A 25-year-old man complains of a dull pain in the area of his lower right second molar. This tooth was treated for pulpitis one day ago. The carious cavity has a temporary filling. Objectively, X ray of tooth 47 shows a perforation in the area of root bifurcation within the bone tissue. The root canals are filled and there are no pathologic changes in the periapical tissues. The depth of dentogingival probing in the bifurcation area is normal. What treatment method would be optimal in this case?