Case report
Comprehensive Management of Skeletal Class II Division 1 Malocclusion with Bilateral Crossbite using Haas Expander and ForsusTM FRD: A Case Report
Correspondence Address :
Dr. K Aathira Surendran,
Postgraduate Student, Department of Orthodontics and Dentofacial Orthopaedics, Datta Meghe Institute of Higher Education and Research, Sawangi (Meghe), Wardha-442004, Maharashtra, India.
E-mail: aathirasurendrank@gmail.com
Skeletal Class II malocclusion is a jaw discrepancy where the mandible is retruded relative to the maxilla, leading to a convex profile, increased overjet, and potential deep bite. It may result from mandibular deficiency, maxillary excess, or both. This case report details the comprehensive management of a 19-year-old male patient with a Class II Division 1 malocclusion, characterised by an orthognathic maxilla, retrognathic mandible, increased overjet and overbite, and a convex facial profile. The treatment involved fixed orthodontic therapy using the McLaughlin-Bennett-Trevisi (MBT) 0.022” prescription for comprehensive tooth alignment and leveling. Maxillary expansion was achieved using a Haas expander, a tooth- and tissue-borne appliance designed to widen the upper arch. Class-II correction was carried out with the ForsusTM Fatigue Resistant Device (FRD), a Fixed Functional Appliance (FFA) that applies continuous force to advance the mandible and correct the sagittal jaw discrepancy. Following two years of active treatment, the patient achieved a well-aligned dentition, a Class I molar and canine relationship, and an improved facial profile. This case highlights the efficacy of FFAs in the non-extraction management of Class II malocclusion, demonstrating favourable dentoalveolar and soft-tissue changes.
Convex profile, Functional appliance, Jaw discrepancy, Molar relationship
DOI: 10.7860/JCDR/2025/79250.22055
Date of Submission: Mar 12, 2025
Date of Peer Review: May 28, 2025
Date of Acceptance: Aug 23, 2025
Date of Publishing: Nov 01, 2025
AUTHOR DECLARATION:
• Financial or Other Competing Interests: None
• Was informed consent obtained from the subjects involved in the study? Yes/No
• For any images presented appropriate consent has been obtained from the subjects. Yes/No
PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: Mar 30, 2025
• Manual Googling: Aug 18, 2025
• iThenticate Software: Aug 20, 2025 (11%)
ETYMOLOGY: Author Origin
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