Is a porcelain onlay better than a metal filling?

Porcelain onlays are more aesthetic and can be more durable, but the choice depends on the specific clinical situation and patient preference.

How long does a porcelain onlay last?

With proper care, a porcelain onlay can last 10-15 years or more, depending on factors like oral hygiene and bite force.

Can an onlay be used on any tooth?

Onlays are typically used on molars and premolars, but suitability depends on the tooth's condition and location.

What should a patient expect during the onlay procedure?

The procedure involves removing decay, taking an impression, and placing a temporary onlay, followed by fitting the permanent onlay at a subsequent appointment.

D2642

Onlay Porcelain/Ceramic Two Surfaces - CDT Code Guide

Restorative/Inlay/Onlay Restorations

Overview

CDT Code D2642 refers to the placement of an onlay made from porcelain or ceramic material, covering two surfaces of a tooth. This procedure is typically used when a tooth has been damaged or decayed to the extent that a filling is insufficient, but the tooth structure is still strong enough to avoid a full crown. The onlay helps restore the tooth's function and appearance, providing a durable and aesthetically pleasing solution. Clinically, this code is applicable in cases where the tooth's cusps are intact, but the restoration requires coverage of two surfaces to ensure structural integrity and longevity.

When to Use This Code

When a tooth has moderate decay affecting two surfaces but does not require a full crown.
In cases where a previous filling has failed, and an onlay is a more durable option.
When a patient desires a more aesthetic restoration than a metal filling.
To restore a fractured tooth with intact cusps.
For patients with a history of bruxism, where a durable restoration is needed.

Documentation Requirements

Detailed clinical notes describing the extent of decay or damage.
Pre-operative radiographs showing the affected tooth surfaces.
Photographic evidence of the tooth before and after the procedure.
Documentation of patient consent for the onlay procedure.
A description of the materials used in the onlay fabrication.
Post-operative instructions provided to the patient.

Billing Considerations

When billing for D2642, ensure that the procedure is not performed more frequently than necessary, as insurance may have frequency limitations. Common modifiers may include those indicating the quadrant or arch. Verify with the patient's insurance for coverage specifics, as some plans may have restrictions on porcelain or ceramic materials.

Related CDT Codes

D2392 D2740 D2750 D2950 D2962

Frequently Asked Questions

An onlay covers one or more surfaces of a tooth, preserving more of the natural structure, while a crown covers the entire tooth.

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