Introduction: Diverse anatomical characteristics and varied kinetic spectra determine the specific contraction patterns of individuals'''''''' frontal facial musculature.
Objective: To identify and classify the frontal facial musculature contraction patterns in patients who sought care for treating frontal facial wrinkles.
Methods: Retrospective analysis of pictures taken from 83 patients.The muscular contraction pattern was classified according to the predominant hyperkinetic area that was observed in the picture in the frontal muscle''''''''s maximum contraction.
Results: Three contraction patterns were identified: total, medial and lateral. In 50.6% of cases, the total pattern was observed: the horizontal rhytids present in the center of the forehead extend laterally beyond the mediopupillary line, up to the end of the brows.The medial pattern was observed in 25.3% of cases: the horizontal rhytids are concentrated in the central region of the forehead, predominantly contained between the mediopupillary lines.The lateral pattern was observed in 24% of the cases: the horizontal rhytids prevail on the sides of the forehead, mainly occurring laterallyto the mediopupillary line.
Conclusions: The identification and classification of Frontalis muscle contraction patterns provides an individualized approach for each patient, which is one of the most important pillars of a successful treatment plan.

Keywords: A BOTULINUM TOXIN TYPE, MUSCLE CONTRACTION, CLASSIFICATION

The use of botulinum toxin and cutaneous filling techniques has encouraged a renewed interest in the study of facial anatomy.An assessment of the influence of facial structures in the aging process requires an in-depth understanding of the constitution of the epidermis, dermis and subcutaneous tissue. It is also essential to study the boundaries of facial segments and bones, the musculature, vascularization, sensory and motor innervation, and the lymphatic drainage of the face.A broad understanding of facial anatomy will help perfect cutaneous filling and botulinum toxin techniques.

Keywords: ANATOMY, BOTULINUM TOXIN TYPE A, INTRADERMAL INJECTIONS

Introdução:There is no standardized approach to immediate post-procedure care for epidermal ablation; the conscientious choice of products can provide greater comfort to the patient, reduced risks and complications, and shorter recovery times. Objective: To analyze the safety and effectiveness of silicone spray in tissular restoration after two epidermal ablation procedures – fractional ablative 2,790 nm YSGG laser and dermabrasion. Methods: Patients with photoaging or acne scars (n = 20) applied silicone spray on one side of the face and liquid Vaseline (control) on the other side of the face after the procedures.Transepidermal loss of water was measured in all patients. Results: Erythema and burning sensation were the most common findings, and were significantly more frequent in the areas where Vaseline was applied. Conclusions: Silicone spray is safe and effective for use after epidermal ablative procedures, and is significantly superior to Vaseline in controlling burning sensations and erythema

Keywords: SILICONES, WOUND HEALING, DERMABRASION, LASER THERAPY

Introduction: For some patients, pain during the injection of botulinum toxin can represent a limitation for performing the procedure. There are doubts about whether the use of topical anesthetic decreases pain or interferes with the treatment's efficacy and duration of effect. Objectives: To study the effect of 4% lidocaine cream in controlling pain during BoNT-A - Speywood Unit botulinum toxin application, comparing it to the vehicle. In addition, the study was aimed at verifying whether the cream influences the treatment's outcome and duration. Methods: An experimental, prospective, double-blind, randomized study was carried out. The pain was assessed through a compartmentalized numerical rating scale (CNRS). The effect was assessed through a four-point contraction qualitative scale. Results: After evaluating the pain scale, higher values were observed in the placebo group when compared to the group that used anesthetic, with statistical significance. Furthermore, there was no statistical difference in the efficacy and duration of effect over weeks 4, 8, 12, and 16. Conclusions: BoNT-A - Speywood Unit toxin was effective and safe for the treatment of glabellar and frontal wrinkles. The use of topical anesthetics (4% lidocaine cream) reduced the pain during the procedure. In addition, there was no interference in the toxin's efficacy and effect duration.

Keywords: BOTULINUM TOXIN TYPE A, LIDOCAINE, PAIN, THERAPY.

Since ancient times, humans have had an interest in improving their body contour. Liquid silicone has been used for this purpose, in order to improve deformities. The authors present a case of a female patient with paralysis in the right lower limb, who underwent improper injections of a large volume of injectable silicone in the affected limb aimed at correcting its contour. Ten years later, the patient developed local complications linked to the silicone injections - localized scleroderma lesions and superficial lipomatous nevus with progressive growth in the affected limb - and clinical and laboratory pictures of rheumatoid arthritis. Injectable liquid silicone should be contraindicated as a substance for implants.

