title: [Early detection of threatened implant loss in tumor patients].
abstract: After resection of an oropharyngeal tumor, 157 dental implants were placed in 17 irradiated (44 Gy on average) and 20 non-irradiated patients. Within a control period of 37 months, 15 implants had failed. The reason for implant failure was analyzed, whereby indicative parameters were revealed. Eleven implants in four irradiated and one non-irradiated oral cancer patients showed no primary osseointegration during the healing period because of mandible fracture, overloading or for unknown reasons. Four implants in one irradiated and three non-irradiated oral-cancer patients were lost subsequently on average 39 months after second-stage surgery due to biomechanical overloading or bacterial infection. No osteoradionecrosis development due to implant failure was observed in irradiated patients. In all cases, peri-implant pocket depth, implant stability and peri-implant bone resorption increased before definitive implant failure. Therefore, these findings seem to be useful as indicative parameters in the prediction of implant failure.
authors.affiliation: Klinik und Poliklinik für Gesichts- und Kieferchirurgie, Essen.
authors.forename: T
authors.initials: T
authors.lastname: Weischer
authors.forename: C
authors.initials: C
authors.lastname: Mohr
mesh_terms: D000328:Adult; D003131:Combined Modality Therapy; D003758:Dental Implantation, Endosseous; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible / Q000528:radiation effects*; D008875:Middle Aged; D009959:Oropharyngeal Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D009960:Oropharynx / Q000528:radiation effects / Q000601:surgery; D016348:Osseointegration / Q000528:radiation effects; D010025:Osteoradionecrosis / Q000209:etiology*; D011475:Prosthesis Failure; D018714:Radiotherapy, Adjuvant; D012307:Risk Factors