Dental General 364a26d3 Buccal shelf area is the primary stress bearing area in mandibular edentulous ridge because: A It is covered with cortical bone which is usually at right angles to occlusal forces. B It is covered with spongy bone which is usually at right angles to occlusal forces. C Least forces are there. D Keratinized mucosa over the ridge makes it resistant to occlusal forces. High-Yield Explanation No explanation provided.