29 yr female. Best option for weak jaw/recessive chin? (Photo)

You are not AT ALL a case for liposuction at the neck, absolutely not. All the patients with weak chins have
flaccid submental "hammock" due to the short distance of attachment of
the floor-of-the-mouth musculature; this flaccid submental area is
authomatically corrected after the OSSEOUS genioplasty, NEVER with chin
implants.
I perform regularly all kinds of genioplasties, not only sliding
genioplasties but also one, two and three-dimensional augmentation
and/or reduction genioplasties, plus other custom designs; in other
words, I know well what I am talking about.
You are a case for a sliding genioplasty to increase onlychin projection, or alternatively performing a two-dimensional augmentation genioplasty to increase vertically as well as anteriorly (to be discussed) your chin dimensions.
This is an awesome, lifetime lasting, stable and safe procedure, which
notwithstanding needs very accurate preoperative antropometric
planning, desing, discussion and a brilliant execution, a technique full
of creativity and good aesthetic judgement requirements.
Chin implants have many disadvantages:
-visibility, static or with facial gestures / smiliing
-artificialness, fake look, evidence of implant presence

-limited lack of versatility, they do not provice vertical modifications neither reductions
-common infections
-common dislocations
-possible nerve irritation and pain
-short lifetime
So sooner than later they are normally removed, or exchanged by an osseous genioplasty.
Why
so popular (chin implants) then? Simple answer: they are technically
accessible to all surgeons, little training is required, can be done
under local and sometimes office based procedures, they are cheap.
Osseous
geniplasties are more expensive and need good skills, true, but when
performed they produce lifetime results, safe, stable overtime, very low
rate of complications, versatile three-dimensional modifications
(augmentation or reduction, vertical, horizontal and depth), low rate of
reinterventions, etc.
Feel free to request any additional information from me.

From your photos, it appears your profile would be improved with neck liposuction and chin implant.  Both procedures can be performed at the same time, and a very complementary to each other.  Liposuction will help to slim the neck silhouette, while an extended anatomic chin implant will help to provide better chin projection.  These procedures can typically be performed under local anesthesia with mild oral relaxing medication.  I suggest an in person consultation with a surgeon specializing in facial cosmetic surgery.  Good Luck!

Based on your photos, it does appear that you would be a good candidate for chin augmentation with an implant.  It also appears that liposuction under your chin (in the upper neck) would help to balance your profile.  Both of these procedures would most likely give you the best result.  

You have both nonsurgical and surgical options:
If you want to see how added chin projection can help your profile a good nonsurgical alternative is Voluma, a dermal filler used to build up bony prominences like the cheeks but can also be used to excellent effect in the chin. In fact, many patient who come in to discuss chin implants (which require surgery) will opt first for a Voluma chin augmentation just to see if they like the look. The product is very safe and lasts 2 years or more. You could always proceed to the permanent option (the implant) in the future, or just continue the filler. 
I would recommend combining this with refinement of your neckline by eliminating submental fat (the "double chin"), either by liposuction (which is technically a surgery, though minimally-invasive) or with Kybella, an injectable that can achieve similar results in appropriate patients without surgery. See the video below. I have a Youtube video demonstrating Voluma injections as well, which can be easily found by searching on my name.These nonsurgical procedures can be performed at the same time, during the same visit, if you wish.

Best wishes!  Harry V. Wright MD, Sarasota, Florida

  From the side profile photographs, there appears to be a weak and recessive chin profile for which a chin implant can improve.  Chin implants are manufactured in a large variety of sizes and shapes which is best determined at the time of the consultation and examination.  Chin implants are composed of  solid silicone, and are usually placed under local anesthesia as an outpatient procedure.  Liposuction can accomplish removal of the fatty deposits in the neck which is complementary to the chin implant to improve the chin and jawline.  For more information and many before and after examples of this combination, please see the link and the video below

 Hi I have performed many Chin Augmentations using silastic chin implants for over 30 years.  Looking to your photos, your chin is quite weak and there is slight excess fat and skin which creates a "double chin".   When A weak chin exists, this creates an imbalance making: the nose look larger, the mid face top heavy, the lower face appear to be short, lip fullness is de-emphasized while early formation of a double chin occurs.  I perform Chin augmentation using a silastic chin implant, in 30 minutes or less often using a local anesthetic alone, that will add projection to the chin creating harmony and balance to the lower face. 
 I have found this technique of placing a silastic chin implant, through a small curved incision under the chin (also allows excess skin removal) to be very safe, quick, highly effective and far less invasive than a sliding genioplasty or the even more invasive jaw surgery.  In my humble opinion, you are a good candidate for chin implant surgery.
Hope this helps.