Chin Implant Possible Without Getting Rid of Chin Dimple?

The central dimple is created because of the soft tissue of the chin pad, and not because of the underlying bone. The fibrofatty tissue that creates the central chin pad is more fibrous and condensed in the midline, which creates the central depression or dimple.
Placing a chin implant in the plane deep to this tissue is the norm, described as the sub periosteal pocket. So logically, you can see that it should not have a major influence on the depth of the dimple. I will add, however, that extra volume in this deep plane will make is subtly less evident, similar to blowing up a partially inflated balloon and noticing the outer skin of the balloon is more smooth. This should be a very small change.
The shape of the implant can be selected (and later shaped depending on the type of implant) to maintain the dimple, or the more square contour of the masculine jaw. My preference is for an external approach from an incision hidden under the chin, and a silastic implant.

It's difficult to say without the benefit of a formal evaluation. This is my expertise and a huge portion of my practice. Asymmetry is normal and expected. See an expert who does facial shaping with surgical and non surgical methods to get a comprehensive option. Best, Dr. Emer.

A chin implant should not affect your dimple – if you don't want it to. The dimple is caused by an indentation in the fibrous tissue of the chin. The implant is placed underneath this area and thus may smooth out the dimple slightly. If you tell your facial plastic surgeon that you want to keep the dimple, he or she can add a stitch, if necessary, to maintain the cleft. I hope this helps.

In most instances this the dimple is created by the attachments of the skin to the underlying muscle/bone. These commonly originate from the outer covering of the bone called the periosteum. Most implants are placed under the periosteum. Depending on the technique used for chin enlargement, you have specified an implant, these attachments may be disrupted. The can either be recreated or the implant can be shaped to minimize the effect on the dimple.. Most implants are placed under the outer covering of the bone (periosteum).

Chin implant without affecting the cleft can certainly be done especially if you ask your surgeon about placing an anatomical chin implant that sits directly on the bone. While there may be some initial swelling it should not alter your naturally occurring cleft especially if they use an external approach below the chin rather than going through the mouth. If you get too large of an implant it can also distort the cleft. In any case, I would make sure that you discuss your concerns with your surgeon. I hope this information helps.