AI in the Chair: A Multi‐Centre Study of Doctor AI Answering Orthodontic Patient Questions

Objectives: To investigate the performance of Doctor AI in answering frequently asked questions (FAQs) and to analyse the advantages and potential limitations. Methods: Twenty validated FAQs were entered into ChatGPT‐4 and DeepSeek‐v3 to compare the responses generated by the two models and their unmodified responses were assessed by expert panels from English‐, Chinese‐, and bilingual‐speaking institutions. Responses were rated across six dimensions: accuracy, comprehensiveness, detail, relevance, readability, and logic. Results: Both AI models generated high‐quality answers, scoring above 8/10 across all dimensions. ChatGPT outperformed DeepSeek in relevance (9.01 ± 0.33 vs. 8.69 ± 0.42; p = 0.005), while DeepSeek scored higher in comprehensiveness (9.21 ± 0.31 vs. 8.27 ± 0.65; p < 0.001). No significant differences were observed in accuracy, detail, readability, or logic ( p > 0.100 for all). The word counts generated by ChatGPT (243.20 ± 58.27) and DeepSeek (257.35 ± 44.65) across 20 FAQs were similar ( p = 0.223). Conclusions: Doctor AI such as ChatGPT and DeepSeek are capable of delivering high‐quality responses to orthodontic FAQs. ChatGPT may provide more relevant answers, while DeepSeek offers greater comprehensiveness. Combining their outputs may improve patient understanding, but AI‐generated information should supplement, not replace, guidance from qualified orthodontic professionals.