Did you know that teeth have changed quite a bit over the centuries? Thousands of years ago, our early ancestors relied on their teeth as tools, not just for eating. Archeologists have found evidence of ancient civilizations using their chompers to remove scales from fish and many other amazing discoveries. However, human diets have caused teeth to change over time. Here are just a few ways they have evolved.
Secrets Held in Ancient Teeth
Scientists have been able to learn more about ancient eating habits through teeth. They have found microfossils of fish scales, fish flesh, and starch granules, concluding early humans were hunters and gatherers. While food residue rarely survives into fossil records, teeth can hold many secrets. They are protected by enamel, which is the hardest substance in the human body. Enamel is 97% mineral, making it stronger than bone. As a result, more evidence can survive the passing of time.
Evolution of Human Teeth
Teeth have changed a lot from our early ancestors because of diet changes. For example, wisdom teeth helped grind and gnaw tough foods. Nowadays, many people need to have their third molars removed because they cause more harm than good.
Teeth have gotten smaller throughout time, which has caused humans to have shorter jaws. As a result, there’s often not enough room in the mouth to accommodate wisdom teeth, leading to impactions, overcrowding, pain, and infections.
7 million years ago, humans also had pointed canines, parallel tooth rows, and projecting facial profiles. Around 5.5 million years ago, teeth started becoming smaller and less pointed. 2 million years later, teeth were arranged wider apart in the back of the mouth than the front.
Teeth became shorter and blunter around 1.8 million years ago and jaws were much smaller. This created a more vertical facial profile, which forced side rows of teeth, creating a rounded arch. Over the next thousands of years, jaws were even shorter and chins became pointed for added strength. Teeth were arranged in a tight parabolic arch. Facial profiles no longer protruded.
Teeth Can Last for a Lifetime
Your teeth look far different from those of our ancestors. They are relatively small and close together. Wisdom teeth no longer serve a purpose, and your premolars and molars are flat with low, rounded cusps.
Your teeth are protected by a thick layer of enamel, allowing them to last for a lifetime with the right care. Brushing, flossing, and regular dental care can ensure your dazzling smile thrives for decades. Choose nutritious foods and limit sugars to protect against tooth loss.
About Dr. Ted Morgan
Dr. Morgan achieved his dental degree at the University of Illinois at the Chicago College of Dentistry. He regularly continues his education to provide the best solutions in dentistry. He is a proud member of many professional organizations, including the Academy of General Dentistry. Request an appointment through his website or call his office at (207) 618-9587.