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Aim To compare the use of periapical radiographs and digital panoramic images displayed on monitor and glossy paper in the assessment of the periapical status of the teeth using the periapical index (PAI). Methodology A total of 86 subjects were examined. All participants underwent a full-mouth radiographic survey (14 periapical radiographs) and a panoramic radiography. The periapical status, using the PAI score, of all appraised teeth was assessed. Results Periapical radiographs allowed the assessment of the periapical status of 87% of teeth using the PAI. On the contrary, digital radiography had a significantly reduced potential to allow assessment of the periapical status (P

Four brands of endodontic paper points were subjected to tests for sterility, antibacterial activity, and suitability as vehicles for bacteriological sampling procedures. No brand showed growth in the sterility assay. One brand showed weak but reproducible antibacterial activity. Recovery of viable bacteria after absorption into the points varied and appeared to depend both on the brand of point and on the bacterial strain used. One brand appeared ineffectual for clinical bacteriological sampling procedures.

We have conducted an experimental study in which dentine disks and Whatman paper were used to test discoloring effects of disinfectants, antibiotics, and flushing solutions used in endodontics. Each of the chemicals was tested alone and in the presence of a 1 per cent suspension of human erythrocytes in saline solution. Polyantibiotic and disinfectant pastes were used as dressings on recently extracted teeth, which were then split open to show discoloration. The most severe discoloring action was exhibited by the two N2 pastes and by polyantibiotic pastes containing Terramycin and Declomycin.