This clinical case presents a 26-year-old male who, after several episodes of pericoronitis, underwent surgical extraction of the lower right third molar. The socket was filled with autologous dentin from the freshly extracted lower third molar. This material was prepared using the Tooth Transformer® device (Imbiodent, Zaragoza, Spain). The objective was to enhance bone regeneration in the socket and prevent the development of a periodontal pocket distal to the second molar. This technique may also be used for alveolar preservation and bone regeneration in implant dentistry.