Marginal Bone‐Level Alterations at Implants Installed in Block versus Particulate Onlay Bone Grafts Mixed with Platelet‐Rich Plasma in Atrophic Maxilla. A Prospective 5‐Year Follow‐Up Study of 15 Patients
- 4 August 2011
- journal article
- research article
- Published by Wiley in Clinical Implant Dentistry and Related Research
- Vol. 15 (1), 7-14
- https://doi.org/10.1111/j.1708-8208.2011.00377.x
Abstract
Extensive atrophy of the alveolar process may require a bone-grafting procedure prior to implant treatment. Autogenous bone grafts from the iliac crest, used as onlay block and particulate bone, have been used together with sinus-lift procedure in order to rehabilitate patients with extremely resorbed maxillae. However, there are to our knowledge no 5-year follow-up studies evaluating the extent of bone-level change in patients treated with respectively block and particulate autogenous bone grafts. The purpose of this prospective clinical study was to conduct a 5-year follow-up analysis with focus on bone-level alteration in block versus particulate onlay bone grafts. Fifteen out of originally 19 patients who were treated with iliac bone grafts and oral implants in the maxilla have been followed through the first 5 postoperative years. In a first study conducted on 19 patients, the role of platelet-rich plasma in conjunction with autogenous bone was evaluated. In this 5-year follow-up study, the marginal bone alterations have been documented at base line, 1 year and 5 years of loading to the nearest 0,1 mm at mesial and distal surfaces of the implants. Two implants were installed on each side of the midline in either block or particulate bone grafts giving test and control sides in each patient. Additionally, two implants on each side were installed in residual bone/grafted sinus floor. Marginal bone alteration in the anterior maxilla appeared larger at the side augmented by block bone at baseline, and after 1 and 5 years of loading, but the change was not statistically significant. Moreover, there was a significantly higher degree of marginal alteration during the first year of loading, compared with the examinations after 5 years. The present follow-up study showed that there is no significant difference in the extension of resorption between block- and particulate autogenous bone grafts over a 5-year period. Most of the resorption occurred during the first year in function.Keywords
This publication has 19 references indexed in Scilit:
- A New Technique for Reconstruction of the Atrophied Narrow Alveolar Crest in the Maxilla Using Morselized Impacted Bone Allograft and Later Placement of Dental ImplantsClinical Implant Dentistry and Related Research, 2008
- Reconstruction of the Atrophic Edentulous Maxilla with Free Iliac Crest Grafts and Implants: A 3‐Year Report of a Prospective Clinical StudyClinical Implant Dentistry and Related Research, 2007
- Maxillary Sinus Augmentation With Different Biomaterials: A Comparative Histologic and Histomorphometric Study in ManImplant Dentistry, 2006
- A clinical study of changes in the volume of bone grafts in the atrophic maxillaDento maxillo facial radiology, 2001
- Bone grafting to the maxillary sinus from the lateral side of the mandibleBritish Journal of Oral and Maxillofacial Surgery, 2000
- The influence of simultaneous versus delayed placement on the stability of titanium implants in onlay bone graftsInternational Journal of Oral & Maxillofacial Surgery, 1999
- The influence of simultaneous versus delayed placement on the stability of titanium implants in onlay bone grafts. A histologic and biomechanic study in the rabbitInternational Journal of Oral & Maxillofacial Surgery, 1999
- Bovine hydroxyapatite for maxillary sinus grafting: comparative histomorphometric findings in sheepClinical Oral Implants Research, 1998
- Maxillary sinus augmentation using mandibular bone grafts and simultaneous installation of implants. A surgical techniqueClinical Oral Implants Research, 1991
- Repair of Bone GraftsScandinavian Journal of Plastic and Reconstructive Surgery, 1980