Jaw & chin contouring & feminine V-line architecture.

Sculpting the lower facial third from a broad, square masculine jawline into an elegant, tapered heart-shaped silhouette. Combining ultrasonic mandibular angle reduction, lateral cortical bone thinning, and T-osteotomy sliding genioplasty through 100% scarless intraoral incisions.

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100% ScarlessTransoral mucosal incisions hidden entirely inside the mouth with zero external facial scars

T-Osteotomy ChinCentral bone segment removal and narrowing converting a wide, square chin into a delicate V-point

3D Nerve MappingCone-beam CT tracking of the inferior alveolar and mental nerves ensuring total sensory safety

1–2 Nights InpatientPrivate JCI-accredited hospital suite stay with hilotherapy cooling and luxury sanctuary aftercare

Lower third mastery

Anatomical pillars of V-line jaw & chin feminization

Executed in Bangkok by board-certified craniofacial and maxillofacial surgeons utilizing 3D CBCT nerve navigation and ultrasonic piezoelectric bone saws to remodel the entire mandibular arc.

01Gonial angle sculpting

Mandibular angle resection & long-curved osteotomy

Biological male mandibles exhibit low, flaring gonial angles and a wide bigonial distance that create a heavy, square lower face. Using ultrasonic piezosurgery via an intraoral incision, we perform a long-curved mandibular osteotomy—removing the flared posterior angle and smoothing the inferior border from below the ear all the way to the chin without secondary step-off deformities.

Elimination of square, flaring posterior jaw corners in profile and frontal views
Elevation of the gonial angle to a higher, softer feminine inclination (~125°–130°)
Continuous long-curved bone cut preventing unnatural "second angle" notches
Optional partial masseter muscle reduction for bulky lateral muscular hypertrophy

02Frontal slimming

Outer cortical bone shaving & body tapering

Resecting the lower jaw angle alone improves the side profile, but true frontal V-line slimming requires reducing the thickness of the mandible itself. Because the jawbone consists of three layers (outer cortex, spongy marrow, and inner cortex), our surgeons selectively shave and thin the thick outer cortical plate, dramatically narrowing the lower face when viewed straight-on.

Reduction of lateral bone thickness by 3 to 5 mm per side without weakening jaw strength
Sub-millimeter ultrasonic burring that spares the deep inferior alveolar nerve canal
Seamless tapering from the mandibular ramus forward into the mental symphysis
Transforms a U-shaped masculine jaw frame into a slender oval or heart-shaped contour

03Chin convergence

T-osteotomy genioplasty & mentalis suspension

Masculine chins are vertically tall, broad, and flat at the base with two distinct lateral corners. We perform a precision T-shaped osteotomy: making one horizontal cut below the mental nerves and two vertical cuts to remove a central trapezoidal bone wedge. The two lateral chin segments are brought together at the midline and fixed with titanium micro-plates, narrowing width, shortening height, and adjusting projection.

Narrowing of wide square chins into a single, delicate central feminine point
Vertical height reduction via bone wedge removal (superior impaction)
Anterior-posterior sliding capability to correct receding or overly prominent chins
Anatomical mentalis muscle resuspension preventing post-operative chin ptosis ("witch's chin")

Clinical scope

Comprehensive V-line vs. targeted chin & soft-tissue protocols

Because every patient presents a distinct balance of skeletal width, chin projection, and submental soft-tissue elasticity, we customize the osteotomy blueprint to your exact 3D CBCT scan.

Complete lower-third transformation

Full 360° V-line mandibuloplasty & T-genioplasty

The definitive craniofacial protocol for transfeminine patients with wide, angular jawlines, pronounced gonial flare, and tall or square masculine chins.

Unified inferior border sweep: Connects the T-osteotomy chin narrowing directly into a long-curved mandibular body and angle resection with zero step-offs.
Cortical thickness reduction: Simultaneous outer plate burring and selective masseter muscle electrocautery for maximum frontal narrowing.
Mentalis & periosteal redraping: Deep-layer resorbable sutures anchor the chin pad and submandibular periosteum tightly against the newly reduced bone frame.
Invisible intraoral access: Performed entirely through the lower gingival sulcus with dissolvable sutures—leaving no visible trace on the skin.

