Dr. Andrew Jacono Refines Jawline Contouring in 2019 Study

Even an established surgical technique benefits from revisiting its weaker points, and in 2019 Dr. Andrew Jacono published a refinement to his deep-plane facelift aimed squarely at jawline definition and volume in the lower face. The update built on nearly two decades of case experience with the original method, giving Jacono a large enough patient base to identify exactly where the lower face needed a more targeted solution.

Measuring the Jawline Directly

One notable feature of Dr. Andrew Jacono’s 2019 work was its introduction of the mandibular defining line, a measurement used to track jawline contour improvements with more precision than visual comparison alone allows. Facial plastic surgery has historically relied on before-and-after photographs to demonstrate results, a format that invites subjective judgment. Quantifying jawline change gave the refinement a stronger evidentiary basis and let Jacono compare outcomes across patients in a way earlier facelift research rarely attempted.

Building on the Original Technique

The 2019 modifications did not replace the core extended deep-plane approach that Dr. Andrew Jacono had already documented in a 2011 paper in the Aesthetic Surgery Journal covering 153 patients. Instead, they extended it, adding specific attention to volume enhancement in the lower face alongside the ligament release and vertical repositioning that define the original technique. The jawline has long been one of the more visible markers of facial aging, and addressing it with the same deep-plane logic used elsewhere in the face, working beneath the SMAS rather than simply tightening skin over it, kept the refinement consistent with the surgeon’s broader approach.

Dr. Andrew Jacono now performs about 250 extended deep-plane facelifts each year at his Manhattan practice, and the jawline-focused techniques from his 2019 study have become part of that standard procedure. His 2021 textbook, drawing on more than 2,000 facelift cases, incorporated these refinements into the reference material other surgeons now consult when studying the method, giving the jawline update a permanent place alongside the original 2011 research. Refer to this article for additional information.

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Even an established surgical technique benefits from revisiting its weaker points, and in 2019 Dr. Andrew Jacono published a refinement to his deep-plane facelift aimed squarely at jawline definition and volume in the lower face. The update built on nearly two decades of case experience with the original method, giving Jacono a large enough patient…