[Studies on wound healing and secondary and tertiary wounds]

From animal experiments, the authors draw the following conclusions: 1. Compared with primary wounds, the tensile strength of secondary and tertiary wounds is significantly elevated. 2. Aside from a slight elevation on the third day, there is no difference of tensile strength between secondary and tertiary wounds. 3. Collagenous fibers are earlier formed in secondary and tertiary wounds because the initial phase of fibrillogenesis is shortened due to more developed granular tissue with increased vascularization as compared with primary wounds. Whether local factors influence the accelerated healing and the tensile strength of the wounds requires further investigation.