This is one of the most asked questions we have at Fresh Smiles. Some people may think that Invisalign aligners will only work for minor teeth straightening issues, but the Invisalign System can also be used to treat a range of moderate to severe teeth straightening issues including overcrowded teeth, widely spaced teeth, crossbite, overbite and underbite. We thought we would give you a quick rundown and some before and after treatment images to show you just how amazing the Invisalign aligner system really is!

Overcrowded teeth

This occurs when there’s simply a lack of room within your jaw for all of your teeth to fit normally. When left untreated, overly crowded teeth can lead to plague accumulation, tooth decay and an increased chance of gum disease.

Invisalign treatment after only 17 months.

Widely spaced teeth

The opposite of overcrowded teeth, widely spaced teeth occur when you have extra space within your jaw due to small-sized teeth, abnormal growth of the jawbones, genetics, missing teeth, and/or tongue protrusion. Missing teeth causes the surrounding teeth to shift due to the extra space, creating gaps in your teeth that can lead to gum problems (due to a lack of protection by the teeth), periodontal pockets, and increased risk of periodontal disease.

Invisalign treatment after only 11 months

This occurs when the upper and lower jaws are misaligned. It causes one or more upper teeth to bite on the inside of the lower teeth, and can happen on both the front and sides of the mouth. Left untreated, this issue can cause wear of teeth, gum disease and bone loss.

Invisalign treatment after only 16 months.


Overbite occurs when the upper teeth bite over the lower teeth. It’s typically caused by genetics, bad oral habits, or overdevelopment of the bone that supports the teeth. This can lead to gum problems or irritation, and/or wear on the lower teeth, and can cause painful jaw and joint problems.

Invisalign treatment after only 16 months.


The opposite of overbite, underbite occurs when the lower teeth protrude past the upper front teeth. It’s usually caused by the undergrowth of the upper jaw, overgrowth of the lower jaw, or both. It can also be caused by missing upper teeth. This can prevent the normal function of front teeth or molars that can lead to tooth wear. It can also cause painful jaw and joint problems.

Invisalign treatment after only 24 months.

You may be surprised to know that the benefits of having properly aligned teeth extend far beyond a confident smile. It is well known that healthier gums straighter teeth can actually significantly affect your overall dental health. If we all think about it — a smile can hardly be perfect if it’s not a healthy one. Healthier, brighter teeth will ensure your gum health can be maintained better. Fortunately, with Invisalign®, having a confident smile and reducing your risk for tooth decay and gum disease go hand in hand.