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BACKGROUND: Nonsurgical rhinoplasty (NSR) utilizing hyaluronic acid (HA) filler injections is increasingly used to address nose shape issues. While refinements have been proposed, the technique lacks standardization. OBJECTIVES: Our study aimed to evaluate the aesthetic outcome, longevity of results, safety, and patient satisfaction with the novel Rino-4-Puntos (R4P) NSR technique. METHODS: This is a retrospective study of consecutive individuals treated with R4P between January 2021 and July 2023. All participants had one of the four indications: rectification of the dorsum (21%), triangulation of the tip (32%), projection (25%), and strengthening of the columella (22%). Each patient received two hyaluronic acid (HA) fillers: one with intermediate G prime (G') at Points 1-3 and another with high G' at Point 4, which is further divided into Points 4.1, 4.2, 4.3, and 4.4. The injection points were as follows: P1 (radix, 0.05-0.15 mL, supraperiosteal), P2 (supratip, 0.025 mL, suprachondrial), P3 (tip, 0.15 mL, deep fat), P4 (columella, 0.30 mL, supraperiosteal [4.1], or deep fat [4.2, 4.3, and 4.4]). RESULTS: Four hundred individuals (n = 284 [71%] females) are included. The mean filler volume used was 0.65 ± 0.17 mL. Injecting small boluses (≤ 0.05 mL) in the midline at deep planes minimized the risk of adverse effects, as no vascular complications occurred. Ninety-three percent of participants considered the overall outcome at least satisfactory ("good," "very good," or "excellent"). The treatment effect was maintained for a median of 11 months. CONCLUSIONS: The R4P technique refines NSR by combining enhanced aesthetic outcome, longevity, and safety. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

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Introdução: O polimetilmetacrilato é um produto de preenchimento permanente. A injeção deste material na face pode levar a complicações. O objetivo deste estudo é determinar em uma série de casos o tempo mediano de ocorrência de complicações, as áreas mais comprometidas, os tipos de complicações e tratamentos mais realizados. Método: Foram estudados 209 casos de pacientes portadores de complicações relacionadas ao uso de polimetilmetacrilato na face que buscaram tratamento entre o período de janeiro de 2000 a junho de 2021. Os dados analisados foram sexo, idade, número de injeções, momento da aplicação, intervalo de tempo até surgir a complicação, tipo de complicação, região comprometida e tratamento realizado. Resultados: A idade média dos pacientes foi de 45 anos (23 a 79 anos). Destes, 172 eram mulheres e 37 homens. O número de aplicações variou de 1 a 5. O tempo mediano de surgimento de complicações foi de 71 meses. As regiões mais comprometidas foram a malar, em 102 pacientes; mandibular, em 100; e zigomática, em 91. Granuloma foi observado em 135 pacientes; edema, em 120; e inflamação, em 78. O tratamento mais realizado foi a injeção de corticoide, em 111 pacientes, seguido de remoção cirúrgica, em 40. Conclusão: Os resultados podem servir como base de conhecimento para uma melhor compreensão das complicações com o uso de polimetilmetacrilato na face.

Introduction: Polymethylmethacrylate is a permanent filler product. Injecting this material into the face can lead to complications. The objective of this study is to determine in a series of cases the median time for complications to occur, the most affected areas, the types of complications, and the treatments most performed. Method: 209 cases of patients with complications related to the use of polymethyl methacrylate on the face who sought treatment between the period of January 2000 and June 2021 were studied. The data analyzed were gender, age, number of injections, moment of application, interval time until the complication arises, type of complication, affected region, and treatment performed. Results: The average age of patients was 45 years (23 to 79 years). Of these, 172 were women and 37 men. The number of applications ranged from 1 to 5. The median time for complications to appear was 71 months. The most affected regions were the malar, in 102 patients; mandibular, in 100; and zygomatic, in 91. Granuloma was observed in 135 patients; edema, in 120; and inflammation, in 78. The most common treatment was corticosteroid injection, in 111 patients, followed by surgical removal, in 40. Conclusion: The results can serve as a knowledge base for a better understanding of complications with the use of polymethylmethacrylate in the face.

