Comparison of Arch Expansion Changes Between Passive Self-ligating and Conventional Brackets
- Conditions
- Orthodontic Appliance Complication
- Interventions
- Device: Orthodontic Brackets
- Registration Number
- NCT03363620
- Lead Sponsor
- CES University
- Brief Summary
The purpose of this randomized controlled clinical trial was to compare the transverse development of the arches and the incisor inclination comparing two different ligating systems (SL vs CL) with the same arch form protocol (Damon arch form) and the same disarticulation protocols after the alignment and leveling period of non-extraction patients.
- Detailed Description
Materials and Methods: Fifty-four subjects were randomly with an electronic randomization program allocated to treatment with either a self-ligating bracket system (Damon Q-slot 0.022", Ormco Corp,) or a conventional bracket system (Orthos-slot 0.022", Ormco Corp). All patients were treated following the same protocol and arch wire sequence: 0.014-inch, 0.018-inch and 0.014x0.025-inch Damon copper nickel-titanium arch wires (Cu-NiTi; Ormco). Lateral cephalograms and study models, taken at prior to treatment (T0) and after alignment and levelling (T1), were used to compare the amount of arch expansion and incisor angulation changes that took place. In the analysis of results in a single observer analyzes the data blindly without knowing which group the patients belonged. Results: Models and cephalograms of the patients and both stages(T0-T1) were measured at the data were analyzed in STATA S.E. Treatment produce statistically significant increases in transverse arch dimensions especially in premolars maxillary (2.8-4.3mm) and mandibullary (2.0-4.2mm) of both group. The expansion in the maxillary arch was similar for both groups, but in the mandibular arch was greater in the self ligation group in about 2 mm more. Conclusions: The treatment with self ligation brackets produced more expansion in the mandibular arch than the conventional ligation brackets when used the same arch Damon protocols.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 54
- ANB angle between 0º- 5º
- Systemically and periodontally healthy subjects not taking any medications.
- Maxillary and/or mandibular irregularity index (canine-to-canine) between mild to moderate
- A non-extraction treatment approach.
- Permanent dentition with second molars erupted or in a functional eruptive phase.
- Systemically and periodontally compromise subjects and taking any medications. (2 ) subjects who did not want participate in the investigation
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description conventional brackets orthos ormco® Orthodontic Brackets the conventional bracket (orthos system) in the orthodontic treatment, was used in the active comparator group with the recommended protocol damon arches sequence as used in the experimental group. self ligation brackets damon ormco® Orthodontic Brackets the self ligation bracket (damon system) in the orthodontic treatment, was used in the experimental group with the recommended protocol damon arches sequence.
- Primary Outcome Measures
Name Time Method transverse development of the arches 2 years The maxillary and mandibular widths were measured between the cusp tips of the canines, the buccal cusp tips of the first and second premolars and the mesio-buccal cusp tips of the first molars . They were measured using a digital caliper (Starrett 799A-6/150 Digital Caliper, Athol, Massachusetts, USA) positioned parallel to the occlusal plane.
- Secondary Outcome Measures
Name Time Method incisor inclination 2 years incisor inclination , the maxillary incisors were measured in the lateral cephalogram, relative to the cranial base (U1-SN) and the palatal plane (U1-PP); the mandibular incisor were related to the mandibular plane (L1/Go-Gn) and NB (L1-NB).