Evidence map›Paper›PMID 42029001›Full record

ArticleOrthodontics & craniofacial research2026

Functional Unit-Based Analysis Unveils the Skeletal Mandibular Effects of Class II Elastics Therapy in Adolescents.

Ehab A Abdulghani, Li Mei, Abeer A Al-Sosowa, Shijia Li, Majedh Abdo Ali Al-Somairi, Maged S Alhammadi, Jianru Yi, Yu Li

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In one paragraph

Article in Orthodontics & craniofacial research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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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

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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

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0 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Ehab A AbdulghaniState Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.ORCID https://orcid.org/0000-0002-3392-4248
Li MeiDiscipline of Orthodontics, Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand.ORCID https://orcid.org/0000-0001-7856-8091
Abeer A Al-SosowaDepartment of Periodontology, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China.ORCID https://orcid.org/0000-0003-3318-1381
Shijia LiState Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.ORCID https://orcid.org/0000-0001-8445-6969
Majedh Abdo Ali Al-SomairiDepartment of Orthodontics, School and Hospital of Stomatology, China Medical University, Shenyang Clinical Medical Research Center of Orthodontic Disease, Shenyang, People's Republic of China.
Maged S AlhammadiDivision of Orthodontics and Dentofacial Orthopedics, Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.ORCID https://orcid.org/0000-0002-1402-0470
Jianru YiState Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.ORCID https://orcid.org/0000-0003-3594-192X
Yu LiState Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.ORCID https://orcid.org/0000-0001-8578-7268

Funding

National Natural Science Foundation of China 82371003
6 · The paper itself

Abstract

backgroundThis study sought to thoroughly assess the skeletal impacts of Class II elastics therapy on the developing mandible, highlighting three-dimensional changes in its functional units.

methodsTreatment records of 140 CBCT scans from 70 adolescent patients were retrospectively collected and assigned to one of two groups: the Class II elastics group (n = 35), in which class II elastics were performed on the stainless steel archwires for more than 12 months, and the control group (n = 35). Pre- and post-treatment cone beam computed tomography (CBCT) images were used to assess changes related to the skeletal facial pattern, functional units, and transverse parameters. An independent t-test was used to compare between the two groups.

resultsIn the Class II elastics group, the mandibular body unit length (IAF-MF) increased by 3.09 ± 3.16 mm from pre- to post-treatment, significantly larger than that in the control group (1.37 ± 3.14 mm). No other mandibular functional unit or transverse parameters demonstrated significant differences between the two groups.

conclusionsBased on the single-center sample included in this study, the adolescent group receiving prolonged Class II elastics may have exhibited a greater increase in mandibular body unit length compared to the group with minimal elastic use. However, these findings cannot be generalized without further validation.

Indexed as

Malocclusion, Angle Class IIMandibleAdolescentCephalometryCone-Beam Computed TomographyFemaleHumansMaleOrthodontic Appliance DesignOrthodontic WiresRetrospective Studiesadolescent orthodonticsCBCTclass II elasticsgrowth modificationmandibular functional unit

Identifiers

PMID42029001
PMCPMC13543191

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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.