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Fig. 3 | Trials

Fig. 3

From: Efficacy and safety of piezocision in accelerating maxillary anterior teeth en-masse retraction: study protocol for a randomized controlled trial

Fig. 3

Measurements of the root length, labial and palatal alveolar bone thickness, and the vertical bone height of maxillary anterior teeth. Line 0 represents the long axis of the teeth and line 1 the CEJ, while line 4 is parallel to line 1 and passes through the root apex. The root length will be divided into 3 equal parts by line 2 and line 3. Meanwhile, a, b, c, d, e, and f represent the distance from the labial and palatal alveolar bone to the root surface. The VBH will be measured as the distance between the CEJ and the alveolar bone crest

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