Diagnostic Comparison of Indirect Digital Radiography (PSP) with Paper Print in Diagnosis of Grade I, II Furcation Involvement (In vitro Study)

Abstract

Statement of Problem: The destruction of gingival tissue in the interradicular region of multi rooted teeth is called furcation involvement. The correct diagnosis of furcation lesions are the basis of a successful treatment. Purpose: compare the quality of printed images on desirable papers and indirect digital radiography (PSP) in diagnosis of furcation involvements. Materials and Method: Grade I and grade II furcation involvement were artificially created on 41 mandibular first and second molars and PSP radiography was prepared before and after induction of furcation involvement. Radiographs were printed on radiographic plates using Prima laser printer (Fuji, Japan) and on A4-sized papers (silk) using HP color laserjet 1600 printer. Two observers examined the radiographs and their observations were given to the statistics consultant for data analysis. Results: Positive and negative predictive value (PPV and NPV) of grade I, II (together) furcation involvement for PSP was measured as 96.1 and 84.4, respectively, and for paper print were measured as 100 and 71.9, respectively, in which there were no significant differences between the two in the PPV (Z=1.5, P =0.05) and NPV (Z=1.58, P =0.05). The sensitivities of the plate and paper print in diagnosis of grade I (Z=0, P> 0.05) and grade I, II (Z=1.67, P> 0.05) were not significant. Although, in grade II (Z=2.03, P =0.05), the plate sensitivity was significantly higher than paper print. The specificity of plate in comparison to paper print by considering the significant level of Z =1.96 did not show a significant difference (P =0.05). Conclusion: In general, it seems that in case of lack of access to radiography plates, the use of paper prints can be a justified and appropriate action, due to its relatively good sensitivity and specificity. However, if you have access to radiography plates, it is certainly preferable to use it.