Histological examination was carried out on young piglets in order to assess the consequences of tooth resection over the days following the tooth clipping. The methods of tooth clipping with clippers, and grinding by use of a rotating grindstone were compared. Piglets were slaughtered at days 3, 6, 13, 27, and 48 after tooth resection in order to collect their teeth and prepare the teeth for histological examination. Both clipping and grinding were found to induce lesions such as pulp cavity opening, fracture, hemorrhage, infiltration or abscess, and osteodentine formation. Most of these effects occurred sooner and were a larger problem after teeth clipping than after grinding. Conclusions stated that tooth grinding was still likely to cause severe pain in piglets. Thus, it was proposed that the rationale of the practice should be reevaluated.