Table 1.
First molar furcation involvement assessed by periodontal probing
| Modified Glickman classificationa | Maxillary first molar | Mandibular first molar | |||||
|---|---|---|---|---|---|---|---|
| B | MP | DP | Average | B | L | Average | |
| Not presentb | 49.1% | 78.4% | 83.6% | 70.4% | 60.8% | 53.9% | 57.4% |
| Class I | 34.5% | 7.8% | 5.2% | 15.8% | 18.6% | 27.5% | 23.1% |
| Class II | 9.5% | 6.9% | 6.0% | 7.5% | 13.7% | 11.8% | 12.8% |
| Class III | 6.9% | 6.9% | 5.2% | 6.3% | 6.9% | 5.9% | 6.4% |
| Total | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
Data are presented as percentage of assayed surfaces without or with furcation involvement of corresponding category based on periodontal charting
Abbreviations: B buccal, MP mesial palatal, DP distal palatal, L lingual
aModified Glickman classification: Class I, incipient or early stage of furcation involvement, bone destruction is less than 2 mm into the furca; Class II, horizontal bone destruction extending deeper than 2 mm but less than 6 mm into the furca; Class III, horizontal bone destructions communicate between furcae of the tooth, and result in a through-and-through tunnel
bNot present: no furcation involvement