Digital Commons Network^™

Comparison Of Resistance To Sliding In Posterior Units With Various Angulations Of Molar Tubes, Pornhathai Liewsaitong, Paiboon Techalertpaisarn

Chulalongkorn University Dental Journal

Background/objectives This study aimed to investigate the effect of one or two brackets on orthodontic frictional forces and to compare frictional forces of posterior segments when a molar tube had different degrees of tipping. Materials and Methods Five different types of posterior segment templates with six templates per type were constructed. Templates A and B had one and two brackets with an untipped tube, respectively. Templates C, D, and E had two brackets and a 3°, 6° or 9° tipped tube. Each template was coupled with 0.016″ x 0.022″ stainless steel wire and ligated with elastomeric ligatures. Static frictions were …