What is Type 2 DBM?
There is no established classification system that defines "Type 2 DBM" in the medical literature or clinical practice. The term does not appear in current guidelines, FDA classifications, or research nomenclature for demineralized bone matrix products.
Understanding DBM Classification
Demineralized bone matrix (DBM) is an allograft bone graft material created by removing the mineral component from donor bone through acid treatment, leaving behind a collagen-rich scaffold with osteoinductive growth factors 1. However, DBM products are not classified by numbered types (Type 1, Type 2, etc.).
How DBM Products Are Actually Categorized
DBM products differ based on several characteristics, but these do not follow a "type" numbering system:
Product Form Categories:
- Fiber-based formulations - contain longer collagen fibers
- Particulate-based formulations - contain smaller bone particles
- Carrier systems - putty, paste, gel, strips, or injectable forms 2, 3
- Structural grafts - maintain three-dimensional architecture 4
Processing Differences:
- Sterilization method - aseptic processing vs. terminal irradiation 2
- Particle size - large (1-2mm), medium (0.5-1mm), or small (<0.5mm) 5
- Bone source - cortical vs. cancellous bone origin 6
Quality Control Variations:
- Some products (DBX, AlloSync) include lot-specific osteoinductivity testing
- Others (AlloMatrix, OrthoBlast II, Grafton) focus on carrier optimization 4
Clinical Context
If you encountered "Type 2 DBM" in a specific context, it may represent:
- A manufacturer's internal product designation
- A misinterpretation of DBM formulation differences
- Confusion with other bone graft classification systems
Practical Recommendation
When selecting DBM products, focus on evidence-based characteristics rather than seeking a "type" classification: