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A quantitative study of enamel acid etch patterns on surfaces used for retention of resin-bonded fixed prostheses

Lookup NU author(s): Dr Ross Hobson, Professor Mark Thomason, Dr Nick Jepson


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This study investigated the quality of in vivo etch patterns on the bonding surfaces of 46 abutment teeth following acid etching with 37% phosphoric acid for 30 seconds. Two-stage putty and light bodied addition cured silicone impressions of the etched lingual surfaces were used to form replicas that were then viewed using the scanning electron microscope. Over 69% of the lingual bonding surface area of incisors, canine and premolars were unetched, 16% barely etched, 7% etched and less than 2% ideally etched. There was no significant difference in the quality of etch between different tooth types. There was a significantly greater proportion of poorly etched enamel towards the cervical margin in comparison with the occlusal half. This may have implications in retention of resin bonded bridges.

Publication metadata

Author(s): Hobson RS, Crotty T, Thomason JM, Jepson NJ

Publication type: Article

Publication status: Published

Journal: European Journal of Prosthodontics and Restorative Dentistry

Year: 2005

Volume: 13

Issue: 3

Pages: 123-128

Print publication date: 01/09/2005

ISSN (print): 0965-7452

Publisher: FDI World Dental Press Ltd


Notes: 0965-7452 (Print) Journal Article