Unplanned molar intrusion after Invisalign treatment

Talens-Cogollos, Laura; Vela-Hernández, Arturo; Peiró-Guijarro, María Aurora; García-Sanz, Verónica; Montiel-Company, José María; Gandía-Franco, José Luis; Bellot-Arcís, Carlos; Paredes-Gallardo, Vanessa

doi:10.1016/j.ajodo.2021.03.019

Cited by 23 publications

(19 citation statements)

References 27 publications

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“…In addition, changes in vertical dimension were also related to molars' vertical movements. Herbst and clear aligners were reported to give rise to molar intrusion [28,29], which offset some mandibular clockwise rotation caused by bite opening effect. Even some studies observed a mandibular counterclockwise rotation in Herbst [30].…”

Section: Skeletal and Dentoalveolar Effect In Four Appliancesmentioning

confidence: 99%

Does mandibular advancement with clear aligners have the same skeletal and dentoalveolar effects as traditional functional appliances?

Qian

Xia

et al. 2023

BMC Oral Health

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Background The study aimed to compare the dentoskeletal effects of Vanbeek Activator, Herbst, Twin-Block and Mandibular Advancement with clear aligners in children with skeletal Class II malocclusions. Methods A sample with sixty-three patients (37 males, 26 females) was included and divided into untreated control group (C, n = 12), Vanbeek Activator group (V, n = 14), Herbst group (H, n = 11), Twin-Block group (TB, n = 12) and MA group (MA, n = 14). Cephalometric analysis and Johnston Pitchfork analysis were performed to quantify the skeletal and dentoalveolar components in molar relationship and overjet correction. Compare the differences of cephalometric data and Johnston-analysis data. Results The treatment changes showed significant differences in SNB, FH-NP, NA-PA, Co-Go, Co-Pog, ANB, lower facial height ratio, U1-PP, U6-PP, L1-MP and U1-L1. All the appliances improved overjet relationships significantly (Vanbeek, Herbst, Twin-Block and MA were 2.77 mm, 5.53 mm, 4.73 mm and 3.66 mm respectively) with significant retraction of maxillary incisors. The lower incisor displacement of group V and MA was negative, while that of group H and TB was positive and there were significant differences. Molar relationships were also improved by 3.45 mm, 6.85 mm, 3.48 mm and 0.92 mm for Vanbeek, Herbst, Twin-Block and MA. Mandible displacement showed a trend of group H > TB > V > MA. The displacement of maxillary molars in group H was greater than that in group C, TB and MA, and that of mandibular ones was greater than that in group C, V and MA, significantly. Herbst, Twin-Block and MA have more significant dentoalveolar effect than Vanbeek, while Vanbeek has more skeletal effect than the others especially in restraining maxillary growth. Conclusions Four appliances are all effective in mandibular advancement, modification of class II molar relationship and deep overjet, with unavoidable increase in lower facial ratio. Vanbeek Activator has the most skeletal effects. Vanbeek and MA have a good control of mandibular incisors while more compensatory lower incisors proclination in Herbst and Twin-Block. Herbst has greater maxillary molar distalization. MA allows aligning and leveling meanwhile leading the mandible forward.

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Section: Skeletal and Dentoalveolar Effect In Four Appliancesmentioning

confidence: 99%

Does mandibular advancement with clear aligners have the same skeletal and dentoalveolar effects as traditional functional appliances?

Qian

Xia

et al. 2023

BMC Oral Health

View full text Add to dashboard Cite

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“…In correcting this type of malocclusion, aligners may be more effective than traditional braces, because they have less of an extrusive effect on the back teeth. Laura Talens‐Cogollos et.al, 13 recently in a retrospective descriptive analytical study concluded that 74.2% of the subjects presented some degree of molar intrusion after CAT. Straight wire mechanics tend to have an extruding effect on the posterior teeth, which favors to aggravate the AOB 14,15 .…”

Section: Discussionmentioning

confidence: 99%

Correction of anterior open bite of varying severity using clear aligner therapy—A case series

Sabouni¹,

Venugopal

Adel

et al. 2022

Clinical Case Reports

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In open bite cases, a comprehensive diagnostic differentiation is crucial in determining the best corrective therapy. In non-surgical open bite treatment, fixed appliances, either labial or lingual, are usually employed. With the addition of extra-radicular screws, more sophisticated orthodontic movements may now be performed without the necessity for orthognathic surgery. Clear aligner therapy, on the contrary, has grown in popularity as a treatment option for more complex cases, such as open bite malocclusions. This article discusses three cases with an anterior open bite that were treated using various mechanics as dictated by the malocclusion. Case 1 was addressed wholly using clear aligner therapy, with careful consideration of attachment geometry and mechanics. Case 2 with clear aligner therapy, attachment geometry selection, and vertical elastics; and Case 3 with clear aligner therapy, attachments, and temporary anchorage devices.

