Weiland's Classification for Osteomyelitis

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Type I: Open, exposed bone without evidence of osseous infection but with
          evidence of soft tissue infection;
Type II: Circumferential, cortical, and endosteal infection; x-ray
          showing a diffuse inflammatory reaction, increased density, and
          spindle shaped sclerotic thickening of the cortex in addition
          to areas of bone resorption; often an involucrum surrounding a
          sequestrum;
Type III: Cortical & endosteal infection assoc w/ a segmental bone defect;