With the aid of modern technology (precast molds and exotic materials) there is not reason a dentist should not be able to make teeth that look like teeth. The anatomy of teeth is simple. Here are a few names.
Starting from the center, the two large upper teeth are called incisors. Next to them are the lateral incisors, followed by the canines and the bicuspids. As you can see, each of them has a unique size and shape.
Why, then, do some dentists, even those who treat celebrities, make teeth that look like candy-coated gum? They all look the same, and all the biting edges line up like bathroom tiles, and they are as white as porcelain. Real teeth are not that white. The image below is my rendition.
Here is a real example of unreal cosmetic dentistry. Notice what is wrong.
1. All of the teeth are the same length
2. The biting edges are in a perfectly straight line
3. The upper incisors are square and have sharp corners (not rounded)
4. The lower incisors are too short
5. The canines are the wrong shape and too short.