Each arch is separated into two ___.

Each arch is separated into two ___.

• A. Hemispheres
• B. Segments
• C. Sectors
• D. Quadrants

Answer: (D)

Dividing the dental arches into quadrants is the standard way to organize the teeth for charting and treatment planning. Each arch (upper and lower) is split down the middle into left and right halves, giving four quadrants in the mouth: upper right, upper left, lower right, and lower left. This system helps consistently reference specific groups of teeth and coordinate workflows in labs and clinics. Terms like hemispheres, segments, or sectors aren’t the established divisions used for this purpose, so the term that fits the common dental terminology is quadrants.

Dividing the dental arches into quadrants is the standard way to organize the teeth for charting and treatment planning. Each arch (upper and lower) is split down the middle into left and right halves, giving four quadrants in the mouth: upper right, upper left, lower right, and lower left. This system helps consistently reference specific groups of teeth and coordinate workflows in labs and clinics. Terms like hemispheres, segments, or sectors aren’t the established divisions used for this purpose, so the term that fits the common dental terminology is quadrants.