Dental traumatology: endodontic management of luxations and crown fractures

The immediate treatment protocols recommended by the International Association of Dental Traumatology for the different categories of dental trauma, and why treatment timing affects pulp survival more than any other factor.

Acute dental trauma — prevalent in children and adolescents, but far from rare in adults due to sports or road accidents — requires rapid diagnostic classification according to Andreasen's classification, which distinguishes crown fractures (without pulp exposure, with pulp exposure, complicated by root fracture) from luxations (concussion, subluxation, lateral luxation, intrusive, extrusive) and complete avulsion. Each of these categories has a specific immediate management protocol, codified in the guidelines of the International Association of Dental Traumatology (IADT), periodically updated based on available clinical evidence.

In crown fractures with pulp exposure, the determining prognostic factor for pulp survival is the time elapsed between the trauma and treatment: an exposure treated within a few hours with partial pulpotomy (removal of a thin layer of contaminated superficial pulp tissue, followed by dressing with bioceramic material) in a tooth with an apex still forming has significantly better prospects for preserving pulp vitality compared to an exposure treated days later, when bacterial contamination has already reached the deeper pulp.

Luxations present a specific risk of post-traumatic root resorption — inflammatory, replacement (ankylosis), or invasive cervical — whose incidence and severity correlate directly with the extent of damage to the periodontal ligament and root surface at the time of trauma. Intrusive luxations, in which the tooth is driven into the alveolar bone, carry the highest risk of pulp necrosis (almost constant in teeth with a completed apex) and progressive root resorption, requiring close clinical and radiographic follow-up in the months following the trauma even in the absence of immediate symptoms.

Complete avulsion (the tooth entirely expelled from the socket) is the only true dental emergency in which the tooth's extra-oral time dramatically affects the prognosis: immediate replantation at the accident site, or within a few minutes while keeping the tooth in a suitable medium (saline solution, milk, the patient's own saliva — never tap water, which is hypotonic and lyses the periodontal ligament cells remaining on the root surface), is the only factor truly capable of preserving the viability of periodontal ligament cells and therefore the long-term prognosis of the replanted tooth.

On Oralzon you'll find flexible splinting for post-traumatic stabilization of luxated or replanted teeth, along with bioceramic materials for the conservative management of pulp exposures from trauma.