ALTERATIONS IN BONE, TEETH, AND SOFT TISSUE ON LATERAL CEPHALOGRAMS FOLLOWING ORTHOGNATHIC SURGERY IN PATIENTS WITH CLASS II SKELETAL DISCREPANCIES

Thị Mận Nguyễn, Thị Thu Phương Nguyễn, Cao Bính Trần

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Abstract

Objective: To outline the alterations in hard and soft tissues observed on lateral cephalograms following orthognathic surgery in patients with Class II skeletal malocclusion. Research subjects and methods: Between January 2021 and August 2024, 31 pairs of lateral cephalometric radiographs were obtained from patients at the National Hospital of Odonto-Stomatology in Hanoi, diagnosed with Class II skeletal malocclusion and indicated for orthognathic surgery. A combined retrospective and prospective case series study was conducted to evaluate changes before and after the intervention. Results: Of the patients, 23 were female, making up 74.2%, which is 2.9 times the number of male patients (8, or 25.8%). The most common causes were mandibular retrusion (41.9%) and maxillary protrusion (38.7%), with the combination of maxillary protrusion and mandibular retrusion being the least common (19.4%). Following surgery, 66.7% of the skeletal, dental, and soft tissue indices analyzed in the study demonstrated statistically significant improvements, moving closer to normal values (P < 0.05). Conclusion: Class II skeletal discrepancies indicated for orthognathic surgery were primarily due to mandibular retrusion (41.9%) and maxillary protrusion (38.4%). Post-surgery, changes were noted in skeletal, dental, and soft tissue structures, with 66.7% of the indices falling within normal limits, showing statistical significance (p < 0.05)

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