Primary tooth length determination in direct digital radiography: An in vivo study
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Data
2007-11-01
Autores
Santos-Pinto, Lourdes Aparecida Martins dos [UNESP]
Loiola Cordeiro, Rita de Cassia [UNESP]
Cilense Zuanon, Angela Cristina [UNESP]
Basso, Maria Daniela
Gonçalves, Marcelo [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Amer Acad Pediatric Dentistry
Resumo
Purpose: the purpose of this in vivo study was to compare the accuracy of primary incisor length determined by direct digital radiography (straight-line measurement and grid superimposition) and measurement of the actual tooth length. Methods. Twenty-two primary maxillary incisors that required extractions were selected from 3- to 5-year-old children. The teeth were radiographed with an intraoral sensor using the long cone technique and a sensor holder (30-cm focus-to-sensor distance). The exposure time was 03 seconds. Tooth length was estimated by using straight-line and grid measurements provided by the distance measurement feature of the Computed Dental Radiography digital dental imaging system. The actual tooth length was obtained by measuring the extracted tooth with G digital caliper. Data were analyzed statistically by Pearson's correlation coefficient and a paired t test. Results: There were statistically significant differences (P=.007) between the 2 measurement techniques and between the actual tooth lengths and grid measurements. There was no statistically significant difference (P=38) between straight-line measurements and actual tooth lengths, showing that the straight-line measurements were more accurate. Underestimation of the actual tooth length, however, occurred in 45% of the straight-line measurements and in 73% of the grid measurements. Conclusion: It is possible to determine primary tooth length in digital radiographs using onscreen measurements with 0 reasonable degree of accuracy.
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Palavras-chave
computer-assisted imaging processing, diagnostic imaging, digital radiography, primary tooth, tooth length
Como citar
Pediatric Dentistry. Chicago: Amer Acad Pediatric Dentistry, v. 29, n. 6, p. 470-474, 2007.