Stability of autogenous bone grafts after sinus lift procedures: a comparative study between anterior and posterior aspects of the iliac crest and an intraoral donor site.
BACKGROUND
Autologous bone is the standard material used for augmentations in oral-maxillofacial surgery. Depending on the origin of the graft, subsequent bone resorption may vary.


METHODS
This prospective study evaluated 57 patients receiving 2-stage sinus floor augmentations. Monocortical samples were taken at the site of bone harvesting, including the posterior (n = 28) and anterior pelvic (n = 15) and retromolar (n = 14) regions. At second-stage surgery, 6 months after the implant insertion, bone cores were harvested at the site of implant placement. All samples were analyzed by microradiography.


RESULTS
Mean retromolar mineralization was 68.7% +/- 8.75%; 35.1% +/- 7.6% in the anterior and 30.7% +/- 9.5% in the posterior iliac crest. Areas augmented with grafts originating from the retromolar region showed a significant decrease to 53.0% +/- 5.15% (P = .001). A stable mineralization of 36.1% +/- 7.59% was found in sites where bone grafts from the anterior pelvic crest were used. Grafts from the posterior pelvis showed a slight increase to 34.5% +/- 6.5%.


CONCLUSIONS
This prospective clinical study demonstrates the differences in mineralization depending on the origin of autogenous bone. Even after 6 months, these values could still be correlated to the transplants origin.
Thorwarth
Michael
M
Department of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Erlangen, Germany. Michael.Thorwarth@mkg.imed.uni-erlangen.de
Srour
Safwan
S
Felszeghy
Endre
E
Kessler
Peter
P
Schultze-Mosgau
Stefan
S
Schlegel
Karl Andreas
KA
D000540:Alveolar Ridge Augmentation / Q000379:methods*; D015519:Bone Density; D016025:Bone Transplantation / Q000379:methods* / Q000502:physiology*; D002113:Calcification, Physiologic; D003758:Dental Implantation, Endosseous; D005260:Female; D006801:Humans; D007085:Ilium / Q000601:surgery; D008297:Male; D008334:Mandible / Q000601:surgery; D008443:Maxillary Sinus / Q000601:surgery; D008852:Microradiography; D008875:Middle Aged; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods; D011446:Prospective Studies; D018709:Statistics, Nonparametric; D020858:Tissue and Organ Harvesting; D014182:Transplantation, Autologous / Q000379:methods