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Journal of clinical and diagnostic research : JCDR

J.Clin.Diagn.Res.

May

10

5

ZC01

5

LR: 20160722; JID: 101488993; OID: NLM: PMC4948513; OTO: NOTNLM; 2016/02/23 [received]; 2016/03/16 [accepted]; 2016/05/01 [epublish]; ppublish

India

2249-782X; 0973-709X

PMID: 27437337

eng

Journal Article

10.7860/JCDR/2016/19739.7705 [doi]

Unknown(0)

27437337

INTRODUCTION: Etching of enamel and dentin surfaces increases the surface area of the substrate for better bonding of the tooth colored restorative materials. Acid etching is the most commonly used method. Recently, hard tissue lasers have been used for this purpose. AIM: The aim of the present study was to evaluate and compare the etching pattern of Er,Cr:YSGG and conventional etching on extracted human enamel and dentin specimens. MATERIALS AND METHODS: Total 40 extracted non-diseased teeth were selected, 20 anterior and 20 posterior teeth each for enamel and dentin specimens respectively. The sectioned samples were polished by 400 grit Silicon Carbide (SiC) paper to a thickness of 1.0 +/- 0.5 mm. The enamel and dentin specimens were grouped as: GrE1 & GrD1 as control specimens, GrE2 & GrD2 were acid etched and GrE3 & GrD3 were lased. Acid etching was done using Conditioner 36 (37 % phosphoric acid) according to manufacturer instructions. Laser etching was done using Er,Cr:YSGG (Erbium, Chromium : Ytrium Scandium Gallium Garnet) at power settings of 3W, air 70% and water 20%. After surface treatment with assigned agents the specimens were analyzed under ESEM (Environmental Scanning Electron Microscope) at X1000 and X5000 magnification. RESULTS: Chi Square and Student "t" statistical analysis was used to compare smear layer removal and etching patterns between GrE2-GrE3. GrD2 and GrD3 were compared for smear layer removal and diameter of dentinal tubule opening using the same statistical analysis. Chi-square test for removal of smear layer in any of the treated surfaces i.e., GrE2-E3 and GrD2-D3 did not differ significantly (p>0.05). While GrE2 showed predominantly type I etching pattern (Chi-square=2.78, 0.050.10) and GrE3 showed type III etching (Chi-square=4.50, p

Issar,R., Mazumdar,D., Ranjan,S., Krishna,N.K., Kole,R., Singh,P., Lakiang,D., Jayam,C.

Reader, Department of Conservative Dentistry & Endodontics, Buddha Institute of Dental Sciences and Hospital , Patna, Bihar, India .; Professor, Department of Conservative Dentistry & Endodontics, R. Ahmed Dental College and Hospital , Kolkata, West Benga

20160501

PMC4948513

http://vp9py7xf3h.search.serialssolutions.com/?charset=utf-8&pmid=27437337

2016