From biopsy to microscope: tissue processing in Dentistry
DOI:
https://doi.org/10.5335/rfo.v29i1.15611Keywords:
Hematoxilina, Histologia, Microtomia, Fixação de TecidosAbstract
Aim: The aim of this literature review is to describe the fundamental steps of tissue processing for optical microscopy with hematoxylin and eosin (HE) staining of interest in dentistry. Literature Review: Tissue processing for HE staining basically consists of 7 sequential steps. Immediately after the biopsy, the specimen is fixed in formaldehyde to stop tissue autolysis. Then, in the cleavage stage, it undergoes size reduction to facilitate the penetration of the fixing agent. If the sample is a tooth or bone tissue, it goes through a decalcification process prior to cleavage. In the processing and inclusion stages, liquids are removed from the interior of the cells so that paraffin enters in its place, and the tissue is included in a mold to form a rigid block of paraffin, which will be cut in the microtomy phase. Thin tissue sections are then adhered to a slide, colored and sealed. Conclusion: An excellent result in obtaining histological slides depends on the correct execution of all stages of the tissue processing, and is also influenced by the dentist's care with the sample to be sent to the laboratory.
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