Crevicular Alkaline Phosphatase Activity and Rate of Tooth Movement of Female Orthodontic Subjects under Different Continuous Force Applications

Table 2

The assessment scores for apical and lateral root resorption using periapical radiographs (17).

Score	Apical root resorption	Lateral root resorption
0	No apical root resorption	Smooth lateral root surface and periodontal ligament
1	Slight blunting of the canine root apex	Slightly irregular lateral root surface; not beyond one-third of the dentine width between the distal-side periodontal ligament and pulp chamber
2	Moderate resorption of the root apex beyond blunting and up to one-fourth of the root length	Moderate irregular lateral root surface beyond one-third and up to two-thirds of the dentine width between the distal-side periodontal ligament and pulp chamber
3	Excessive resorption of the root apex beyond one-fourth of the root length	Excessive irregularity of the lateral root surface beyond two-thirds of the dentine width between the distal-side periodontal ligament and pulp chamber