In dentistry, these terms relate to the relationship of the upper incisors (front teeth) to the lower incisors in either the horizontal or vertical 3-dimensional planes. We refer to this as your Anterior Relationship. During your clinical assessment and examination, our cosmetic dentists will measure this relationship.
This is when the upper incisors are vertically lower or higher than they should be. The ideal overbite range for an average “normal” dentition is 3-5mm.
Sometimes this is expressed as a percentage of the amount of lower incisors that are covered by the upper incisors when looking at the smile (with teeth in full biting position) – normally this should be 20-30%. A normal overbite is when the upper incisors are in front of the lower incisors.
A reverse overbite is when the lower incisors are in front of the upper incisor
This is when the distance between the upper incisors and lower incisors horizontally is more or less than they should be. The ideal overjet range for an average “normal” dentition is 1.5-2.5mm. A normal overjet is when the upper incisors are in front of the lower incisors.
A reverse overjet is when the lower incisors are in front of the upper incisors.
It is important to understand what your main concerns are before we proceed with any advice or treatment planning. For this reason, we recommend an initial consultation to discuss a way forward. We offer these initial consultations at no cost to you.
Classification of dental relationship dependent on overjet and overbite relationships:
The ideal ratio between overjet to overbite should be 1:2. This is the most common relationship seen.
Class II div 1
There is an increase in overjet and normal overbite. This is the second most common relationship seen in patients.
Class II div 2
There is an increase in overbite and the front teeth are often retroclined. This look is often said to look attractive. There is often a deep bite and also a restricted bite that causes tooth wear on the front of lower teeth and back of upper teeth.
This occurs when the overjet less than 0 mm or when the overjet is in reverse. The overbite is often minimal.
The treatment to correct overjet and overbite is primarily with orthodontics. On some occasions, smile makeovers can help improve aesthetics.