Abstract: Objective: To evaluate the clinical performance of metal wing lingual retainer. Methods: Twelve patients after orthodontic treatment were selected. Six patients used the lingual retainer of cobalt-chromium alloy wing printed by laser fusion technology, and 6 patients used the lingual wire fixed retainer. All the retainers were bonded to the mandibular teeth by resin adhesive. The bonding operative time were recorded, and the retainer retention and deformation, dentition retention, periodontal health index, and comfort were evaluated at 1, 3, and 6 months after bonding. Results: The chair-side time of metal wing group (5.27±2.58) min was shorter than that of lingual wire group (10.07±2.71 min, P<0.05). The retention and deformation, dentition retention, periodontal health index, and Comfort Index of metal wing group were better than that of lingual wire group (P＜0.05). Conclusion: Metal wing lingual retainer printed by laser fusion technique could meet the clinical requirements.

Key words: tongue-side retainer, cobalt-chromium alloy, laser melting technology