Gary Jacobs D.D.S. , Mladen M. Kuftinec D.M.D., Sc.D. , Kevin J. Showfety D.D.S., M.S. , J.A. von Fraunhofer M.Sc., Ph.D.
{"title":"Bonding characteristics of impacted versus erupted permanent teeth","authors":"Gary Jacobs D.D.S. , Mladen M. Kuftinec D.M.D., Sc.D. , Kevin J. Showfety D.D.S., M.S. , J.A. von Fraunhofer M.Sc., Ph.D.","doi":"10.1016/0002-9416(86)90039-4","DOIUrl":null,"url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":75476,"journal":{"name":"American journal of orthodontics","volume":"89 3","pages":"Pages 242-245"},"PeriodicalIF":0.0000,"publicationDate":"1986-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0002-9416(86)90039-4","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American journal of orthodontics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0002941686900394","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
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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