This document discusses factors to consider when selecting posterior teeth for dentures, including size, form, and shade. It describes choosing teeth that are the appropriate buccolingual width, mesiodistal length, and occlusogingival height to fit the patient's arch. The form of teeth should match the patient's condylar inclination, ridge height and age. Anatomic, semi-anatomic, or cuspless teeth may be used depending on the occlusion and jaw relationship. Shade should harmonize with the face and anterior teeth. Acrylic teeth are generally used for single maxillary dentures opposing natural teeth due to limited interarch space, while porcelain can provide better aesthetics but is not used opposing