1. Enhanced Bone Augmentation by Controlled Release of Recombinant Human Bone Morphogenetic Protein-2 from Bioabsorbable Membranes
- Author
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Young Ku, Sung Heon Nam, Chong Pyoung Chung, In Chul Rhyu, Tae Il Kim, Soo Boo Han, Yong-Moo Lee, Yang-Jo Seol, Sang Mook Choi, and Seung Jin Lee
- Subjects
Calcium Phosphates ,Polyesters ,Bone Morphogenetic Protein 2 ,chemistry.chemical_element ,Biocompatible Materials ,Calcium ,Bone morphogenetic protein ,Bone morphogenetic protein 2 ,law.invention ,Bone augmentation ,Random Allocation ,Dome (geology) ,Drug Delivery Systems ,Osteogenesis ,Transforming Growth Factor beta ,law ,Absorbable Implants ,Animals ,Humans ,Wound Healing ,Skull ,Membranes, Artificial ,Anatomy ,Controlled release ,Recombinant Proteins ,Disease Models, Animal ,Membrane ,chemistry ,Delayed-Action Preparations ,Bone Morphogenetic Proteins ,Recombinant DNA ,Periodontics ,Rabbits ,Bone Diseases ,Biomedical engineering - Abstract
865 Background: The present study was undertaken to determine the effect of recombinant human bone morphogenetic protein-2 (rhBMP-2)-loaded biodegradable membranes on bone augmentation in a rabbit calvarial model. Methods: Five µg of rhBMP-2 was loaded into a stiff hemispherical dome membrane made of poly(L-lactide) and tricalcium phosphate (PLLA/TCP). The release kinetics of rhBMP-2 from the membrane were determined in vitro using a human BMP-2 immunoassay. Twelve rhBMP-2–loaded dome membranes (test group) and 12 control dome membranes (control group) were placed on the partial-thickness calvarial defects of 24 rabbits. The animals were sacrificed at 4 and 8 weeks, and undecalcified ground sections were prepared. Newly formed bone area and height were measured histomorphometrically and calculated by percentage ratio to the total submembranous space area and height below the dome. Results: In vitro release results demonstrated that rhBMP-2 was released consistently over a 4-week period following a high initial burst release on the first day. At both 4 and 8 weeks, histomorphometric analysis revealed that the test group showed significantly higher newly formed bone heights and areas than the control group (P
- Published
- 2003