Wound healing is a complex biological process that goes through several stages in order to heal the defect. So, different wounds have different mechanism of healing. For instance, clean wounds may heal by primary intention, whereas dirty or large wounds may heal by secondary intention.
However, the wound healing model is a model for acute healing and not for chronic healing like ulcers or diabetic wounds. Hence, the model is good and stands true for acute defects. However, if you have a chronic wound, the steps are likely to be delayed and much different due to compromised functions of the body.
The stages for wound healing provide a model for acute wound healing and not necessarily chronic. The stages of wound healing are not necessarily linear The least amount of scar after healing would be in the primary intention wound
