Plasma skin resurfacing: personal experience and long-term results.

This article presents a comprehensive clinical approach to plasma resurfacing for skin regeneration. Plasma technology, preoperative protocols, resurfacing technique, postoperative care, clinical outcomes, evidence-based results, and appropriate candidates for this procedure are discussed. Specific penetration depth and specific laser energy measurements are provided. Nitrogen plasma skin regeneration is a skin-resurfacing technique that offers excellent improvement of mild to moderate skin wrinkles and overall skin rejuvenation. It also provides excellent improvement in uniformity of skin color and texture in patients with hyperpigmentation with Fitzpatrick skin types 1 through 4.

The biology of facial fillers.

The biologic behavior of a facial filler determines its advantages and disadvantages. The purpose of this article is to look at the relevant biology as part of a logical basis for making treatment decisions. Historical perspectives and biologic characteristics such as local tissue reaction (including phagocytosis and granulomatous inflammation) cross-linking, particle concentration, immunogenicity, biofilm formation, gel hardness, and collagen neogenesis are considered. Bovine collagen is the most immunogenic facial filler. Porcine and bioengineered human collagen implants have very low immunogenicity, but allergic reactions and elevations of IgG are possible. Cross-linking and concentration affect the longevity of collagen and hyaluronic acid fillers. Gel hardness affects how a hyaluronic acid filler flows through the syringe and needle. Calcium hydroxylapatite, poly-L-lactic acid, and polymethylmethacrylate fillers have been shown to stimulate collagen neogenesis. It appears that any facial filler can form a granuloma. Bacterial biofilms may play a role in the activation of quiescent granulomas. Various authors interpret the definition and significance of a granuloma differently.

Excision of head and neck basal cell carcinoma with a rapid, cross-sectional, frozen-section technique.

OBJECTIVES: To compare a rapid, cross-sectional frozen-section technique with Mohs micrographic surgery, using recurrence rate and cost of treatment for excision of basal cell carcinoma as indicators to validate our indications for Mohs surgery. DESIGN: Retrospective study of 557 head and neck basal cell carcinomas excised over 10 years. MAIN OUTCOME MEASURES: Recurrence rates; tumor comparisons by size, location, and subtype; a life table, and a patient satisfaction survey. RESULTS: Recurrence rate for the cross-sectional technique was 2.1% at 5 years. Recurrent tumors had an average diameter of 1.56 cm (vs 1.04 cm for nonrecurrent tumors). Recurrences were in the cheek (30%), nose (20%), temple (20%), forehead/brow (10%), conchal bowl (10%), and postauricular crease (10%). Recurrences were nodular cystic (40%), micronodular (20%), multifocal (10%), and infiltrating (30%). A total of 86.6% of patients surveyed rated the aesthetic outcome of their surgery favorably. The cost compared with the cost of Mohs excision varied depending on the Current Procedural Terminology coding technique. CONCLUSIONS: Cross-sectional frozen-section recurrence rates can compare favorably with Mohs micrographic surgery. The cross-sectional frozen-section technique generated a cost savings over Mohs surgery that may not hold true for all practice settings. Margin size did not adversely affect aesthetic results. Loupe magnification x2.5 is important in our technique. We also offer a useful definition for recurrence.