Yes, it is possible to repair a broken root canal-treated molar in most cases, as long as the tooth root and supporting bone are in good condition.
The type of treatment will depend on the severity of the fracture, how much tooth structure remains, and whether there is any infection.
Thanks to advances in restorative dentistry and adhesive materials, it is possible to restore both the chewing function and the aesthetic appearance of the treated tooth.
What does it mean to have a broken molar after a root canal?
When a molar has undergone root canal treatment, the dental pulp is removed, which reduces the tooth’s natural hydration.
This causes the tooth to become more fragile and prone to fractures. If the molar breaks after a root canal, it is usually due to one of the following reasons:
- A crown or inlay was not placed after the treatment.
- There was a very strong bite or chewing trauma.
- The previous restoration material wore down or leaked.
- There is untreated bruxism (teeth grinding).
A fracture in a root canal-treated molar does not always mean the tooth is lost. With the right diagnosis, most cases can be successfully resolved.
Types of fractures in a root canal-treated molar
Not all fractures are the same, and their severity will determine the type of solution.
Here are the most common types:
- Superficial fracture (enamel or cusp): This is the mildest form. It usually affects a small part of the tooth and does not compromise the root or the seal of the root canal. It can be easily repaired with resin or composite.
- Moderate fracture (dental crown): Affects a larger portion, sometimes reaching the base of the crown. In these cases, a post and crown reconstruction is required to reinforce the structure and protect the root.
- Deep fracture (vertical or root): This is the most severe, as it involves the tooth root. When this happens, the tooth cannot be saved, and extraction is recommended, followed by replacement with a dental implant or bridge.
Identifying the type of fracture through X-rays or 3D scans is essential before deciding on treatment.
Treatment options for a root canal-treated molar
The choice of treatment depends on the extent of the damage and the condition of the root:
- Composite resin reconstruction: Ideal for small fractures. It restores the shape and function of the tooth in a single visit.
- Post and crown placement: When the remaining tooth structure is minimal, a post is placed inside the root canal and a porcelain or zirconia crown is placed over the tooth to protect it.
- Inlays or ceramic veneers: Aesthetic, durable, and less invasive options for partial restorations.
- Retreatment (Re-root canal): If the fracture caused leakage or infection in the root, the root canal treatment may need to be redone before reconstruction.
- Dental implant: In cases where the tooth is not viable, an implant is the best long-term functional and aesthetic alternative.
The dentist will determine the ideal option after a clinical and radiographic evaluation.
When is it not possible to repair a root canal-treated broken molar?
Although many root canal-treated teeth can be saved, there are cases where the fracture is so severe that repair is not viable.
This happens when:
- The fracture reaches the root or runs vertically through the tooth.
- There is a chronic infection or bone resorption.
- The tooth has advanced mobility or significant loss of bone support.
- The remaining structure does not allow for a stable crown to be placed.
In such situations, extraction and placement of a dental implant is the most predictable treatment to preserve chewing function and bone health.
Does it hurt to rebuild a root canal-treated tooth?
No. The treated tooth no longer has a nerve, so the procedure is usually painless. In some cases, local anesthesia may be used for added comfort.
How long does the reconstruction take?
It depends on the case. A resin restoration can be done in a single appointment, while a crown or inlay may require 2 or 3 visits.
Conclusion
In short, repairing a broken root canal-treated molar is key to preserving the tooth and avoiding future complications.
This procedure reinforces the tooth from the inside, restores its shape, and gives it the strength needed to handle daily chewing.
If you’re looking for a professional, durable, and aesthetic treatment, at Crooke Dental Clinic you will find specialists in endodontics and restorative dentistry who combine advanced technology with a conservative approach.