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BACKGROUND: Nonsurgical cosmetic procedures, particularly the use of hyaluronic acid (HA)-based soft tissue fillers, are becoming increasingly popular. This trend has catalyzed the development of a plethora of HA-based products differing in product characteristics, thereby catering to an ever-widening spectrum of aesthetic applications. However, complications rise concomitant with the increasing number of procedures. Among the strategies to manage such adverse events is the enzymatic breakdown with hyaluronidase. OBJECTIVE: To analyze the response of different HA-based soft tissue filler materials to hyaluronidase injections. METHODS: A total of 11 different HA-based soft tissue fillers were evaluated using noninvasive ultrasound imaging to assess their behavior in response to hyaluronidase injections. The HA-based soft tissue fillers were categorized according to their product characteristics into a structuring, volumizing, and lip volumizing group. Standardized injections of 0.2 cc were performed in chicken breast to simulate human tissue. Ultrasound measurements of width, height, and calculated volume were performed immediately after filler injection, 1 h and 24 h following hyaluronidase injection. RESULTS: Regardless of the soft tissue filler analyzed, the most significant volume reduction occurred within the first h after applying hyaluronidase, with a 64.1% decrease from the initial volume. After 24 h, the total volume reduction reached 81.7%. No statistically significant differences were found when comparing the three groups at each follow-up time period, except for the height measurement after 1 h. While width was statistically significant in all groups between the investigated follow-up groups, the volume reduction was only statistically significant in the groups with the highest and second highest G' values (i.e., Group 1-structuring, Group 2-volumizing). CONCLUSION: The effectiveness of hyaluronidase in dissolving HA-based fillers is initially independent of product characteristics of HA-based fillers such as G-prime, with increased efficacy in fillers with higher G-prime values, as evidenced by significant volume reductions in such groups.

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BACKGROUND: Complications of temporary and permanent fillers have been extensively studied. However, there is a lack of comparative data regarding poly-L-lactic acid (PLLA), calcium hydroxyapatite (CaHA), and polycaprolactone (PCL) known as collagen biostimulators. AIMS: This study addressed the complications of collagen biostimulators concerning their diagnosis, type of product, treatment, and monitoring. PATIENTS/METHODS: An electronic questionnaire was sent to Brazilian dermatologic ultrasound experts to identify complications related to biostimulators. The type of biostimulator, location of application, number of vials injected, application plan, time between injection treatment and complication, injector profile, treatment, and prognosis were assessed. RESULTS: Fifty-five cases were identified, of which 49.1% were caused by PLLA-Elleva®, 23.6% by CaHA (alone or combined with hyaluronic acid), 20.0% by PLLA-Sculptra®, and 7.3% by PCL. The most affected area was the face (72.7%), with nodules being the most common clinical form (89.1%), generally occurring late (60.0%) (>1 month). Only one case was injected at an incorrect depth (musculoaponeurotic system-SMAS). Despite several treatments, including saline (45.5%), hyaluronidase (25.5%), diluted corticosteroids (23.6%), and energy-based devices (10.9%), only five cases showed complete resolution. Hyaluronidase was beneficial in complications related to fillers when there was an association of calcium hydroxyapatite with hyaluronic acid (p < 0.01). CONCLUSIONS: Complications from collagen biostimulators were more common on the face, typically manifesting about 1 month after treatment. These issues seemed to be related more to the properties of the products rather than inadequate technique. Furthermore, hyaluronidase demonstrated efficacy only in cases where there was an association with HA.

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The development of injectable hydrogels with natural biopolymers such as gelatin (Ge) and hyaluronic acid (Ha) is widely performed due to their biocompatibility and biodegradability. The combination of both polymers crosslinked with N-Ethyl-N'-(3-dimethyl aminopropyl) carbodiimide hydrochloride (EDC) can be used as an innovative dermal filler that stimulates fibroblast activity and increases skin elasticity and tightness. Thus, crosslinked Ge/Ha hydrogels with different concentrations of EDC were administered subcutaneously to test their efficacy in young and old rats. At higher EDC concentrations, the viscosity decreases while the particle size of the hydrogels increases. At all concentrations of EDC, amino and carboxyl groups are present. The histological analysis shows an acute inflammatory response, which disappears seven days after application. At one and three months post-treatment, no remains of the hydrogels are found, and the number of fibroblasts increases in all groups in comparison with the control. In addition, the elastic modulus of the skin increases after three months of treatment. Because EDC-crosslinked Ge/Ha hydrogels are biocompatible and induce increased skin tension, fibroblast proliferation, and de novo extracellular matrix production, we propose their use as a treatment to attenuate wrinkles and expression lines.

