National Academy Science Letters

, Volume 42, Issue 1, pp 87–90 | Cite as

Laser-Induced Breakdown Spectroscopy Coupled with PCA Study of Human Tooth

  • A. K. PathakEmail author
  • Ankita Singh
  • Rohit Kumar
  • A. K. RaiEmail author
Short Communication


The present study focuses on the laser-induced breakdown spectroscopy (LIBS) studies on different parts of tooth samples. The hardness of different parts of tooth samples belonging to different age groups has been studied using ionic-to-atomic intensity ratio of Ca spectral line. From this ratio, we infer that enamel is the hardest part of teeth. The principal component analysis (PCA) on LIBS data of different parts of teeth gives PC1 (96%) and PC2 (4%), which explains maximum variance present in data set. Therefore, this work demonstrates the suitability of LIBS along with PCA for routine in vitro/in vivo dental practices.


LIBS Human tooth Enamel Dentin Cementum PCA 



First author acknowledges financial assistance from the University Grants Commission (UGC), New Delhi (F.No.8-4(57)/2015(MRP/NRCB)).


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Copyright information

© The National Academy of Sciences, India 2018

Authors and Affiliations

  1. 1.Department of PhysicsEwing Christian CollegeAllahabadIndia
  2. 2.Institute of Medical SciencesBanaras Hindu UniversityVaranasiIndia
  3. 3.Department of PhysicsChaudhary Mahadeo Prasad Degree College, University of AllahabadAllahabadIndia

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