Abstract
Abstract In a material of 637 luxated permanent teeth, it was found that 26 teeth (4.2%) which initially demonstrated the classical signs of pulp necrosis had reverted to normal appearance and sensibility at later examination, indicating that a revascularization and reinnervation process of the traumatized pulpal tissue had taken place. A histological and histobacteriological analysis was made of 66 pulps in the same population that had been extirpated due to suspected pulpal necrosis after injury, in order to examine whether similar changes could also have occurred in these teeth. It was found that the pulps studied were either non‐infected (n = 27), infected (n= 11) or totally autolyzed (i.e. not enough tissue for histological examination (n = 28)). In contrast to teeth with autolyzed or infected pulp tissue, 12 of the 27 non‐infected specimens showed signs of pulpal revascularization and/or apparent scattered cell survival. These pulps were assumed to have a potential for healing (i.e. revascularization and reinnervation of the pulp). Most clinical and radiographic parameters appeared not to be associated with pulpal infection of cell/tissue integrity. Only the length of the observation period and tenderness to percussion were found to be related to the histological status (i.e. presence or absence of pulpal infection, cellular versus acellular stroma). It was concluded that the present criteria for pulpal necrosis cannot discriminate between infected pulp necrosis and cases where healing might take place. Whether healing processes would actually lead to repair of the pulp could not be determined with the present material.
Published Version
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