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[Establishment of two-dimensional magnetic field finite element analysis model of cup-yoke-type magnetic attachment].

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2002 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3837

A two-dimensional finite element model (1/2 section) was used to calculate Maxwell stress and derive attractive force between a magnet and keeper in a cup-yoke-type magnetic attachment. The calculated attractive force reflected the trend of variable factors a…

Study snapshot

PublicationHua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2002
Study typeengineering
Reported directionUnclear
Evidence ratingInsufficient

Abstract

OBJECTIVE: The purpose of this study was to establish two-dimensional magnetic field finite element analysis model of cup-yoke-type magnetic attachment for optmizing the design of magnetic attachments. METHODS: Because the magnetic field of cup-yoke-type magnetic attachment is stable axial-symmetrical, the authors only analyzed two-dimensional magnetic field of 1/2 section. The Maxwell stress between magnet and keeper was integral analyzed using the finite element method, and the attractive force between magnetic attachments was obtained. RESULTS: Compared the value of calculated attractive force with that of examined, the authors found that the procedure veritably reflected influencing trend of variable factors on attractive force, and the value of former one was 10% less than the later one. CONCLUSION: This procedure can be used in magnetic field calculation of cup-yoke-type magnetic attachments.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering
Effect directionunclear
PopulationNot supplied
Sample sizeNot supplied
ExposureNot supplied
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

A two-dimensional finite element model (1/2 section) was used to calculate Maxwell stress and derive attractive force between a magnet and keeper in a cup-yoke-type magnetic attachment. The calculated attractive force reflected the trend of variable factors and was about 10% lower than the examined value.

Outcomes measured

  • Calculated attractive force between magnet and keeper (finite element analysis)
  • Agreement between calculated and examined attractive force

Limitations

  • No frequency, field strength, or exposure metrics reported
  • No biological/health outcomes assessed (engineering/modeling study)
  • Sample size and details of the examined/measurement method not described in the abstract
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "magnetic attachment (cup-yoke-type)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Calculated attractive force between magnet and keeper (finite element analysis)",
    "Agreement between calculated and examined attractive force"
  ],
  "main_findings": "A two-dimensional finite element model (1/2 section) was used to calculate Maxwell stress and derive attractive force between a magnet and keeper in a cup-yoke-type magnetic attachment. The calculated attractive force reflected the trend of variable factors and was about 10% lower than the examined value.",
  "effect_direction": "unclear",
  "limitations": [
    "No frequency, field strength, or exposure metrics reported",
    "No biological/health outcomes assessed (engineering/modeling study)",
    "Sample size and details of the examined/measurement method not described in the abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "finite element method",
    "magnetic field",
    "Maxwell stress",
    "magnetic attachment",
    "cup-yoke-type",
    "attractive force",
    "dental prosthodontics"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: 12607373

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