. Periodontal disease and its treatment by ionic medication . aulty occlusionand undue stress are of importance. The common practiceof extracting premolars or first molars to relieve over-crowding of the arch in the young, almost invariably leadsto disturbing the balance in certain areas of the denture, aswell as the creation of abnormal spaces, which results in timein periodontal disease. The loss of teeth from caries, usuallythe molars in either maxilla or mandible, especially whenthis is unilateral, and their place is not supplied with artifi- 58 EARLY DIAGNOSIS OF PERIODONTAL DISEASES cial
. Periodontal disease and its treatment by ionic medication . aulty occlusionand undue stress are of importance. The common practiceof extracting premolars or first molars to relieve over-crowding of the arch in the young, almost invariably leadsto disturbing the balance in certain areas of the denture, aswell as the creation of abnormal spaces, which results in timein periodontal disease. The loss of teeth from caries, usuallythe molars in either maxilla or mandible, especially whenthis is unilateral, and their place is not supplied with artifi- 58 EARLY DIAGNOSIS OF PERIODONTAL DISEASES cial substitutes, is a fruitful means of producing undue stresson other parts of the denture and supplying an irritant tothe osseous frame and fibrous attachments of the teeth, bywhich periodontal disease can be maintained. The palatal and lingual surfaces of the gingivus are fre-quently the sites of infection, when artificial substitutes forteeth impinge on these parts; most frequently is this notice-able in the mandible when the molars are lost and a plate is. Fig. 12.—Badly constructed shell crowns. made to rest on the lingual surfaces of the incisors, absorp-tion of the alveolus at the back allows the plate to settle downsnugly on the front portion and provides a constant irritantacting injuriously on the gingivus and underlying bone. Noform of treatment will succeed while this exists. The faultily constructed shell crowns or banded crowns,where a space exists between the free edge of the metal andthe root is an undoubted source of infection, which requirescareful investigation, not that every crown of this description EARLY DIAGNOSIS OF PERIODONTAL DISEASES 59 is necessarily a cause of infection, far from it, hut it shouldhe determined whether the free edge of metal is so welladapted to the circumference of root as to preclude anyirritating influence on the gingival fold, either directly bypressure, or indirectly by retaining foreign matter in thespace. Should congestion abo
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