Читать книгу Periodontics - Fernando Suarez - Страница 98
CLASSIFICATION FOR ROOT PROXIMITY
ОглавлениеVermylen et al proposed a classification system for root proximity to indicate location (apical, middle, and coronal third) and severity based on modification of the ruler used by Schei et al123 and findings from Heins and Wieder120 as depicted in Table 5-9.113
TABLE 5-9 Classification for root proximity by Vermylen et al113
| Location | A | Apical third of the root |
| B | Intervening (middle) third of the root | |
| C | Coronal third of the root | |
| Severity | 1 | > 0.5 and ≤ 0.8 mm. A small amount of cancellous bone is present between the adjacent roots. |
| 2 | > 0.3 and ≤ 0.5 mm. Only cortical and connective tissue attachment is present between the adjacent roots. | |
| 3 | ≤ 0.3 mm. Only connective tissue attachment is present between the adjacent roots. |
