Impact of molar teeth distalization with clear aligners on occlusal vertical dimension: a retrospective study

Abstract

Background: A common strategy in the non-extraction treatment of Class II molar relationship is maxillary molar distalization, which could increase lower face height and cause clockwise mandibular rotation. The aim of this retrospective study was to analyse the effects on vertical dentoskeletal dimension of young adults treated with sequential distalization with orthodontic aligners. Methods: Lateral cephalometric radiographs of 10 subjects (8 females 2 males; mean age 22.7 ± 5.3 years) treated with upper molars sequential distalization with orthodontic aligners (Invisalign, Align Technology, San Josè, California, USA) were analyzed. Results: No statistically significant difference was observed for the primary outcome SN-GoGn between T0 and T1 and it was recorded a mean variation of 0.1 ± 2.0 degrees. Statistically significant differences were found in the linear position of the upper molars (6-PP, 7-PP) the molar class relationship parameter (MR) and the upper incisive inclination (1^PP) with at least p < 0.01. Conclusions: Upper molar distalization with orthodontic aligners guarantee an excellent control of the vertical dimension representing an ideal solution for the treatment of hyperdivergent or openbite subjects. It also allows an excellent control of the incisal torque without loss of anchorage during the orthodontic procedure.

The Effect of High-Frequency Vibration on Tooth Movement and Alveolar Bone in Non-Growing Skeletal Class II High Angle Orthodontic Patients: Case Series

“…The use of jaw bra type of vertical pull chin cup to control the vertical dimension is new to report her. Similar vertical control has been reported previously during distalization using clear aligners [ 30 ]. One limitation of this study is that there were no control cases to demonstrate what could have occurred if the VPro5 device was not used.…”

Dentoskeletal Class II Malocclusion: Maxillary Molar Distalization with No-Compliance Fixed Orthodontic Equipment

“…A similar finding was also reported for the 21 adult patients treated by Ravera and Castroflorio with clear aligners, where the values of U6 distalization of 2.25 mm at mean was reported, without significant any extrusion of the same tooth [36] and more recently, from Caruso et al [41] For some of the considered appliances, there are also data concerning their acceptance by patients, as for example for the Forsus appliance [38], and for the Carrier 3D Motion appliance [42]. The following considerations are generally derived from these studies: the great part of patients report a difficulty to eat soon after positioning the fixed device, improving with time.…”

Salivary concentrations of Streptococcus mutans and Lactobacilli during an orthodontic treatment. An observational study comparing fixed and removable orthodontic appliances

“…The attention on clear aligners has ultimately increased over time, mostly because they are often used to manage pre‐prosthetic clinical cases (Dinoi et al, ), also affected by temporo‐mandibular joint diseases, (Tecco, Festa, Salini, Epifania, & D'Attilio, ) or adult patients for which a molar distalization is required, owing a great attention to the periodontal health status (Caruso et al, ) But, also in children, this type of removable appliance has been increasingly used, for example, to manage clinical cases with a single tooth anterior crossbite, to prevent further progress of periodontal diseases. (Meuli, Tecco, Nota, Gatto, & Caruso, ) (Silvestrini‐Biavati et al, )…”