Microstructural and Strength Changes in Trabecular Bone in Elderly Patients with Type 2 Diabetes Mellitus

Area of Science:

• Orthopedics
• Endocrinology
• Bone Biology

Background:

• Type 2 diabetes mellitus (T2DM) is a global epidemic linked to higher risks of osteoporosis and fractures.
• Understanding T2DM's specific effects on bone quality is crucial for patient management.

Purpose of the Study:

• To investigate the impact of T2DM on bone microarchitecture and material properties.
• To compare bone quality in patients with and without T2DM, considering hip fracture and osteoarthritis.

Main Methods:

• A case-control study involving 140 patients (hip fracture, osteoarthritis, with/without T2DM).
• Assessment of bone mineral density (BMD), microstructural parameters (BV/TV, Tb.N, Tb.Th, SMI, Tb.Pf), and biomechanical properties (Young's modulus, toughness, stiffness, etc.) from femoral heads.

Main Results:

• Patients with hip fracture had lower BMD than osteoarthritis patients.
• T2DM groups (OP-T2DM, OA-T2DM) exhibited compromised trabecular structure (lower BV/TV, Tb.N, Tb.Th; higher SMI, Tb.Pf) compared to non-diabetic counterparts.
• Diabetic patients showed significantly reduced bone mechanical properties, including lower Young's modulus, toughness, and stiffness.

Conclusions:

• Type 2 diabetes mellitus detrimentally affects bone's structural integrity and mechanical strength.
• These bone quality deficits associated with T2DM may contribute to the elevated fracture risk observed in diabetic individuals.