The cost of a gingivectomy varies largely depending on the extent and nature of the damage caused to the gum tissues. The average cost of a gingivectomy in 2011 is $3,000 for a full mouth. It is $250 for a tooth and $600 per quadrant, covering upper right, lower right, upper left and lower left teeth. A detailed dental examination is held to determine the actual cost of the treatment. The cost may still go high if the patient requires specific treatments where the damage is unusually extensive. Gingival disease is generally caused by poor maintenance of the teeth and certain medications. Poor nutrition may also cause gingival overgrowth in some cases.