Search PubMed⌕ Search

Biomedical subjects

G Henyon

Publications and source records attributed to G Henyon.

4 recordsLinked to original sources
PubMed1993

Development and verification of the proximal/marginal plaque index.

The purpose of this study was to compare the ability of experienced and newly trained investigators to use the published Global Plaque Index and a newly developed Proximal/Marginal Index (PMI) that focuses on disclosed plaque at clearly defined proximal and marginal surfaces. Four independent clinical studies were performed, two with each index, on 11 subjects per study. In each study, examinations were conducted before and after brushing, to determine inter- and intra-examiner comparisons over a range of plaque levels. Inter-examiner reliability estimates for the PMI were at a level below Global Plaque index means. Intra-examiner agreement values were similar for both indices. Both scoring systems are considered sufficiently validated to detect product differences in clinical studies.

Clinical Competence↗
PubMed1993

Clinical plaque removal efficacy of three toothbrushes.

A single-blind, randomized clinical study compared plaque removal efficacy of three toothbrush designs under conditions simulating normal use. Ninety (90) subjects with substantially complete dentition used one of the three toothbrushes: Advanced Design Reach, Crest Complete and Oral-B 40. Subjects were examined for plaque before and after a single brushing using the Global Plaque Index to estimate plaque on the entire tooth surface, and the Proximal/Marginal Plaque Index (PMI), a new index, was used to estimate plaque at proximal and marginal surfaces of the teeth. The Advanced Design Reach toothbrush reduced plaque scores significantly more than did the other toothbrushes tested (p < 0.05) using either scoring method. At marginal and proximal sites, combined or separate, Advanced Design Reach toothbrush was significantly more effective than the other toothbrushes in plaque removal and produced significantly more plaque free sites than the other two toothbrushes. Evaluation of all anterior and posterior parts of the dentition with the Global Plaque Index indicated that Advanced Design Reach was superior in removing plaque in these regions. Both plaque indices were highly correlated (correlation coefficient 0.91) indicating excellent consistency by the dental examiner.

Adolescent↗
PubMed1993

Plaque removal efficacy of two children's toothbrushes: a one-month study.

Reach Wonder Grip toothbrush for children was evaluated for plaque removal efficacy and compared to the Colgate Plus Junior (extra soft). The subjects appeared at the test site with overnight (14-18 hours) plaque accumulation. After qualifying for the study, sixty-eight (68) subjects were randomly assigned one of the test brushes. They then participated in the test evaluation at the clinical site wherein plaque levels were measured before and after a one minute brushing. Plaque removal efficacy was evaluated by the Global Plaque Index (percent of tooth surface covered by stained deposit). The subjects then used the assigned toothbrush at home for one month and returned to the test site to repeat the baseline evaluations. After their final plaque evaluations, the subjects were given a new toothbrush from each brand to use at home for one week and the subject and the parent were asked to complete a preference questionnaire. Sixty-seven (67) subjects completed the one month study. After one month's use of twice per day brushing, neither of the test toothbrushes demonstrated any evidence of oral irritation that could be related to toothbrushing. The results indicated that Reach Wonder Grip for Children was significantly more effective (p < 0.05) than Colgate Plus Junior in removing overall (Global) plaque at the initial exam period. The preference questionnaire indicated that the Reach Wonder Grip toothbrush was preferred by both the children and their parents. It is concluded that the new Reach Wonder Grip toothbrush for children is safe and effective for plaque removal.

Child↗