What is the definition of Overbite?

Overbite is defined as the vertical overlap of the upper and lower incisors when the teeth are in occlusion, meaning when the upper and lower teeth come together during biting or chewing. This definition is critical in understanding dental alignment and the functional aspects of the bite. A certain degree of overbite is normal, but excessive overbite can lead to issues such as tooth wear, jaw discomfort, and even orthodontic concerns.

In dentistry, the measurement of overbite is important for diagnosing malocclusions and planning appropriate treatment. Adequate knowledge of this concept helps dental professionals understand how the alignment of teeth affects overall oral health.

The other options address different dental concepts. The first choice discusses the horizontal distance between incisors, which pertains more to overjet rather than overbite. The third option relates to the movement of the mandible, which involves jaw dynamics rather than the specific relationship between the upper and lower incisors. Lastly, the fourth choice addresses spacing among the upper premolars, a feature of dental arch shape, rather than the relationship sought in defining overbite. Each of these other definitions focuses on different aspects of dental anatomy and occlusion that are unrelated to the specific definition of overbite.