I have seen both types of damage in captive snakes - 'Bent' scales and the wound-type.
I imagine they occur differently.
moisture and humidity in the enclosure can adversely affect scales. If it's too wet, some scale rot can occur and when it heals it looks much like the wound-type damage.
If there's a lack of moisture, or if the snake does not soak itself properly, the resulting shed can end in some of the 'bent' scales look.
Look for proper husbandry - occasional misting, esp. when the snake is nearing a shed, clean water in a bowl large enough for the animal to soak, quick cage cleaning if it gets too wet, etc.
The damage can also be self-inflicted by pushing against sharp edges, or the screen mesh of the cage-top, bite wounds, etc.
JMO,
Jack
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...and I think to myself, "What a wonderful world."