Which statement correctly describes the purpose of creating a glide path in canal preparation?

Which statement correctly describes the purpose of creating a glide path in canal preparation?

• A. To widen canal to large size.
• B. To measure canal length.
• C. To remove smear layer.
• D. To create a smooth, negotiable path to the apical constriction.

Answer: (A)

The function of a glide path is to establish a smooth, negotiable channel from the canal orifice to the apical constriction using small, flexible files. This path guides subsequent shaping and allows larger, more rigid instruments (like rotary NiTi files) to follow the canal’s natural curvature safely, reducing the risk of ledges, transport, or instrument separation. It also helps with predictable working length determination because the canal is already instrumented to a gentle, unobstructed path. The glide path is not about widening the canal to a large size, nor is it meant for measuring canal length or removing the smear layer—those outcomes are achieved by separate steps and tools (length measurement techniques and irrigants/chelation, respectively).

The function of a glide path is to establish a smooth, negotiable channel from the canal orifice to the apical constriction using small, flexible files. This path guides subsequent shaping and allows larger, more rigid instruments (like rotary NiTi files) to follow the canal’s natural curvature safely, reducing the risk of ledges, transport, or instrument separation. It also helps with predictable working length determination because the canal is already instrumented to a gentle, unobstructed path. The glide path is not about widening the canal to a large size, nor is it meant for measuring canal length or removing the smear layer—those outcomes are achieved by separate steps and tools (length measurement techniques and irrigants/chelation, respectively).