A pulpectomy is the complete removal of all vital and necrotic pulp tissue from both the pulp chamber and root canals of a tooth, followed by thorough debridement and obturation of the canal space. It is indicated when pulp inflammation or infection is irreversible and cannot be managed by more conservative approaches such as a pulpotomy, which removes only the coronal portion of the pulp.

When a Pulpectomy Is Indicated

Clinicians determine the need for a pulpectomy through clinical findings and radiographic evaluation. The procedure is appropriate when the pulp is beyond recovery or already necrotic. Common indications include:

• Irreversible pulpitis with spontaneous, lingering pain
• Pulp necrosis with or without periapical pathology
• Deep carious lesions resulting in pulp exposure and signs of bacterial invasion
• Symptomatic apical periodontitis or the presence of a draining sinus tract
• Traumatic injuries that have led to pulp death

How the Procedure Works

The procedure begins with local anesthesia and rubber dam isolation to maintain a sterile field. An access opening is created through the crown to expose the pulp chamber. Using endodontic files and irrigating solutions such as sodium hypochlorite, the clinician removes all pulp tissue, shapes the canal walls, and disinfects the space. The canals are then obturated — sealed to prevent recontamination. In permanent teeth, gutta-percha is the standard obturating material; in primary teeth, a resorbable paste is used so that the material degrades naturally as the root resorbs ahead of the erupting successor.

Pulpectomy in Primary vs. Permanent Teeth

In permanent dentition, a pulpectomy is the foundational step of conventional root canal therapy. In primary (deciduous) teeth, the technique is modified to account for divergent, resorbing root anatomy and the biological need for a material compatible with normal exfoliation. Preserving a primary tooth through pulpectomy maintains arch integrity and guides the proper eruption of the permanent tooth beneath it.

Once the pulpectomy is complete, the treated tooth typically requires a full-coverage restoration — a stainless steel crown in primary teeth or a ceramic crown in permanent teeth — to protect the remaining dentin and restore occlusal function. Early diagnosis and prompt treatment significantly improve the long-term prognosis and reduce the risk of spreading periapical infection to adjacent structures.