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Introdução: O mercado de procedimento estéticos cresce exponencialmente no Brasil. Tal crescimento tem despertado o interesse de várias categorias profissionais. A decisão de praticar no setor deve considerar as oportunidades de mercado da localidade na qual se pretende atuar. Entretanto, a área carece de análises comparativas documentando prováveis diferenças regionais no país. O objetivo do estudo é descrever as diferenças de mercado em procedimentos estéticos entre os estados e regiões brasileiras. Um índice de potencial consumo de cosmiatria (IPCC) é calculado para tal análise comparativa. Método: Estudo transversal envolvendo prestadores de procedimentos estéticos não cirúrgicos no Brasil. Buscas no Google®-Google Maps® foram conduzidas usando termoschave e entrevistas telefônicas realizadas para obter informações sobre categorias profissionais, tipo de provedores e serviços oferecidos. Valores preditivos positivos foram obtidos para todas as estratégias de busca e usados para estimar o número total de provedores. O tamanho da população e a renda per capita foram considerados para o cálculo dos IPCCs para os estados brasileiros. Resultados: São Paulo, Minas Gerais e Rio de Janeiro apresentaram os maiores IPCCs, sendo 524, 210 e 180, respectivamente. Roraima teve um IPCC de 14, o mais baixo do país. A Região Sudeste apresentou, em média, o maior IPCC (242) entre todas as regiões brasileiras. Conclusão: Considerando o tamanho da população e a renda, a Região Sudeste apresenta as maiores oportunidades de mercado em procedimentos estéticos não cirúrgicos no Brasil. Nossos achados podem ser de interesse para profissionais de saúde e investidores que atuam ou pretendem atuar no setor.

Introduction: The aesthetic procedure market is growing exponentially in Brazil. This growth has aroused the interest of several professional categories. The decision to practice in the sector must consider the market opportunities in the location in which you intend to operate. However, the area lacks comparative analyses documenting probable regional differences in the country. The objective of the study is to describe market differences in aesthetic procedures between Brazilian states and regions. An index of potential cosmetic consumption (IPCC) is calculated for such a comparative analysis. Method: Cross-sectional study involving providers of nonsurgical aesthetic procedures in Brazil. Searches on Google Maps® were conducted using key terms, and telephone interviews were conducted to obtain information on professional categories, types of providers, and services offered. Positive predictive values were obtained for all search strategies and used to estimate the total number of providers. Population size and per capita income were considered to calculate the IPCCs for Brazilian states. Results: São Paulo, Minas Gerais, and Rio de Janeiro presented the highest IPCCs, being 524, 210, and 180, respectively. Roraima had an IPCC of 14, the lowest in the country. The Southeast Region presented, on average, the highest IPCC (242) among all Brazilian regions. Conclusion: Considering population size and income, the Southeast Region presents the greatest market opportunities for nonsurgical aesthetic procedures in Brazil. Our findings may be of interest to healthcare professionals and investors who work or intend to work in the sector.

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En este reporte presentamos tres pacientes en quienes ocurrieron condiciones inflamatorias perianales tardías, luego de la administración de sustancias modeladoras no identificadas en los glúteos. El diagnóstico inicial y supuesto no fue correcto, ya que no se investigó durante la evaluación preliminar el antecedente de la administración de elementos modeladores. Recomendamos que los pacientes con patologías inflamatorias del ano, sobre todo aquellos cuyo curso es extraño, se les pregunte acerca de la administración de agentes modeladores en los glúteos. Esta práctica puede contribuir a la eficacia del diagnóstico de manifestaciones perianales caracterizadas por flogosis, que se presentan de forma inusual. (AU)

In this report we present three patients in which late perianal inflammatory conditions occurred after administration of unidentified modeling agents to the buttocks. The initial diagnosis was not correct because of the administration of modeling agents was not investigated during the initial eval-uation. We recommend inquiring patients with inflammatory pathologies of the anus, especially those whose course is unusual, about the adminis-tration of modeling agents to the buttocks. This approach can contribute to the efficiency of the diagnosis of perianal complaints characterized by inflammation, but rare in its appearance. (AU)

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PURPOSE: The study aimed to evaluate and compare the efficacy and safety of treating atrophied labia majora with hyaluronic acid (HA) and calcium hydroxyapatite (CaHA). METHODS: Ten participants complaining of sagging or loss of volume in the labia majora were evaluated and randomly assigned to two groups-treated with CaHA or AH. Photographic documentation was taken and appreciated by the participants and by blind observers. RESULTS: The study showed an improvement in labia majora regarding volumization and flaccidity that was more significant after 90 days of treatment in both treatments. Besides flaccidity, volume replacement resulted in better balance and proportion between the labia majora and labia minora. The evaluators, independent and blind, judged that in 80% of the cases of the HA group and in 50% of cases of the CaHA group, there was an excellent improvement. CONCLUSION: CaHA and HA are both effective and safe for treating the intimate region, and this study cannot prove the superiority of one over the other. An appropriate assessment involving the analysis of sagging and/or volume loss and the creation of a sequential treatment protocol, involving CaHA and HA, seems to be the best solution. LEVEL OF EVIDENCE I: Evidence obtained from at least one properly designed randomized controlled trial. This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

