The Influences of Different Ratios of Biphasic Calcium Phosphate and Collagen Augmentation on Posterior Lumbar Spinal Fusion in Rat Model.
10.3349/ymj.2017.58.2.407
- Author:
Kyung Hyun KIM
1
;
Jeong Yoon PARK
;
Hyo Suk PARK
;
Keun Su KIM
;
Dong Kyu CHIN
;
Yong Eun CHO
;
Sung Uk KUH
Author Information
1. Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine, Seoul, Korea. kuhsu@yuhs.ac
- Publication Type:Original Article
- Keywords:
Biphasic calcium phosphate;
collagen;
fusion;
rat;
β-TCP;
hydroxyapatite
- MeSH:
Animals;
Calcium*;
Collagen*;
Durapatite;
Models, Animal*;
Palpation;
Rats*;
Spinal Fusion*;
Transplants;
X-Ray Microtomography
- From:Yonsei Medical Journal
2017;58(2):407-414
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To determine the influence of different ratios of hydroxyapatite (HA)/beta tricalcium phosphate (β-TCP) and collagen augmentation for posterior lumbar fusion in a rat model. MATERIALS AND METHODS: We generated a posterior lumbar fusion model in 50 rats and divided it into five groups of equal number as follows; 1) autologous bone graft as group A, 2) 70% HA+30% β-TCP as group B, 3) 70% HA+30% β-TCP+collagen as group C, 4) 30% HA+70% β-TCP as group D, and 5) 30% HA+70% β-TCP+collagen as group E. Rats were euthanized at 12 weeks after surgery and fusion was assessed by manual palpation, quantitative analysis using microCT and histology. RESULTS: The score of manual palpation was significantly higher in group C than group E (3.1±1.1 vs. 1.8±0.8, p=0.033). However, in terms of microCT analysis, group D showed significantly higher scores than group B (5.5±0.8 vs. 3.1±1.1, p=0.021). According to quantitative volumetric analysis, 30% HA+70% β-TCP groups (group D and E) showed significantly reduced fusion mass at 12 weeks after surgery (123±14.2, 117±46.3 vs. 151±27.3, p=0.008, 0.003, respectively). Collagen augmentation groups revealed superior results in terms of both microCT score and histologic grade. CONCLUSION: A 7:3 HA/β-TCP ratio with collagen augmentation rather than a 3:7 HA/β-TCP ratio could be a more favorable graft substitute for lumbar spinal fusion. There was positive role of collagen as an adjunct for spinal bone fusion process.
