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Cross tabulation of intraoral radiograph with periodontal probing for evaluation of furcation involvement for maxillary and mandibular first molars
| Count | Periodontal probing | Total | ||||
|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |||
| Intraoral radiograph | 0 (absence) | 258 | 75 | 13 | 2 | 352 |
| 1 (presence) | 58 | 17 | 39 | 28 | 142 | |
| Total | 316 | 92 | 52 | 34 | 494 | |
