Kare Plastic Surgery · Dermatology · Santa Monica & Los Angeles
Ultherapy Jawline Sculpting Santa Monica
804 7th Street, Santa Monica, CA 90403 · (310) 998-5533
FDA-cleared Ultherapy skin tightening combined with Masseter Botox jaw slimming, non-surgical jawline contouring, jowl lifting, and neck tightening by board-certified dermatologist Dr. Tiffany Sierro
Call (310) 998-5533 Schedule a Consultation
BoardCertified Dermatologist
UltherapyFDA-Cleared Lifting
Ultherapy Jawline Sculpting Santa Monica
Jawline ContouringWithout Surgery, Without Downtime.
Dr. Tiffany Sierro, MD Board-Certified Dermatologist Ultherapy · Masseter Botox · Jawline Sculpting · Jowl Lifting · Neck Tightening · Kare Plastic Surgery, Santa Monica
A well-defined jawline is one of the most powerful markers of youth and facial harmony — and one of the first features to soften with age. As the SMAS layer beneath the skin loses structural integrity, the skin of the jowl zone descends over the mandibular border, blurring the clean jawline definition that characterizes a youthful face.
At Kare Plastic Surgery, Tiffany Sierro, MD approaches jawline sculpting as a two-dimensional problem requiring a two-treatment solution. Ultherapy — the only FDA-cleared focused ultrasound skin lifting treatment that reaches the SMAS layer non-invasively — lifts and tightens lax jowl and jawline skin from within. Masseter Botox reduces the bulky masseter muscle at the jaw angle — slimming the lower face and creating a more tapered facial shape. Together, they produce a comprehensive jawline transformation that neither treatment achieves alone.
Kare Plastic Surgery · Santa Monica · (310) 998-5533
Interested in a defined jawline without surgery? Schedule your Ultherapy consultation with Dr. Sierro today.
Clinical Results — Ultherapy Jawline · Dr. Tiffany Sierro · Kare Plastic Surgery
Ultherapy Jawline & Neck Contouring — Before & After 180 Days
Ultherapy jawline sculpting and neck tightening · Pre-treatment and post-treatment at 180 days · FDA-cleared treatment · Courtesy Ultherapy / Merz · Individual results may vary
Ultherapy Jawline Sculpting & Neck Tightening · Pre-Treatment vs. 180 Days · Dr. Sierro · Kare Plastic Surgery Visible jawline definition, jowl reduction, improved mandibular border clarity, and neck skin tightening at 180 days post-Ultherapy · Courtesy Ultherapy/Merz · Individual results may vary
The Result
This patient demonstrates the classic Ultherapy jawline result at 180 days — improved definition of the mandibular border, visible reduction of jowl volume, and tightening of the submental and neck skin. The improvement develops progressively as new collagen matures, with most patients seeing the full benefit between 3–6 months post-treatment.
How Ultherapy Works
Ultherapy delivers focused ultrasound energy at precise depths — 1.5mm, 3.0mm, and 4.5mm — targeting the SMAS layer at 4.5mm, the same fibromuscular layer addressed surgically in a facelift. The thermal injury at the SMAS stimulates a wound-healing collagen response, producing progressive lifting and tightening without surgery, injection, or downtime.
Dr. Sierro's Approach
Dr. Sierro uses real-time ultrasound imaging during every Ultherapy treatment to visualize the tissue layers being treated and confirm accurate energy delivery at the correct depth. This imaging guidance — a defining feature of Ultherapy that no other energy device offers — ensures that the SMAS layer is targeted precisely and that superficial structures are avoided.
The Kare Jawline Protocol
Two-Treatment Non-Surgical Jawline Sculpting Protocol
Dr. Sierro's jawline sculpting protocol addresses the two anatomical contributors to a soft, undefined jawline — lax SMAS and skin tissue on the jawline and jowl zone (treated with Ultherapy) and excessive masseter bulk at the jaw angle (treated with Masseter Botox). Performed together, they create a synergistic result that is significantly more comprehensive than either treatment alone.
Step 1 — Ultherapy: Lift & Tighten
Ultherapy is delivered along the mandibular border, jowl zone, cheek, and submental/neck area using a customized transducer sequence selected by Dr. Sierro based on the patient's tissue depth and treatment goals. The 4.5mm transducer targets the SMAS layer for maximum lift; the 3.0mm transducer addresses the deep dermis for collagen remodeling; the 1.5mm transducer refines the superficial skin for surface tightening. The full session takes 60–90 minutes. No anesthesia, no downtime. Results develop progressively over 3–6 months.
Step 2 — Masseter Botox: Slim & Define
Masseter Botox is injected into the masseter muscle at the angle of the jaw — the large chewing muscle whose hypertrophy creates a wide, square lower face in some patients. Dr. Sierro uses precise multi-point injection technique with 20–40 units per side (Botox) or equivalent Dysport dosing. Over 4–6 weeks, the masseter gradually reduces in bulk — slimming the lower face and creating a more tapered oval facial shape that complements the jawline lifting produced by Ultherapy. Masseter Botox results last 4–6 months.
