Evaluation of Two Arch Designs for Orthodontic Intrusion and Retraction of Teeth

Authors: Surg. Cdr. (D) Sukhbir Singh Chopra, M.D.S. Classified Specialist, (Orthodontics) Research Pool O ffi cer, Armed Forces Medica l College, Pune 411 040. Mobile +91 -8055 182502 I.andl ine 26306023 E-mail : [email protected] Col. Rajat Mitra, M.D.S. Associate Professor, (Orthodontics) Armed Forces Medical College, Pune. Maj. Dinesh Chaudhary, B.D.S. Resident (Orthodontics) Armed Forces Medical College, Pune. Maj. Atul Bali, B.D.S. Resident (Orthodontics) Armed Forces Medica l College, Pune. Background: Simultaneous intrusion and retraction of the anterior teeth is desirable to achieve optimum treatment results for orthodontic patients with deep overbite and flared incisors. The present study eva luates two different designs of arches for orthodontic intrusion and retraction of teeth . Methods: Thirty orthodontic patients, divided into two groups having an overbite more than 3 mm and requiring extraction of first premolars were included in the study. Model analysis and cephalometric ana lysis were carried out for each patient. 0.018" Roth prescription brackets were used. One group was treated using Three-piece intrusion arch. Kalra's Simultaneous intrusion retraction arch was used for the other group. On obtaining desired overbite/overjet, the intrusion arches were removed. On accomplishment offinal finishing and detailing, the cases were placed on retention appliance. Result: Chair side time required for fabrication of both intrusion arches was almost similar. Both groups achieved more than 1.9 mm intrusion with minimal effects on the buccal segments. Conclusion: Both the designs of intrusion arch wires used in the present study allow the clinician to deliver a well-controlled force system with minimal chair side adjustments and with no additiona l deleterious effects on the buccal segments.