title: Efficacy of threaded hydroxyapatite-coated implants in the anterior mandible supporting overdentures.
abstract: A data subset from an ongoing prospective multicenter clinical study of threaded hydroxyapatite-coated implants was evaluated to assess safety and efficacy of the implants when placed in the anterior mandible to support overdentures. Observations were recorded before surgery, at first-stage surgery, at second-stage surgery, at loading, and at quarterly postrestoration prophylactic exams and annual comprehensive patient visits. Implant failure criteria included mobility, radiographic evidence of bone loss greater than one-third the length of the implant or peri-implant radiolucency, fracture, exfoliation, removal for any reason, and patient reported pain upon palpation. Soft tissue indices were monitored as part of the study. Postrestoration implant performance was analyzed using life-table methodology. From the 2,062 implants restored in 720 patients in the parent study, a total of 660 implants in 174 patients were included in the anterior mandibular overdenture data subset. Twelve implants in 8 patients failed at or before second-stage surgery for a surgical success rate of 98.2 percent. Five implants failed during an observation period extending up to 72 months after completion of prosthodontic treatment. The Cutler-Ederer life table success rate after 5 years was 97.8 percent. No significant adverse events were reported during the observation period. Results of this investigation suggest that threaded hydroxyapatite-coated implants are effective when placed in anterior mandibular regions in support of overdentures.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dental Medicine, University of Pennsylvania, Philadelphia 19104-6003, USA.
authors.forename: A U
authors.initials: AU
authors.lastname: Buchs
authors.forename: J
authors.initials: J
authors.lastname: Hahn
authors.forename: D M
authors.initials: DM
authors.lastname: Vassos
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003481:Cuspid; D015921:Dental Implants / Q000706:statistics & numerical data; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003828:Denture, Overlay; D017886:Durapatite; D005260:Female; D006801:Humans; D007180:Incisor; D015993:Life Tables; D008297:Male; D008334:Mandible; D008875:Middle Aged; D010512:Periodontal Index; D011446:Prospective Studies; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants; D017886:Durapatite