EVALUATION OF TREATMENT CHANGES IN CLASS II DIVISION 1 MALOCCLUSION DURING EN MASSE RETRACTION OF UPPER ANTERIOR TEETH USING MINI IMPLANTS PLACED AT INFRAZYGOMATIC CREST AND INTERRADICULAR SITES A RANDOMIZED CLINICAL TRIAL.
MINI IMPLANTS PLACED AT INFRAZYGOMATIC CREST VERSUS INTERRADICULAR SITES A RANDOMIZED CLINICAL TRIAL.
Postgraduate Institute of Dental Sciences Rohtak
30 participants
Oct 1, 2025
INTERVENTIONAL
Conditions
Summary
Rationale: Class II Division 1 malocclusion is characterized by upper anterior teeth protrusion resulting in upper lip protrusion and convex facial profile, which are considered esthetically unfavorable. Treatment of class II malocclusion due to maxillary protrusion can be done with bilateral maxillary first premolar extraction followed by en-masse retraction of upper anterior teeth using mini-implants placed at infrazygomatic or interradicular sites. Aims and Objectives: To evaluate the treatment changes achieved in class II division 1 malocclusion during en- masse retraction of upper anterior teeth using mini-implants placed at infrazygomatic crest versus interradicular sites. To compare patients' and orthodontist's perceptions of treatment being done in both the groups. Method of study: Treatment will be initiated by bilateral maxillary 1st premolar extraction followed by bonding 0.022" slot MBT preadjusted edgewise appliance. Maxillary arch will be stabilized with the help of 0.019"×0.025" stainless steel wire and then randomized allocation of the patients into 2 groups-G1 and G2 will be done. G1 will receive infrazygomatic crest mini-implants bilaterally and G2 will receive bilateral interradicular mini-implants. Hooks will be soldered on archwire used for stabilizing dentition. Ni-Ti closed coil spring will be used to apply force.
Eligibility
Inclusion Criteria5
- Non growing patients
- Bilateral Class II molar relationship at pre-treatment.
- All permanent teeth upto the second molars should be present.
- No or minor crowding in the maxillary arch.
- Horizontal to average growth pattern.
Exclusion Criteria7
- Subjects with a history of fixed orthodontic treatment.
- Crossbite
- Vertical growth pattern
- Any systemic disease affecting bone and general growth
- Poor oral hygiene
- Cleft patients
- Patients who fail to follow up or undergo complete treatment
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Interventions
undergo bilateral extraction of maxillary first premolars before initial leveling and alignment followed by retraction of anterior teeth using mini implants placed at infrazygomatic crest.
bilateral extraction of maxillary first premolars before initial leveling and alignment followed by retraction of anterior teeth using mini implants placed at interradicular sites.
Locations(1)
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NCT07405905