A review of osteoinductive testing methods and sterilization processes for demineralized bone

Area of Science:

• Biomaterials Science
• Orthopedic Surgery
• Tissue Engineering

Background:

• Allogeneic demineralized bone is widely used clinically for its osteoinductive and osteoconductive properties.
• Concerns exist regarding processing and sterilization potentially impacting the efficacy of demineralized bone allografts.
• Clinicians require assurances of product potency and consistent clinical performance.

Purpose of the Study:

• To evaluate the current knowledge on the performance of allogeneic demineralized bone.
• To determine if in vitro and in vivo testing can predict clinical outcomes.
• To assess the feasibility of establishing release standards for demineralized bone allografts.

Main Methods:

• Review of existing literature on demineralized bone allograft performance.
• Analysis of data from animal and cell culture models.
• Evaluation of the correlation between laboratory tests and clinical results.

Main Results:

• Extensive data exists from animal and cell culture models for demineralized bone.
• Current in vivo and in vitro test systems cannot reliably predict the clinical performance of different demineralized bone allograft lots.
• The development of evidence-based standards for product release is challenging.

Conclusions:

• The clinical performance of demineralized bone allografts cannot be reliably concluded from current in vitro or in vivo testing.
• An osteoinductivity standard for market release may be feasible but requires subsequent clinical monitoring.
• Further research is essential to establish reliable predictors of clinical efficacy for demineralized bone allografts.