Which approach best describes guided access cavity design to preserve tooth structure while ensuring canal visibility?

• A. Remove as much tooth structure as possible to ensure visibility
• B. Use only conventional straight-line access without imaging
• C. Use a laser to disrupt dentin and locate canals
• D. Use preoperative imaging to map canal locations, plan minimally invasive osteotomy, maintain dentin walls, use a high-speed round bur to create initial alignment and straight-line path to canals

Answer: (D)