A female patient is 51-year-old, with immobile teeth. The marginal periodontium in the area of the 14th-11th, 21st-23rd teeth has inflammation symptoms; gingival and periodontal pockets are 4-5 mm deep. Whole piece metal and plastic denture construction is to be made for the patient. What are the specifics of the construction edge placement relative to the marginal periodontium in this case?