For a patient with extensive bone loss in periodontal disease where bone defects extend beyond the range of bitewing radiographs, which radiograph provides the most complete assessment?

When bone loss is severe enough that it extends beyond the coverage of bitewing radiographs (which typically show only the coronal 4-5 mm of root), periapical (PA) radiographs are the most appropriate choice for complete assessment. Periapical radiographs show the entire root length, alveolar bone, and periapical region, allowing complete visualization of bone loss extent, root morphology, and furcation involvement even in advanced periodontal disease. A full-mouth periapical series combined with bitewing radiographs provides comprehensive periodontal radiographic assessment. The original answer for this question listed 'Bitewing' which conflicts with question 84's answer — this question specifically asks about excessive/severe bone loss beyond bitewing range.