Timeline & Results
Masseter Botox results appear at 4–6 weeks as the masseter reduces in bulk. Ultherapy results develop progressively over 3–6 months as new collagen matures — with peak improvement at 6 months. The two timelines complement each other: Masseter Botox delivers visible jawline slimming first, while Ultherapy continues producing its lifting and tightening benefit in parallel. Annual Masseter Botox maintenance and biennial Ultherapy maintenance sustain the combined result over time.
Who Is the Ideal Candidate
The ideal Ultherapy jawline candidate is a patient with mild to moderate skin laxity and jowling — early to mid-stage jawline loss — who prefers a non-surgical approach and is willing to accept a gradual result rather than immediate surgical lifting. Masseter Botox adds meaningful benefit for patients whose jawline appears wide or square due to masseter hypertrophy. Dr. Sierro evaluates each patient individually and recommends the combination most likely to achieve their goals within their downtime preferences.
Who Benefits Most from the Jawline Sculpting Protocol
Early Jowling
Patients with mild to moderate jowling and early loss of mandibular border definition — where the jawline is softening but not yet significantly ptotic. Ultherapy produces its strongest results in this cohort, where sufficient skin tone remains for effective collagen-driven lifting.
Wide / Square Jaw
Patients with masseter hypertrophy producing a wide, square, or heavy lower face — from teeth grinding (bruxism), jaw clenching, or genetic masseter muscle prominence. Masseter Botox reduces the masseter bulk, slimming the lower face and creating a more tapered, oval facial shape.
No-Downtime Preference
Busy professionals, patients between major procedures, and anyone who prefers to avoid surgical recovery benefit from the zero-downtime profile of the Ultherapy and Masseter Botox combination — no anesthesia, no incisions, no recovery period, and no time away from work or social activities.
Surgical Maintenance
Post-facelift patients who want to extend the longevity of their surgical result by maintaining skin tightness and tissue support with periodic Ultherapy treatments — slowing the natural aging of the lifted tissue between procedures.
Bruxism / Jaw Clenching
Patients with bruxism or chronic jaw clenching — who experience both jaw pain and masseter hypertrophy — benefit from Masseter Botox for both functional pain relief and cosmetic lower face slimming. Dr. Sierro addresses both the cosmetic and functional components of masseter hypertrophy.
Neck & Submental Laxity
Patients whose primary concern is neck laxity, submental skin looseness, or early banding — where Ultherapy's 4.5mm SMAS-depth transducer can produce meaningful tightening of the platysmal region and overlying neck skin as an adjunct to the jawline treatment.
Ultherapy is the only FDA-cleared non-invasive treatment for lifting skin on the neck, chin, and brow — and the only energy device that images the tissue in real time during treatment to confirm accurate energy delivery at the SMAS depth. At Kare Plastic Surgery in Santa Monica, Dr. Sierro uses the full transducer sequence — 4.5mm, 3.0mm, and 1.5mm — tailored to each patient's anatomy and treatment goals. Call (310) 998-5533 to schedule a jawline sculpting consultation.
"Ultherapy uses focused energy to tighten the deep scaffold support of the face and neck. "
— Dr. Tiffany Sierro, MD · Board-Certified Dermatologist · Kare Plastic Surgery, Santa Monica
Frequently Asked Questions
What is Ultherapy jawline sculpting and how does it work?
Ultherapy delivers focused ultrasound energy to the SMAS layer — the same tissue addressed in surgical facelifts — stimulating new collagen production that progressively lifts and tightens the jawline and jowl zone over 3–6 months. Dr. Sierro combines Ultherapy with Masseter Botox for comprehensive non-surgical jawline sculpting at Kare Plastic Surgery in Santa Monica. Call (310) 998-5533.
What is the difference between Ultherapy and Masseter Botox for the jawline?
Ultherapy lifts and tightens lax skin and soft tissue along the jawline and jowl zone. Masseter Botox slims the lower face by reducing the bulk of the masseter muscle at the jaw angle. Combined, they address both skin laxity and muscle bulk — producing a more comprehensive jawline result than either treatment alone. Dr. Sierro designs individualized jawline sculpting protocols at Kare Plastic Surgery. Call (310) 998-5533.
How long does Ultherapy jawline lifting last?
Ultherapy results develop over 3–6 months and typically last 1–2 years. Annual or biennial maintenance treatments sustain the lifting and tightening benefit. Masseter Botox results last 4–6 months with maintenance every 6 months. Dr. Sierro provides individualized treatment planning at Kare Plastic Surgery in Santa Monica. Call (310) 998-5533.
Schedule Your Jawline Sculpting Consultation
Kare Plastic Surgery · Santa Monica · 804 7th Street
Define Your Jawline with Dr. Sierro
Dr. Tiffany Sierro, board-certified dermatologist at Kare Plastic Surgery, provides expert Ultherapy jawline sculpting and Masseter Botox jaw slimming for patients throughout Santa Monica and Los Angeles — FDA-cleared focused ultrasound lifting, real-time ultrasound imaging, and comprehensive non-surgical jawline contouring. Same-week appointments available.