oral surgery card 125 part 1 (Parathyrid Hormone Regulates Calcium Levels in the Blood)By Hiba Al-Shawa / July 21, 2021 Back to: Oral Surgery Mnemonics Previous Lesson OS Card 124 (Anatomic Distribution of Mandibular Fractures: Most to Least) Lesson 1 within section Oral Surgery – Fractures. Next Lesson oral surgery card 125 part 2 (Chvostek and Trousseau Signs are Seen in Hypocalcemia) Lesson 2 within section Oral Surgery – General Information. You must enroll in this course to access course content.