File:General surgery and pathology for dentists (1895) (14592297338).jpg

Identifier: generalsurgerypa00roug (find matches)
Title: General surgery and pathology for dentists
Year: 1895 (1890s)
Authors: Roughton, Edmund W
Subjects:
Publisher: Philadelphia : S. S. White Dental Mfg. Co.
Contributing Library: Dentistry - University of Toronto
Digitizing Sponsor: University of Toronto

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sults of osteitis will begiven with the description of caries, suppuration of bone,and necrosis (which see). Caeies. Caries of bone is essentially the same process as ulcerationof soft parts. It is one of the terminations or results ofosteitis, and is prone to occur when the osteitis depends onstruma, tuberculosis or syphilis, or occurs in a person whois in a low state of general health from any other cause. Itis more common in cancellous than in compact bone,affecting especially the bodies of the vertebraa, the carpusand tarsus and the ends of the long bones. PATHOLOGY AND SURGERY. 117 The nature of the process will be best understood byreferring to Fig. 21. The thick black lines to the left ot thediagram represent normal bone trabeculae, and between themare the spaces or cancelli which are occupied by marrow(the marrow is not represented in the diagram). Passing tothe right, the spaces are seen to grow larger and to containinflammatory exudation, whilst the trabeculae become thinner
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Fig. 22. SYPHILITIC CARIES AND NECROSIS OF SKULL. (Museum of St. Marys Hospital.) from absorption (rarefying osteitis). To the right of thediagram the trabeculae have completely disappeared, andthere is nothing but granulation tissue (caries). Underfavourable conditions the granulation tissue may ossify, andsclerosis result. In the great majority of cases, however,the inflammatory material undergoes caseous degenerationor forms pus, which may find its way either to the surface 118 PATHOLOGY AND SURGERY. of the body or into a neighbouring joint. Sometimes cariescontinues for a long time without either leading to ossifica-tion or to suppuration, this condition is called caries sicca.Sometimes a small piece of cancellous tissue dies en masse^instead of molecule by molecule ; when caries and necrosisare thus associated the condition is called caries necrrotica^(see Fig. 22). In caries tbe result of tuberculosis the inflam-matory exudation is especially prone to caseate, the bone issoft, g

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