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O uso de materiais injetáveis estéticos na região orofacial vem aumentando exponencialmente, assim como as complicações associadas a estes procedimentos. As reações adversas a materiais estéticos podem se confundir com processos neoplásicos, tanto do ponto de vista clínico quanto microscópico. Este trabalho tem como objetivo principal descrever detalhadamente as características clínicas, demográficas, histopatológicas, histoquímicas e imuno-histoquímicas de reações adversas a diferentes preenchedores estéticos na região oral e maxilofacial. Foi realizado um estudo transversal multicêntrico, no qual as amostras foram coletadas de cinco laboratórios de patologia oral no Brasil e no México. Foram realizadas colorações de hematoxilina-eosina, Alcian blue, Sirius red e azul de toluidina, bem como imuno-histoquímica para CD68, CD3 e CD20. H&E também foi avaliado sob luz polarizada. Estatísticas descritivas foram realizadas. Vinte e três casos foram incluídos. Polimetilmetacrilato foi o material mais comum (n=10), seguido por silicone (n=4), ácido hialurônico (n=3), hidroxiapatita de cálcio (n=3), hidrogel de poliacrilamida (n=2) e ácido poli-L-láctico (n=1). Os pacientes foram principalmente mulheres (91,3%), com idade média de 50,65 anos. A maioria das reações afetou os lábios e foi assintomática, com tempo de evolução variável (7 dias a 10 anos), apresentando-se como nódulos de 58,07 mm em média. Polimetilmetacrilato e silicone apresentaram imagens negativas de formato arredondado, enquanto ácido hialurônico e hidrogel de poliacrilamida apresentaram-se como "piscinas" amorfas. A hidroxiapatita de cálcio apresentou estruturas poliédricas e o ácido poli-L-láctico apresentou formatos semelhantes a fendas. Ambos birrefringentes sob luz polarizada. Células gigantes foram comumente encontradas, exceto em silicone e ácido hialurônico. Granuloma de corpo estranho foi frequente em polimetilmetacrilato. Ácido hialurônico e hidrogel de poliacrilamida apresentaram metacromasia por azul de toluidina. Alcian blue foi positivo em todos os casos de ácido hialurônico. Mastócitos foram detectados em todos os materiais, exceto ácido hialurônico e hidrogel de poliacrilamida. Eosinófilos foram mais raros que mastócitos. Numerosas células CD68 positivas foram vistas em todos os casos. Todos os casos apresentaram células CD3 positivas, com quantidades variáveis. CD20 foi escasso ou negativo na maioria dos casos. Além do artigo científico, foi produzido um e-book de histopatologia, enfatizando o diagnóstico diferencial histológico destas lesões. Concluímos que apesar das semelhanças, há características específicas de cada material e da resposta do hospedeiro que auxiliam no diagnóstico histopatológico correto. Formato, tamanho e coloração do material no H&E são características-chave no diagnóstico diferencial. Uma reação intensa de macrófagos é observada em todos os preenchedores estéticos, frequentemente associada à formação de células gigantes. A imuno-histoquímica para CD68 e a coloração por azul de toluidina são as mais abrangentes para auxiliar no correto diagnóstico, sendo que outros marcadores podem ser úteis em casos específicos. Lesões neoplásicas também devem ser consideradas no diagnóstico diferencial histopatológico.

