Could it be more of a genetic thing to have straight teeth or are there outside factors involved too? Not to mention having crooked teeth can cause so many issues but it’s common.
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Evolution. We have slowly been evolving a smaller jaw, with less room for our teeth. Because we cook our food, our genetics no longer prioritize big jaw muscles and extra large molars, hence why our wisdom teeth are often a problem.
Our jaws have shrunken faster than we evolved, having fewer/smaller teeth.
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