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Related Experiment Videos

Interchangeability of a semiadjustable articulator.

C C Chung, J Chai, L M Jameson

    The International Journal of Prosthodontics
    |June 18, 2002
    PubMed
    Summary

    Most new Hanau semi-adjustable articulators meet mediolateral interchangeability criteria, but few meet 3D criteria. Articulators may maintain interchangeability for 18 months, but clinicians should note potential occlusal errors up to 0.2 mm.

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    Area of Science:

    • Dental occlusion and prosthodontics
    • Mechanical engineering in dental devices

    Background:

    • Semi-adjustable articulators are crucial for simulating patient occlusion in dental laboratories.
    • Ensuring interchangeability of articulators is vital for consistent and accurate dental restorations.
    • Manufacturer criteria for articulator performance, such as spatial deviation limits, guide device selection and use.

    Purpose of the Study:

    • To evaluate if new Hanau semi-adjustable articulators meet manufacturer criteria for mediolateral (102 microns) and 3D (166 microns) interchangeability.
    • To determine if articulator interchangeability is maintained after 18 and 30 months of functional use.

    Main Methods:

    • Spatial deviations of 30 Hanau articulators (10 new, 10 aged 18 months, 10 aged 30 months) were measured using a field-inspection gauge.

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  • Measurements were compared against a master articulator to assess interchangeability.
  • Analysis included mediolateral and three-dimensional deviations.

    • Main Results:

    • Nine out of ten new articulators met the mediolateral interchangeability criterion.
    • Only four out of ten new articulators met the three-dimensional interchangeability criterion.
    • While interchangeability was observed among groups at a specific point, the 30-month group showed significant deviations compared to new and 18-month groups.

    Conclusions:

    • Most tested articulators met mediolateral, but not three-dimensional, interchangeability standards.
    • Clinicians should be aware of potential occlusal errors (around 0.2 mm) when interchanging dental casts on this articulator system.
    • The Hanau articulator system may retain interchangeability for up to 18 months of regular use.