Depth can be accepted in areas the patient is able to remove plaque. Bone should be reshaped with the idea of enhancing oral hygiene. Principles of positive architecture include ostectomy on the palatal and buccal sides and on the line angles. Sometimes a split flap can preserve bone on the buccal side and osteoplasty can be done in some areas through the periosteum. Contouring following root amputations should be done visualizing what is desired after healing.
Oral hygiene seems to be the key for long term success.
Patients unable to control plaque should not be candidates for surgery. Osseous correction of craters is often necessary even to eliminate residual defects after grafting. Removal of widow-peaks are important after ramping the crater. Osseous surgery should be done with minimal detailing in order to eliminate pocket. Thick bone and ledges should be removed because they interfere with harmonious gingival contours and are not providing any support for the teeth.