SUMMARYThe purpose of this study was to investigate the effects of non-steady locomotor activities on load predictability in two goat forelimb bones and to explore the degree to which bone curvature influences load predictability. We measured in vivo bone strains in the radius and metacarpus of juvenile goats performing a variety of natural behaviors in an outdoor arena and compared these strain magnitudes and loading patterns with those measured during steady-state treadmill locomotion. We sought to test two hypotheses: our first hypothesis expects an increase in the variability of strain magnitude and pattern during outdoor non-steady behavior when compared to treadmill locomotion. Our second hypothesis was that the curved radius experiences higher peak strains but less variability during non-steady activities than the straighter metacarpus. We found that unsteady, outdoor locomotion generally caused more variable strain patterns (consistent with the first hypothesis), but not more variable strain magnitudes, than treadmill locomotion in both bones. During outdoor locomotion, higher magnitude strain events in the radius showed more constrained loading patterns than in the metacarpus (consistent with the second hypothesis). In addition to the radius experiencing significantly greater bending strains compared to the straighter metacarpus, these results support the idea of a trade-off between increased predictability of loading pattern and increased bending-induced strain. Strain magnitudes recorded during both outdoor and treadmill locomotion showed a lognormal frequency distribution, but the outdoor bone strain distributions had a greater range because they included high magnitude loading events that did not occur during steady treadmill locomotion.

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The authors believe the cross dermal flaps technique is safe and applicable to an extensive variety of cases. It is easy to execute and to teach, and therefore, those who are beginning to use inverted T techniques such as that described, can, from the beginning, diminish the incidence of short- and long-term complications such as dehiscence that lead to scarring at the convergence of the flaps and bottoming out of the inferior pole, with the horizontal scar displaced upward and an increase in the distance between the later and the nipple areola complex.

In our experience with this technique, we obtained satisfactory position and shape; good quality, well-placed scars; long-lasting results; and preservation of the patient's ability to breast feed. The technique is simple to perform and is indicated in cases of moderate ptosis.

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