Transplantations of teeth are long known techniques used in human dentistry, which have been mastered within the last few decades. Several parameters of successful transplantation can be evaluated directly in the human; however, there is still an important role for research in animal models, enabling changes at molecular and cellular levels to be uncovered. Additionally, animals help with the optimization of allotransplantations and cryopreservation procedures. This paper is focused on microscopical evaluations of transplanted teeth, particularly cellular processes and molecular markers related to soft tissue regeneration and hard tissue formation in the mouse, with the aim of summarizing and supplementating the latest knowledge and recent research.