Keywords: POSTOPERATIVE COMPLICATIONS; SILICONES; SKIN NEOPLASMS

Introduction: Although there are differences arising from diverse formulations, botulinum toxin type A is widely marketed in Brazil.
Objective: To compare the efficacy and tolerability of two botulinum toxin type A formulations registered in Brazil: Botulinum toxin type A (Toxin 1) and Onabotulinumtoxin A (Toxin 2), in the treatment of glabellar expression lines through a multicenter prospective, comparative, randomized, double-blind study.
Methods: One hundred fifty-seven patients were randomized at a 1:1 (Toxin 1: Toxin 2) ratio for receiving 20U toxin for the treatment of the glabella's dynamic wrinkles. Photographic records were taken at maximum frowning in five protocol visits by independent evaluators. The assessment of results included: i) percentage of patients with improvement > 1 point in the four-point facial wrinkles scale, at maximum frowning, fifteen days after the treatment; ii) improvement in the static glabellar wrinkles; iii) pain and iv) duration of effect of the toxin.
Results: According to the independent evaluators, two weeks after injection, the rate of response at maximum frowning was 98.4% in the group treated with Toxin 1 and 98.2% in the group treated with Toxin 2. For individuals who received Toxin 1, the authors found an effect's duration of 84.5 ± 38.8 days, while for those who received Toxin 2, the effect's duration was 89.9 ± 41.1 days (p = 0.4303).
Conclusions: Botulinum toxin type A (Toxin 1) and Toxin 2 have similar effectivenesses in the treatment of dynamic glabellar wrinkles. Both preparations were well tolerated.

Keywords: BOTULINUM TOXIN TYPE A; WRINKLES; PROSIGNE; BOTOX

The width of the lower third of the face is mainly determined by the size and shape of the jawbone, the thickness of the masseter muscle and the volume of adjacent subcutaneous tissue. The ideal, culturally recognized pattern for a male face corresponds to a wider lower third and a mandibular angle tending to 90º, while a female face should have a more oval appearance or the shape of a heart, and the middle third wider than the lower third. In order to achieve these aesthetically ideal proportions, botulinum toxin type A (BoNTA) has been successfully applied in the masseter muscle, which is one of the determinates of the lower face's width. Te present article reviews the current literature on the use of botulinum toxin for this purpose, offering the experience of the authors in this practice, aiming at achieving a more harmonious facial contour.

Keywords: BOTULINUM TOXINS, TYPE A; MASSETER MUSCLE; HYPERTROPHY

Introduction: The use of botulinum toxin in the periorbital muscles is aimed at reducing expression lines in that site, correcting the eyebrows' height and treating blepharospasm. However, the application of botulinum toxin in this area can lead to undesirable side effects, such as ptosis, edema in the lower eyelids, artificial appearance of the demarcation area between the orbicularis muscle's treated area and the malar region, ectropion and hematomas.
Objective: To treat the dynamic wrinkles in the lower portion of the orbicularis oculi muscle through injections of microdoses of botulinum toxin.
Methods: A prospective monocentric study with the analytical longitudinal observation of 300 patients undergoing treatment with botulinum toxin microdoses in the lower eyelids' rhytids was carried out. Sociodemographic data, patient satisfaction, dose quantification and complications were analyzed.
Results: Sixty-six percent of the patients showed a total improvement of the wrinkles after the first session. The other required an additional session. Eighty-six percent preferred the treatment with this therapeutic modality.
Conclusions: Despite the great benefit offered by the classic injection points for the treatment of periorbital rhytids types I to III, the authors observed the need to treat rhytids type B (presence of wrinkles on the lower eyelid). Due to the high rate of complications in this region, microdoses of botulinum toxin were proven to be effective and safe.

Keywords: BOTULINUM TOXINS, TYPE A; ESTHETICS; DERMATOLOGY

Introduction: The application of botulinum toxin in the perioral region is a minimally invasive procedure that leads to substantial improvement in the signs of aging in addition to increasing the volume of the lips. However literature on this procedure is still scarce.
Objective: To evaluate changes in shape and volume of the lips, as well as the patients' satisfaction after the application of botulinum toxin in perioral lines.
Methods: Nineteen patients underwent evaluation, photographic record and measurements following the application of botulinum toxin in the perioral region, being subsequently assessed for changes in the lips and satisfaction.
Results: Most of the patients rated their lips as moderately or significantly more attractive after the application of botulinum toxin (p = 0.039). Fifteen women deemed the changes in the lips as a major factor in the overall improvement of their faces.
Conclusions: The use of botulinum toxin in the perioral region leads to the elevation of the upper lip, causing the shortening of the philtrum and the extension of the vermilion. The application of botulinum toxin in the vermilion's border leads to the relaxation of the orbicularis muscle, favoring a more intense tonus effect arising from the upper lip lifting muscles. The patients' satisfaction with the appearance of their lips was evaluated by four additional questions (linked to the lip's shape, volume, attraction and beauty), receiving positive answers. Side effects were minimal.

Keywords: LIP; BOTULINUM TOXINS, TYPE A; BOTULINUM TOXINS

Factitious panniculitis can be triggered by subcutaneous injections of substances linked to esthetic procedures. A case diagnosed and treated as chronic erythema nodosum manifested nodule five years later, with the anatomopathological study suggesting atypical lipomatous tumor. After resection of the lesion, histology showed steatonecrosis, compatible with lobular panniculitis. Magnetic resonance imaging examination revealed the presence of a liquid substance in the gluteal region, favoring the diagnostic suspicion of factitious panniculitis. The patient admitted to having undergone silicone injection in this region in the past, with additional findings arising from the histological review confirming this hypothesis. The late complication linked to injections of cutaneous filling material motivated the present study.

