摘要:

This report was derived from cross-sectional and longitudinal analyses of prevalence, pattern, and severity of incisai wear in 64 dental students who had virtually complete dentitions at the first examination and unchanged dentitions at the re-examination. They were first examined in 1991 and re-examined after 24 months in 1993. The average age of the students in 1991 was 23±1.7 years. Assessment of incisai wear was made on stone casts based on silicone impression material in accordance with the Incisai wear Index (IwI). The results showed that the prevalence of incisai wear had not changed during the observation period. The severity of incisai wear for maxillary and mandibular central and lateral incisors had remained essentially the same, whereas the severity of wear of maxillary and mandibular canines had increased during the observation period. There was no statistically significant relationship between age and IwI. The wear pattern found for anterior teeth is discussed in relation to the cuspid protection and the group function theories of occlusion.

ISSN:0001-6357    

DOI:10.3109/00016359509005996

出版商:Taylor&Francis    

年代:1995

数据来源: Taylor

摘要:

An instrument based on friction measurement has been developed to evaluate oral mucosal dryness objectively. The purpose of this study was to compare the friction instrument with instruments measuring in vitro rheologic properties. Measurements were performed against steel and irreversible hydrocolloid after application of different concentrations of aqueous solutions of carboxymethylcellulose and chitosan lactate. The results of the measurements were logical, with inversely proportional values for the friction instrument as compared with values obtained using the instrument measuring rheologic properties; that is, increased viscosity led to decreased friction values.

ISSN:0001-6357    

DOI:10.3109/00016359509005997

出版商:Taylor&Francis    

年代:1995

数据来源: Taylor