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Immediate functional loading of single-tooth TiO2 grit-blasted implant restoration. A controlled prospective study in a porcine model. Part II: Histology and histomorphometry

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Bousdras, Vasilios A. Walboomers, Frank Jansen, John A. Cunningham, James L. Blunn, Gordon Goodship, Allen E.

Background: Evidently, there is a fast-moving shift from delayed to immediate implant loading. The hypothesis to be tested was that bone reactions adjacent to single TiO2-microthreaded implants exposed to immediate masticatory loading for 10 weeks after placement would modulate osseointegration. Materials and Methods: Cylindrical- and tapered-designed implants (Astra Tech AB, Molndal, Sweden) replaced first and third mandibular premolars respectively in 12 pigs. The animals were allocated into two groups based on soft and hard diet feeding. Each animal received, at random positions, four different masticatory loading conditions: implant with either (1) a cover screw only, (2) a healing abutment, (3) an implant with a crown without occlusal contact, or (4) an implant with a crown in contact with the antagonistic teeth. Results: Histomorphometry showed that there were no statistically significant differences in bone-implant contact (BIC), bone mass inside/outside of the threads and soft tissue ingrowth ratio for all the implants at 10 weeks after placement irrespective of masticatory loading condition. Bone loss showed a trend of progressive increase for implants with a healing abutment toward implants with occlusal contact. Conclusions: The results of this study rejected the hypothesis and could be explained by the fact that grit-blasted acid-etched implants were already placed in dense bone.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2007
Language Anglais
Journal information "Clinical Implant Dentistry and Related Research" - Vol. 9, no. 4, p. 207-216 (2007)
Peer reviewed yes
Publisher Blackwell Publishing (Oxford)
issn 1523-0899
e-issn 1708-8208
Publication status Publié
Affiliation UCL
Keywords adaptation ; bone-implant interface ; immediate loading ; masticatory loads ; single dental implant
Links
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Bibliographic reference Bousdras, Vasilios A. ; Walboomers, Frank ; Jansen, John A. ; Cunningham, James L. ; Blunn, Gordon ; et. al. Immediate functional loading of single-tooth TiO2 grit-blasted implant restoration. A controlled prospective study in a porcine model. Part II: Histology and histomorphometry. In: Clinical Implant Dentistry and Related Research, Vol. 9, no. 4, p. 207-216 (2007)
Permanent URL http://hdl.handle.net/2078.1/37200