RESUMEN
Treatment and management of teeth with furcation involvement is one of the most challenging problems confronting dentist. The aim of this case report was to evaluate the result of a mesio-distal tunnel preparation on a maxillary second molar. This treatment was done for a 52 year old white man in a good general health. After raising a full thickness flap on the upper left sextant of mouth, the furcation of tooth # 15 was widened by a # 2 round bur and bone file. Osteoplasty continued by bur, file, and chisel until enough space was created for interdental brush use to control dental plaque. Prosthodontic treatment was done 4 months after the periodontal therapy. After 3 years, the treated tooth is still functioning in the mouth of patient. We are satisfied with the result of treatment. This heroic technique could not be considered as a regular treatment modality for any tooth or any patient. Some requirements are considered necessary for this kind of preparation