Why do you need a collapsible option?
In molars, the canals diverge at an angle, and a solid inlay simply cannot be inserted into them - it will jam. A collapsible inlay solves this problem: first, the main part is inserted into the channel, then an additional pin is inserted through a hole in it into the diverging channel. This way the structure is securely fixed in two roots at once and can withstand the chewing load of the molar.
What is a stump pin insert
This is an individually cast structure made of two parts: a post, which fits into the root canal, and a stump, which protrudes above the gum and serves as a support for the crown. Essentially, the doctor re-creates the stump of a destroyed tooth.
Unlike a standard post with a composite superstructure, a cast inlay precisely follows the shape of the canal and evenly distributes the load - the risk of root splitting is noticeably lower.
When to use it
- the crown part of the tooth is destroyed by more than two thirds
- the tooth is already pulpless and the canals are qualitatively sealed
- you need reliable support for a single crown or bridge
- the root walls are of sufficient thickness according to the image data
How is production carried out?
On the first visit, the canal is unfilled to the required depth and a bed for the inlay is formed, then an impression is taken. The laboratory casts a metal inlay or makes a zirconium one. On the second visit, they try it on, check the fit using a photograph and fix it with cement, after which they grind it down for a crown.