Abstract: Objective To assess function and facial appearance after instant rehabilitation of BrownⅡmaxilla defect with digital prosthesis. Methods Due to tumor resection, 10 patients with BrownⅡmaxilla defect were treated with prosthesis from August, 2016 to August, 2017 in operation. The speech intelligibility, swallowing function, masticatory function and facial symmetry were evaluated 1 month, 3 months and 6 months after operation. Results Speech intelligibility was improved significantly via prosthesis rehabilitation 1 month, 3 months and 6 months after operation (P=0.004, 0.015, 0.001, P<0.05). The effective rate and apparent rate of swallowing were respectively 25% (2/8) and 75% (6/8). The skewed degree of mouth corner, the difference of bilateral lip height, the maximum deviation distance and the change area volume decreased significantly (P=0.007, 0.044, 0.039, 0.042, P<0.05). The ratios of biting force were (20.45±2.55)% and (79.55±2.55)% in affected and normal sides. Asymmetric index of biting force was (59.10±5.09)%. Biting force in affected side was recovered to (25.82±4.04)%. Conclusion Digital prosthesis can repair Brown maxillaⅡdefect in surgery with excellent rehabilitation of facial appearance and function.

Key words: Digital, Prosthesis, Instant rehabilitation, Brown II defect, Functional evaluation