The biologic stability of alumina-zirconia implant abutments after 1 year of clinical service: a digital subtraction radiographic evaluation.
The purpose of the present clinical study was to evaluate the biologic stability of alumina-zirconia implant abutments by histologic and radiographic examination. Nineteen partially edentulous patients were treated with 37 external-hexagon implants. After a healing period of 3 to 6 months, alumina-zirconia abutments were connected and restored with cemented single crowns or short-span fixed partial dentures. Periapical radiographs were taken at the time of prosthesis delivery and after 3, 6, and 12 months of follow-up. Crestal alveolar bone level changes were assessed by digital subtraction of consecutive images, and 1-way analysis of variance was used for statistical analysis. No implant, abutment, or restoration failed during the observation period. Bone level changes were statistically insignificant and histologic examination revealed no signs of inflammation. Stable and healthy soft and hard tissue conditions may be expected around alumina-zirconia abutments after 1 year of clinical service. However, long-term data are needed to confirm the present results.
Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, South Korea.
Kyu-Hyun
KH
Bae
Jung-Suk
JS
Han
Yang-Jo
YJ
Seol
Frank
F
Butz
Jack
J
Caton
In-Chul
IC
Rhyu
D000328:Adult; D000368:Aged; D000537:Aluminum Oxide / Q000737:chemistry; D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000473:pathology; D003442:Crowns; D000044:Dental Abutments; D015921:Dental Implants; D019250:Dental Implants, Single-Tooth; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016348:Osseointegration / Q000502:physiology*; D019252:Radiography, Dental, Digital; D013382:Subtraction Technique; D015040:Zirconium / Q000737:chemistry
D015921:Dental Implants; D003764:Dental Materials; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide