Converting conventional radiographic examination data of trabecular bone pattern values into density measurement values using intraoral digital images
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To determine the conversion value of grayscale density measurements from intraoral conventional radiographic examinations of the edentulous maxilla and mandible using intraoral digital radiography.
Periapical radiography examinations with a pararelling technique, both conventional and digital, were performed on 18 male and 34 female patients with edentulous maxillas and mandibles. The trabecular bone pattern of 42 maxillary and 61 mandibular regions of interest (ROIs) was classified into five grades. Grayscale density measurements were made within a marked area of the ROI in the image of the periapical digital radiograph in the same corresponding trabecular region. To obtain conversion values, including the effects of age, gender, and region of the jaw, an analysis was made to develop regression equations.
The kappa value for intra- and interobserver differences was 0.71–0.85. The strength of the radiographic conventional value to predict the grayscale density measurement of digital radiography was gained from the regression analysis, with R 2 = 0.75–0.8. The regression equation for the maxilla and the mandible were separated, and the age, gender, and region of the jaws were included.
Conventional intraoral radiographic values of the trabecular bone pattern can be converted to values of grayscale density measurements from intraoral digital radiography. The regression equation for the conversion was obtained by including the effects of age, gender, and region of the jaw.
KeywordsConversion value Density measurement Intraoral conventional radiography Digital radiography Regression equation
- 1.White SC, Pharoah MJ. Oral radiology: principles and interpretation. 5th ed. St. Louis: Mosby; 2004. pp. 71–120, 225–77, 314–29, 677–91.Google Scholar
- 2.Whaithes E. Essentials of dental radiography and radiology. 3rd ed. London: Churchill Livingstone; 2007. p. 289–97.Google Scholar
- 10.Altman DG. Practical statistic for medical research. 1st ed. London: Chapman and Hall; 1991. p. 403–9.Google Scholar
- 11.Ulm C, Tepper G. Structure of atrophic alveolar bone. In: Georg W, editor. Implants in qualitatively compromised bone. London: Quintessence; 2004. p. 29–31.Google Scholar
- 12.Misch CE. Contemporary implant dentistry. 2nd ed. St. Louis: Mosby; 1999. p. 73–118.Google Scholar
- 13.Nanci A, Whitson SW, Blanco P. Bone. In: Nanci A, editor. Ten Cate’s oral histology, development, structure, and function. 6th ed. St. Louis: Mosby; 2003. p. 111–44.Google Scholar
- 14.Neukam FW, Kloss FR. Compromised jawbone quantity and its influence on oral implant placement. In: Zarb G, Lekholm U, Albrektsson T, Tenenbaum H, editors. Aging, osteoporosis and dental implants. Chicago: Quintessence; 2002. p. 67–84.Google Scholar
- 15.Mundy GR. Bone resorbing cells. In: Favus MJ, editor. Primer on metabolic bone diseases and disorders of mineral metabolism. 2nd ed. New York: Raven Press; 1993. p. 25–32.Google Scholar