Strength of wound after 2 months is governed by-
Collagen cross linking
Excess collagen deposition
Both 'a' and 'b'
None of the above
Ans. is 'a' i.e., Collagen cross linking Wound strengtho At the end of first week, wound strength is approximately 10% that of normal skin,o Strength increases rapidly over the next 4 weeks.o At the end of third months, the strength reaches a plateau of about 70 to 80% of the normal skin, a condition that may persist for life.So, (Remember following facts)o Tensile strength never reaches the normal strength of unwounded tissue (i.e., 100%).o Maximum strength is achieved by the end of 3 months.o Maximum strength is 70-80% of normal tissue.How does tensile strength change with time ?o During first 2 months it is due to excess collagen deposition.o After that it is due to structural modification of collagen, i.e., cross-linking, increased fiber size.