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“…Our reported decrease in the number of occlusal contacts and areas between T0 and T1 corroborates previous published results [8,[30][31][32] It is thought that this occurred due to the thickness of two thermoplastic devices which creates a posterior "open-bite".This is due to their prolonged use between the dental arches, resulting in molar intrusion, [7,33] and altering the number and quality of the existing occlusal contacts, which goes against the final goal of CAT. Horton et al [34].…”

Section: Discussionmentioning

confidence: 99%

Occlusal Changes with Clear Aligners and the Case Complexity Influence: A Longitudinal Cohort Clinical Study

Marcelino

Baptista

Marcelino

et al. 2023

JCM

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Background: Clear aligners (CA) are used 22 h daily, creating a bite-block effect. This work aims to (i) analyze occlusal changes before the beginning of treatment, after the first set of CA and after the use of additional aligners; (ii) compare planned occlusal contacts with the ones obtained after the first set of CA; (iii) analyze the occlusal changes occurred after reaching the orthodontic goals after 3 months of using CA only at night; (iv) evaluate and characterize which tooth movements did not allow the treatment to be completed at the end of the first set of aligners, and finally (v) verify the possible relation between the changes in occlusal contact and areas and parameters such as case complexity and facial biotype. Materials and Methods: A quantitative, comparative, and observational longitudinal cohort study design was implemented to evaluate the clinical data and the complexity levels of cases receiving CA. A non-probabilistic and convenience sample of 82 individuals was recruited. The orthodontic malocclusion traits were classified as simple, moderate, or complex corrections based on the basis of the Align® recommendations with the Invisalign® evaluation tool. According to the Invisalign® criteria, patients need only one complex problem for their case to be classified as complex. Meshlab® v. 2022.02, ClinCheck®version Pro 6.0, My-Itero®version 2.7.9.601 5d plus, and IBM® SPSS Statistics software (Statistical Program for Social Sciences), version 27.0 for Windows were the software ® used. Results: A statistically significant decrease in area and occlusal contacts number were observed from before the start of orthodontic treatment (T0) to the end of treatment (T1). The changes in the occlusal area (from T0 to T1) were statistically different between hyperdivergent (28.24 [15.51–40.91]) and hypodivergent (16.23 [8.11–24.97]) biotypes (p = 0.031). A significant difference between the hyperdivergent (4.0 [2.0–5.0]) and normodivergent (5.5 [4.0–8.0]) group was found in T1 for the anterior contacts (p = 0.044). Anterior contacts obtained were significantly higher than the planned (p = 0.037) Between T1 and T2 statistically significant increases of occlusal areas, posterior and total contacts were observed. Conclusions: Occlusal contact and area were decreased, either at the end of the first set or after the use of additional aligners. Anterior occlusal contacts obtained were higher than planned as opposed to posterior occlusal contacts obtained. The hardest tooth movements to achieve to complete the treatment were distalization, rotation, and posterior extrusion. After completing orthodontic treatment (T1) to 3 months after (T2) using additional aligners only at night, posterior occlusal contacts were significantly increased, which could be due to the natural settling of the teeth in this period.

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Unplanned molar intrusion after Invisalign treatment

Cited by 23 publications

References 27 publications

Does mandibular advancement with clear aligners have the same skeletal and dentoalveolar effects as traditional functional appliances?

Does mandibular advancement with clear aligners have the same skeletal and dentoalveolar effects as traditional functional appliances?

Correction of anterior open bite of varying severity using clear aligner therapy—A case series

Occlusal Changes with Clear Aligners and the Case Complexity Influence: A Longitudinal Cohort Clinical Study

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