What is a standard bite? How to recognize correct bite through a mirror

What is occlusion?

Occlusion is the relationship between the teeth of the two jaws when they are in contact with each other in a resting state or functional state of the jawbone.

There are two types of occlusion: static occlusion and dynamic occlusion. When we refer to “standard bite” or “malocclusion” in orthodontics, we understand that this is a static bite, meaning that bite is formed when the two jaws bite tightly together.        

What is a standard occlusion?

A standard occlusion or ideal occlusion is the harmony of the relationship between the teeth of the two jaws in both static and dynamic states, helping to bring about good aesthetics and function of the teeth.

In 1887, doctor Edward Angle first identified 3 types of jaw relationship, which includes the definition of standard occlusion - also known as class I occlusion.

Occlusion is correct. Classification is based on the relationship between the first molar (or tooth number 6) in the two jaws, or if tooth number 6 is missing or not eligible for evaluation, the bite will be classified according to the relationship between the canine teeth (or tooth number 3) in the upper and lower jaw.

 So what is a standard bite?

A standard bite is a bite that ensures the following factors:

• Yes The teeth are located in a regularly arranged dental arch
• The relationship between the teeth of the two jaws belongs to the I Angle class: the tip of the mesiobuccal cusp of the upper 6th tooth fits into the buccal groove of the 6th lower jaw, the tip of the upper canine tooth fits into the gap between the canine tooth and the lower first premolar.
• Good contact point in the incisor area to create the correct overbite and overbite: The biting edge of the upper incisor is 1-3mm in front of the biting edge of the lower incisor, the biting edge of the upper incisor covers about 1/3 of the biting edge of the body of the incisor. lower.
• The entire outer cusp of the upper posterior teeth area overlaps with the outer cusp of the lower posterior teeth area, the inner cusp of the upper posterior teeth area matches the groove of the lower posterior teeth area
• The lines between the teeth of the two jaws coincide with each other and coincide with the midline of the face.
• In addition, a standard bite also needs to achieve balance with other parts of the face such as the forehead, eyes, nose, chin,... viewed from different facial angles.

To determine the bite of the mouth. Whether the patient has a standard bite or not, and to detect deviations to have an appropriate treatment plan, the doctor needs to conduct a clinical examination and analysis, and have the support of useful diagnostic tools, including:

Smilestream software:

• Evaluate tooth bite
• Measure jaw bone parameters on X-ray films
• Measure deviations in size, shape of jaw arch, tooth axis or excess/lack of space on a personalized jaw model.

Autolign software:

• Identify the shape and size of each tooth on the jaw, thereby providing indicators showing deviations in tooth size and the degree of crowding/gap.
• Accurately determine overbite and overbite
• Assess the symmetry of the tooth arch
• Assess the occlusal plane 

How to recognize the bite through the mirror

To evaluate and classify the bite, the doctor Doctors need to combine many factors. However, you can completely identify your bite condition through the mirror with the following instructions:

 Relaxed lip position:

Stand in front of the mirror, both lips completely relaxed (no lip pursing), observe the line between the upper and lower teeth (if the front teeth are exposed)

Tight bite position in front:

Stand in front of the mirror, clench your jaw, smile as wide as possible, evaluate:

ü Teeth crowding in the front

ü Gap in the front

ü Line between the two jaws

ü Overbite

ü Overbite

Right side bite

Stand in front of a mirror, use your hand (or supporting tools such as a spoon, tongue depressor) to spread the right cheek backwards to fully expose the first molar (tooth number 6), observe the relationship between the 6th tooth and the canines on both jaws, compare with their standard position.

Lateral bite left

Stand in front of a mirror, use your hands (or supporting tools such as spoons, tongue depressors) to spread your left cheek back to reveal the first molar (tooth number 6), observe the relationship between teeth 6 and canines in both jaws, compare with their standard position.

Upper jaw

Standing in front of the mirror, head slightly tilted back, should have the support of a flashlight/flashlight to observe all upper teeth, evaluate the shape of the dental arch, symmetry on both sides of the jaw, and the axis of the teeth on the jaw.

Lower jaw

Standing in front of the mirror, head slightly bent forward, should have the support of a flashlight/flash light to observe all upper teeth, evaluate the shape of the dental arch, symmetry on both sides of the jaw, and the axis of the teeth on the jaw.

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After preliminary self-assessment of your bite, you can take photos of the above positions and send them to your doctor to receive the earliest advice!