Premium
The width of plaque‐free zones on primary molars with attachment loss
Author(s) -
Keszthelyi G.
Publication year - 1991
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/j.1600-051x.1991.tb01695.x
Subject(s) - molar , stereo microscope , dentistry , mandibular second molar , orthodontics , medicine
Abstract The width of plaque‐free zones on stained surfaces of extracted primary molars showing attachment loss was measured. The teeth were divided into 4 groups: maxillary first and second molars, mandibular first and second molars. 30 measurements were made under a stereomicroscope on each of the 4 surfaces in every group. The plaque‐free zone had a mean width of 1.75 ± 0.49 mm and a range of 1.0–4.3 mm. The plaque‐free zone was significantly ( P < 0.001) wider on the proximal surfaces (1.94 ± 0.56 mm) than on the combined buccal and lingual surfaces (1.56 ± 0.32 mm). There was no difference between the 2 proximal surfaces while the lingual surfaces gave higher values than the buccal ones. On the second and on the lower primary molars, the plaque‐free zones were wider than on the first and on the upper molars.