Effects on Maxillary Anterior Dentition Following En Masse Retraction Using Mini-implants and Various Heights of Anterior Power Arm.
- Conditions
- Varying Heights of Power Arm During en Masse Retraction
- Interventions
- Other: Anterior Power Arm
- Registration Number
- NCT04184427
- Lead Sponsor
- Dow University of Health Sciences
- Brief Summary
The controlled three dimensional movement of anterior dentition during orthodontic treatment is a desire of every orthodontist. Maxillary en masse retraction with mini implants has been reported to provide absolute anchorage thus utilizing the complete extraction spaces thereby enhancing patient's esthetics. Power arm or anterior retraction hook permits the application of force close to a desired direction thereby warranting better anterior dentition control. Various heights of power arms and proposed centre of resistance for six maxillary anterior teeth have been estimated through finite element model and also from a very limited number of clinical studies. For a set of teeth, the determination of centre of resistance is complex in actual clinical scenario and response of force applied from certain level for better anterior dentition control requires sufficient clinical evidence suggestive of further clinical studies to endow orthodontists to hasten treatment due to less time consumption during finishing stage of orthodontic treatment.
- Detailed Description
This Randomized Control Trial will be conducted to compare the effects of various heights of anterior power arm on maxillary anterior dentition following en masse retraction with mini-implants by participation of thirty patients meeting eligibility criteria. The participants will be divided in three groups through software generated randomization table. Group I (control group; height of anterior power arm 6 mm), Group II and Group III (experimental groups; height of anterior power arm 3 mm and 9 mm, respectively). Ten patients will be allocated in each group. En masse retraction with mini implants and various heights of anterior power arm will be carried out immediately after bilateral maxillary first premolar extractions using continuous arch sliding mechanics. Horizontal, vertical and angular dimensions will be measured on lateral cephalograms while the transverse effects will be measured on maxillary dental cast. Both lateral cephalograms and dental casts will be obtained at two different point of time; T1, before retraction and T2, after complete extraction space closure. The data will be assessed with-in and among groups.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 30
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Group II Anterior Power Arm 3 mm height of power arm Group I Anterior Power Arm 6 mm height of power arm Group III Anterior Power Arm 9 mm height of power arm
- Primary Outcome Measures
Name Time Method Change in maxillary central incisor sagittal dimension Upto 1 year IoSV (mm), IaSV (mm), IaSV/IoSV
Change in maxillary central incisor vertical dimension Upto 1 year IoPP (mm), IaPP (mm)
Change in maxillary central incisor angular dimension Upto 1 year I-angle (degrees)
Change in maxillary anterior transverse dimension Upto 1 year Intercanine width (mm)
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Department of Orthodontics , DIEKIOHS, Dow University Of Health Sciences, Ojha Campus.
🇵🇰Karachi, Sindh, Pakistan