Can my current bonding be touched up without replacing it? (photos)

Your current dental bonding can be touched and altered if need be, but the better question is why did the space appear in the first place?Depending on your age and jaw development, teeth can move or get gaps, however if it is due to your bite, (occlusion) or parafunctional habits, you can get the gap again.Dental bonding is a great dental treatment in which the dentist can alter the dental bonding easily, remove or even add by just roughening the existing composite, air abrading it and use the right composite bonding agent to augment the existing composite bonding. So the answer is yes, you can bond to existing bonding and have touch up done. Some dentists prefer to remove the existing dental bonding all together to start fresh, which it can gain a better bond to your tooth.

The reason to replace the entire bonding is that bonding does not bond well to bonding.  There is a better cance of long term success to bond to the tooth.  But you should also have you dentist determine what is causing the space to reopen