A practical treatise on fractures and dislocations . tion of the lower fragment on its own axis is espe-cially to be guarded against, as the deformity which it occasions is moreunseemly, and the impairment of utility more decided, than that occa-sioned by a lateral deviation. It may be well also to remind the surgeonof the convenience of extending the splint beyond the end of the lastphalanx, and moulding it to this extremity, in order that the finger maybe protected against injuries., and that when, from time to time, thesplint is removed it may be reapplied with accuracy. In all cases thespl
A practical treatise on fractures and dislocations . tion of the lower fragment on its own axis is espe-cially to be guarded against, as the deformity which it occasions is moreunseemly, and the impairment of utility more decided, than that occa-sioned by a lateral deviation. It may be well also to remind the surgeonof the convenience of extending the splint beyond the end of the lastphalanx, and moulding it to this extremity, in order that the finger maybe protected against injuries., and that when, from time to time, thesplint is removed it may be reapplied with accuracy. In all cases thesplint should be lined with cotton cloth, soft flannel, or sheet lint, andsecured in place with narrow and neatly cut cotton rollers. Bandagesof this width should never be torn, but carefullv cut with scissors. CHAPTER XXVIII. FRACTURES OF THE PELVIS, AND TRAUMATIC SEPARATIONSOF ITS SYMPHYSES. Development ,of the Os Innominatum (Fig. 184).—This bone is formedfrom eight centres, three of which are called primary, and five secondary. Fig. 184. C f e ,. Development of the os innominatum. (Gray. The three primary centres belong respectively to the ilium, ischium, andpubes, and by their extension form eventually the greater portion of the 336 FRACTURES OF THE PELVIS. innominatum. They have a common point of union in the acetabulum ;and the ischium unites with the pubes, also, by the junction of theirrami. These conjunctions occur usually between the fifteenth and twen-tieth years of life. The secondary centres do not begin to ossify untilthe age of puberty, and may, therefore, properly be considered asepiphyses. One forms the crest of the ilium ; one its anterior inferiorspinous process ; one forms the symphysis pubis ; one the tuberosity ofthe ischium ; while the fifth constitutes the centre of the bottom of theacetabulum. The epiphyses become joined to the primary bones, or thebodies of the innominata, at about the twenty-fifth year. [Fracture of the pelvic bones is usually caused
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Keywords: ., bookcentury1800, bookdecade1890, booksubjec, booksubjectfractures
