Does ferrule thickness influence resistance to fracture of endodontically treated teeth?

Conclusion: Ferrule thickness can influence the resistance to fracture of ETT.

Is fracture resistance of endodontically treated teeth?

Some studies indicated that endodontically treated teeth restored with fiber-reinforced posts exhibited lower fracture resistance compared to teeth restored with other posts, such as those composed of metal.

How much ferrule is needed?

8 So, it is recommended that a ferrule of 2.0 mm is adequate to resist the forces under load that may lead to failure of the restoration/tooth. A study confirmed that a ferrule increases the mechanical resistance of the restoration.

Why there is more risk of fracture in endodontically treated tooth?

However, endodontically treated teeth (ETT) exhibit greater brittleness and are more prone to fracture than non-ETT. It has been claimed that the inherent problems are mainly due to the drying of ETT over time and due to changes in their collagen cross-linking (1, 2).

What is Endodontically treated teeth?

A tooth that requires endodontic treatment is commonly a tooth that has lost a large volume of tooth tissue and is heavily restored. These teeth are often more prone to fracture.

What is ferrule dentistry?

A ferrule[1,2] has been defined as ‘a 360 degree metal collar of the crown surrounding the parallel walls of the dentine extending coronal to the shoulder of the preparation’;[3] ‘a subgingival collar or apron of gold which extends as far as possible beyond the gingival seat of the core and completely surrounds the …

What does Endodontically mean?

Endodontics is the branch of dentistry concerning dental pulp and tissues surrounding the roots of a tooth. “Endo” is the Greek word for “inside” and “odont” is Greek for “tooth.” Endodontic treatment, or root canal treatment, treats the soft pulp tissue inside the tooth.

Why ferrule is required?

This is imperative to prevent the complication of tooth/root fracture. Even if a dowel core is placed in the tooth, the root will remain susceptible to fracture without the crown encircling the tooth apical to the core. This ferrule effect around the tooth protects it from fracture by the dowel from within.”

What is the purpose of ferrule in dentistry?

What is the Role or Use of Dental Ferrule? It is a must in post Endodontic reconstruction of severely degraded teeth to give an embracement of the hard tissue by crown restoration of a certain height. The Ferrule comprises of a shoulder preparation with parallel coronal dentin walls.

How does the crown margin affect fracture resistance?

One millimeter of coronal tooth structure above the crown margin substantially increased the fracture resistance of endodontically treated teeth, whereas a contrabevel at either the tooth-core junction or the crown margin was ineffective. The thickness of axial tooth structure at the crown margin did not appreciably improve resistance to fracture.

What kind of cement is used to treat ferrule?

The canals were irrigated with water and dried with an air syringe and paper points. Zinc phosphate cement (Flecks, Mizzy, Inc., Clifton Forge, Va.) was mixed and in- troduced into the canal with a Lentulo spiral drill (Pulp- dent Corp., of America, Brookline Village, Mass.) until the canal appeared full.

When to use a dowel for endodontically treated teeth?

JLn vitro and in vivo research has demonstrated that a dowel does not reinforce endodontically treated teeth.1″4 However, when there is sparse clinical crown remaining, a means of replacing lost coronal tooth structure for crown retention is necessary.

How many maxillary incisors are stored at the tooth restoration interface?

THE JOURNAL OF PROSTHETIC DENTISTRY 529 SORENSEN AND ENGELMAN Fig. 1. Illustration of ferrule effect at tooth-restoration interface. MATERIAL AND METHODS Sixty intact maxillary central incisors were randomly assigned to six groups of 10 teeth and stored in saline so- lution during all procedures.