RESUMEN
Objectives: this study aimed to investigate dentinal crack rate following parapulpal pin insertion in anterior primary teeth
Methods: thirteen sound freshly extracted primary canine teeth were horizontally sectioned 1 mm above the cementoenamel junction [CEJ]. All samples were thoroughly inspected to ensure that the teeth had no cracks. The teeth were then mounted in acrylic blocks, and subjected to drilling and insertion of a single parapulpal pin in the prepared hole. The teeth were then sectioned perpendicular to the already prepared surface at 1, 2 and 3 mm depths for further evaluation under a stereomicroscope [×12 and ×25 magnifications]
Results: no crack or crazing was observed in teeth in the control group while one out of 11 teeth in the case group had a crack
Conclusion: the use of 0.53 mm diameter self-threading pin did not increase the risk of crack formation in dentin of anterior primary teeth prior to composite restoration