title: Connective tissue orientation around dental implants in a canine model.
abstract: The objective of this study was to evaluate the orientation of collagen in the canine gingival connective tissue to a titanium surface (TI), and to hydroxyapatite coatings applied by plasma-spraying (HAPS) and ion beam assisted deposition (IBAD), on the supracrestal region of dental implants after 3 and 4 months. The effects of induced peri-implantitis on the soft connective tissue apposed to the implant were also evaluated. The use of these three surface types allowed for the evaluation of the effects of chemical composition (TI vs. IBAD; same topography) and topography (HAPS vs. IBAD; similar chemical composition) on the collagen fiber orientation. The majority of collagen fibers were found to be parallel to the implant surface, and there was no significant effect of surface type on orientation. There was a significant effect of inflammation on the connective tissue attachment length. The loss of bone height and concomitant gingival recession reduced the length of soft connective tissue apposed to the implant zone designed for collagen fiber attachment.
authors.affiliation: Department of Restorative Dentistry, Harvard School of Dental Medicine, Boston, MA, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Comut
authors.forename: H P
authors.initials: HP
authors.lastname: Weber
authors.forename: S
authors.initials: S
authors.lastname: Shortkroff
authors.forename: F Z
authors.initials: FZ
authors.lastname: Cui
authors.forename: M
authors.initials: M
authors.lastname: Spector
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002448:Cell Adhesion; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003094:Collagen / Q000648:ultrastructure; D003238:Connective Tissue / Q000473:pathology; D003239:Connective Tissue Cells / Q000473:pathology; D015921:Dental Implants; D017267:Dental Prosthesis Design; D004195:Disease Models, Animal; D004285:Dogs; D017886:Durapatite / Q000737:chemistry; D005500:Follow-Up Studies; D005881:Gingiva / Q000473:pathology*; D005884:Gingival Hemorrhage / Q000209:etiology; D005889:Gingival Recession / Q000209:etiology; D005891:Gingivitis / Q000209:etiology; D007249:Inflammation; D008334:Mandible / Q000473:pathology; D011897:Random Allocation; D013223:Statistics as Topic; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D014945:Wound Healing
chemical_list: D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D003094:Collagen; D017886:Durapatite; D014025:Titanium