title: Marginal tissue response adjacent to Astra Dental Implants supporting overdentures in the mandible.
abstract: The aim of this study was to evaluate the marginal tissue response adjacent to implant supported overdentures. Twenty edentulous patients had 2 Astra Dental Implants placed in the canine region of the lower jaw. New overdentures were retained by individual ball attachments in 11 patients and by a bar attachment in 9 patients. Periodontal registrations were recorded 0 months, 6 months, 12 months and 24 months after the overdentures were inserted. One of the 40 fixtures was lost at the stage of abutment connection. No fixtures were lost during the 2- to 4-year observation period and no fixtures showed any periodontal signs of failure. At the 2-year examination, no pocket depths adjacent to the implants exceeded 4 mm and no bone loss exceeded 3 mm. The mean annual bone loss was less than 0.2 mm during the first 2 years. The preliminary results from this limited study were promising and showed that two osseointegrated Astra Dental Implants could successfully retain an overdenture in the lower jaw. However, long-term observation is needed for a definitive evaluation of this treatment concept.
authors.affiliation: Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark.
authors.forename: K
authors.initials: K
authors.lastname: Gotfredsen
authors.forename: B
authors.initials: B
authors.lastname: Holm
authors.forename: I
authors.initials: I
authors.lastname: Sewerin
authors.forename: F
authors.initials: F
authors.lastname: Harder
authors.forename: E
authors.initials: E
authors.lastname: Hjörting-Hansen
authors.forename: C S
authors.initials: CS
authors.lastname: Pedersen
authors.forename: K
authors.initials: K
authors.lastname: Christensen
mesh_terms: D000368:Aged; D016301:Alveolar Bone Loss / Q000209:etiology; D015921:Dental Implants / Q000009:adverse effects; D003774:Dental Plaque Index; D003828:Denture, Overlay / Q000009:adverse effects; D005260:Female; D005885:Gingival Hyperplasia / Q000209:etiology; D006801:Humans; D007633:Keratins; D008297:Male; D008334:Mandible; D008875:Middle Aged; D010512:Periodontal Index
chemical_list: D015921:Dental Implants; D007633:Keratins