Paget disease of bone is a chronic disorder in which accelerated bone remodelling leads to bone that is larger, more vascular, and more metabolically active than normal -- but structurally weaker and more deformed. It typically affects the pelvis, spine, femur, tibia, and skull, with lower limb involvement being the most functionally significant for mobility. It is primarily a disease of older adults (over 55), with prevalence increasing with age.
How Paget Disease Affects Mobility
Bone pain: Pagetic bone is painful, particularly on weight bearing in lower limb sites. Tibial and femoral Paget disease cause aching deep bone pain that worsens with walking and standing.
Deformity: The excessive and disorganised bone remodelling causes characteristic deformities. The tibia becomes bowed anteriorly (anterior bowing), and the femur may show coxa vara (reduced angle of the femoral neck). These deformities alter the mechanical axis of the lower limb, redistribute loading across the knee and hip, and change the effective limb length and gait pattern.
Osteoarthritis: Secondary OA is common in joints adjacent to Pagetic bone. Pagetic femur causes hip OA; Pagetic tibia contributes to knee OA. The altered bone geometry generates abnormal joint contact patterns that accelerate cartilage degeneration.
Fracture risk: Pagetic bone, despite being denser than normal in some ways, has a higher fracture risk -- particularly incomplete cortical fractures on the convex surface of bowed long bones (chalk-stick fractures in the tibia, subtrochanteric fractures in the femur).
Neurological complications: Spinal Paget disease can cause spinal stenosis from bone overgrowth, and skull base Paget can compress cranial nerves -- neither directly relevant to cane use but affecting the overall clinical picture.
Walking Cane Function in Paget Disease
- Load reduction in affected limbs: Reducing weight bearing on a Pagetic tibia or femur (15-20% per step) directly reduces bone pain during walking and may reduce mechanical stress at incomplete fracture sites
- Gait compensation: The altered gait from bowing and deformity shifts loading to compensate. A cane provides stability during this altered gait pattern
- Fall prevention: The elevated fracture risk makes fall prevention relatively more important in Paget disease than in patients with equivalent mobility impairment but normal bone
Paget Disease Activity and Cane Need
| Disease Phase | Dominant Symptom | Cane Role |
|---|---|---|
| Active (elevated ALP, active remodelling) | Bone pain, warmth over affected site | Load reduction on active bone site |
| Treated (bisphosphonate) and suppressed | Pain improving but deformity persistent | Gait compensation for fixed deformity |
| Secondary OA established | Joint pain, OA symptoms | Standard OA cane guidance applies |
| Incomplete fracture present | Acute sharp pain at fracture site | Essential -- reduce loading at fracture site |
Medical Treatment and Cane Interaction
Bisphosphonate therapy (the primary treatment for active Paget disease) suppresses the accelerated remodelling and can substantially reduce bone pain. As pain reduces with treatment, the need for a cane may reduce -- this should be reassessed every 6-12 months during active treatment phases.
View the full DaiWalk cane range and use the cane length calculator. Related: Walking Cane for Osteoporosis | Walking Cane for Hip and Knee Osteoarthritis
