PMID: 11314147Apr 21, 2001Paper

An in vitro study of microleakage of occlusal composite restorations polymerized by a conventional curing light and a PAC curing light

The Journal of Clinical Pediatric Dentistry
J Stritikus, B Owens

Abstract

With the increase in usage of bonded dentistry procedures, so comes the development of advanced technology to polymerize it. The purpose of this in vitro study was to evaluate the microleakage of sealants and resin restorations utilizing two different curing lights. The conventional Ortholux curing light (OCL) and the Plasma Arc Curing (PAC) light attached to the KCP air abrasion unit of American Dental Technologies were utilized to polymerize sealants and resin restorations on extracted third molars and premolars. Forty-eight caries-free teeth were divided into 4 groups of 12 specimens. Occlusal sealants were polymerized on groups 1 and 3. Class I composite resin restorations were polymerized on groups 2 and 4. The PAC light polymerized group 2 and the OCL was used for groups 3 and 4. Therefore a comparison between the two light sources' polymerization could be measured by evaluating the microleakage of the two sets of specimens. The PAC light polymerized the Z100 adhesive for 5 seconds and the OCL polymerized it for 10 seconds. The Z100 A-1 composite placed in two 1 mm increments was polymerized with the PAC light for 10 seconds and the OCL for 40 seconds. The teeth were thermocycled 200 times between 5 degrees C and 55 degre...Continue Reading

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