title: Histologic evaluation of human bone integration on machined and sandblasted acid-etched titanium surfaces in type IV bone.
abstract: The aim of this preliminary study was to evaluate the influence of a sandblasted acid-etched surface on bone-implant contact percentage (BIC%) as well as the bone density in the threads area (BD%) in type 4 bone after 2 months of unloaded healing. Five subjects (mean age = 42.6 years) received 2 microimplants each during conventional implant surgery in the posterior maxilla. The microimplants with commercially pure titanium surface (machined) and sandblasted acid-etched surface served as the control and test surfaces, respectively. After a healing period of 2 months, the microimplants and the surrounding tissue were removed and prepared for ground sectioning and histomorphometric analysis. One microimplant with a machined surface was found to be clinically unstable at the time of retrieval. Histometric evaluation indicated mean BIC% was 20.66+/-14.54% and 40.08+/- 9.89% for machined and sandblasted acid-etched surfaces, respectively (P=.03). The BD% was 26.33 +/-19.92% for machined surface and 54.84+/-22.77% for sandblasted acid-etched surface (P=.015). Within the limits of this study, the data suggest that the sandblasted acid-etched implant surface presented a higher percentage of bone-implant contact compared with machined surfaces, under unloaded conditions in posterior maxilla after a healing period of 2 months.
authors.affiliation: Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos, SP-Brazil.
authors.forename: Sauro
authors.initials: S
authors.lastname: Grassi
authors.forename: Adriano
authors.initials: A
authors.lastname: Piattelli
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Ferrari
authors.forename: Luciene C
authors.initials: LC
authors.lastname: Figueiredo
authors.forename: Magda
authors.initials: M
authors.lastname: Feres
authors.forename: Giovanna
authors.initials: G
authors.lastname: Iezzi
authors.forename: Jamil Awad
authors.initials: JA
authors.lastname: Shibli
mesh_terms: D000134:Acid Etching, Dental; D000328:Adult; D015519:Bone Density; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D003775:Dental Polishing; D017267:Dental Prosthesis Design; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla; D008875:Middle Aged; D008904:Miniaturization; D008963:Molar; D016348:Osseointegration; D013499:Surface Properties; D014025:Titanium
chemical_list: D015921:Dental Implants; D014025:Titanium