5 Proven Techniques to Enhance the Efficacy of Submental Liposuction Combined with Orthognathic Surgery for Asian Double Chin
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Introduction
Double chin deformity — defined clinically as excess submental adiposity with loss of cervicomental definition — not only ages the face but alters perceived facial harmony. While isolated submental liposuction is a well‑established approach for superficial fat removal, combining it with orthognathic surgery (which repositions the maxillomandibular complex) can address underlying skeletal imbalances that contribute to poor neck aesthetics. A recent systematic review evaluated the efficacy of this combined strategy, though current literature lacks large, standardized cohorts
Figure 1. Chin Liposuction in Korea (2025)
Why Combine Orthognathic Surgery with Submental Liposuction?
Orthognathic surgery — such as mandibular advancement or setback — improves occlusal function and facial skeleton alignment. However, soft‑tissue response to skeletal movement is unpredictable:
Class II (retrognathic) patients frequently present with a convex profile, retruded mandible, and obtuse cervicomental angle.
Conversely, Class III (prognathic) setbacks can create submandibular flaccidity that diminishes neck definition.
When submental lipomatosis co‑exists, orthognathic corrections alone may not optimize neck contour, prompting adjunctive liposuction to refine submental fat and improve the cervicomental angle.
Figure 2. Submental incision for medial platysmaplasty. (A) Inferior view; note the relationship with the hyoid bone.
(B) Dissection area available through the described incision
Figure 3. Technical illustration showing thread placement design for double chin lifting using reverse technique with I-shaped cogged threads. (The tread that has been used is LVDR LIFT, Sihler Inc., Seoul, Korea and The thread that is used are 10 cm length of Secret Illusion (Hyundae Meditech Inc., Wonju, Republic of Korea) and LVDR, Sihler thread (Sihler Inc., Seoul, Republic of Korea)
5 Key Techniques for Optimized Outcomes
1. Synchronous Submental Liposuction at Time of Orthognathic Osteotomies
Performing submental liposuction at the time of orthognathic surgery allows direct access and minimizes additional anesthesia and recovery time. In one cohort study from 1989–1990 (22 patients), combined procedures produced:
Improved submandibular contour
Greater cervicomental angle definition
High patient satisfaction
Minimal complications reported in that surgical era.
Though early, these findings support the safety and aesthetic benefit of simultaneous intervention. 2. Tailoring Cannula Technique to Tissue Characteristics Asian patients frequently exhibit thicker subcutaneous fat and variable skin elasticity, which can influence liposuction efficiency. Precise use of micro‑cannulas and meticulous fat aspiration in the superficial layer improves neck contour without excessive disruption of lymphatics or soft tissue. While this practice is surgeon‑dependent and not specifically quantified in the orthognathic liposuction literature, it remains a core principle in aesthetic neck contouring. 3. Use of Quantitative Outcome Measures The systematic review highlighted heterogeneity in outcome assessment across studies — with evaluations ranging from surgeon visual scales to clinical exams and cephalometric analyses.
For more objective metrics in future studies and clinical practice, surgeons can adopt:
Photogrammetry for cervicomental angle measurements
Cephalometric analysis for skeletal and soft‑tissue correlation
Ultrasound or tissue caliper adipometry to track submental adipose changes quantitatively
Standardized metrics will bolster evidence quality and enable cross‑study comparison.
4. Strategic Soft Tissue Management Beyond Fat Removal
Submental fat is only part of the picture. After orthognathic repositioning, soft tissue redundancy, laxity, and platysmal banding may persist. Techniques to augment outcomes include:
Submentoplasty (direct excision and tightening of submental soft tissue)
Platysma plication or corset suturing in patients with significant platysmal laxity
Adjunctive tightening modalities (e.g., RF‑assisted liposuction) — though high‑intensity focused ultrasound (HIFU) has shown promise in Asian cohorts for non‑surgical fat reduction and skin tightening, it remains a complementary approach outside of orthognathic contexts.
5. Meticulous Risk Mitigation and Patient Selection Although the systematic review found low complication rates overall, documented adverse events included sensory changes, infection, and irregularities.
Key considerations for safe practice:
Assess nerve anatomy and surgical planes carefully to minimize sensory deficits.
Plan incisions and fat trajectories to respect skin and lymphatic integrity.
Educate patients on realistic outcomes and the potential need for additional soft‑tissue procedures.
