PMID- 2691170
OWN - NLM
STAT- MEDLINE
DCOM- 19900216
LR  - 20041117
IS  - 0163-9633 (Print)
IS  - 0163-9633 (Linking)
VI  - 11
IP  - 3
DP  - 1989 May-Jun
TI  - Scanning microscopy of resin infiltration patterns in acid-etched incisor enamel.
PG  - 3-5
AB  - Previous studies have described the surface morphologic characteristics of 
      acid-etched enamel. The purpose of this investigation was to examine the patterns 
      of resin infiltration into the etched enamel. Fourteen, human, incisor teeth, 
      extracted because of advanced periodontal disease, were etched on the labial 
      surfaces for 60 seconds with 37% phosphoric acid, washed in tap water, and then 
      air-dried. A self-cured enamel resin was applied to the etched labial surface and 
      supported with epoxy. The teeth were dissolved in formic acid. The resin remnants 
      were cleaned in water, dried, mounted on specimen stubs, coated with sputtered 
      gold, and examined in a Scanning electron microscope (SEM). Resin infiltration 
      patterns were photographed in the SEM at a magnification of 400 in 0.125-mm2 
      areas of the incisal, middle, and gingival thirds of each labial surface. Resin 
      infiltration patterns were scored according to the correspondence with the 
      rod-core, rod-periphery, and irregular acid-etch patterns seen in enamel. The 
      distribution of resin infiltration patterns was as follows: rod-core, 9.7%; 
      rod-periphery, 40.5%; and irregular, 49.7%. The values were averaged over all the 
      surface areas. Infiltration patterns into the etched enamel exhibited deep 
      interperikymata resin penetration. Subsurface channeling of resin was responsible 
      for the pattern seen in irregular etch and was the most common form of 
      infiltration in the gingival region. Subsurface channeling may be related to the 
      development of micropores observed in incipient carious lesions. Deep monomer 
      penetration and channeling may be important factors in mechanical attachment.
FAU - Clarke-Martin, J A
AU  - Clarke-Martin JA
FAU - Brady, J M
AU  - Brady JM
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Clin Prev Dent
JT  - Clinical preventive dentistry
JID - 8004895
RN  - 0 (Resins, Synthetic)
MH  - *Acid Etching, Dental
MH  - *Dental Bonding
MH  - Dental Enamel/*ultrastructure
MH  - Humans
MH  - Incisor
MH  - *Resins, Synthetic
EDAT- 1989/05/01 00:00
MHDA- 1989/05/01 00:01
CRDT- 1989/05/01 00:00
PHST- 1989/05/01 00:00 [pubmed]
PHST- 1989/05/01 00:01 [medline]
PHST- 1989/05/01 00:00 [entrez]
PST - ppublish
SO  - Clin Prev Dent. 1989 May-Jun;11(3):3-5.