PMID- 21488734
OWN - NLM
STAT- MEDLINE
DCOM- 20110523
LR  - 20220330
IS  - 0361-7734 (Print)
IS  - 0361-7734 (Linking)
VI  - 36
IP  - 1
DP  - 2011 Jan-Feb
TI  - Effect of tubular orientation on the dentin bond strength of acidic self-etch 
      adhesives.
PG  - 86-91
LID - 10.2341/10-233-LR [doi]
AB  - OBJECTIVE: To determine the effect of varying the adhesive pH on the bond 
      strength of an experimental self-etch adhesive system (BISCO, Inc) to dentin with 
      the bonding surface perpendicular (occlusal direction) or parallel (axial 
      direction) to dentin tubules. METHODS: An experimental self-etch adhesive was 
      modified by adding base to increase the pH from 1.1 to 2.7. Shear bond strength 
      (SBS) was measured using an Ultradent jig method with Aelite All-Purpose Body 
      light-cured composite (BISCO, Inc). Human dentin was prepared by exposing the 
      axial and occlusal surface. The self-etch adhesive was applied according to the 
      manufacturer's instructions and cured for 10 seconds@ 500mW using a VIP (BISCO, 
      Inc) halogen curing light. Scanning electron microscope (SEM) examination was 
      used to view both the occlusal- and axial-oriented dentin surfaces that were 
      etched using pH (1.2~3.0) adjusted phosphoric acid solutions. All bond strength 
      data analysis was performed using ANOVA, followed by a Student-Newman-Keuls 
      multiple range test. RESULTS: When the dentin-bonding surface was parallel to the 
      tubule orientation (axial), the bond strength was independent of the pH of the 
      self-etch adhesive (p>0.05). When the bonded surface was perpendicular to the 
      tubule orientation (occlusal), the bond strength numbers were decreased as the pH 
      decreased; the decrease became statistically significant when the pH was lower 
      than 1.8. With a pH higher than 2.3, the bond strength had no difference (p>0.05) 
      between the occlusal and axial positions. When the pH was lower than 1.8, SEM 
      pictures confirmed that the smear layers and smear plugs were completely 
      solubilized by the phosphoric acid solution. Higher pH values (2.0-2.8) showed 
      smear layers partially solubilized and pH values of 3.0 fully retained the smear 
      layer.
FAU - Schiltz-Taing, M
AU  - Schiltz-Taing M
AD  - Department of Research and Development, BISCO Inc, Schaumburg, IL, USA.
FAU - Wang, Y
AU  - Wang Y
FAU - Suh, B
AU  - Suh B
FAU - Brown, D
AU  - Brown D
FAU - Chen, L
AU  - Chen L
LA  - eng
PT  - Journal Article
DEP - 20110221
PL  - United States
TA  - Oper Dent
JT  - Operative dentistry
JID - 7605679
RN  - 0 (Dentin-Bonding Agents)
RN  - 0 (Phosphoric Acids)
RN  - 0 (Resin Cements)
MH  - Acid Etching, Dental/*methods
MH  - Analysis of Variance
MH  - *Dental Bonding
MH  - Dental Stress Analysis
MH  - Dentin/*ultrastructure
MH  - Dentin Permeability
MH  - Dentin-Bonding Agents/*chemistry
MH  - Humans
MH  - Hydrogen-Ion Concentration
MH  - Phosphoric Acids
MH  - Resin Cements/*chemistry
MH  - Shear Strength
MH  - Smear Layer
MH  - Statistics, Nonparametric
EDAT- 2011/04/15 06:00
MHDA- 2011/05/24 06:00
CRDT- 2011/04/15 06:00
PHST- 2011/04/15 06:00 [entrez]
PHST- 2011/04/15 06:00 [pubmed]
PHST- 2011/05/24 06:00 [medline]
AID - 10.2341/10-233-LR [doi]
PST - ppublish
SO  - Oper Dent. 2011 Jan-Feb;36(1):86-91. doi: 10.2341/10-233-LR. Epub 2011 Feb 21.