Prevalence of the second mesiobuccal canal of maxillary molars in the South American population: a systematic review and meta-analysis of CBCT studies - Kevin José Poclin-Quispe; Heber Isac Arbildo-Vega; Fray L. Becerra-Suarez; Gabriel Guerra-Gonzales; David Yeret Rodríguez-Salazar; Franz Tito Coronel-Zubiate (Frontiers in Dental Medicine, 2026)