Keywords: Erythema chronicum migrans; Panniculitis; Silicones

Scar formation is the natural healing response of the skin to reestablish dermal integrity after an injury. Besides being unsightly, the scars can also be hypertrophic or keloids, which makes treatment challenging and many times unsatisfactory. Ethnicity and site of the lesion have an important role in the formation of scar types, but it is not always possible to predict the final result. The use of topical silicone has been an option for scar management and the target of many publications over the years. It is believed that its early use can prevent the development of abnormal scars and treat existing scars.

Keywords: Scars, prevention & control; Silicone gels; Treatment

Introduction: Silicone dressings and Triamcinolone injections are known to improve keloids and hypertrophic scars size, erythema, flexibility, and symptoms such as pain and itching. These treatments are non-invasive, inexpensive, and widely used as first or second-line therapy; however, studies comparing them are still lacking.
Objective: To compare silicone dressings, triamcinolone injections, and a combination group, to treat hypertrophic scars, at the same anatomical area, caused by the same mechanism of injury.
Materials and methods: In a prospective study, 12 patients with median-sternotomy scars were randomized into 3 groups (n=4 patients each): group 1, monthly triamcinolone injections; group 2, a combination of silicone dressings and triamcinolone injections; and group 3, silicone dressings. Patients were evaluated in monthly clinical appointments using the Vancouver Scale and the durometer. Immunohistochemistry and confocal microscopy for collagen types I and VI were performed in scar samples. The groups were compared using Kruskal-Wallis and Friedman tests, with p<0,05 indicating significance.
Results: The three treatments were effective in reducing the Vancouver scores. A difference between the three groups was observed at time 2 when triamcinolone was less effective. Group 2 showed an improvement on pigmentation (p = 0,042). Collagens types I and VI presented increased fluorescence throughout the superficial and deep dermis in untreated lesions, which decreased after the treatment. Although the number of patients is limited, this is the first prospective study addressing some of the major bias in scars treatment.

Keywords: Scar; Keloid; Silicone gel; Triamcinolone

INTRODUCTION: Patients often request anti-aging treatments of the perioral and periorbital regions. Most of the time, it is necessary to use a combination of procedures, so the result meets the patient’s expectations.
OBJECTIVE: This is a prospective, single-center, and comparative study assessing the rejuvenation of the perioral and periorbital regions after treatment with medium depth chemical peel using phenol 88% with or without the previous application of botulinum toxin.
METHODS: Sixteen patients underwent regional peel with phenol 88%; eight received botulinum toxin application two weeks before. The assessment was conducted using standard photographs and evaluation scales by doctors and patients.
RESULTS: The overall evaluation by doctors and patients on the 45th day was considered excellent or good for all patients, with little advantage for combined treatment in the periorbital region.
CONCLUSION: Combining these two relatively low-cost procedures, often overlooked by dermatologists, resulted in a significant improvement in the changes related to aging in these areas.

Keywords: Botulinum toxins type A; Chemexfoliation; Phenol; Rejuvenation

A 76-year-old woman presented with facial edema and nodules in the front glabellar region and nasal dorsum that clinically resembled leonine facies. A facial ultrasound showed deposits of permanent facial filler with a "snowstorm" aspect characteristic of silicone oil, and an anatomopathological examination suggested a granulomatous reaction to the exogenous substance. Permanent fillers, such as silicone, behave like foreign bodies and cause a chronic granulomatous reaction. Although dermal fillers have been increasingly used, there is still no consensus on the management of their complications. In the present case, a good response to dapsone was observed.

Keywords: Silicones; Dermal Fillers; Granulomatous Disease, Chronic; Foreign-Body Reaction.

INTRODUCTION: Multiple treatments that promise to prevent or treat skin aging act on cellular functions, reducing skin aggression mechanisms, or even on the loss of skin barrier properties. Silicone adhesives appear to have a positive effect on barrier function and modulation of inflammation, but their clinical effects have not yet been documented.
OBJECTIVE: To evaluate the effectiveness of silicone adhesives in reducing the signs of periorbital aging.
METHODS: 33 patients between 35 and 55 years old with a clinical diagnosis of aging in the periorbital region were selected; Of these, 23 underwent hydration measurements (corneometry) and skin relief (prophylometry). All participants used the patches daily for a period of 30 days.
RESULTS: After four weeks of use, the application of silicone adhesives provided a significant improvement in hydration levels and the skins microrelief, making it smoother. The clinical and subjective evaluation corroborated these findings, and also showed a relevant improvement in clinical and subjective parameters such as hydration, softness, texture, and expression lines.
CONCLUSION: The continued use of silicone adhesives demonstrated a beneficial effect on some signs of aging, possibly related to improved hydration and modulation of inflammation.

Keywords: Skin Aging; Epidermis; Silicone Elastomers.