- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05963438
Comparison Of En-Masse Retraction With Two-Step Retraction Using Mini-Implant As Anchorage
Comparison Of En-Masse Retraction With Two-Step Retraction Using Mini-Implant As Anchorage - A Randomized Controlled Trial
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Extractions of teeth are the commonest approach in treating orthodontic problems. There is several extraction protocol commonly employed in the orthodontic correction of class II malocclusion ranging from the extraction of two premolars (20.2%) to four premolars (42.9%).
Retraction of anterior teeth followed by the extraction of premolars requires anchorage to restrict the mesial movement of posterior teeth. Anchorage control is a major factor in achieving successful orthodontic treatment and it can be achieved by variety of appliances, of which titanium screws have been considered as an absolute source of anchorage in orthodontics treatment. The anchorage reinforced from mini-implant is helpful in minimizing anchorage loss and accepted heavy traction forces.
Retraction of anterior teeth can be achieved either by en-masse retraction, moving all the six anterior teeth together in a single step or by two-step retraction, separately retract canines in first step followed by retracting the four anteriors in the second step.
This Randomized Control Trial will be conducted to compare the effects of en-masse retraction to two- steps retraction on sagittal, vertical and dental dimensions using mini-implant as anchorage. 80 patients will be included in this study after meeting the eligibility criteria. Each group will contain 40 patients.
The patients will be divided in two groups i.e. two-step retraction group (control group) and en-masse group (experimental group), through software generated randomization table.
Two-step retraction group (control group) In this group, immediately after placement of mini-implant and extractions of upper first premolars, heavy ligation will be done from mini-implant to maxillary second premolar and first molar. Canine will be retracted by sliding mechanics and the four anterior teeth will be retracted by loop mechanics. Loops will be activated every three weeks by 1 mm.
Retraction will be stopped when canines establish class I relationship and a good incisor relationship will be obtained in both the groups
En-masse retraction group(experimental group) After placement of mini-implants and extraction of maxillary first premolar, rectangular stainless steel arch wire with anterior 8mm height crimpable hooks distal to the lateral incisors will be inserted and force will be applied using elastic chains attached between the mini-implant and the hooks for conducting en-masse retraction. Elastic chains will replace after every three weeks.
Pretreatment lateral cepalogram will be taken at time of enrolment (T1) and post-treatment lateral cephalogram taken after 12 months of orthodontic treatment (T2). All cephalometric radiograph will be traced on acetate tracing sheets 0.5 μm in thickness using a sharp 4H pencil on a view box using transilluminated light in a dark room.
The analysis will be done on pretreatment cephalogram (T1) and post treatment lateral cephalogram (T2) and then their measurements will be compared to find out changes in the sagittal, vertical and dental dimensions.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Sindh
-
Karachi, Sindh, Pakistan
- Dow University of Health Sciences
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
1. Both male and female patients with age of 18- 25 years. 2. Cases treated with upper first premolars extractions. 3. Cases having class II molar relation which is mesiobuccal cusp of maxillary first permanent molar occludes anterior to the buccal groove of mandibular first molar on both sides as assessed clinically.
4. Overjet > 5mm and < 12mm as assessed clinically. 5. Cases with no remaining growth as assessed by cervical vertebrae maturation stages (cvm) ≥4 on lateral cephalometric radiograph .
6. Cases with no congenitally missing teeth (excluding third molars).
Exclusion Criteria:
1. Long term use of systemic corticosteroids, calcium channel blockers & anti-inflammatory drugs.
2. Cases with syndromes like cleft lip and palate as assessed clinically. 3. Cases in which active growth is still taking place as assessed by cervical vertebrae maturation stages (cvm) ≤ 3 on lateral cephalometric radiograph.
4. Radiographic evidence of bone loss. 5. Periodontal disease as assessed clinically.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Other: Two-step retraction group (control group)
In this group, immediately after placement of mini-implant and extractions of upper first premolars, heavy ligation will be done from mini-implant to maxillary second premolar and first molar.
Canine will be retracted by sliding mechanics and the four anterior teeth will be retracted by loop mechanics.
Loops will be activated every three weeks by 1 mm.
|
After placement of mini-implants and extraction of maxillary first premolar, retraction of anterior either simultaneously or separately depending on the allocated group will be done
|
Experimental: En-masse retraction group(experimental group)
After placement of mini-implants and extraction of maxillary first premolar, rectangular stainless steel arch wire with anterior 8mm height crimpable hooks distal to the lateral incisors will be inserted and force will be applied using elastic chains attached between the mini-implant and the hooks for conducting en-masse retraction.
Elastic chains will replace after every three weeks
|
After placement of mini-implants and extraction of maxillary first premolar, retraction of anterior either simultaneously or separately depending on the allocated group will be done
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
To compare sagittal, vertical and dental dimensions following en-masse retraction with two-step retraction using mini-implants as anchorage.
Time Frame: Pretreatment lateral cepalogram will be taken at time of enrolment (T1) and post-treatment lateral cephalogram taken after 12 months of orthodontic treatment (T2).
|
Pretreatment lateral cepalogram will be taken at time of enrolment (T1) and post-treatment lateral cephalogram taken after 12 months of orthodontic treatment (T2).
|
Collaborators and Investigators
Investigators
- Principal Investigator: Anam Sattar, FCPS, Dow University of Health Sciences
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Estimated)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 2681
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
IPD Sharing Time Frame
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- CSR
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on En-masse Retraction to Two- Steps Retraction
-
Cairo UniversityUnknownEn-masse Retraction , Class I Bimaxillary Protrusion
-
Dow University of Health SciencesCompletedVarying Heights of Power Arm During en Masse RetractionPakistan
Clinical Trials on anterior retraction
-
Dow University of Health SciencesCompletedVarying Heights of Power Arm During en Masse RetractionPakistan
-
Beni-Suef UniversityActive, not recruiting
-
Rio de Janeiro State UniversityCoordenação de Aperfeiçoamento de Pessoal de Nível Superior.UnknownBimaxillary Protrusion | Malocclusion, Angle Class I | Orthodontic Space ClosureBrazil
-
Future University in EgyptCompleted
-
Damascus UniversityCompletedClass II Division 1 MalocclusionSyrian Arab Republic
-
Dr. Tarit SahaCompleted
-
Future University in EgyptActive, not recruitingBimaxillary ProtrusionEgypt
-
Future University in EgyptCompletedBimaxillary ProtrusionEgypt
-
Future University in EgyptCompletedBimaxillary Protrusion | Class III Malocclusion | Crowding, Tooth | Class II MalocclusionEgypt
-
Dow University of Health SciencesActive, not recruitingAmount of Root Resorption of Maxillary Anteriors After en Masse Versus Two Step Space Closure (CBCT)Root ResorptionPakistan