OBJECTIVE: To compare mesial movement of upper first molars during maxillary canine retraction using a pre-adjusted edgewise appliance provided by anchorage reinforcement and a transpalatal arch or mini-screw implant. DESIGN: Randomized clinical trial. SETTING: Department of Orthodontics and Dentofacial Orthopedics, Armed Forces Medical College, Pune, India. SUBJECTS AND METHODS: From a cohort of subjects requiring the extraction of both upper first premolars and pre-adjusted edgewise appliances to correct their malocclusion, a total of 30 were randomly allocated to receive two different forms of anchorage reinforcement: group A--receiving mini-screw implant and group B--receiving a transpalatal arch Group A subjects received titanium mini-screw implants placed at the start of treatment between the maxillary second premolar and maxillary first molar. Maxillary second premolars were secured to the mini-screw implants using of 0.010-inch stainless steel ligature wire. Group B subjects received a custom-made transpalatal arch which was soldered to maxillary first molar bands. Active canine retraction was initiated in both groups on placement of a 0.019×0.025-inch stainless steel archwire using nickel titanium closed coil springs. OUTCOME MEASURES: Mesial movement of the upper first molars as measured on pre- (T1) and post-treatment (T2) lateral skull radiographs. RESULTS: The results showed that in group A the mean mesial movement of the first molars between T1 and T2 was 0.0 mm (SD 0.02; P = 0.90), whereas in Group B there was a mean forward movement of the first maolars of 2.48 mm (SD 0.71; P<0.001). CONCLUSION: In this trial, mini-screw implants placed prior to levelling and aligning were able to provide absolute anchorage during maxillary canine retraction, in contrast to a transpalatal arch.
RCT Entities:
OBJECTIVE: To compare mesial movement of upper first molars during maxillary canine retraction using a pre-adjusted edgewise appliance provided by anchorage reinforcement and a transpalatal arch or mini-screw implant. DESIGN: Randomized clinical trial. SETTING: Department of Orthodontics and Dentofacial Orthopedics, Armed Forces Medical College, Pune, India. SUBJECTS AND METHODS: From a cohort of subjects requiring the extraction of both upper first premolars and pre-adjusted edgewise appliances to correct their malocclusion, a total of 30 were randomly allocated to receive two different forms of anchorage reinforcement: group A--receiving mini-screw implant and group B--receiving a transpalatal arch Group A subjects received titanium mini-screw implants placed at the start of treatment between the maxillary second premolar and maxillary first molar. Maxillary second premolars were secured to the mini-screw implants using of 0.010-inch stainless steel ligature wire. Group B subjects received a custom-made transpalatal arch which was soldered to maxillary first molar bands. Active canine retraction was initiated in both groups on placement of a 0.019×0.025-inch stainless steel archwire using nickel titanium closed coil springs. OUTCOME MEASURES: Mesial movement of the upper first molars as measured on pre- (T1) and post-treatment (T2) lateral skull radiographs. RESULTS: The results showed that in group A the mean mesial movement of the first molars between T1 and T2 was 0.0 mm (SD 0.02; P = 0.90), whereas in Group B there was a mean forward movement of the first maolars of 2.48 mm (SD 0.71; P<0.001). CONCLUSION: In this trial, mini-screw implants placed prior to levelling and aligning were able to provide absolute anchorage during maxillary canine retraction, in contrast to a transpalatal arch.
Authors: Safa Jambi; Tanya Walsh; Jonathan Sandler; Philip E Benson; Richard M Skeggs; Kevin D O'Brien Journal: Cochrane Database Syst Rev Date: 2014-08-19
Authors: Marco Migliorati; Lucia Cevidanes; Giordana Sinfonico; Sara Drago; Domenico Dalessandri; Gaetano Isola; Armando Silvestrini Biavati Journal: Head Face Med Date: 2021-01-15 Impact factor: 2.151