224 DISEASES OF THE HORSE'S FOOT 



is necessary in making this last incision, in order that the 

 synovial sac may not be penetrated. 



All structures showing spots of necrosis should now be 

 carefully removed, either with the knife or with the curette. 

 The knives most suitable for the last stages of this opera- 

 tion are those depicted in Fig. 45 (c, d, and c). The 

 curette, or Volkmann's spoon, we show in Fig. 106. 



a 



:X 



O _^r~ 



Fig. 107. — Resection of Terminal Portion of the Perforans. 



The horny sole and the horny frog stripped from off the 

 sensitive structures. 



a, The plantar cushion; b, b, the plantar aponeurosis, or termi- 

 nal portion of perforans; c, the navicular bone; d, interos- 

 seous ligaments of the pedal articulation; e, e, semilunar 

 crest of the os pedis; f, inferior surface of os pedis; g, g, 

 the sensitive lamime of the bars; Ii, h, bearing surface of 

 the wall; /, /, the sensitive sole; k, the sensitive frog. 



When at all diseased the glenoidal surface of the navi- 

 cular bone should be curetted, even to the extent of the 

 removal of the whole of the cartilage. A healthy, granu- 

 lating surface is thus insured. 



The above figure from Gutenacker's ' Hufkrankheiten ' 



