![]() Although these statements are not evidence based, there have been case reports showing successful treatment of patients with moderate to severe anterior open bites. It has also been theorized that aligners can help with habit modification such as tongue thrusting due to the presence of plastic covering the anterior teeth. Conversely, anecdotal evidence shows that aligners may help intrude posterior teeth because of the thick plastic covering the posterior teeth and the patient’s natural masticatory forces. Straight wire mechanics tend to extrude the posterior teeth which tend to worsen the anterior open bite. Aligners may be advantageous in treating this type of malocclusion as they do not produce the same extrusive effect on the posterior teeth as would occur with traditional brackets. Clear aligners are effective in reducing/controlling the vertical dimension in open bite patients.Īdvances is clear aligner technology have expanded the scope of clear aligners from treatment of simple malocclusions to more complex approaches such as treatment of anterior open bites. Significant retraction of maxillary and mandibular incisors was also observed with treatment. ![]() Open bite closure with clear aligners occurred due to a combination of maxillary and mandibular incisor extrusion and maxillary and mandibular molar intrusion, with slight mandibular auto rotation. Regarding molar position, no significant changes were noted in the anteroposterior position of the upper and lower molar however, there was a statistically significant intrusion of the upper and lower molar. The lower incisors also showed significant retraction and extrusion (ΔL1-MP′(mm) = 0.53 ± 0.74). During treatment, the upper incisors showed significant ( p < 0.05) retraction, and extrusion. ResultsĪ total of 45 patients were included for data analysis with a mean age of 30.73 ± 8.0 years and initial open bite of − 1.21 ± 1.15 mm. Inclusion criteria consisted of anterior open bite (overbite < 0.5 mm), adult patients (18+) at the beginning of treatment, consecutive records, and good quality pre- and post-treatment records, where the required landmarks were clearly visible. In this single-center retrospective study, the mechanism of anterior open bite closure using clear aligners (Invisalign, Align Technology, Santa Clara, CA, USA) was evaluated by cephalometric superimposition based on records of patients consecutively treated by a single, experienced Invisalign provider. Further study is required to evaluate the image quality and reproducibility of images with the new bite block.īite Block Panoramic, Radiography Reproducibility of Results.To evaluate the dental and skeletal effects that occur in the correction of anterior open bite with clear aligners. The newly proposed bite block for panoramic radiographs of edentulous patients showed better reliability. Patients also showed less movement and more stable positioning during panoramic radiography with the new bite block.Ĭonventional errors in panoramic radiographs of edentulous patients could be caused by unreliability of the chin-support device. Panoramic radiographs taken with the new bite block showed better stability and bilateral symmetry than those taken with the conventional chin-support device. ![]() The panoramic radiographs using the new bite block were compared with those using the conventional chin-support device. The height of the new bite block was 18 mm and to compensate for the horizontal edentulous space, its horizontal width was 7 mm. The new bite block was designed and implemented in light of previous studies. The aim of this report was to propose a new bite block for panoramic radiographs of anterior edentulous patients that better addresses these two issues.Ī new panoramic radiography bite block similar to the bite block for dentulous patients was developed to enable proper positioning stability for edentulous patients. Panoramic radiographs taken using conventional chin-support devices have often presented problems with positioning accuracy and reproducibility. ![]()
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