Evidence map›Paper›PMID 40442631›Full record

ArticleBMC oral health2025

Biomechanical analysis on mandibular anterior teeth during unilateral mandibular molar Protraction with different movement patterns: a finite element analysis.

Haoting Wu, Chenzhi Li, Lirong Dong, Xibei Li, Xingyu Li, Wenli Huang, Shaoyang Yu, Qiang Zhang, Xiao Yan, Xiao Yuan

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In one paragraph

Article in BMC oral health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
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2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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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3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

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4 · The record

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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

10 authors.

Haoting WuDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Chenzhi LiDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Lirong DongDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Xibei LiDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Xingyu LiDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Wenli HuangDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Shaoyang YuDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Qiang ZhangDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Xiao YanDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China.
Xiao YuanDepartment of Orthodontics, The Affiliated Hospital of Qingdao University, Haier Rd No. 59, Qingdao, 266003, China. yuanxiaoqd@qdu.edu.cn.

Funding

National Natural Science Foundation of China No. 32171303
6 · The paper itself

Abstract

objectivesTo evaluate the biomechanical effects on mandibular anterior teeth during second molar protraction using different movement patterns following unilateral mandibular first molar loss. MATERIALS AND

methodsA 3D finite element model was developed to simulate unilateral mandibular first molar absence. Three protraction movement patterns were studied: (A) traction hook, (B) anchorage screw, and (C) anchorage screw with extended arm. A 2 N traction force was applied with an archwire-bracket friction coefficient of 0.2. Tooth displacement and movement direction were analyzed.

resultsAll three movement patterns affected mandibular anterior teeth differently. The traction hook method showed minimal influence on both anterior teeth and molar displacement. The anchorage screw method demonstrated improved protraction but caused significant displacement of anterior teeth away from the edentulous site and pronounced labial inclination. Adding an extended arm reduced labial inclination and enhanced intrusion of anterior teeth while increasing molar displacement, however, anterior dental movement away from the edentulous site is notably increased.

conclusionsAdverse effects on anterior teeth are inevitable during mandibular second molar protraction, regardless of the space closure technique employed. The traction hook produced minimal displacement overall. The anchorage screw with extended arm effectively reduced anterior teeth labial inclination while enhancing molar protraction, though careful attention to midline control is necessary.

Indexed as

CuspidFinite Element AnalysisIncisorMolarTooth Movement TechniquesBiomechanical PhenomenaBone ScrewsComputer SimulationDental Stress AnalysisFrictionHumansImaging, Three-DimensionalMandibleOrthodontic Anchorage ProceduresOrthodontic BracketsOrthodontic Space ClosureAnchorage reinforcementFinite element analysisMolar protractionOrthodontic space closureTeeth biomechanical effects

Identifiers

PMID40442631
PMCPMC12123848

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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.