A novel experimental approach to evaluate guided bone regeneration (GBR) in the rat femur using a 3D-printed CAD/CAM zirconia space-maintaining barrier,Journal of Advanced Research

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A novel experimental approach to evaluate guided bone regeneration (GBR) in the rat femur using a 3D-printed CAD/CAM zirconia space-maintaining barrier
Journal of Advanced Research ( IF 11.4 ) Pub Date : 2020-07-23 , DOI: 10.1016/j.jare.2020.07.012
Alexandru Petre ₁ , Cornel Balta ₂ , Hildegard Herman ₂ , Sami Gharbia _{2,

3} , Ada Codreanu ₄ , Bianca Onita-Mladin ₂ , Nicoleta Anghel-Zurbau ₄ , Andrei-Gelu Hermenean ₅ , Simona-Rebeca Ignat ₃ , Sorina Dinescu ₃ , Iuliana Urzica ₆ , Sergiu Drafta ₁ , Luminita Oancea ₁ , Anca Hermenean _{2,

3,

4}

Affiliation

Introduction

Obtaining a certain bone volume is an important goal in implantology or orthopedics. Thus, after tooth extraction, quite a lot of horizontal and vertical alveolar bone is lost in time and can be detrimental to the implant treatment outcome, while the treatment of critical bone defects is a considerable challenge for surgery.

Objectives

In this study we designed a new in vivo model as an useful experimental tool to assess guided bone regeneration (GBR) using a computer-aided design/manufacturing (CAD-CAM) space-maintaining barrier.

Methods

The barrier was 3D printed with three progressive heights, surgically placed on rat femur, and GBR results were analyzed at 2, 4, and 8 weeks by X-ray and bone mineral density analysis, histology/morphometry and by immunofluorescence and immunohistochemistry for osteogenesis and angiogenesis evaluation.

Results

The obtained results show that the proposed experimental model provides a real-time useful information on progressive bone tissue formation, which depends on the volume of isolated space created for GBR and on molecular events that lead to satisfactory vertical and horizontal bone augmentation and osteointegration.

Conclusion

In conclusion, the proposed customized three-dome space-maintaining barrier is suitable as an experimental tool to assess the potential of using the designed barriers in dentistry and orthopedics to promote the formation of new bone and determine their space- and time-dependent limitations. Meanwhile, guided bone augmentation for dentistry requires subsequent evaluation on an alveolar bone preclinical model followed by clinical implementation.

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