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A photogrammetric method for monitoring changes in the residual alveolar ridge form
Author(s) -
ADAMS L. P.,
WILDING R. J. C.
Publication year - 1985
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1985.tb01550.x
Subject(s) - alveolar ridge , ridge , removable partial denture , dentures , orthodontics , photogrammetry , residual , dentistry , medicine , mathematics , geology , surgery , remote sensing , paleontology , algorithm , implant
Summary Resorption of the residual alveolar ridge calls for regular attention to the fitting surface of a denture. In the case of distal extension partial dentures, changes which occur in less than a year may require attention. These changes are apparent, though difficult to measure using radiographic techniques. Stereopho‐togrammetry is a means of recording and measuring contours of land masses. A short focus non‐metric camera was used in this study to produce stereoscopic paired pictures of four casts of the same partial dentition. Additional casts were made 2 and 12 months after a partial denture had been made. A stereophoto‐grammetric plotting instrument was used to map the alveolar ridge area of each cast. A prescribed area for each map was traced out and the volume above a reference height was calculated. The percentage error between the four columns for the pretreatment casts was _t2%. A 10% loss of ridge volume was observed after wearing a partial denture for.2 months. The same area observed 12 months later revealed an 18% volume reduction. Short range stereophotogrammetry may be applied to study changes in alveolar ridge morphology which may result from wearing a partial denture.