Fig. (1a and b) The alveolar bone level (ABL) was measured as distance between the cemento-enamel junction (CEJ, *) and a drawn line connecting the most coronal point of the interdental alveolar crest (CP, °). The periodontal ligament space (PLS) was measured as the shortest distance between the tooth surface and the respective CP, along a line connecting the mesial and distal CP. Fig. (1a) test group, Fig. (1b) control group.

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