This is a difficult question without seeing you. If you do not have the correct type of gum tissue around a certain tooth the gum tissue will continue to break down and possibly be inflamed. At your age I would be concerned about the recession. At this point I don't think the method of toothbrushing will mean anything. I think that the architecture of the gum tissue has to be corrected and then an appropriate toothbrushing method can be taught to yhou. I would hope that you are consulting a periodontist for this problem.
toothbrush abrasion happens to tooth structure, not gums, and the damage to such tooth structure will not "heal". the enamel is thin at the gumline, and there is no enamel below the gumline, so if the gums recede, softer tooth structure called dentin will be exposed and is easily worn away by the brush. you should be using only a soft bristle toothbrush-- nothing electric in my opinion. ask your hygienist to go over proper brushing technique with you. if the abrasion is bad, or if the teeth are sensitive due to the exposed, abraded dentin, then bonding can be done to "fill in " the abraded areas. you may then be a candidate for grafting where tissue (usually from the palate) is grafted to your existing gum tissue. be careful here. sometimes the materials used to bond teeth can make the teeth even more sensitie so be sure to discuss this with your dentist. The restorations also must be exqusitely done and well polished, so grafted tissue does not react unfavorably to the bonded restorations. if you have no sensitiity, and the cosmetic issue does not bother you, then I would be hesitant to do anything other than modify your brush and your technique. If the issue is one of sensitivity only, ask your dentist about dentinal sealers such as "super seal" which is very easy and inexpensive to apply, and basically clogs the tubules in the dentin leading to the nerve, so sensitivity is decreased. sometimes you need a few applications. in my opinion, abrasion defects without decay can sometimes be monitored only and do not always require treatment. If many teeth are involved, and the cost is substantial, get a 2nd opinion from another Dentist, preferably one you are referred to by a good friend. good luck