PRECISION ATTACHMENT

PRECISION ATTACHMENT

Precision attachments are two precocious metal components which are manufactured to form an articulate joint.

Indications:

Esthetics zone. 

Redistribution of forces required. 

Minimize trauma to soft tissue. 

Control of loading and rotational forces. 

Nonparallel abutments present. 

Segmenting of the long span bridges.  

As stress breaker in free end saddles and bridges. 

Intracoronal attachments as effective direct retainers for removable partial dentures. 

To retain hybrid dentures

Contraindications:

In patients who are sick and the senile.

Along one precise path of insertion, the patient must possess an average degree of manual skill. 

Patients with severe periodontitis. 

Patients with abnormally high caries rate. 

Where there is inadequate space.

Advantages:

Improved esthetics and elevated psychological acceptance of the prosthesis.

Better retention and stability, less liable to fracture than conventional clasp, less bulk, and reduced incidence of secondary caries.

Lateral forces in the abutment during the insertion and removal are eliminated, and more axial force during functions is achieved.

In case of distal extension base - broken stress philosophy that limits the potentially damaging forces.

Provide better vertical sup‑ port and better stimulation to the underlying tissue. 

Disadvantages:

Complexity of design, complex principles, and procedures for fabrication and clinical treatment. 

Expensive increased overall cost of the treatment. Increased demand on oral hygiene performance. 

The tooth may have to be extensively prepared to provide required space to accommodate intracoronal attachment. The attachment is subjected to wear as a result of friction between metal parts.