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Osteotome and Mallet

The osteotome is a chisel-like cutting instrument driven by a surgical mallet to produce clean, straight bone cuts. The oldest and simplest bone-cutting method in orthopedic surgery — retained because it still produces better-quality cortical bone cuts than any powered alternative.

Osteotome Design​

  • Flat or curved blade with a bevel on one or both sides
    • Single-bevel (chisel) — one flat face, one beveled face; cuts in one direction preferentially
    • Double-bevel (osteotome proper) — symmetrical bevels; cuts in line with the handle axis
  • Straight metal handle with a striking surface at the proximal end
  • Various blade widths (typically 6–25 mm) and curves
  • Common variants: Lambotte, Stille, Smith-Petersen osteotomes

Mallet / Surgical Hammer​

  • Stainless steel or nylon-faced mallet — nylon face reduces noise and rebound
  • Weight typically 225–450 g
  • Non-marring surface to avoid damaging the osteotome handle
  • Common variant: Mead mallet

Use in Reconstructive Urology​

  • Partial pubectomy for urethropubic fistula with osteomyelitis — osteotome makes the initial defined bone cut; rongeur completes the removal
  • PFUI reconstruction with inferior pubectomy — osteotome defines the cut line for controlled bone removal
  • Inferior pubectomy to expose the membranous urethra in deep posterior urethroplasty — straight cortical cut with osteotome, then rongeur finishes

Technique​

  • Periosteal stripping first — expose the target bone with a periosteal elevator
  • Osteotome tip positioned at the intended cut line, angle defined by the desired cut direction
  • Controlled mallet strikes — firm, confident taps; each strike advances the blade a small increment
  • Progressive deepening — avoid single hard strikes that can cause unpredictable propagating fractures
  • Redirect if binding — a stuck osteotome usually means the angle is wrong, not that a harder strike is needed

Advantages over Powered Drills​

  • Clean cortical cuts — osteotome cuts produce a cleaner bone edge than a burr, which can melt / thermally damage cortical bone
  • No thermal necrosis — no heat generation
  • No bone dust — the bone comes off in fragments, not aerosolized particulate
  • Cheaper, simpler, universally available

Disadvantages​

  • Slower than powered drill for bulk bone removal
  • Operator-dependent — the quality of the cut depends on mallet technique
  • Vibration transfer — uncomfortable for the patient under conscious sedation; nearly irrelevant under GA
  • Noise — the hammer-on-handle sound can be disruptive for awake-adjacent OR personnel

See also: Rongeur, Air Drill, Periosteal Elevator, Urethropubic Fistula, PFUI.