title: Removable molar power arm.
abstract: Attachment of force elements from the gingival hook of maxillary molar tubes during the retraction of the anterior teeth is very common in orthodontic practice. As the line of force passes below the center of resistance (CR) of molar, it results its mesial tipping and also anchorage loss. To overcome this problem, the line of force should pass along the CR of molar. This article highlights a method to overcome this problem by attaching a removable power arm to the headgear tube of molar tube during the retraction of the anterior teeth.
authors.affiliation: Unit of Orthodontics, Oral Health Sciences Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
authors.forename: Raj Kumar
authors.initials: RK
authors.lastname: Verma
authors.forename: Ashok Kumar
authors.initials: AK
authors.lastname: Jena
authors.forename: Satinder Pal
authors.initials: SP
authors.lastname: Singh
authors.forename: Ashok Kuamr
authors.initials: AK
authors.lastname: Utreja
keywords: Biomechanics; molar power arm; orthodontics