Dental The major objectives of access preparation include all of the following except which one? A The attainment of direct, straight-line access to canal orifices. B The confirmation of clinical diagnosis. C The conservation of tooth structure. D The attainment of direct, straight-line access to the apical portion of the root. 💡 Explanation The major objectives of access preparation include all of the following except which one? ✓ Correct Answer: B. The confirmation of clinical diagnosis.