Document Detail

Morphology of the dentin on primary molars after the application of phosphoric acid under different conditions.
MedLine Citation:
PMID:  20877970     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to evaluate changes in the superficial dentin pattern of primary teeth after applying different phosphoric acid concentrations and conditioning times. Twenty-four dentin surfaces were divided in 4 groups with 10 teeth each: GI -no treatment; GII to GIV -phosphoric acid at 37%, 32%, and 10% respectively. The samples were divided into two halves: one treated for 7 seconds (T1) and the other one for 15 seconds (T2). They were submitted to scanning electronic microscopy (SEM). A reticule was superimposed upon the images to randomly select dentinal tubules measured in µm². The conditioning times did not cause significant differences in the mean diameter values of the dentin tubules within each test group: GII (T1= 4.86; T2= 4.70); GIII (T1 = 3.83; T2= 3.08); GIV (T1= 5.04; T2= 5.23). Comparing different groups, there were no differences in T1. The same results were observed in T2, except for GIV which presented higher mean diameter values than GIII. The extent of acid conditioning did not influence tubule opening within groups. When different types of acids where compared, only the 10% phosphoric acid showed upper tubule opening than 32% phosphoric acid. The dentin pattern varied according to the type of acid used for conditioning.
Renata Antonini Pimenta; Cláudia Valéria de Sousa Resende Penido; Roberval de Almeida Cruz; José Bento Alves
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Brazilian oral research     Volume:  24     ISSN:  1807-3107     ISO Abbreviation:  Braz Oral Res     Publication Date:    2010 Jul-Sep
Date Detail:
Created Date:  2010-09-29     Completed Date:  2011-01-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101307187     Medline TA:  Braz Oral Res     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  323-8     Citation Subset:  D; IM    
Department of Dentistry, Pontifical Catholic University of Minas Gerais, Belo Horizonte, MG, Brazil.
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MeSH Terms
Acid Etching, Dental*
Analysis of Variance
Dentin / anatomy & histology,  drug effects*
Microscopy, Electron, Scanning
Molar / anatomy & histology,  drug effects*
Phosphoric Acids / administration & dosage,  pharmacology*
Smear Layer
Surface Properties / drug effects
Time Factors
Tooth, Deciduous / anatomy & histology,  drug effects*
Reg. No./Substance:
0/Phosphoric Acids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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