The results show that a particular toothbrushing technique as modified Bass method is significantly superior to normal toothbrushing practices in supragingival plaque removal. The introduction of a specific toothbrushing technique, such as modified Bass technique represents an important improvement in the oral hygiene of the patients.

Teeth were best viewed on periapical radiographs except maxillary second and third molars, which were better viewed in orthopantomograms. Orthopantomograms on screen were scorable more often than when on printed images. Apical periodontitis was scored more often on paper than on screen, and more often on screen than in periapical radiographs.

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