, Vanessa Paredes, Rosa Cibrián

Author Affiliations +

Proceedings Volume 8413, Speckle 2012: V International Conference on Speckle Metrology; 84131K (2012) https://doi.org/10.1117/12.977861
Event: SPECKLE 2012: V International Conference on Speckle Metrology, 2012, Vigo, Spain

Abstract

Digital Speckle Shearing Pattern Interferometry (DSSPI) allows to directly quantify deformations in teeth that are subjected to stress. Eighteen second premolars (2PM) were studied both before and after endodontic treatment made with the ProTaper method in order to evaluate the variation of dental elasticity. We present a protocol for determination tooth Apparent Young's Modulus (AYM). Each tooth underwent different flexion loads from 50 to 300 g. DSSPI technique, makes it possible to show the deformation at each point of a line, selected by the researcher, that goes from the attachment point (Point 0) to the root area where the load is applied (Point 300-350, depending on the tooth size). The deformation of each tooth was characterized by the deformation value of point 150, located around the mid-area of tooth. This value was obtained from a linear regression applied on the deformation values of all the points in the fitted line. The correlation coefficients of these fitted regression lines were always higher than 0.972. The elasticity constant of each tooth was obtained as the slope of a new regression line, corresponding to the different loads applied on the tooth versus the corresponding deformation at point 150. This value, divided by the length of the tooth, is the apparent Young's modulus (AYM), which is expressed in arbitrary units (a.u.). Values of the AYM before (4.16 10⁴ a.u) and after endodontic treatment using the ProTaper method (4.30 10⁴ a.u.) showed no statistically significant difference in the elasticity of teeth (p>0.7).

Citation Download Citation

Rosario Salvador-Palmer, Rolando J. González-Peña, René A. Martínez-Celorio, Francisco J. López, Vanessa Paredes, and Rosa Cibrián "Protocol for determining Apparent Young's Modulus of human teeth using laser speckle interferometry", Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 84131K (11 September 2012); https://doi.org/10.1117/12.977861

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
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Teeth

Interferometry

Speckle

Speckle interferometry

Speckle pattern

Statistical analysis

Mirrors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years