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Bonding characteristics of impacted versus erupted permanent teeth.

Authors
  • Jacobs, G
  • Kuftinec, M M
  • Showfety, K J
  • von Fraunhofer, J A
Type
Published Article
Journal
American journal of orthodontics
Publication Date
Mar 01, 1986
Volume
89
Issue
3
Pages
242–245
Identifiers
PMID: 3513597
Source
Medline
License
Unknown

Abstract

Erupted and impacted teeth from young (12 to 24 years of age) and older persons (over 50 years of age) were bonded by a standard technique using etching times of 0, 15, 30, and 60 seconds. Two subgroups of teeth were soaked for 7 days and compared with those in the remainder of the group. Test specimens were loaded in shear to bond failure by means of a testing machine with a 200- kg load cell and a crosshead speed of 5 mm/minute. Results indicated insignificant bond-strength differences between young-impacted and young-erupted teeth for any given etching time. Very small bond-strength differences were found for various etching times (15, 30, and 60 seconds). A significant difference was found between 24-hour soak and 7-day soak for the etching times of 30 and 60 seconds only.

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