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Estimation of the remaining periodontal ligament from attachment‐level measurements
Author(s) -
Yamamoto T.,
Kinoshita Y.,
Tsuneishi M.,
Takizawa H.,
Umemura O.,
Watanabe T.
Publication year - 2006
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.2006.00888.x
Subject(s) - clinical attachment loss , dentistry , periodontal fiber , periodontal disease , mathematics , medicine
Aim: Accurate assessment of the remaining area of periodontal attachment assists in determining the prognosis of a tooth. The aim of this study was to determine formulae to estimate the remaining area of periodontal attachment from attachment‐level measures. Materials and Methods: Roots of 30 extracted teeth of each tooth type were coated with vinyl acetate solution and α ‐cyanoacrylate monomer to produce a membrane. The membrane was removed after guidelines were drawn to simulate various attachment levels. The root surface area on the apical side of each simulated attachment level was measured using image analysis software. The net or percent root surface area and corresponding attachment level data were fitted to a linear, quadratic, cubic, and exponential functions and a growth curve. Results: The linear function provided the most appropriate fit for the data. For net root surface area, a steeper slope was evident for tooth types with a larger mean total root surface area. For percent root surface area, a steeper slope was evident for tooth types with a shorter root length. Conclusions: A linear function provides the most appropriate formula for estimation of the remaining area of periodontal attachment based on the attachment‐level measurement.