Question

Spherical alloys require _____ mercury to wet the particles and generally set _____ than lathe-cut particles.

a) More, faster
b) Less, faster
c) More, slower
d) Less, slower

Answer 1

Spherical alloys in dental amalgams require less mercury for wetting and set faster than lathe-cut particles due to increased surface area facilitating quicker reactions. Option b.

Step-by-step explanation:

The student's question is related to the wetting and setting properties of spherical alloys used in dental amalgams. Spherical alloys typically require less mercury to wet the particles because of their shape and surface area.

Additionally, they generally set faster than lathe-cut particles as a result of increased surface area which allows for a quicker reaction with mercury. This concept relates to reaction surface area and kinetics.

A larger surface area, such as that of spherical particles, leads to more effective contact between reactants and hence a faster rate of setting. Option b.