Which of the following are the most frequently injured primary teeth?

The most frequently injured primary teeth are the incisors. This is primarily because primary incisors are located at the front of the mouth and are more susceptible to trauma from falls, accidents, or activities that involve contact, such as sports or rough play. As children are often more active and prone to falls, the anterior teeth naturally experience a higher incidence of injury compared to other types of teeth.

Additionally, primary incisors have relatively less enamel and thinner dentin compared to permanent teeth, making them more vulnerable to damage. The location and characteristics of these teeth contribute significantly to their higher frequency of injury in children, as they often serve as the primary biting and cutting instruments for young children during the early years of development.