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You are here: Skin Care Research >
Author: Nahm WK; Su TT; Rotunda AM; Moy RL
Author affiliation: University of California, San Diego, School of Medicine, San Diego, California, USA.
Publication date & source: 2004.06, Dermatol Sur, 30(6):922-8; discussion 928
BACKGROUND: Radiofrequency application through a proprietary device has recently been used for facial tissue tightening. Uniform volumetric heating of the dermis is created by passage of electrical current, while protection of the epidermis is maintained by concurrent cryogen cooling. OBJECTIVE: To objectively quantify the effectiveness of volumetric radiofrequency application on the face, we treated 10 patients on the left side of the face with radiofrequency and evaluated the changes in brow position, superior palpebral crease, angle of the eyebrow, and jowl surface area. METHODS: Uniform treatments were applied at 134 J/cm(2) to the left side of the forehead and 1 cm past midline, at 115 J/cm(2) to the left side of temple and cheeks, and at 97 J/cm(2) to the left side of the jaw line and inferior postauricular surface. Patients were evaluated at monthly intervals up to 3 months with digital photography. Morphologic changes were evaluated with the "measuring tool" and "angle tool" of the Mirror Suite imaging system for aligned frontal-view photographs (for eyebrow position, superior palpebral crease elevation, and eyebrow angle changes) and the "outline tool" for aligned oblique-view photographs (for jowl surface area changes). RESULTS: At the end of 3 months on the side that was treated, patients exhibited on average 4.3 mm of brow elevation and 1.9 mm of superior palpebral crease elevation along the midpupillary line and an average of 2.4 mm of brow elevation along the lateral canthal line. There was no significant improvement of brow elevation along the lateral canthal line on the contralateral side. The peak angle of the ipsilateral eyebrow became slightly more acute by an average of 4.5 degrees after treatments. Moreover, the jowls on the lower part of the face, displayed a mean decrease of 22.6% in surface area after treatments. The nontreated side displayed a lack of eyebrow angle and jowl surface area changes. CONCLUSIONS: The application of radiofrequency to the face provides quantifiable changes. The brow along the midpupillary line is elevated to a greater degree than the lateral brow. This is consistent with acute angle changes seen in the eyebrow. Improvements in the lower part of the face with radiofrequency application can be quantified by demonstrating a decrease jowl surface. Moreover, these measurement techniques can be useful tools for evaluating other treatment parameters with radiofrequency application.
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