Vertical Dimension Control in Two Different Treatment Protocols: Invisalign First and Bite Block—A Retrospective Study

background: the aim of the present study was to compare the vertical dimension changes, before and after treatment, in two groups of growing patients, one group treated with clear aligner therapy versus a group treated with quad-helix and bite-block therapy. methods: the studied sample was composed of n. 40 patients (20 females and 20 males with a mean age of 8.6 ± 1.8 years), enrolled from the department of orthodontics at policlinico of rome tor vergata. the original sample was randomly divided into two groups: group IF (invisalign first) and group BB (quad-helix and bite block). pre- (T0) and post-treatment (T1 after 12 months) lateral cephalograms were collected from all the selected patients. nine cephalometric parameters, both angular and linear, were measured and recorded for each cephalogram. results: no statistically significant changes were found between both the IF and BB groups at T0, while statistically significant changes were observed in both groups (BB and IF) between T0 and T1 (after 12 months of active therapy), p < 0.005. conclusions: both therapies were able to control the patient’s vertical condition. to date, the use of conventional appliances seems to have slightly better efficacy in controlling the vertical dimension than aligner therapy.