Patients – including one in mid-root canal work – had to leave, according to the Eleutheran.
Mean bone width loss mid-root (S.D).
An ANOVA of the mean bone loss in the three different skeletal patterns at the apex, mid-root, and alveolar crest showed no significance at the apex and alveolar crest, but there was a significant difference at the mid-root.
Buccolingual bone thickness was measured at the root apex, mid-root, and alveolar crest of the mandibular right central incisor.
An ANOVA test showed that the difference in bone loss at the apex and the alveolar crest was not statistically significant but was significant at mid-root.
However, a Bonferroni correction of this difference at mid-root only showed a difference between the average- and high-angle subjects, with no difference found when comparing the low and high or average and low groups.
Mean bone loss after orthodontic treatment as measured at the apex of the central incisor, mid-root, and alveolar crest ranged between 0.24 and 0.58 mm in all three skeletal patterns (Table 3).
A Bonferroni correction of the ANOVA that showed a difference at the mid-root only detected a difference between the average- and high-angle patients, with the greater bone loss in the high-angle subjects.
The buccolingual bony changes were assessed at the apex, mid-root, and alveolar crest, and the root lengths before and after treatment were compared (Fig. 3) by first evaluating the pretreatment scan and then toggling to the posttreatment scan.
Table 3 Summary of mean bone loss at the apex, mid-root, and alveolar crest in low-, andrage-, and high-angle patients Mean bone width loss at apex (S.D).
The reasons for this difference could be the following: (1) they did not measure between the teeth, but across the incisors, and (2) the measurements were obtained at the mid-root level and at the apex making the measurements dependent more on the lengths of the root than on the length of the alveolar bone.
