Ochsenbein bone chisel #4

The Ochsenbein Bone Chisel #4 (Article# LS1-378) is a double-ended periodontal chisel with mirror-image curved blades, each measuring 3.5 mm in width with half-circle notches beveled on each side of the blade margin. The blade angles on both working ends are oriented to provide direct access to distal surfaces of posterior teeth — the primary differentiator between the #4 and earlier variants in the Ochsenbein series. The round ringed knurled handle is machined from surgical-grade stainless steel, measuring 165 mm (6.5 inches) overall, and balances consistently at mid-handle during active push and pull strokes.

The 3.5 mm blade width on the Ochsenbein #4 makes it narrower than the #3 variant, reducing resistance during insertion into tight posterior interproximal spaces where wider blades lose maneuverability. The bilateral bevel on each semi-circular notch activates cutting on both push and pull strokes, allowing the clinician to recontour bone margins in both directions without repositioning the blade face. The stainless-steel body tolerates repeated autoclave sterilization at 134°C without blade geometry distortion or cutting-edge degradation across clinical use cycles.

Periodontists use the Ochsenbein Bone Chisel #4 during osseous resective surgery, osteoplasty, and crown lengthening procedures targeting posterior distal molar surfaces. The Ochsenbein Periodontal Chisel #4 specifically suits back-action strokes on distal furcation areas and second molar osseous defects where anterior blade angulations cannot reach without handle interference. Surgeons also use it to reflect the periosteum, remove secondary palatal flaps, and debride fiber attachments from root surfaces following extraction.

Leader Surgical produces instruments that surgical teams reach for by name — a reputation built one consistent, well-manufactured tool at a time.

Which model is best for posterior teeth?
The Ochsenbein #2 and #4 are generally preferred for posterior (back) regions. Their specific blade angles are designed to provide better clearance and leverage in the limited space of the back of the mouth.