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Perthes = Pretty Long Hip Recovery = 3-4 Years ⏳
Think of a long but gradual healing process of the hip.
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121. The term delayed union is employed when the fracture fails to unite within:
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“Silly Rabbits Will Play”
S → Scapula
R → Ribs
W → Wing of ilium
P → Proximal humerus (elderly)
Think of a silly rabbit hopping around - no need to tie it down (no immobilization needed).
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“CLAST eats bone with ACID” 🧪
👉 OsteoCLAST → Acid phosphatase
“BLAST builds bone with ALKALINE” 🧱
👉 OsteoBLAST → Alkaline phosphatase
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“TB makes bones THIN before they BREAK”
👉 THIN = Periarticular osteoporosis (earliest)
Or shorter: TB Hip = O → J → B → D
Osteoporosis (earliest)
Joint space narrowing
Bone erosion
Dislocation (late)
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116. If an unstable hip is detected at birth, the management policy is:
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Mnemonic (easy & memorable 😄):
“Paget DEFORMS bone”
👉 Paget = DEFORMANS
✅ Final Answer: Osteitis deformans
现已上线!2025 年 Telegram 研究 — 年度关键洞察 
