1. Overactive upper lip elevator muscle
2. Close attachment between the upper lip and gums
3. Excess gum tissue
4. Naturally small or short teeth
- Gummy smile correction can be done by simple procedures such as gingivoplasty, gingivectomy or/and crown lengthening followed by giving porcelain veneers or crowns, if needed.
- Mild Gummy Smile: If the amount of gum tissue displayed while smiling is less than 25% of the entire length of the teeth, it is considered a mild gummy smile.
- Moderate Gummy Smile: If the amount of gum tissue displayed is between 25% and 50% of the length of the teeth, it is considered a moderate gummy smile.
- Advanced Gummy Smile: If the amount of gum tissue displayed is between 50% and 100% of the length of the teeth, it is considered an advanced gummy smile.
- Severe Gummy Smile: If the amount of gum tissue displayed is greater than 100% of the length of the teeth, it is considered a severe gummy smile.