Lip repositioning with crown lengthening as an alternative to excessive gingival exposure: Clinical case von Alvarado, MDS Lizeth Alejandra Reyes, Quiñones, DS Alma Viridiana Castro, Santamaría, MDS María de los Ángeles Pietschmann, Arzola, MDS Martha Margarita Aguado, Trujillo, DBS Dora María López, Ramírez, DS Julissa Ramírez, Balderrama, Israel Abisai del Rio

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