PMID: 8971651Nov 1, 1996Paper

Digital image ratio: a new radiographic method for quantifying changes in alveolar bone. Part II: Clinical application

Journal of Periodontal Research
A JeanJ P Ouhayoun

Abstract

As reported in a previous paper (1) we have developed a new technique, Digital Image Ratio (DIR), which theoretically avoids some of the drawbacks of quantitative digital substraction radiography. DIR allows the direct computation and visualization of bone-mass-ratio changes. This second paper describes the use of DIR analysis to examine 20 sites in 8 patients undergoing regenerative periodontal therapy. Standardized reproducible radiographs of these 20 sites were taken before and 12 months after surgery. Ten experimental sites were treated with bone graft substitutes (natural coral or natural coral+collagen), and 10 control sites by debridement alone. None of the experimental sites had a density ratio below 1, where 1 indicates no change. The error was +/- 0.07 (0.93-1.07). The experimental sites showed an 18% mean increase in bone density (1.18), which increased to 23% (1.23) for sites filled with natural coral alone. All the control sites had values close to 1.00 (1.00 +/- 0.07) except for 3 sites, which showed a 9-15% loss of bone density. It is thus possible to compare and quantify the changes in experimental and control sites in the same patient using the percentage gain or loss of bone density. This demonstrates that DIR...Continue Reading

References

Nov 1, 1992·Dento Maxillo Facial Radiology·H G Gröndahl
Mar 1, 1992·Clinical Oral Implants Research·M K JeffcoatE Bertens
Sep 1, 1990·Journal of Periodontal Research·R L WebberT J Heaven
Nov 1, 1989·Journal of Periodontal Research·B SteffensenK S Kornman
May 1, 1989·Journal of Clinical Periodontology·P T Janssen, J van Aken
Nov 1, 1986·Journal of Periodontal Research·M H VosR M Heethaar
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Feb 1, 1983·Oral Surgery, Oral Medicine, and Oral Pathology·H G Gröndahl, K Gröndahl

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Citations

Jul 19, 2018·Journal of Applied Oral Science : Revista FOB·Osny Ferreira JúniorPaulo Sérgio Perri de Carvalho
Apr 9, 2008·Seminars in Cutaneous Medicine and Surgery·Rosemarie H Liu, Victoria P Werth
Dec 11, 2002·Addiction·Hans Joachim SalizeFritz Henn

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