Dento maxillo facial radiology · 2007
The flaws in tooth root resorption assessment algorithms: the role of source position.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
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Ошибки и ограничения
История · было → стало
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Katona T R
Аннотация
OBJECTIVES: The purpose of this project was to analyse the effects of X-ray source location on mathematical compensations used in the clinical assessment of external apical root resorption (EARR).
METHODS: Using geometric constructions, governing equations were derived to express the relationships between actual tooth, root and crown lengths, and their image sizes on "before" and "after" radiographs.
RESULTS: Good agreement was found between calculated and published experimental results. More importantly, errors associated with the assessment methods are demonstrated.
CONCLUSION: It is established that root resorption assessment algorithms cannot reliably compensate for the inherent distortions in radiographic evaluations of EARR, even in the best-case scenario of an idealized, precisely characterized, linear tooth.
METHODS: Using geometric constructions, governing equations were derived to express the relationships between actual tooth, root and crown lengths, and their image sizes on "before" and "after" radiographs.
RESULTS: Good agreement was found between calculated and published experimental results. More importantly, errors associated with the assessment methods are demonstrated.
CONCLUSION: It is established that root resorption assessment algorithms cannot reliably compensate for the inherent distortions in radiographic evaluations of EARR, even in the best-case scenario of an idealized, precisely characterized, linear tooth.