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

• Main Authors: Oshagh Morteza (Author), Momeni Danaei S (Author), Hematian M (Author), Oshagh M (Author), Zade A (Author), Saboori A (Author)
• Format: Book
• Published: Wolters Kluwer Medknow Publications, 2009-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

<b>Objective</b> : 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 regula...