Cast bridges are made of various alloys by casting.

Solid castings are cast as a single unit. This eliminates soldering, heterogeneity of metals, as well as manufacturing errors.

Most often, gold, silver - palladium or cobalt - chrome alloys are used for the manufacture of the structure.

Depending on the client’s desire, a prosthesis made of cobalt-chrome alloy can be:

• In pure form.
• Gold plated.
• Lined with ceramic or plastic on the front surface or on all sides.

Benefits

All-metal bridge has advantages:

• Restoring the dentition while maintaining function.
• Due to the tight fit on the abutment teeth, saliva, microorganisms and food debris under the construction are completely excluded.
• The durability of the prosthesis due to its high strength and resistance to wear.
• High structural strength due to the absence of solder.
• In the manufacture of the prosthesis, simultaneous accurate modeling of the intermediate part and the supporting crowns is performed, which increases its functional efficiency.
• When grinding the tooth under the crown, most of the tooth tissue is retained.
• Affordable price.

disadvantages

• Low aesthetics of the structure, in connection with which fixed cast prostheses are used for prosthetics of teeth that do not fall into the smile zone.
• High thermal conductivity of the metal. The appearance of discomfort while eating hot food.
• The need for the preparation of supporting teeth.
• If the bridge is improperly designed, periodontal overload is possible.
• Cost is higher than removable designs.
• Over time, loosening and damage to supporting teeth from increased load are not excluded.
• Difficulty in hygienic oral care.

Contraindications

Contraindications to the installation of a bridge can be absolute and relative.

It is not possible to install the structure in the following cases:

• In the absence of more than one molar, two premolars and four incisors in a row.
• With osteomyelitis or osteoporosis of the jawbone.
• If there is a bleeding disorder.
• With intolerance to the drugs used for anesthesia.
• The presence of cancer.
• Mental disorders.

Relative contraindications to the installation of the bridge are:

• Involuntary grinding of teeth (bruxism).
• Malocclusion.
• Periodontal disease (periodontal disease and periodontitis severe).
• Increased tooth abrasion.
• Acute inflammatory diseases of the oral cavity.
• Poor oral hygiene.

Indications

The installation of a cast prosthesis is indicated in the following cases:

• Defects in individual teeth and dentition.
• Tooth injury.
• Caries.
• Replacing previously manufactured bridge structures.

Making a one-piece bridge

Stages fabrication designs include:

• Inspection and diagnosis of the condition of individual teeth and dentitions. After the examination, if necessary, treatment of abutment teeth, root canal filling is performed.
• Periodontal assessment. In the presence of pathological processes, gum treatment is performed.
• Preparation of supporting teeth. Their grinding is carried out and, if necessary, depulpation.
• Impression of the upper and lower jaws and sending them to the laboratory.
• In the laboratory, models of jaws are made on which the frame of the future structure is formed.
• Casting a metal frame.
• Color matching of facing ceramics.
• Fitting and fitting the bridge structure. Checks the closure of teeth with teeth of the opposite jaw, the aesthetics of the design. If necessary, a correction is made.
• Fixing a bridge with cement.

Video: “A bridge. Cermets »