1318. The incisal edges and the incisal thirds of facial surfaces of mandibular incisors and canines generally oppose lingual surfaces of maxillary incisor and canines _____________? September 27, 2025 by Admin A. Within the incisor thirds B. At the junction of middle and cervical thirds C. At the linguo cervical ridges D. Immediately incisal to cingulam ✅ The correct answer is option A. Within the incisor thirds.