Introduction: Aging is considered to be a set of inevitable and irreversible physiological changes. Several techniques have been used with the aim of slowing down and even reversing this process. Objective: To compare the efficacy and local side effects of two phenol-based formulas: the Baker-Gordon formula and the Hetter formula. Methods: Seven pacients were included in a split-face comparative study. The Baker-Gondon and the Hetter formulas were applied on the right and left facial sides respectively. The pain felt during the procedure and intensity of clinical changes in the period following the peeling were measured through a 3 degrees subjetive scale, for each side of the face. The clinic results after 6 months were evaluated by patients and the doctor Who performed the procedures. Results: The pain intensity during the procedure was equivalent for both formulas. With the Hetter''''''''s formula the skin''''''''s integrity was restored more quickly and the undesirable effects were of lower intensity. Regarding the final clinical results two patients preferred the Baker-Gordon formula, one gave preference to the Hetter''''''''s formula and for 4 patients the results were unconcerned. In the medical evaluation, 5 patients had similar results on both facial sides , while 2 presented better clinical results with each formula, respectively. Conclusion: The Gordon-Baker and the Hetter formulas are equivalent for the treatment of facial rhytids.

Keywords: PHENOL, AGING, SKIN AGING, TREATMENT OUTCOME

Acne scars present at the end of the inflammatory phase of acne vulgaris have been treated with procedures that stimulate the production of collagen, such as microneedling. Six patients with acne scars were selected. Microneedling was performed with 2.5 mm needles. Subjective improvement was observed in all patients. In the technique of percutaneous collagen induction there is release of cytokines, growth factors and angiogenesis, with final production of type I collagen, making microneedling an excellent option for the treatment of acne scars, both for its cost/ benefit and for not drawing patients away from their daily activities.

Keywords: ACNE VULGARIS; CICATRIX; TREATMENT OUTCOME