Zusammenfassung
Einleitung: Die Sinusbodenaugmentation (Sinus lift) mit autologem Knochen ist indiziert, wenn
aufgrund einer ausgedehnten Kieferhöhle die vertikale Knochenhöhe im seitlichen Oberkiefer
nicht zur Versorgung mit Zahnimplantaten ausreicht. Zweck dieser Studie war, alternativ
zum Knochentransplantat ein osteokonduktives Knochenersatzmaterial (natürliches bovines
Knochenmaterial BioOss®) mit rekombinantem humanem Osteogenic Protein-1 (rhOP-1) einzusetzen.
Material und Methoden: In fünf Göttinger Minischweinen wurde beidseits mit 3 ml BioOss® augmentiert. Die
Testseite erhielt zusätzlich 420 µg rhOP-1, simultan wurden jeweils ein ITI® Titanschraubenimplantat
von laterokaudal inseriert. Ergebnisse: Die histologische Auswertung nach 6 Monaten umfasste Mikroradiographie, Fluoreszenzmikroskopie
und Toluidinblaufärbung in unentkalkten Hartschliffen. Auf der rhOP-1-Testseite wurde
der Knochen-Implantatkontakt im augmentierten Areal mit 80 % vermessen, auf der rein
osteokonduktiven Kontrollseite mit 38,6 %. Das osteoinduktive Protein führte zu einer
beschleunigten und verstärkten knöchernen Integration der Implantate. Diskussion: Nach den vorliegenden Daten ist das vorgestellte Verfahren möglicherweise eine klinische
Alternative zum autologen Knochentransplantat in der Sinusbodenaugmentation.
Sinus Floor Augmentation with Simultaneous Insertion of Dental Implants Using Recombinant
Human Osteogenic Protein-1
Introduction: The purpose of this study was to examine whether the combination of an osteoinductive
protein (recombinant human osteogenic protein- (rhOP-1 = bone morphogenetic protein-7)
with natural bovine bone mineral (BioOss®) would improve ossification and the bone-implant
contact (BIC) in a sinus floor augmentation with simultaneous placement of implants.
Material and Methods: In this study, the maxillary sinus floors in five miniature pigs were augmented with
3 ml BioOss® containing 420 μg rhOP-1 on the test side and 3 ml BioOss® alone on the
control side. At the time of augmentation a titanium implant (ITI®) was inserted from
a laterocaudal direction. Results: After 6 months of healing the sites of augmentation were removed and examined in
non-decalcified sections by microradiography, fluorescence microscopy of sequentially
labelled specimens and by histometry. On both sides, significant amounts of newly
formed bone were observed. However, on the test sites, the BIC in the augmented area
was 80.0 % versus 38.6 % on control sites. It can be concluded that the application
of bone morphogenetic proteins caused a more rapid and enhanced osseointegration of
simultaneously placed implants when compared to the bone substitute alone. Discussion:
Therefore recombinant human osteogenic protein-1 delivered by natural bone mineral
has the potential to become a clinical alternative for autogenous bone grafts in sinus
floor augmentation.
Schlüsselwörter:
Zahnimplantate - Sinusbodenaugmentation - Bone Morphogenetic Proteins - Osteogenic
Protein-1 - Osteoinduktive Proteine
Key words:
Dental implants - Sinus lift operation - Bone morphogenetic proteins - Osteogenic
protein-1 - Osteoinductive proteins
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1 Ausgezeichnet mit dem Tagungsbestpreis der Deutschen Gesellschaft für Implantologie
im Zahn-, Mund- und Kieferbereich 1997.
2 Herrn Prof. Dr. Rudert zum 65. Geburtstag gewidmet.
Priv. Doz. Dr. med. Dr. med. dent. Hendrik Terheyden
Klinik für Mund-, Kiefer- und GesichtschirurgieUniversität Kiel
Arnold-Heller-Straße 1624 105 Kiel
Email: E-mail: terheyden@mkg.uni-kiel.de