Most common mechanism of failure of dental implants is: (A) Alveolar crest resorption due to overloading, (B) Periimplantitis due to infection, (C) Implant fracture after loading, (D) None of the above
Answer is A. The most common failure mechanism is alveolar crest resorption due to overloading. This inevitably leads to progressive periodontal lesions, decreased areas of supporting tissues, and ultimately to implant loosening. Aseptic failures are most often the cumu- lative result of more than one of the aforementioned factors.