Abstract: Center of resistance (CR) has been widely accepted in dentistry as a reference point for controlling tooth moment, which depends on the direction of loading and the morphology of the periodontal ligament (PDL). In clinical ...

Abstract: Abstract. Premolar extraction is often used in clear aligner (CA) therapy for teeth retraction. However, concerns such as anchorage loss leave clinicians divided on its drawbacks. This study aims to investigate the effect ...