title: Trabecular bone response to surface roughened and calcium phosphate (Ca-P) coated titanium implants.
abstract: The influence of calcium phosphate (Ca-P) coating and surface roughness on the trabecular bone response of titanium implants was investigated. Four types of titanium implants, i.e. blasted with titanium powder, sintered with titanium beads, titanium powder blasted and provided with an additional Ca-P coating, and titanium beads with Ca-P coating, were prepared. The Ca-P coating was deposited by ion beam dynamic mixing method. The Ca-P coating was rapid heat-treated with infrared radiation at 700 degrees C. The implants were inserted into the trabecular bone of the left and right femoral condyles of 16 rabbits. After implantation periods of 2, 3, 4 and 12 weeks, the bone-implant interface was evaluated histologically and histomorphometrically. Histological evaluation revealed new bone formation around different implant materials after already 3 weeks of implantation. After 12 weeks, mature trabecular bone surrounded all implants. At 3 and 4 weeks of implantation, no difference existed in bone contact to the various implant materials. On the other hand, after 12 weeks of implantation the highest percentage of bone contact was found around the Ca-P coated beads implants. Supported by the results, we concluded that the combination of surface geometry and Ca-P coating benefits the implant-bone response during the healing phase.
authors.affiliation: Department of Dental Materials, Nihon University School of Dentistry at Matsudo, Chiba, Japan. hayakawa@masact.nihon-u.ac.jp
authors.forename: Tohru
authors.initials: T
authors.lastname: Hayakawa
authors.forename: Masao
authors.initials: M
authors.lastname: Yoshinari
authors.forename: Hideo
authors.initials: H
authors.lastname: Kiba
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Kimiya
authors.initials: K
authors.lastname: Nemoto
authors.forename: John A
authors.initials: JA
authors.lastname: Jansen
mesh_terms: D000818:Animals; D001672:Biocompatible Materials; D002130:Calcium Phosphates; D005260:Female; D005269:Femur / Q000033:anatomy & histology / Q000601:surgery; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D016348:Osseointegration; D019736:Prostheses and Implants; D011817:Rabbits; D013499:Surface Properties; D014025:Titanium
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; D014025:Titanium; C485829:calcium phosphate, dibasic, anhydrous