I will assume you are referring to the aortic valve, so I will share what I know. In Dec. of 2002 I had a valve sparing procedure done to correct an aneurysm of the ascending aorta. Part of the aorta right next to the heart was replaced, and the aortic valve actually sewed up within the dacron sleve. Other than the regurgitation cause by the aneurysm, the valve was perfectly normal. Technically the procedure is known as a "T. David - V" procedure, after Dr. Tyronne David, the surgeon that first developed it. If you go into Google and search for "valve sparing" you will see a number of articles about the procedure. You can also look up Dr. David and learn a lot.
Thus far everything is holding up fine for me. Mine was the condition which was perfectly suited for a valve sparing procedure, specifically, an ascending aortic aneurysm but an otherwise normal aortic valve. My surgeon and cardiologist both believe that future surgery is unlikely. Thus far published reports seem to indicate that this is a durable fix, with a low level of resurgery. My surgeon has told me that the level of resurgery required on his folks is very low.
Now if one has a bicuspid aortic valve, or genetic tissue problems, your mileage might vary a lot, according to what I have read.
When I was first told of my condition I was going to doctors in suburban Chicago, and basically was given two options, mechanical or tissue valve, as a valve replacement used to be the standard in the face of an ascending aortic aneurysm. However, at my wife's urging I then went to two of the major teaching hospitals and learned all about things like valve repair and the Ross Procedure. As it happened my primary care doctor had never even heard of the Ross or the possibility of valve repair.
The lesson that I took from that was that it is wise to seek out the top heart surgeon near you, one that has been performing valve repairs for a while, and let them tell you whether you are suitable for this procedure. The valve repair is a technically more difficult surgery to perform that a straight up replacement, I am told, so there are fewer doctors able to perform it. Those are likely the docs that will fail to mention it as a possibility.
So my advice to you is to look further, to find a doctor that knows the procedure and can tell you whether it might work for you.
Good luck, feel free to E mail me if you have further questions.