Evidence map›Paper›PMID 37455279›Full record

ArticleProgress in orthodontics2023

Impact of molar teeth distalization by clear aligners on temporomandibular joint: a three-dimensional study.

Barakat Al-Tayar, Majedh A A Al-Somairi, Lina H ALshoaibi, Xiaoli Wang, Junbin Wang, Jiajie Liu, Baher Al-Tayar, Xiaoli An, Qingzong Si

Open access · diamondAbstract read
In one paragraph

Article in Progress in orthodontics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 7% of its field
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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.

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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

9 authors at 3 institutions in 3 countries.

Barakat Al-TayarDepartment of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
Majedh A A Al-SomairiOrthodontics Department, School of Stomatology, China Medical University, Shenyang, 110000, China.
Lina H ALshoaibiDepartment of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
Xiaoli WangDepartment of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
Junbin WangDepartment of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
Jiajie LiuDepartment of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
Baher Al-TayarGraduate Student of Dental Health Science, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia.
Xiaoli AnDepartment of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou, 730000, China. anxl@lzu.edu.cn.ORCID http://orcid.org/0000-0002-6680-6205
Qingzong SiDepartment of Oral Medicine, School of Stomatology, Lanzhou University, Lanzhou, 730000, China.
Lanzhou University · CNAirlangga University · IDChina Medical University · CN

Funding

The project of the National Natural Science Foundation of Gansu Province, China 20JR5RA264the project of the School/Hospital of Stomatology, Lanzhou University lzukqky-2020-t04
6 · The paper itself

Abstract

backgroundMaxillary molar distalization is a common technique used in the non-extraction treatment of Angle Class II malocclusion that can effectively correct the molar relationship and create spaces for anterior teeth alignment. However, this approach may also impact the temporomandibular joint (TMJ) due to predictable changes in the posterior vertical dimension. Despite its widespread use, Class II malocclusions correction by molar distalization with clear aligners has not been investigated for their effects on the TMJ. Therefore, this study aimed to analyze the impact of sequential molar distalization using clear aligners on the TMJ.

methodsThree-dimensional CBCT scans of 23 non-growing patients (7 males, 16 females; mean age 29.8 ± 4.6 years) with skeletal class I or II malocclusion and a bilateral molar class II relationship treated by sequential upper molars distalization with orthodontic clear aligners (Invisalign, Align Technology, San Josè, Ca, USA). A total of 46 joints were examined before and after molar distalization using Anatomage InvivoDental 6.0.3. Linear and angular measurements of the mandibular joint were measured, including joint parameters, inclination, position, and the dimension of the condyle and articular fossa. In addition, 3D volumetric spaces of the joint were analyzed. All data were statistically analyzed by paired T test to determine the differences between the pre-and post-orthodontic procedures.

resultsNo statistically significant differences were found in all primary effects resulting from maxillary molars distalization by clear aligners on TMJ components measurements and joint spaces between T0 and T1. Meanwhile, statistically significant differences were observed in the linear position of the upper molars and the molar relationship parameter with at least P ≤ 0.05.

conclusionTreatment by sequential upper molars distalization with clear aligners does not lead to significant TMJ parameters changes in condyle and fossa spaces, dimensions, and positions.

Indexed as

Malocclusion, Angle Class IIOrthodontic Appliances, RemovableTooth Movement TechniquesAdultCone-Beam Computed TomographyFemaleHumansMaleMalocclusionMaxillaMolarTemporomandibular Joint3D analysisClass II malocclusionClear alignersCone-beam computed tomographyMolar distalizationTemporomandibular joint

Identifiers

PMID37455279
PMCPMC10350446
OpenAlexW4384465859

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.