This 2007 theoretical paper by Giannoudis et al. argues that the standard tissue engineering framework for fracture healing — built on growth factors, scaffolds, and mesenchymal stem cells — is incomplete. The paper asks whether mechanical stability deserves equal standing as a fourth pillar, and proposes the 'diamond concept' as a replacement framework.
When managing a nonunion or planning bone grafting, the diamond concept is a checklist: confirm you have addressed all four elements — adequate MSCs, appropriate growth factor milieu, suitable scaffold, and mechanically stable fixation.
Neglecting any single pillar — especially stability — compromises the others regardless of how sophisticated the biological strategy is.
This 2007 theoretical paper by Giannoudis et al. argues that the standard tissue engineering framework for fracture healing — built on growth factors, scaffolds, and mesenchymal stem cells — is incomplete. The paper asks whether mechanical stability deserves equal standing as a fourth pillar, and proposes the 'diamond concept' as a replacement framework.
When managing a nonunion or planning bone grafting, the diamond concept is a checklist: confirm you have addressed all four elements — adequate MSCs, appropriate growth factor milieu, suitable scaffold, and mechanically stable fixation.
Neglecting any single pillar — especially stability — compromises the others regardless of how sophisticated the biological strategy is.