Optical Properties of Direct Restorative Materials

The contrast ratio, light reflectivity, scattering coefficient, and absorption coefficient of four composites and an unfilled resin were calculated algebraically from reflection spectrophotometric data using Kubelka's equations. The correlation coefficient between calculated and experimental values of contrast ratio was 0.9996. Values of infinite optical thickness ranged from 4.19 to 6.70 mm.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68196/2/10.1177_00220345810600050601.pd

Materials Science

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67251/2/10.1177_00220345830620051601.pd

Effects of Composite Restorations on the Periodontal Membrane in Monkeys

We evaluated the histopathological response of the periodontal membrane to intentionolly-replanted teeth carrying composite (experimental) and silver amalgam (control) restorations in the middle third of each root. The study revealed that the amalgam produced, in the periodontal tissues, an initial localized inflammation that subsided with the subsequent formation of a fibrous capsule. However, the periodontal membrane adjacent to the composite resin restorations demonstrated chronic inflammation. It was concluded that the composite evoked chronic inflammatory responses of the periodontal tissues in monkeys.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67994/2/10.1177_00220345830620011801.pd

Aging Characteristics of Elastic Duplicating Compounds

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67709/2/10.1177_00220345620410011401.pd

Physical Properties of Some Zinc Oxide-Eugenol Cements

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67707/2/10.1177_00220345660450022801.pd