Many practitioners place single-tooth implants when the teeth adjacent
to the edentulous space are intact, free of caries and have had no re
storations, and the patient is reluctant to wear a removable appliance
for physical or psychological reasons, or both. The main exclusionary
factors for a single-tooth dental implant are insufficient bone quant
ity, poor bone quality and insufficient vertical interarch space to ac
commodate the prosthodontic components of the implant.