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Valve Jobs Done Right. A close-up of a Honda CB750 SOHC valve seat. Though the upper 30 degree and the lower 60 degree shapes have been rough cut using Neway cutters, the 45 degree cut in the middle, the one that counts because it is the actual sealing surface, has the benefit of a stoned surface, the best possible with hand tools. Ah, valve jobs.
The ideal reduction is an anatomical or slight valgus position. of the femoral head on the AP view with a trabecular angle of. 160Â° to 170Â°. A varus position must be avoided. On the lateral. radiograph, the femoral head, neck, trochanteric region and. shaft should be in a straight line. The optimum Garden align-. ment reduction angles for the AP and lateral radiographs are. between 160Â° and 180Â°.15. Many different implants are available for the internal fixation. of intracapsular fractures.