Evidence map›Paper›PMID 38921511›Full record

ReviewJournal of functional biomaterials2024

Molar Distalization by Clear Aligners with Sequential Distalization Protocol: A Systematic Review and Meta-Analysis.

Christie Shen, Tiffany H Park, Chun-Hsi Chung, Chenshuang Li

Abstract readReview
In one paragraph

Review in Journal of functional biomaterials, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Christie ShenDepartment of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Tiffany H ParkSchool of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Chun-Hsi ChungDepartment of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Chenshuang LiDepartment of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.ORCID 0000-0001-6331-6983

Funding

Small animal model for evaluating the impacts of cleft lip repairing scar on craniofacial growth and developmentR03DE030400 · NIDCR · UNIVERSITY OF PENNSYLVANIA · PI LI, CHENSHUANG · 2023 to 2023
$325k
American Academy of Periodontology Foundation the Dr. Colin Richman And Family Perio.-Ortho. Interface AwardAmerican Association of Orthodontists Foundation Orthodontic Faculty Development Fellowship AwardAmerican Association of Orthodontists Foundation Research Aid AwardInternational Orthodontic Foundation Young Research GrantNIDCR NIH HHS R03 DE030400NIH HHS 1R03DE030400-01A1the American Association for Dental, Oral, and Craniofacial Research Anne D. Haffajee Fellowshipthe Department of Orthodontics, University of Pennsylvania School of Dental Medicine the J. Henry O'Hern Jr. Pilot GrantUniversity of Pennsylvania School of Dental Medicine Joseph and Josephine Rabinowitz Award for Excellence in Research
6 · The paper itself

Abstract

introductionWith the popularity of clear aligners, the sequential distalization protocol has been more commonly used for molar distalization. However, the amount of molar distalization that can be achieved, as well as the accompanying side effects on the sagittal dimension, are unclear.

methodsRegistered with PROSPERO (CRD42023447211), relevant original studies were screened from seven databases (MEDLINE [PubMed], EBSCOhost, Web of Science, Elsevier [SCOPUS], Cochrane, LILACS [Latin American and Caribbean Health Sciences Literature], and Google Scholar) supplemented by a manual search of the references of the full-reading manuscripts by two investigators independently. A risk of bias assessment was conducted, relevant data were extracted, and meta-analysis was performed using RStudio.

resultsAfter the screening, 13 articles (11 involving maxillary distalization, two involving mandibular distalization) met the inclusion criteria. All studies had a high or medium risk of bias. The meta-analysis revealed that the maxillary first molar (U6) mesiobuccal cusp was distalized 2.07 mm [1.38 mm, 2.77 mm] based on the post-distalization dental model superimposition, and the U6 crown was distalized 2.00 mm [0.77 mm, 3.24 mm] based on the post-treatment lateral cephalometric evaluation. However, the U6 mesiobuccal root showed less distalization of 1.13 mm [-1.34 mm, 3.60 mm], indicating crown distal tipping, which was validated by meta-analysis (U6-PP angle: 2.19° [1.06°, 3.33°]). In addition, intra-arch anchorage loss was observed at the post-distalization time point (U1 protrusion: 0.39 mm [0.27 mm, 0.51 mm]), which was corrected at the post-treatment time point (incisal edge-PTV distance: -1.50 mm [-2.61 mm, -0.39 mm]).

conclusionAbout 2 mm maxillary molar distalization can be achieved with the sequential distalization protocol, accompanied by slight molar crown distal tipping. Additional studies on this topic are needed due to the high risk of bias in currently available studies.

Indexed as

anchorage lossclear alignersmolar distalizationorthodonticssequential distalization

Identifiers

PMID38921511
PMCPMC11204968

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.