JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY
Periodontitis and dental implants, illustration. This patient has receding and inflamed gums. This is typical of conditions such as gingivitis and periodontal disease (periodontitis). If not checked, erosion of the teeth and gums leads to loss of the teeth. The teeth may need to be extracted and replaced with implants, as shown here. The teeth are shown in an X-ray at upper right. The typical process for an implant is to drill a hole in the jaw bone, insert a titanium base, and screw an artificial tooth into this base. The implant here is for one of the incisors at the front of the mouth. The insets show molars and premolars.
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