Open AccessIn vitroevaluation of force-expansion characteristics in a newly designed orthodontic expansion screw compared to conventional screws
Author(s) -
Morteza Oshagh,
Shahla Momeni Danaei,
Hematian Mr,
Oshagh Mr,
Zade Ah,
Aa. Saboori
Publication year - 2009
Publication title -
indian journal of dental research/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 , orthodontics , universal testing machine , compression (physics) , hyrax , spring (device) , composite material , dentistry , structural engineering , medicine , ultimate tensile strength , engineering
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.