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TLDR: Your jaw probably isn't too square and your ramus isn't too long. Your teeth may just be forcing it into an unnatural position and causing swelling, which can be fixed with braces.
I decided to make this guide because there isn't much direct information on this topic. There is also a lot of misleading information, particularly from some South Korean cosmetic surgery clinics that encourage people to undergo jaw shaving (ramus reduction) instead of addressing the underlying cause of the issue. In many cases, jaw shaving is unnecessary and can produce less favorable results, especially for men. Some clinics also use heavily edited before-and-after photos to market these procedures. This thread is written for people with no prior knowledge, so I'll explain concepts that may seem obvious to those already familiar with the subject.Overbite and Deep Bite
In a normal bite, the upper front teeth (incisors) sit slightly in front of the lower incisors. When viewed from the front, the upper incisors should slightly cover the lower incisors when biting down. Additionally, there should be a small horizontal gap so that the teeth do not hit each other. An overbite is a type of malocclusion (abnormal bite), that refers to several types of bites where the upper incisors are either slightly or significantly in front of the lower incisors. A deep bite is a type of overbite where the upper incisors cover most of the lower incisors when biting down. From the front, the lower incisors will be mostly covered.Dental vs. Skeletal Malocclusion
Malocclusions can be either skeletal or dental. Skeletal malocclusions are caused by improper jaw development and typically require surgery or expansion to correct. A dental deep bite occurs when the jaws are properly developed, but the teeth are positioned incorrectly, which leads to other issues. This type can often be corrected with braces alone, which is what this thread focuses on.How do I know if I have a dental deep bite, and why is it important?
Dental deep bites are unique because the upper incisors hit the lower incisors when biting down due to the upper incisors being rotated inward. If you completely relax your jaw and notice that your lower jaw naturally moves forward to a position where you can no longer bite down comfortably without pulling it back, this is a strong indication of a dental deep bite. In other words, the upper incisors may be preventing the lower jaw from resting in its natural position, which is slightly forward and rotated downward.The unnatural position caused by a dental deep bite can make the chin and the entire lower third of the face appear shorter. Because the lower jaw cannot rotate downward, the molars (back teeth) are suppressed or slanted, which shortens the height of the chin and jaw as a whole. When combined with a long ramus, this can create an uncannily square look. Dental deep bites are also commonly associated with symptoms such as jaw tension, clicking, bruxism (teeth grinding), and masseter hypertrophy (enlargement of the jaw muscles), which can make the jaw appear wider than normal.
How Braces Correct Dental Deep Bites
When treating a dental deep bite with braces, your orthodontist will typically use bite blocks (also called bite turbos, bite pillows, or bite ramps) to hold your bite open. This allows the upper incisors to rotate outward while the molars erupt further. As treatment progresses, the bite closes at a shallower point, allowing the jaw to rest in its natural position. In some cases, your orthodontist may place bite blocks on the back teeth for the first few weeks before switching to incisor bite blocks, which is also a normal treatment approach.Additional Notes
- If you have severe masseter hypertrophy (where the jaw is wider than the cheekbones), it may not fully resolve after braces. However, mild masseter hypertrophy often improves once the jaw is able to rest in its natural position.
- Bite blocks placed on the incisors generally allow the molars to erupt more efficiently. Rubber bands may also be used to help speed up this process.
- In addition to aesthetic improvements, correcting dental deep bites resolves symptoms such as jaw clicking, grinding, and chronic tension.
- Everything discussed here applies only to dental deep bites. Skeletal malocclusions generally require surgery, expanders, or other orthopedic treatment.
Addressing Common Misconceptions
"Braces will make you recessed."This can only occur with extractions. Modern orthodontists are typically much more conservative with extractions will usually recommend expanders if needed.
"Braces can't change your jaw, they only move teeth."
This is true in many cases because most malocclusions are skeletal. However, dental malocclusions are different. If the teeth are preventing the jaw from resting in its natural position, correcting the tooth positions can allow the jaw to settle into that position without surgery.