title: The Volume Behavior of Autogenous Iliac Bone Grafts After Sinus Floor Elevation: A Clinical Pilot Study.
abstract: Iliac crest is still regarded as one of the most viable source of autogenous graft materials for extensive sinus floor elevation. Three-dimensional resorption behavior has to be taken into account in anticipation of the subsequent insertion of dental implants. We performed 3-dimensional volume measurements of the inserted bone transplants in 11 patients (6 women and 5 men; mean age = 2.3 years) who underwent bilateral sinus floor elevation with autogenous iliac crest grafts. In order to determine the respective bone graft volumes, cone-beam computerized tomography studies of the maxillary sinuses were carried out directly after the operation (T0), as well as 3 months (T1) and 6 months (T2) postoperatively. The acquired DICOM (Digital Imaging and Communications in Medicine) data sets were evaluated using suitable analysis software. We evaluated statistical significance of graft volumes changes using a linear mixed model with the grouping factors for time, age, side, and sex with a significance level of P = .05. 38.9% of the initial bone graft volume, which amounted to 4.2 cm(3), was resorbed until T1. At T2, the average volume again decreased significantly by 18.9 % to finally reach 1.8 cm(3). The results show neither age nor side dependency and apply equally to both sexes. Without functional load, iliac bone grafts feature low-volume stability in sinus-augmentation surgery. Further clinical and animal studies should be done to detect the optimal timing for implant placement.
authors.affiliation: 1  Department of Oral, Maxillofacial and Plastic Facial Surgery, Heinrich Braun Hospital, Zwickau, Germany.|2  Department of Oral, Maxillofacial and Plastic Facial Surgery, University Hospital of the Aachen University (RWTH), Aachen, Germany.
authors.forename: Marcus
authors.initials: M
authors.lastname: Gerressen
authors.affiliation: 2  Department of Oral, Maxillofacial and Plastic Facial Surgery, University Hospital of the Aachen University (RWTH), Aachen, Germany.
authors.forename: Dieter
authors.initials: D
authors.lastname: Riediger
authors.affiliation: 3  Institute of Medical Statistics, University Hospital of the Aachen University (RWTH), Aachen, Germany.
authors.forename: Ralf-Dieter
authors.initials: RD
authors.lastname: Hilgers
authors.affiliation: 2  Department of Oral, Maxillofacial and Plastic Facial Surgery, University Hospital of the Aachen University (RWTH), Aachen, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Hölzle
authors.affiliation: 4  Department of Oral and Maxillofacial Surgery, Bremerhaven-Reinkenheide gGmbH Hospital, Bremerhaven, Germany.
authors.forename: Nelson
authors.initials: N
authors.lastname: Noroozi
authors.affiliation: 2  Department of Oral, Maxillofacial and Plastic Facial Surgery, University Hospital of the Aachen University (RWTH), Aachen, Germany.
authors.forename: Alireza
authors.initials: A
authors.lastname: Ghassemi
mesh_terms: D000818:Animals; D016025:Bone Transplantation; D002675:Child, Preschool; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007085:Ilium; D008297:Male; D008437:Maxilla; D008443:Maxillary Sinus; D010865:Pilot Projects; D059546:Sinus Floor Augmentation
chemical_list: D015921:Dental Implants
keywords: healing time; iliac crest graft; sinus lifting surgery; three-dimensional resorption