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Periodontal ligament areas and occlusal forces in dentitions restored with cross‐arch unilateral posterior two‐unit cantilever bridges
Author(s) -
Laurell Lars,
Lundgren Dan
Publication year - 1986
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.1986.tb01411.x
Subject(s) - periodontal fiber , biting , abutment , bite force quotient , dentistry , orthodontics , dentition , medicine , occlusion , positive correlation , biology , surgery , ecology , civil engineering , engineering
This investigation was undertaken in order to analyse to what extent the magnitudes of chewing and biting forces in dentitions restored with cross‐arch unilateral posterior two‐unit cantilever bridges are correlated to the area of the periodontal tissue supporting the abutments. 12 subjects, whose dentitions were periodontally treated and prosthetically restored, participated in the study. The chewing and biting forces, simultaneously measured in various parts of, as well as over the entire dentition, were correlated to the periodontal ligament areas of the abutments supporting the bridge constructions. A strong positive correlation ( r = 0.83; P <0.01) was found between the total remaining periodontal ligament area and the mean total chewing force. A positive correlation ( r = 0.57; P = 0.05) was also found between the local remaining periodontal ligament area of the posterior end abutment tooth and the local chewing force in that region. No positive correlation was found between the amount of periodontal tissue support and the magnitude of the forces developed during biting with maximal strength in habitual occlusion either totally or locally, although there was a strong tendency ( r = 0.54; 0.6 > P >0.5) towards decreasing total maximal bite force with decreasing total remaining periodontal ligament area. A strong positive correlation ( r = 0.74; P < 0.01) was found on the end abutment side between the local remaining periodontal ligament area of the end abutment tooth and the local forces in that region during biting with maximal strength over a limited area at a time. The remaining periodontal ligament area of the abutment tooth adjoining the cantilever segment was not found to have any influence on the local chewing or biting forces over the distal cantilever segment. Clinical implications of the findings are discussed.