title: Treatment of the edentulous atrophic maxilla using zygomatic implants: evaluation of survival rates over 5-10 years.
abstract: The aim of this retrospective observational cohort study was to analyse and report the 5-10-year survival rates of endosseous zygomatic implants used in the rehabilitation of the atrophic maxilla. Forty-three consecutive zygomatic implant placements in 25 patients were evaluated over a 5-10-year period. All zygomatic implant surgery was carried out under general anaesthesia. Nobel Biocare zygomatic machined-surface implants were used, and placement was undertaken using the modified sinus slot method. The main outcome measures and determinants for success were survival of the restored implants and the proportion of originally planned prostheses delivered to patients. Of the 25 patients treated, 12 were male and 13 were female; 19 were non-smokers, and the mean age at time of surgery was 64 years. Patients were treatment-planned for implant-retained bridgework, a removable prosthesis retained by fixed cast gold or milled titanium beams, or magnet-retained removable prostheses. A combination of zygomatic and conventional implants was used in all but one patient. In this study it was shown that the overall success rate for zygomatic implants was 86%, with six of the implants either failing to integrate or requiring removal due to persistent infection associated with the maxillary sinus. All patients received their planned prosthesis, although in six cases the method of retention required modification. This study illustrates that zygomatic implants are a successful and important treatment option when trying to restore the atrophic maxilla, with the potential to avoid additional augmentation/grafting procedures and resulting in a high long-term success rate.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University of Manchester, Manchester, UK. Electronic address: julian.yates@manchester.ac.uk.
authors.forename: J M
authors.initials: JM
authors.lastname: Yates
authors.affiliation: Department of Oral and Maxillofacial Medicine and Surgery, University of Sheffield, Sheffield, UK.
authors.forename: I M
authors.initials: IM
authors.lastname: Brook
authors.affiliation: Department of Adult Dental Care, University of Sheffield, Sheffield, UK.
authors.forename: R R
authors.initials: RR
authors.lastname: Patel
authors.affiliation: Department of Adult Dental Care, University of Sheffield, Sheffield, UK.
authors.forename: P F
authors.initials: PF
authors.lastname: Wragg
authors.affiliation: Department of Oral and Maxillofacial Medicine and Surgery, University of Sheffield, Sheffield, UK.
authors.forename: S A
authors.initials: SA
authors.lastname: Atkins
authors.affiliation: Department of Oral and Maxillofacial Medicine and Surgery, University of Sheffield, Sheffield, UK.
authors.forename: A
authors.initials: A
authors.lastname: El-Awa
authors.affiliation: Department of Oral and Maxillofacial Medicine and Surgery, University of Sheffield, Sheffield, UK.
authors.forename: I
authors.initials: I
authors.lastname: Bakri
authors.affiliation: Department of Oral and Maxillofacial Medicine and Surgery, University of Sheffield, Sheffield, UK.
authors.forename: R
authors.initials: R
authors.lastname: Bolt
mesh_terms: D001284:Atrophy; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D015050:Zygoma / Q000000981:diagnostic imaging / Q000601:surgery*
chemical_list: D015921:Dental Implants
keywords: atrophic maxilla; dental implants; modified sinus slot technique; zygomatic implants