Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . or parasitic in their of these disturbances produce local manifestations. Theprimary causes, as their name implies, attack the pulp directly,such as an infection from a carious defect; while the secondary4 50 DISEASES OF THE hi:\ TAL IT LI causes -elect ;m indirect route. as those arising from a pericementitisor an osteitis. The vast majority of the causes which are responsible for patho-logic disturbances of the dental pulp find their origin in a direct orindirect associat
Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . or parasitic in their of these disturbances produce local manifestations. Theprimary causes, as their name implies, attack the pulp directly,such as an infection from a carious defect; while the secondary4 50 DISEASES OF THE hi:\ TAL IT LI causes -elect ;m indirect route. as those arising from a pericementitisor an osteitis. The vast majority of the causes which are responsible for patho-logic disturbances of the dental pulp find their origin in a direct orindirect association with the infective processes of the hard struct-ures of the tooth, i. dental caries as a sequence of a streptomj cosisof a mixed type. The very same organisms which are closely asso-ciated with the carious process are always predominant in aninfected dental pulp. To facilitate the ready classification of the etiologic factor- ofthe disease of the dental pulp from a clinical point of view, theschematic outline on p. 49, as suggested by the late \Y. I). Miller,will he found to he of service. I Typical Bporl accidenl icture f upper firsl iii<i-i-. Mayrhofer.) Causes of a Mechanical Nature. Traumatic disturbances of the pulp are manifold in their character and are commonly met with in clinical practice. Such accidents as a fall, a blow, or being hitby some solid object, are of frequent occurrence. Children and those adults who indulge in the various types of sports are prone to he injured about the teeth. On account of their prominence, the upper anterior incisors suffer more often than the other accidents, Mich as ;i fall in skating, Usually cause t\ pica! fractures of the upper central-. Accidents, such as the breakingof a tooth during extraction, are also frequent occurrence-. Duringthe excavation of a carious defect the pulp is often accidentallyexposed. A Fracture of the tooth crown ma\ directly expose the pulp, i- it nia\ OCCUr in SUch close
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