Targeted & soft-tissue synergy

Sliding genioplasty & submental soft-tissue sculpting

Designed for patients whose posterior jaw angles are already naturally narrow, or mature patients who require simultaneous skin and platysmal tightening after bone reduction.

Isolated T-genioplasty or sliding advancement: Reshapes, narrows, or advances a weak/recessed chin to improve neck-to-chin cervicomental definition without touching the posterior jaw.
Preventing soft-tissue laxity: When significant bone volume is removed in patients over 35–40, we pair V-line surgery with submental micro-liposuction, Renuvion/FaceTite, or a deep-plane neck lift.
Zero foreign chin implants: Uses 100% of your own living bone rather than silicone chin implants that can erode bone, shift, or look overly masculine.
Synergy with tracheal shave: Easily combined with Adam's apple reduction and cheek augmentation in the same operative session.

Clinical pathway

The V-line jaw & chin transformation timeline

From 3D Cone-Beam CT nerve mapping and virtual osteotomy design to inpatient hospital care and progressive lower-face contouring in Bangkok.

Phase 1

3D CBCT nerve mapping & virtual osteotomy simulation

High-definition 3D Cone-Beam Computed Tomography (CBCT) maps the exact millimeter depth and exit foramen of the inferior alveolar and mental nerves inside your jawbone. Your maxillofacial surgeon designs the exact osteotomy cut lines virtually to maximize bone reduction while maintaining a strict safety margin around the nerve canal and tooth roots.

Duration: Pre-op planning & day 1 in Bangkok

Phase 2

Ultrasonic intraoral surgery & JCI hospital recovery

A 2.5 to 4-hour procedure under general anesthesia in our JCI-accredited hospital tower. Through hidden intraoral mucosal incisions, ultrasonic piezosurgery executes the T-osteotomy chin narrowing, cortical shaving, and mandibular angle resection. Low-profile titanium micro-plates secure the chin, and a tailored elastic compression garment is applied. One to two nights inpatient stay with IV analgesia and continuous hilotherapy cooling.

Duration: 1 to 2 nights inpatient

Phase 3

Luxury sanctuary suite, liquid-to-soft diet & oral care

Chauffeured transfer to your private recovery hotel suite. You follow a nutritious liquid diet for the first 3–5 days, transitioning to soft foods (soups, smoothies, scrambled eggs, soft pasta) for 2 weeks alongside antiseptic mouth rinses after every meal. Private nurses visit daily for lymphatic red-light therapy and compression garment adjustments prior to your day 10–14 fit-to-fly clearance.

Duration: 10 to 14 days in Bangkok

Phase 4

Osseointegration, soft-tissue redraping & V-line definition

Intraoral sutures dissolve naturally within 2 to 3 weeks. About 60–70% of lower-face swelling resolves by week 4, revealing a noticeably narrower, softer jawline. Over 3 to 6+ months, bone segments complete full osseointegration and the overlying periosteum and skin envelope tightly contract around your new feminine V-line foundation.

Duration: Month 1 to 6+

Clinical comparison

V-line osteotomy vs. surface burring & non-surgical options

Compare comprehensive 3D V-line mandibuloplasty and T-genioplasty against simple chin burring, silicone implants, and temporary masseter neurotoxins.

Clinical parameters	Full V-line & T-genioplasty Sissy Clinic benchmark	Simple chin & jaw burring	Masseter Botox & chin fillers
Anatomical scope	3D bone resection, cortical thinning & T-osteotomy	Superficial outer bone shaving only	Muscle atrophy & soft-tissue volume addition
Chin narrowing & height	Removes central wedge (Narrows & shortens chin)	Minimal (Excess burring causes sagging chin pad)	Adds volume (Makes lower face longer/heavier)
Mandibular angle change	Long-curved osteotomy removes square flare	Rounds edges slightly (Cannot remove large flare)	Only shrinks muscle, leaves square bone intact
Soft-tissue ptosis prevention	Preserves muscle attachment on repositioned bone	High risk of "witch's chin" if over-shaved	Can cause jowling as filler migrates
Incision & scar profile	100% scarless intraoral mucosal access	Intraoral or submental external scar	Needle injections (Zero downtime)
Nerve safety protocol	3D CBCT mapping + ultrasonic piezosurgery	Rotary mechanical burr	Topical / injectable
Permanence	Permanent skeletal transformation	Permanent (Limited visual impact)	Temporary (Requires repeat injections every 4–9 mos)

Sissy Clinic benchmark

Full V-line & T-genioplasty

Long-curved mandibular angle reduction, lateral cortical thinning, and T-osteotomy chin convergence.

