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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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Poly(lactic acid/caprolactone) bilayer membrane achieves bone regeneration through a prolonged barrier function.

Gabriela L Abe1,2, Jun-Ichi Sasaki1, Ririko Tsuboi3

  • 1Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, Osaka, Japan.

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|January 22, 2024
PubMed
Summary

A novel slow-degrading bilayer membrane made of poly(lactic acid/caprolactone) (PLCL) shows promise for guided bone regeneration (GBR). This biomaterial offers prolonged barrier function, enhancing bone volume recovery and alveolar ridge preservation in animal models.

Keywords:
barrier membranebilayer membraneguided bone regenerationpolycaprolactonepolylactic acid

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Oral Surgery

Background:

  • Guided bone regeneration (GBR) is crucial for bone volume restoration.
  • Barrier membranes are essential GBR components, with properties influencing outcomes.
  • Current membranes have limitations in degradation rate and barrier function duration.

Purpose of the Study:

  • To evaluate an experimental, slow-degrading, bilayer barrier membrane composed of poly(lactic acid/caprolactone) (PLCL) for GBR applications.
  • To compare the efficacy of the PLCL membrane against commercial collagen (Col) and poly(lactic-co-glycolic acid) (PLGA) membranes in vivo.
  • To assess the biodegradability, barrier function, and bone regeneration capacity of the PLCL membrane.

Main Methods:

  • A slow-degrading bilayer PLCL membrane was synthesized.
  • Biodegradability was assessed via subcutaneous implantation in rats.
  • Barrier function was evaluated in rat calvaria defects, comparing PLCL with Col and PLGA membranes.
  • Bone regeneration was assessed in beagle dog alveolar bone defects using GBR protocols.

Main Results:

  • The PLCL membrane exhibited slow biodegradation and provided prolonged barrier function compared to commercial membranes.
  • This extended barrier function facilitated space creation and enhanced bone regeneration.
  • Significantly greater bone regeneration and continuous alveolar ridge contour were observed with the PLCL membrane in the dog model.

Conclusions:

  • The PLCL bilayer membrane demonstrates effective, slow degradation and sustained barrier function.
  • It significantly enhances bone regeneration and alveolar ridge preservation in GBR applications.
  • The PLCL membrane is a promising biomaterial for GBR, offering improved outcomes over current commercial options.