Insertion Torque
The rotational force, measured in Newton-centimetres (Ncm), required to seat a dental implant to its final position in the prepared bone site.
Full Definition
Insertion torque is a clinical measurement recorded at the moment a dental implant reaches its final depth in the osteotomy, reflecting the compressive resistance of the surrounding bone. It is expressed in Newton-centimetres (Ncm) and serves as a proxy indicator of primary stability. Values above 35 Ncm are commonly cited as supportive of immediate loading protocols, though thresholds vary by system and clinician preference. Excessively high insertion torque (>70 Ncm) may cause bone necrosis due to compressive stress. Editors should verify that the unit 'Ncm' is correctly formatted and not confused with 'Nm' (Newton-metres).
Usage
Usage note: Always express in Ncm, not Nm. Distinguish from 'removal torque', which is a separate measurement used in research to assess osseointegration after healing.
In Context
- "An insertion torque of 50 Ncm was recorded, and the clinician proceeded with same-day crown placement." — Case report
- "Insertion torque should be documented in the operative notes for all implant placements." — Clinical protocol document