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A comparison was made between the effects of 15 and 60 seconds of etching with a 37 percent phosphoric acid solution on enamel surfaces from deciduous and young and old permanent teeth. Resin impressions of fifteen pairs of enamel surfaces from each group of teeth were studied in the scanning electron microscope. The results were based on in-pair evaluations. A scale from 0 to 3 was used to evaluate the degree of surface irregularity. For deciduous teeth, no difference was found in effect between the etching periods studied. For young permanent teeth, 15 seconds of etching created more retentive conditions than 60 seconds. For old permanent teeth, the reverse was found. The most retentive conditions were found for the deciduous teeth, regardless of etching time.
K J Nordenvall, and
M Brännström, and
O Malmgren
March 1997,
Journal of the Indian Society of Pedodontics and Preventive Dentistry,
K J Nordenvall, and
M Brännström, and
O Malmgren
October 1977,
Journal of dental research,
K J Nordenvall, and
M Brännström, and
O Malmgren
July 2021,
Connective tissue research,
K J Nordenvall, and
M Brännström, and
O Malmgren
March 1990,
Kokubyo Gakkai zasshi. The Journal of the Stomatological Society, Japan,
K J Nordenvall, and
M Brännström, and
O Malmgren
August 1999,
Okajimas folia anatomica Japonica,
K J Nordenvall, and
M Brännström, and
O Malmgren
January 1969,
Bulletin du Groupement international pour la recherche scientifique en stomatologie,
K J Nordenvall, and
M Brännström, and
O Malmgren
August 1968,
The Dental practitioner and dental record,
K J Nordenvall, and
M Brännström, and
O Malmgren
June 1953,
Fogorvosi szemle,
K J Nordenvall, and
M Brännström, and
O Malmgren
February 1950,
The New York state dental journal,
K J Nordenvall, and
M Brännström, and
O Malmgren
January 1970,
Revista gaucha de odontologia,
