Correction of Class II Skeletal Malocclusion with an Infra-Zygomatic Crest Bone Screw Approach Yezdani A. Arif1,*, Chatterjee Priya2, Kumar S. Kishore3, Padmavathy Kesavaram4 1Professor & Director, Department of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India 2Department of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India 3Vice Principaland Assistant Director (R&D), Department of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India 4Associate Professor, Department of Microbiology, Research Laboratory for Oral-Systemic Health, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India *Corresponding Author: Dr. A. Arif Yezdani, MDS, FWFO, Professor & Director, Dept. of Orthodontics and Dentofacial Orthopaedics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai-600100, Tamil Nadu, India, Email: arifyezdani@yahoo.com
Online published on 4 April, 2020. Abstract Introduction This case report describes the treatment of a Class II skeletal malocclusion with a prognathic maxilla and retrognathic mandible with severely proclined maxillary incisors and lingually blocked mandibular right lateral incisor withentire maxillary arch distalization and use ofinfra-zygomatic crest bone screws devoid of extraction of premolars. Method Treatment involved strap-up of a pre-adjusted edgewise appliance, MBT technique (0.022 X 0.028-inch slot). A non-extraction approach was recommended despite the case warranted premolar extractions. Infra-zygomatic bone screws of length 14mm and diameter 2mm was used for the distalization of the entire maxillary arch. The case was assessed at start of orthodontic treatment (T1) and end of orthodontic treatment (T2). Results At T2, the severe pre-maxillary prognathism and mandibular anterior crowding with lingually locked right lateral incisor was corrected with the canines and molars finished in Class I relationship. Normal overbite and overjet with a pleasing soft tissue profile was satisfactorily achieved. Conclusion Infra-zygomatic bone screws can be effectively used as absolute skeletal anchorage to correct Class II skeletal discrepancy with maxillary prognathism and severe proclination of maxillary incisorsdevoid of premolar extractions. Top Keywords Infra-zygomatic bone screw, skeletal Class II discrepancy, maxillary arch distalization, skeletal anchorage. Top |