Structural and functional changes in root dentin following exposure to KTP/532 laser

Hossam M. Tewfik, David H. Pashley, Jack A. Horner, Mohamed M. Sharawy

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


The use of a new, modified Nd:YAG laser called the KTP/532 laser was evaluated within root canals to determine whether it would modify dentin permeability or alter the scanning electron microscopic appearance of canal dentin. Energies and exposure times were chosen which did not permit periodontal temperatures to increase above 5°C (1 W × 1 s-5 W × 0.5 s). Half of the root canals were covered with smear layer and half were treated with EDTA/NaOCl to remove the smear layer. The results showed that this laser did not change the permeability of the smear layer-covered dentin, although scanning electron microscopic examination revealed modifications to the surface of smear layer. Lasing of etched dentin produced modest increases in root permeability which were associated with enlargement and cracking of tubule orifices.

Original languageEnglish (US)
Pages (from-to)492-497
Number of pages6
JournalJournal of endodontics
Issue number10
StatePublished - Oct 1993
Externally publishedYes

ASJC Scopus subject areas

  • Dentistry(all)


Dive into the research topics of 'Structural and functional changes in root dentin following exposure to KTP/532 laser'. Together they form a unique fingerprint.

Cite this