The predictability of transverse changes with Invisalign

Houle, Jean-Philippe; Piedade, Luis; Todescan, Reynaldo; Pinheiro, Fábio Henrique

doi:10.2319/122115-875.1

Cited by 142 publications

(130 citation statements)

References 15 publications

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“…This could be the reason why, as stated by Houle et al, aligners become less accurate going from the anterior to the posterior region. 20 Considering the overall results obtained through FEM analysis, it could be stated that the most efficient configuration in displacement/anchorage loss/PDL stress ratio was ATT 4.5 with 1.28 of activation. Generally speaking, 1.28 of activation seemed to deliver force levels on the PDL, which better fit with the ''optimal force paradigm'' of biology of tooth movement.…”

Section: Discussionmentioning

confidence: 96%

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Cortona¹,

Rossini

Parrini

et al. 2019

The Angle Orthodontist

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Objective: To evaluate, using the finite element method, the orthodontic rotational movement of a lower second premolar obtained with clear aligners, analyzing different staging and attachment configurations. Materials and Methods: A CAD model including a complete lower dental arch (with element 4.5 mesially rotated 308) and the corresponding periodontal ligaments, attachments, and aligner was designed and imported to finite element software. Starting from the CAD model, six projects were created to simulate the following therapeutic combinations for correcting element 4.5 position: (1) without attachments, (2) single attachment placed on the buccal surface of element 4.5, (3) three attachments placed on the buccal surfaces of teeth 4.4 to 4.6. For each project, both 1.28 and 38 of aligner activation were considered. Results: All the analyzed configurations revealed a clockwise rotation movement of element 4.5 on the horizontal plane. Models with attachments showed a greater tooth displacement pattern than models without attachments. Simulations with attachments and 38 of aligner activation exhibited the best performance concerning tooth movement but registered high stresses in the periodontal ligaments, far from the ideal stress levels able to produce tooth rotational movement. Conclusions: The model with a single attachment and 1.28 of aligner activation was the most efficient, followed by the three attachment model with the same degree of activation. Aligner activation should not exceed 1.28 to achieve better control of movement and reasonable stress in periodontal structures. (Angle Orthod. 2020;90:247-254.)

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Section: Discussionmentioning

confidence: 96%

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Cortona¹,

Rossini

Parrini

et al. 2019

The Angle Orthodontist

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“…It is important to only evaluate recent evidence for products that are constantly evolving. There have been many new updates in clear aligner technology such as precision cuts, precision bite ramps and tooth attachments that possibly have resulted in a more precision for tooth movement . This could mean that some of the drawbacks previously identified with this therapy have been addressed, at least partially, in updated versions.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of clear aligner therapy for orthodontic treatment: A systematic review

Robertson

Kaur

Fagundes

et al. 2019

Orthod Craniofacial Res

192

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Objective To analyse through a systematic review the effectiveness of clear aligners by assessing: (a) predictability of clear aligners and (b) treatment outcome comparison of clear aligner therapy with fixed appliance therapy. Methods An electronic search was made from January 2014 to April 2019 using MEDLINE, Embase, Web of Science and LILACS databases without any limitations on language. Three reviewers independently assessed the articles. Quality assessment of observational studies and randomized control trial was done by using the ROBINS tool and Cochrane risk of bias tool, respectively. GRADE instrument was used to assess certainty level for each identified outcome. Results Seven eligible articles (one randomized controlled trial and six retrospective cohort) were included in our systematic review. Most of the studies (six out of seven) had a moderate risk of bias and one had a high risk of bias. Conclusions ‘Low to moderate level’ of certainty in regard to specific clear aligner therapy tooth movements’ efficiency was identified. Clear aligners may produce clinically acceptable outcomes that could be comparable to fixed appliance therapy for buccolingual inclination of upper and lower incisors in mild to moderate malocclusions. However, not all potential clinical scenarios have been assessed in the included studies. Most of the tooth movements may not be predictable enough to be accomplished with only one set of trays with clear aligners despite the recent advances in technology.

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“…Eine schwierige Zahnbewegung für herausnehmbare Aligner ist jedoch die dentoalveoläre Expansion: In der Maxilla werden nur 72,8 % der geplanten Expansion erreicht: 82,9 % im Bereich der Zahnkronen und 62,7 % im Bereich der Gingiva [13]. Daher ist eine geplante Überkorrektur, die präoperativ beinahe einen posterioren Scherenbiss erzeugt, essentiell.…”

Section: Diskussionunclassified

Kombiniert kieferorthopädische-kieferchirurgische Therapie einer Klasse-II-Dysgnathie mit Invisalign

Triessnig

Reistenhofer

Besser-Kizilyamac

et al. 2018

Inf Orthod Kieferorthop

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ZusammenfassungIn dem vorliegenden Fallbericht wird die kombiniert kieferorthopädisch-kieferchirurgische Behandlung einer 24-jährigen Patientin mit Klasse-II-Dysgnathie präsentiert, wobei die kieferorthopädische Behandlung ausschließlich mit Invisalign-Schienen durchgeführt wurde. Während der gesamten Behandlung wurden sowohl auf Brackets als auch auf einen OP-Splint verzichtet und so kam es während der gesamten Behandlungszeit von 1 Jahr und 5 Monaten zu keinerlei ästhetischer Beeinträchtigung durch kieferorthopädische Maßnahmen.

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The predictability of transverse changes with Invisalign

Cited by 142 publications

References 15 publications

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Effectiveness of clear aligner therapy for orthodontic treatment: A systematic review

Kombiniert kieferorthopädische-kieferchirurgische Therapie einer Klasse-II-Dysgnathie mit Invisalign

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