We treated an ITI hollow cylinder implant F-type (ITI・F) that had been removed from a patient due to breakage thereof and obtained the following conclusions.
1. The possibility of breakage must be stated as one of the risks of dental therapy when using ITI・F.
2. ITI・F osseointegrates with bone.
3. If radiolucency extends to the perforations, the tissue inside the cylinder might be degenerated; therefore, ITI・F could be a candidate for removal.
4. Patients treated with ITI・F require regular follow-up examinations at short intervals and detailed prognostic observations.