Operative Strategy for Asian Patients
Asian patients often present unique anatomical considerations that influence surgical planning for combined submental liposuction and orthognathic surgery:
Fat Distribution and Skin Elasticity
Asians tend to have thicker subcutaneous fat in the submental region.
Skin elasticity varies; younger patients may benefit from standard micro-cannula liposuction, while older patients may require platysma plication or adjunct skin-tightening techniques (RF-assisted liposuction, minimal submental excision).
Skeletal Considerations
Retrognathic mandible (Class II) often leads to a more obtuse cervicomental angle.
Mandibular advancement or genioplasty can optimize chin projection, which should be planned concurrently with fat removal for ideal neck contour.
Figure 4. Submental-Cervical Angle: Perceived Attractiveness and Threshold Values of Desire for Surgery
Cannula and Plane Selection
Use micro-cannulas (1–2 mm) in the superficial fat plane to reduce irregularities and preserve lymphatic and vascular structures.
Deeper fat may be addressed selectively; avoid aggressive suction near platysmal borders to prevent contour deformities.
Timing of Procedures
Liposuction can be performed synchronously with orthognathic osteotomies to minimize recovery time and allow soft tissue to adapt to skeletal repositioning.
Complications and Risk Mitigation Even though combined procedures are generally safe, surgeons must anticipate and mitigate potential complications:
Complication | Incidence / Notes | Preventive Strategy |
Hematoma / Ecchymosis | Low-moderate | Careful tumescent infiltration, gentle aspiration, compression garments |
Nerve Injury (mental, marginal mandibular) | Rare | Knowledge of anatomic landmarks, cautious cannula insertion, limited deep plane suction |
Irregular Contour / Asymmetry | Low | Use micro-cannulas, gradual fat removal, intraoperative visual assessment |
Skin Laxity / Sagging | Moderate in older patients | Consider platysma plication, RF-assisted tightening, or small submental excision |
Infection | Very low | Standard sterile technique, prophylactic antibiotics if indicated |
Evidence from systematic reviews and Asian cohort studies shows high patient satisfaction (85–95%) when operative planning accounts for tissue characteristics and careful technique. Clinical Implications for Asian Patients While the specific orthognathic submental liposuction literature does not yet stratify outcomes by ethnicity, anatomic features common in Asian patients — such as thicker subcutaneous fat, distinct cervicomental angle norms, and differences in skin elasticity — arguably influence surgical planning and expectations. Surgeons should integrate this context into preoperative assessment and surgical design.
Summary and Future Directions
Combining submental liposuction with orthognathic surgery has been shown to improve submental contour and cervicomental aesthetics with an acceptable safety profile, and it should be considered when skeletal alignment alone cannot correct underlying soft‑tissue excess.
However, current evidence is limited by small sample sizes, lack of standardized outcome measures, and absence of large trials — especially in ethnically specific populations. Future research should adopt metric assessment protocols and recruit larger cohorts to validate long‑term efficacy in Asian patients.
Figure 5. Combining submental liposuction with orthognathic surgery Results
Reference:
Bachesk, A. B., & colleagues. (2024). Assessing the efficacy of submental liposuction association in orthognathic surgery: A systematic review. Annals of Plastic Surgery. https://pubmed.ncbi.nlm.nih.gov/39158342/
Bach, D. E., et al. (1991). Simultaneous orthognathic surgery and cervicomental liposuction: Clinical and survey results. Oral Surgery, Oral Medicine, Oral Pathology, 71(5), 551–557. https://pubmed.ncbi.nlm.nih.gov/2011346/
Goo, B., et al. (2025). Efficacy and safety of high-intensity focused ultrasound on reduction of unwanted submental fat in Asian patients. Aesthetic Plastic Surgery. https://pubmed.ncbi.nlm.nih.gov/40355620/
ShihChun, Y., et al. (2023). Bipolar radiofrequency-assisted liposuction for cervical contouring in Eastern Asians. Journal of Clinical Medicine, 12(3), 1226. https://www.mdpi.com/2077-0383/12/3/1226
ResearchGate. (2015). Submental-cervical angle: Perceived attractiveness and threshold values of desire for surgery. https://www.researchgate.net/publication/286652625_Submental-Cervical_Angle_Perceived_Attractiveness_and_Threshold_Values_of_Desire_for_Surgery
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