Revascularization of a necrotic, infected, immature permanent molar with apical periodontitis: a case report

The traditional techniques of chemo-mechanical instrumentation and disinfection of the root canal system used in mature teeth are limited by the immature tooth's anatomy. The open apex is difficult or impossible to seal with conventional root filling methods because of the absence of an apical stop. Furthermore, the arrested development of the dentinal walls at the time of pulp necrosis leaves a weak tooth with thin dentinal walls that are susceptible to fracture. The purpose of the paper is to present the case of a patient wherein revascularization of the necrotic infected pulp space of an immature permanent mandibular molar was induced by stimulation of a blood clot from the periapical tissues into the canal space. The treatment approach can help rescue infected immature teeth by physiologically strengthening the root walls.