Implant restorations can fail biologically or mechanically. Biological factors include unsuccessful osseointegration or presence of peri-implantitis. Mechanical failures include crown fracture, framework fracture, screw loosening, and screw fracture. Fracture of the implant abutment can be a serious problem as the fragment remaining inside the implant may prevent the implant from functioning efficiently. The procedure used for removal of the fractured screw portion is described in this clinical report.

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Bisphosphonates are compound used in the treatment of many skeletal disorders such as bone metastases, osteoporosis, Paget's disease, hypercalcaemia of malignancy and bone pain. A new complication of bisphosphonate therapy administration i.e. osteonecrosis of jaw also known as bisphosphonate related osteonecrosis of the jaws seems to be developing. Over suppression of bone turn over is probably the primary mechanism for the development of this condition, although there may be contributing comorbid factors. Complete prevention of this complication is not currently possible. However, preventive dental care reduces this incidence. Conservative debridement of necrotic bone, pain control, infection management, use of antimicrobial oral rinses and withdrawal of bisphosphonates are preferable to aggressive surgical measures for treating this condition.