Anatomical scope: 3D osteotomy & cortical thinning
Chin refinement: T-osteotomy wedge narrowing
Jaw angle change: Complete removal of square flare
Soft-tissue support: Preserves mentalis bone attachment
Scar profile: 100% scarless intraoral access
Permanence: Permanent skeletal feminization

Simple chin & jaw burring

Surface shaving of the bone perimeter without structural T-osteotomy or angle resection.

Anatomical scope: Superficial cortical shaving
Chin refinement: Minimal (2–3 mm surface limit)
Jaw angle change: Mild corner rounding only
Soft-tissue support: Risk of chin pad sagging if over-burred
Scar profile: Intraoral or under-chin incision
Permanence: Permanent (Modest contour change)

Masseter Botox & chin fillers

Temporary non-surgical injections that shrink chewing muscles or add filler to the chin tip.

Anatomical scope: Muscle & soft tissue only
Chin refinement: Adds volume (Increases chin length)
Jaw angle change: Zero bone reduction
Soft-tissue support: Risk of filler migration over time
Scar profile: Non-surgical needles
Permanence: Temporary (4–9 months)

Patient inquiries

Frequently asked questions

Authoritative medical answers regarding T-osteotomy mechanics, mental nerve protection, skin elasticity after bone reduction, and intraoral recovery.

Why is a T-osteotomy genioplasty preferred over simple chin bone shaving?

When a wide, tall masculine chin is merely burred down from the outside, the periosteum and mentalis muscle attachments are stripped away from the lower border, and the overlying soft-tissue pad loses its bony support—frequently resulting in a drooping, blunted "witch's chin" deformity that actually looks wider rather than narrower. A T-osteotomy removes a central vertical wedge of bone from the middle of the chin and brings the two lateral bone segments together. Because the soft tissues remain attached to the living bone segments as they move inward and upward, the chin narrows and shortens dramatically while keeping the skin envelope taut and defined.

Where are the incisions placed, and will there be any external scars on my neck or face?

No external incisions are ever used for V-line jaw and chin contouring. The entire procedure is performed through transoral incisions hidden inside the mouth along the lower gumvestibule (gingivobuccal sulcus). We close the mucosal lining with soft, antimicrobial dissolvable sutures that absorb on their own over 2 to 3 weeks, leaving zero visible scars on your face, jawline, or neck.

How do you protect the nerves that control lower lip sensation and smiling?

Safety begins with a pre-operative 3D Cone-Beam CT (CBCT) scan that maps the exact path of the inferior alveolar nerve inside the jawbone and the mental foramen where it exits near the chin. During surgery, our maxillofacial specialists work strictly in the subperiosteal plane (beneath the muscle layer where facial motor nerves reside, so your smile movement is never jeopardized) and utilize ultrasonic piezoelectric saws. Piezosurgery cuts only mineralized bone at ultrasonic frequencies and immediately stops if it contacts soft nerve tissue. Temporary numbness or tingling in the lower lip and chin is normal due to gentle tissue retraction and resolves progressively over 1 to 6 months.

Will reducing my jawbone cause loose skin or jowling under my chin?

In younger patients with good skin elasticity (typically under 35–38), the periosteum and skin envelope naturally contract and redrape tightly around the new V-line contour aided by our post-operative compression garment protocol and mentalis muscle suspension. For mature patients, patients with pre-existing submental fullness, or those undergoing aggressive bone reduction, we proactively combine V-line osteotomy with submental micro-liposuction, radiofrequency skin tightening, or a deep-plane lower face and neck lift so your new jawline remains crisp and sculpted.

Are the titanium micro-plates detectable, and can they set off airport security scanners?

We utilize ultra-low-profile, medical-grade titanium micro-plates (or optional biocompatible resorbable plates) to lock the T-osteotomy chin segments in place. Titanium is 100% non-ferromagnetic, meaning it will never trigger airport metal detectors or interfere with future MRI scans, and it cannot be felt through the skin. If a patient ever wishes to have the plates removed for personal preference once the bone has completely fused (after 6 to 12 months), they can be removed easily in a minor outpatient visit.

Bespoke transformation protocol