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Secondary aesthetic restoration of tetracycline-stained teeth with incongruous gingival margins by digitally guided precision crown lengthening: a case report and literature review
LING Huiling, SUN Jiyu, REN Wei, YUE Li, RUAN Yifeng, QIN Ziqi, GAN Xueqi
Journal of Prevention and Treatment for Stomatological Diseases . 2025, (9): 784 -791 .  DOI: 10.12016/j.issn.2096-1456.202550069