The relationship between osteoarthritis and osteoporosis

Area of Science:

• Gerontology
• Orthopedics
• Rheumatology

Background:

• Osteoarthritis (OA) and osteoporosis (OP) are prevalent skeletal disorders in aging populations.
• The relationship between OA and OP remains controversial, with prior studies suggesting an inverse correlation.

Purpose of the Study:

• To review and synthesize literature on the OA-OP relationship.
• To address key questions regarding bone mineral density (BMD) in OA and vice versa.
• To explore the influence of OA on OP progression and fracture risk.

Main Methods:

• Systematic literature review and analysis.
• Examination of cross-sectional and individual bone data.
• Inquiry into the impact of BMD on OA incidence and progression.

Main Results:

• OA generally shows an inverse relationship with OP.
• BMD in appendicular joints affected by OA may decrease, especially in upper extremities.
• Low lumbar spine BMD correlates with lower knee OA incidence but doesn't halt its progression.
• High BMD in OA patients does not negate fracture risk, potentially due to factors like postural instability.

Conclusions:

• The OA-OP relationship is nuanced and site-specific.
• High BMD does not universally protect against fractures in OA patients.
• Further research into underlying mechanisms is warranted to clarify these complex interactions.