A thigh strain or quadriceps strain is a tear in one of the quadriceps muscles at the front of the thigh. It can range from a mild discomfort to a full blown tear of most of the muscle resulting in severe pain and inability to walk.
The breakage of the stitches starts within 2 weeks of the stitching but if you want the complete stitches to disappear then the process of hydrolysis or the enzymes in our body do that in a period of 60 days and therefore it approximately takes up to 2 months for the stitches to get dissolved.
If you received stitches during your surgical extraction, the stitches will dissolve on their own in about two weeks. You can rinse with warm salt water to help them dissolve. If they do not go away on their own, they may need to be removed by a surgeon or dentist.