Following a tumor or cyst removal, or in the case of fracture repair, the remaining void must be filled in order for healing to occur. There are many options for filling bone voids, ranging from autogenous bone, to allograft bone to synthetic fillers- each with benefits and drawbacks. Each surgical procedure is unique and, therefore, the best course of treatment should be evaluated on a case-by-case basis. Here's an overview of the options:
Autogenous Cancellous Bone
Autogenous cancellous bone is bone that is harvested from the patient's own body, typically from the iliac crest. It is the standard against which all other bone void filler options are compared. Pros: Osteogenic, osteoinductive and osteoconductive- effectively stimulates bone repair. Cons: Procurement morbidity, limited availability and increased operative time.
Allograft is bone material that has been donated from another human body. Allograft is a common alternative to autograft when autografting is not possible or recommended. Pros: Structural (if mineralized), osteoconductive (if demineralized). Cons: Inconsistent results, non-structural, potential for disease transfer or patient immune response.
Synthetic Bone Void Fillers
Synthetic bone void fillers are osteoconductive, are consistent, high-quality materials with no biologic hazards and, once repaired, defect sites are comparable to cancellous bone.
What is a Bone Void Filler (BVF)?
Bone void fillers are absorbable, biocompatible, bioactive and osteoconductive biologic materials that are used to fill gaps and voids of the skeletal system such as extremities, posterolateral spine and pelvis.
Bone void fillers are intended to provide stability and increase cell proliferation, which can result in enhanced bone regeneration in various orthopedic applications.
Types of Bone Void Filler
Calcium phosphate-based bone void fillers have increased porosity/particle size, which translates to increased mechanical strength. However, this also increases the material resorption time- meaning that bone growth is delayed.
Calcium sulfate-based bone void fillers have decreased porosity/particle size, which means that the product is resorbed by the body more quickly. However, this results in a decreased mechanical strength, which is important during the bone healing phase.
Magnesium Phosphate (Mg OSTEO Technology)
Magnesium phosphate-based bone void fillers maintain the optimal porosity/particle size, meaning that there is increased mechanical strength during the critical bone healing phase, and it remodels into bone in a timely manner.
Injectable & Moldable
Optimized consistency for use in multiple orthopedic applications
Temperature Setting Control
Allows for optimal workability and curing time
Product easily identifiable
Excellent Binding Characteristics
Optimal product stability and fixation at operative site
Fully Synthetic Material
Enhanced quality control and product availablity with reduced patient morbidity
Easily manageable curing time allowing for intraoperative flexibility and reduction of waste
High Compressive Strength
Surface topography to support bone formation, enhancing structural stability and biocompatibility
Enhanced Bone Regeneration
Greater than 80% bone remodeling in 26 weeks*
* All claims based on critically sized rabbit lateral condyle defect model. It is unknown how results from the rabbit model compare with clinical results in humans.