The ischemic infarct pulp of traumatized teeth: A light and electron microscopic study

Abstract

Extirpated pulps from 42 traumatized, asymptomatic teeth with no history of periapical pathosis, pulp exposure, or responsiveness to pulp tests were examined by light microscopic techniques. Only 5 pulps demonstrated infarcts; these were further evaluated with the transmission electron microscope. Eight microscopically, as compared lo the normal controls, the pulp tissue of the so‐called ischemic infarct was markedly altered. Some areas showed inflammation and altered nuclei, but with no discernible neural elements, and with less collagen. The electron microscopic samples showed evidence of necrosis, pal‐terns of nuclear degradation, relative avascularity, degenerating neural elements, and disorganized collagen. It was concluded that the ischemic in fan; l phenomenon in the traumatized pulp docs occur occasionally, but presents a variety of structural alterations indicating degeneration.

Microbiological and microscopic analysis of the pulp of non-vital traumatized teeth with intact crowns

“…These results disagree with the findings of Arwill, et al 9 , who investigated a sample of 25 pulps removed from teeth with clinical diagnosis of pulp necrosis after trauma and observed that only 56% were really necrotic on microscopic examination. Cipriano and Walton 12 , in turn, did not confirm microscopically the clinical diagnosis of pulp necrosis after trauma in 88% of analyzed teeth. Also, Andreasen 2 conducted microscopic evaluation of a sample of 66 teeth with clinical diagnosis of pulp necrosis and observed that 9 to 14% of removed pulps still presented possibility of repair and should not have been removed.…”

Pulpal response to sensibility tests after traumatic dental injuries in permanent teeth

“…Traumatic dental injuries may damage hard dental tissues and pulpal and periodontal structures, compromising function and aesthetics and cause emotional problems, especially among children and adolescents . Immediately after an acute dental trauma, healing events begin in an attempt to regenerate nerves and vessels and to replace damaged pulpal tissue . Within this period, there is also an urgent need to define the pulpal condition in order to restore the aesthetics and function of the affected teeth.…”

Avaliação Clínica e Radiográfica de Dentes Decíduos Intruídos por Traumatismo Alvéolo-Dentário

“…Resulta no deslocamento do dente no sentido axial para o interior do osso alveolar, podendo causar injúrias à estrutura periodontal e ao tecido pulpar através do esmagamento e ruptura das fibras do ligamento periodontal e do aporte vascular. Também é possível que exista a fratura da tábua óssea 9 . Para estabelecer a conduta clínica frente a uma intrusão dentária deve-se, principalmente, considerar a direção do deslocamento.…”