Emergency treatment of a fractured molar

Accidents don’t ask for an appointment… they just happen! It’s very common, in a dental office, to have emergency sessions. Sometimes a prescription of an antibiotic, or an emergency pulpectomy can be enough to relieve pain, but sometimes you may need to find a solution for a more complex problem.
This young lady came to the office because of a fracture of her upper right first molar. Tooth 16 was root canal treated and it had been restored with a direct composite build-up. The mesio-palatal cusp was missing, and the fracture line was deep into the gingival sulcus. We decided to schedule a crown lengthening, a root canal retreatment, a fiber post restoration, and then a crown. Unfortunately we didn’t have the chance to arrange the procedure in a reasonable time, so we had to do something immediately, without the help of the lab technician for the temporary crown. That’s why having a self-curing resin to fabricate durable temporary restoration is mandatory in a dental office.

style italiano styleitaliano subgingival cusp fracture

A close-up picture of the fracture line. Probing depth was 3 mm.

style italiano styleitaliano pre-treatment build-up of palatal cusp

First of all, a composite direct “mock-up” was done to restore the shape of the molar, without putting any adhesive system. Then an alginate impression was taken.

style italiano styleitaliano flap elevation for crown lengthening

A flap was opened to perform a surgical crown lengthening.

style italiano styleitaliano rubber dam isolation of deep margin

After suturing, isolation was performed using the rubber dam.

style italiano styleitaliano access cavity for retreatment

The old restoration and some caries were removed.

style italiano styleitaliano endodontic access cavity of upper first molar

The old canal obturation was removed, and the retreatment was performed.

style italiano styleitaliano obturated canal orifices

After retreatment, the tooth was ready for a new build-up, this time with a fiber post restoration, in order to decrease the chances of a non restorable fracture. The dowel space was prepared with a calibrated bur at low speed, and the correctly sized fiber post (LuxaPost) was chosen. It’s important to do so, because we need to have the less possible space in between the canal wall and the post, but we still need the post to be completely passive.

style italiano styleitaliano post core build up after retreatment

A dual-cure universal adhesive was used (LuxaBond Universal). It is extremely important to have a chemical activation of the adhesive in the canal; even if the post is translucent, we can’t rely on a simple light activation. We also must pay attention in carefully applying the adhesive all over the tooth, so using specific small microbrushes is highly recommended. We have to remember that adhesion is the most crucial part, for an adhesive restoration! If the adhesive layer fails, the restoration fails.
A dual-cure composite material (LuxaCore Z) was used to cement the post, and, at the same time, build-up the tooth. It’s essential to choose the ideal material to do so. We both need chemical activation, and light activation, so we can cure it and then we rely on the chemical process to complete the procedure. We also need a well mixed flowable material, with a practical and functional application tip, in order not to leave bubbles nor voids. At the same time, we need the cured material to be hard, strong and resistant, in order to support the future prosthetic crown.

style italiano styleitaliano abutment preparation after crown lengthening

After rubber dam removal, the tooth was vertically prepared into an abutment. I find it really important to have a restoration material with a dentin-like feel during preparation, to make final abutment precision easier to achieve.

style italiano styleitaliano alginate impression

A high-strength self-curing material (LuxaCrown) was injected directly into the alginate impression, and the tray was positioned back in the mouth, after isolating the abutment with vaseline.

style italiano styleitaliano provisional resin crown

After waiting for the material to set, the tray was removed and the crown easily finished. Occlusion was checked, and then the temporary was polished.

style italiano styleitaliano provisional resin crown

Occlusal view.

style italiano styleitaliano provisional crown restoration after removal of stitches

One week later, stitches were removed.

style italiano styleitaliano palatal tissue healing after crown lengthening with provisional crown

The patient didn’t have the chance to come back for a couple of months. Here we can find the healing of the palatal tissues (where the fracture was) 10 weeks after the procedure. The patient was happy, and the tooth safe, because we could rely on a strong temporary crown, waiting for the final zirconia crown.


Emergency appointments are always unexpected, that’s clear. Having tools, materials and techniques to face them, is a great advantage. In case of extensive fractures of endodontically treated teeth, a complete crown preparation might be necessary, so it’s good to have the chance to rely on a simple and effective system for post and core restoration, and for an immediate, strong and resistant temporary crown.


1. Goracci C, Ferrari M. Current perspectives on post systems: a literature review. Aust Dent J. 2011 Jun;56 Suppl 1:77-83.
2. Monticelli F, Ferrari M, Toledano M. Cement system and surface treatment selection for fiber post luting. Patol Oral Cir Bucal. 2008 Mar 1;13(3):E214-21.
3. Grandini S, Chieffi N, Crysanti Cagidiaco M, Goracci C, Ferrari M. Fatigue resistance and structural integrity of different types of fiber posts. Dent Mater J. 2008 Sep;27(5):687-94.
4. Juloski J, Fadda GM, Monticelli F, Fajó-Pascual M, Goracci C, Ferrari M. Fouryear Survival of Endodontically Treated Premolars Restored with Fiber Posts. Randomized controlled trial. J Dent Res. 2014 Jul;93(7 Suppl):52S-58S.
5. Juloski J, Apicella D, Ferrari M. The effect of ferrule height on stress distribution within a tooth restored with fibre posts and ceramic crown: a finite element analysis. Dent Mater. 2014 Dec;30(12):1304-15.

style italiano styleitaliano Essential Dentistry kit online on demand course
style italiano styleitaliano Essential Dentistry kit online on demand course


style italiano styleitaliano luxabond universal dual core adhesive

A Dynamic Duo: Using LuxaBond Universal and LuxaCore Z Dual to restore a fractured premolar

In this article, we discuss how the combined use of LuxaBond Universal, LuxaPost, and LuxaCore Z Dual helped save a fractured endodontically treated UR5.