𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Degradation of hydroxylapatite, fluorapatite, and fluorhydroxyapatite coatings of dental implants in dogs

✍ Scribed by Gineste, L. ;Gineste, M. ;Ranz, X. ;Ellefterion, A. ;Guilhem, A. ;Rouquet, N. ;Frayssinet, P.

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
448 KB
Volume
48
Category
Article
ISSN
0021-9304

No coin nor oath required. For personal study only.

✦ Synopsis

Calcium phosphate coatings on dental implants enhance integration of the material. Resorption of the ceramic coatings has raised some concern about the behavior of the bone-implant interfaces after the coating disappearance. Substitution of the OH ؊ ions by fluoride in the hydroxylapatite (HA) lattice makes the calcium phosphate more stable. We investigated the degradation rate of dental implants with 50-and 100-m coatings of HA, fluorapatite (FA), or fluorhydroxylapatite (FHA). The implants were inserted in dog jaws and retrieved for histological analysis after 3, 6, and 12 months. The thickness of the calcium phosphate coatings was evaluated using an image analysis device. A relative resorption index and its standard deviation were studied. HA and FA coatings (even at 100-m thickness) were almost totally degraded within the implantation period. In contrast, the FHA coatings did not show significant degradation during the same period. The standard deviation showed that the resorption process for FHA with thicknesses of 50 or 100 m was the same. Such a difference was not observed between the 50-and 100-m thick coatings of FA and HA. In conclusion, the FHA coatings showed good integration in the bone tissue and lasted much longer than classic calcium phosphate coatings.

📜 SIMILAR VOLUMES

Resorption of hydroxyapatite and fluorap
Resorption of hydroxyapatite and fluorapatite ceramic coatings on weight-bearing implants: A quantitative and morphological study in dogs
✍ Overgaard, S�ren ;Lind, Martin ;Josephsen, Kaj ;Maunsbach, Arvid B. ;B�nger, Cod 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 759 KB

Resorption (defined as loss of ceramic coating because of cellular activity or dissolution) of ceramic coatings is a matter of concern for the long-term performance of ceramic-coated implants. A new fluorine-containing coating, fluorapatite (FA), has been shown to be more stable than hydroxyapatite

Early healing of nanothickness biocerami
Early healing of nanothickness bioceramic coatings on dental implants. An experimental study in dogs
✍ Paulo G. Coelho; Giuseppe Cardaropoli; Marcelo Suzuki; Jack E. Lemons 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 532 KB

## Abstract Thick bioceramic coatings like plasma sprayed hydroxyapatite have been shown to increase the overall tissue response and biomechanical fixation of dental implants. However, the presence and potential fracture of a bone‐coating‐metallic substrate interface at long times after implantatio

In vitro and in vivo degradation of biom
In vitro and in vivo degradation of biomimetic octacalcium phosphate and carbonate apatite coatings on titanium implants
✍ F. Barrère; C. M. van der Valk; R. A. J. Dalmeijer; C. A. van Blitterswijk; K. d 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 442 KB

## Abstract Calcium phosphate (Ca‐P) coatings have been applied onto titanium alloys prosthesis to combine the srength of metals with the bioactivity of Ca‐P. It has been clearly shown in many publications that Ca‐P coating accelerates bone formation around the implant. However, longevity of the Ca

In vitro assessment of the osteointegrat
In vitro assessment of the osteointegrative potential of a novel multiphase anodic spark deposition coating for orthopaedic and dental implants
✍ Enrico Sandrini; Christopher Morris; Roberto Chiesa; Alberto Cigada; Matteo Sant 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 445 KB

## Abstract Hydroxyapatite coatings have been proven to improve the osteointegration of metal implants through a tight binding to the bone mineral phase as well as through favorable osteoblast adhesion and proliferation onto the implant surface. However, hydroxyapatite coatings are not stable and t

Student research award in the graduate d
Student research award in the graduate degree candidate category, 17th annual meeting of the society for biomaterials, scottsdale, AZ may 1-5,1991. A mechanical investigation of fluorapatite, magnesiumwhitlockite, and hydroxylapatite plasma-sprayed coatings in goats
✍ Dhert, W. J. A. ;Klein, C. P. A. T. ;Wolke, J. G. C. ;van der Velde, E. A. ;de G 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 1017 KB

## Abstract Ceramic coatings of fluorapatite (FA), magnesiumwhitlockite (MW), and hydroxylapatite (HA), and noncoated Ti‐6Al‐4V alloy (Ti) implants were evaluated before and after implantation in an animal study. Cylindrical plugs were coated by plasma‐spraying with FA, MW, and HA. X‐ray‐diffractio