In vitro evaluation of force-expansion characteristics in a newly designed orthodontic expansion screw compared to conventional screws | Zendy

Morteza Oshagh | Zendy; Shahla Momeni Danaei | Zendy; M R Hematian | Zendy; MR Oshagh | Zendy; A. Hadiun Zade | Zendy; Aa. Saboori | Zendy

Open Access

In vitro evaluation of force-expansion characteristics in a newly designed orthodontic expansion screw compared to conventional screws

Author(s) -

Morteza Oshagh,

Shahla Momeni Danaei,

M R Hematian,

MR Oshagh,

A. Hadiun Zade,

Aa. Saboori

Publication year - 2009

Publication title -

indian journal of dental research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.277

H-Index - 43

eISSN - 1998-3603

pISSN - 0970-9290

DOI - 10.4103/0970-9290.59447

Subject(s) - materials science , hyrax , orthodontics , compression (physics) , universal testing machine , composite material , dentistry , biomedical engineering , medicine , ultimate tensile strength

Expansion screws like Hyrax, Haas and other types, produce heavy interrupted forces which are unfavorable for dental movement and could be harmful to the tooth and periodontium. The other disadvantage of these screws is the need for patient cooperation for their regular activation. The purpose of this study was to design a screw and compare its force- expansion curve with other types.

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