Summary Table Bone Type Location Composition Tactile Feel Implant Considerations D1 Anterior mandible Dense cortical bone Like hardwood (oak/maple) Risk of overheating, slow osseointegration D2 Post. mandible, ant. maxilla Thick cortical + dense cancellous Like white pine Ideal bone; excellent stability D3 Ant. maxilla, post. mandible Thin cortical + porous cancellous Like balsa wood Moderate stability; longer healing time D4 Posterior maxilla Very thin cortical + low-density cancellous Like Styrofoam Poor stability; may need grafting