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Periodontal ultrasonic diagnosis: experiments on thin bony platelets and on a simulated periodontal ligament space
Author(s) -
Löst C.,
Nüssle W.
Publication year - 1988
Publication title -
journal of periodontal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.31
H-Index - 83
eISSN - 1600-0765
pISSN - 0022-3484
DOI - 10.1111/j.1600-0765.1988.tb01612.x
Subject(s) - periodontal fiber , ultrasonic sensor , dental alveolus , biomedical engineering , ultrasound , alveolar crest , materials science , dentistry , medicine , physics , acoustics
In this study we tried to determine whether it is fundamentally possible to image the periodontal ligament space over the buccal and lingual root surface in the ultrasonic graph. The imaging of the space is an essential requirement for the exact determination of the thickness of the facial or oral alveolar bony plate. In addition, the clear visual differentiation of bone and root enables an exact and reliable determination of the contour of the facial alveolar crest. The following devices were used:—a digital ultrasound imaging system developed on the basis of many preliminary experiments;—three high‐resolution transducers which can theoretically display a space width of 0.2 mm. Studies were performed on bone specimens and on a simple model of the periodontal space ideal for ultrasonic experiments. It was shown that the ultrasonic pulses emitted by the transducer can penetrate plane parallel‐cut bony platelets which are up to 2 mm thick. Aside from this, we succeeded in acquiring a resolved image of each interface of very thin bony platelets (minimum 0.12 mm). In another series of experiments the sonographic representation of simulated periodontal spaces having clinically relevant dimensions is demonstrated on an ideal model.