A polycaprolactone-β-tricalcium phosphate-heparan sulphate device for cranioplasty
Copyright © 2018 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved..
BACKGROUND: Cranioplasty is a surgical procedure used to treat a bone defect or deformity in the skull. To date, there is little consensus on the standard-of-care for graft materials used in such a procedure. Graft materials must have sufficient mechanical strength to protect the underlying brain as well as the ability to integrate and support new bone growth. Also, the ideal graft material should be individually customized to the contours of the defect to ensure a suitable aesthetic outcome for the patient.
PURPOSE: Customized 3D-printed scaffolds comprising of polycaprolactone-β-tricalcium phosphate (PCL-TCP) have been developed with mechanical properties suitable for cranioplasty. Osteostimulation of PCL-TCP was enhanced through the addition of a bone matrix-mimicking heparan sulphate glycosaminoglycan (HS3) with increased affinity for bone morphogenetic protein-2 (BMP-2). Efficacy of this PCL-TCP/HS3 combination device was assessed in a rat critical-sized calvarial defect model.
METHOD: Critical-sized defects (5 mm) were created in both parietal bones of 19 Sprague Dawley rats (Male, 450-550 g). Each cranial defect was randomly assigned to 1 of 4 treatment groups: (1) A control group consisting of PCL-TCP/Fibrin alone (n = 5); (2) PCL-TCP/Fibrin-HSft (30 μg) (n = 6) (HSft is the flow-through during HS3 isolation that has reduced affinity for BMP-2); (3) PCL-TCP/Fibrin-HS3 (5 μg) (n = 6); (4) PCL-TCP/Fibrin-HS3 (30 μg) (n = 6). Scaffold integration and bone formation was evaluated 12-weeks post implantation by μCT and histology.
RESULTS: Treatment with PCL-TCP/Fibrin alone (control) resulted in 23.7% ± 1.55% (BV/TV) of the calvarial defect being filled with new bone, a result similar to treatment with PCL-TCP/Fibrin scaffolds containing either HSft or HS3 (5 μg). At increased amounts of HS3 (30 μg), enhanced bone formation was evident (BV/TV = 38.6% ± 9.38%), a result 1.6-fold higher than control. Further assessment by 2D μCT and histology confirmed the presence of enhanced bone formation and scaffold integration with surrounding host bone only when scaffolds contained sufficient bone matrix-mimicking HS3.
CONCLUSION: Enhancing the biomimicry of devices using a heparan sulphate with increased affinity to BMP-2 can serve to improve the performance of PCL-TCP scaffolds and provides a suitable treatment for cranioplasty.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:47 |
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| Enthalten in: |
Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery - 47(2019), 2 vom: 26. Feb., Seite 341-348 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Le, Bach Quang [VerfasserIn] |
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| Links: |
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| Themen: |
24980-41-4 |
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| Anmerkungen: |
Date Completed 10.06.2019 Date Revised 13.06.2019 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jcms.2018.11.013 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM292091397 |
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| 100 | 1 | |a Le, Bach Quang |e verfasserin |4 aut | |
| 245 | 1 | 2 | |a A polycaprolactone-β-tricalcium phosphate-heparan sulphate device for cranioplasty |
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| 500 | |a Date Revised 13.06.2019 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2018 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved. | ||
| 520 | |a BACKGROUND: Cranioplasty is a surgical procedure used to treat a bone defect or deformity in the skull. To date, there is little consensus on the standard-of-care for graft materials used in such a procedure. Graft materials must have sufficient mechanical strength to protect the underlying brain as well as the ability to integrate and support new bone growth. Also, the ideal graft material should be individually customized to the contours of the defect to ensure a suitable aesthetic outcome for the patient | ||
| 520 | |a PURPOSE: Customized 3D-printed scaffolds comprising of polycaprolactone-β-tricalcium phosphate (PCL-TCP) have been developed with mechanical properties suitable for cranioplasty. Osteostimulation of PCL-TCP was enhanced through the addition of a bone matrix-mimicking heparan sulphate glycosaminoglycan (HS3) with increased affinity for bone morphogenetic protein-2 (BMP-2). Efficacy of this PCL-TCP/HS3 combination device was assessed in a rat critical-sized calvarial defect model | ||
| 520 | |a METHOD: Critical-sized defects (5 mm) were created in both parietal bones of 19 Sprague Dawley rats (Male, 450-550 g). Each cranial defect was randomly assigned to 1 of 4 treatment groups: (1) A control group consisting of PCL-TCP/Fibrin alone (n = 5); (2) PCL-TCP/Fibrin-HSft (30 μg) (n = 6) (HSft is the flow-through during HS3 isolation that has reduced affinity for BMP-2); (3) PCL-TCP/Fibrin-HS3 (5 μg) (n = 6); (4) PCL-TCP/Fibrin-HS3 (30 μg) (n = 6). Scaffold integration and bone formation was evaluated 12-weeks post implantation by μCT and histology | ||
| 520 | |a RESULTS: Treatment with PCL-TCP/Fibrin alone (control) resulted in 23.7% ± 1.55% (BV/TV) of the calvarial defect being filled with new bone, a result similar to treatment with PCL-TCP/Fibrin scaffolds containing either HSft or HS3 (5 μg). At increased amounts of HS3 (30 μg), enhanced bone formation was evident (BV/TV = 38.6% ± 9.38%), a result 1.6-fold higher than control. Further assessment by 2D μCT and histology confirmed the presence of enhanced bone formation and scaffold integration with surrounding host bone only when scaffolds contained sufficient bone matrix-mimicking HS3 | ||
| 520 | |a CONCLUSION: Enhancing the biomimicry of devices using a heparan sulphate with increased affinity to BMP-2 can serve to improve the performance of PCL-TCP scaffolds and provides a suitable treatment for cranioplasty | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a BMP-2 | |
| 650 | 4 | |a Calvarial defect | |
| 650 | 4 | |a Glycosaminoglycans | |
| 650 | 4 | |a Heparan sulphate | |
| 650 | 4 | |a PCL-TCP | |
| 650 | 7 | |a Calcium Phosphates |2 NLM | |
| 650 | 7 | |a Polyesters |2 NLM | |
| 650 | 7 | |a beta-tricalcium phosphate |2 NLM | |
| 650 | 7 | |a polycaprolactone |2 NLM | |
| 650 | 7 | |a 24980-41-4 |2 NLM | |
| 650 | 7 | |a Heparitin Sulfate |2 NLM | |
| 650 | 7 | |a 9050-30-0 |2 NLM | |
| 700 | 1 | |a Rai, Bina |e verfasserin |4 aut | |
| 700 | 1 | |a Hui Lim, Zophia Xue |e verfasserin |4 aut | |
| 700 | 1 | |a Tan, Tuan Chun |e verfasserin |4 aut | |
| 700 | 1 | |a Lin, Tingxuan |e verfasserin |4 aut | |
| 700 | 1 | |a Lin Lee, Jaslyn Jie |e verfasserin |4 aut | |
| 700 | 1 | |a Murali, Sadasivam |e verfasserin |4 aut | |
| 700 | 1 | |a Teoh, Swee Hin |e verfasserin |4 aut | |
| 700 | 1 | |a Nurcombe, Victor |e verfasserin |4 aut | |
| 700 | 1 | |a Cool, Simon McKenzie |e verfasserin |4 aut | |
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