The use of aesthetic injectable materials in the orofacial region has been increasing exponentially, which has also led to an increase in complications associated with these procedures. Adverse reactions to aesthetic materials can be confused with neoplastic processes, both from a clinical and microscopic perspective. The main objective of this study is to describe in detail the clinical, demographic, histopathological, histochemical, and immunohistochemical characteristics of adverse reactions to different aesthetic fillers in the oral and maxillofacial region. A multicenter cross-sectional study was conducted, in which samples were collected from five oral pathology laboratories in Brazil and Mexico. Hematoxylin-eosin, Alcian blue, Sirius red, and toluidine blue staining, as well as immunohistochemistry for CD68, CD3, and CD20, were performed. H&E was also evaluated under polarized light. Descriptive statistics were conducted. Twenty-three cases were included. Polymethylmethacrylate was the most common material (n=10), followed by silicone (n=4), hyaluronic acid (n=3), calcium hydroxyapatite (n=3), polyacrylamide hydrogel (n=2), and poly-L-lactic acid (n=1). The patients were predominantly women (91.3%), with an average age of 50.65 years. Most reactions affected the lips and were asymptomatic, with variable evolution times (7 days to 10 years), presenting as nodules with an average size of 58.07 mm. Polymethylmethacrylate and silicone showed negative images with a rounded shape, while hyaluronic acid and polyacrylamide hydrogel presented as amorphous "pools." Calcium hydroxyapatite showed polyhedral structures, and poly-L-lactic acid exhibited fissure-like shapes. Both were birefringent under polarized light. Giant cells were commonly found, except in silicone and hyaluronic acid. Foreign body granuloma was frequent in polymethylmethacrylate. Hyaluronic acid and polyacrylamide hydrogel showed metachromasia with toluidine blue. Alcian blue was positive in all hyaluronic acid cases. Mast cells were detected in all materials except hyaluronic acid and polyacrylamide hydrogel. Eosinophils were rarer than mast cells. Numerous CD68- positive cells were seen in all cases. All cases presented CD3-positive cells, in varying amounts. CD20 was scarce or negative in most cases. In addition to the scientific article, a histopathology e-book was produced, emphasizing the histological differential diagnosis of these lesions. We conclude that despite similarities, there are specific characteristics of each material and host response that aid in the correct histopathological diagnosis. The shape, size, and staining of the material in H&E are key features in the differential diagnosis. An intense macrophage reaction is observed in all aesthetic fillers, often associated with the formation of giant cells. Immunohistochemistry for CD68 and toluidine blue staining are the most comprehensive for assisting in the correct diagnosis, although other markers may be useful in specific cases. Neoplastic lesions should also be considered in the histopathological differential diagnosis.

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ABSTRACT Purpose: Recently, hyaluronic acid (HA) was proposed as a promising option for the treatment of acquired lower eyelid cicatricial ectropion. However, this effect was not confirmed by quantitative assessments. This study aimed to assess the effect of hyaluronic acid on the treatment of acquired lower eyelid cicatricial ectropion. Methods: Eight patients with acquired lower eyelid cicatricial ectropion (13 eyelids) were treated with a single 1 mL injection of hyaluronic acid in the preseptal area of the lower eyelid. Evaluation of symptoms and biomicroscopic exam was performed before and 30 days after hyaluronic acid injection. Quantitative analysis of the lower eyelid position (with and without lid traction) was determined before and 30 days after hyaluronic acid injection through standard photographs analyzed using the ImageJ. Results: All patients experienced partial improvement of symptoms. The lower eyelid position was significantly lifted after hyaluronic acid injection with a significant reduction of medial and lateral angles, reduction of the margin reflex distance, and total and medial ocular fissure area. However, signs of lid margin inflammation and corneal punctate keratitis persisted. Conclusions: Hyaluronic acid injected in the pre-septal area of the lower eyelid improved acquired lower eyelid cicatricial ectropion symptoms and significantly lifted the position of the lower eyelid. Further studies, with a large number of participants and a long-term follow-up period, are needed to better determine the permanency of the effects of hyaluronic acid injections on the treatment of acquired lower eyelid cicatricial ectropion.

RESUMO Objetivo: Recentemente, o ácido hialurônico foi proposto como promissor no tratamento do ectrópio cicatricial adquirido da pálpebra inferior. No entanto, não foram feitas avaliações quantitativas para confirmar este efeito, motivo que levou a realização do presente estudo que visou avaliar o efeito do ácido hialurônico no tratamento do ectrópio cicatricial adquirido da pálpebra inferior. Métodos: Oito portadores de ectrópio cicatricial adquirido da pálpebra inferior (13 pálpebras) foram tratados com uma única dose de 1 mL de ácido hialurônico, injetada na área pré-septal da pálpebra inferior. Os sintomas e o exame biomicroscópico foram realizados antes e 30 dias após a injeção do ácido hialurônico. A análise quantitativa da posição palpebral inferior (com e sem tração palpebral) foi determinada antes e 30 dias após a injeção do ácido hialurônico por meio de fotografias que foram analisadas usando o programa ImageJ. Resultados: Todos os pacientes apresentaram melhora parcial dos sintomas. A posição da pálpebra inferior foi elevada significativamente após a injeção do ácido hialurônico, com redução significativa dos ângulos medial e lateral, da distância entre o reflexo pupilar e a margem da pálpebra inferior, da área de fissura palpebral total e da área medial. No entanto, sinais de inflamação da margem palpebral e ceratite puntata da córnea persistiram. Conclusões: O ácido hialurônico injetado na área pré-septal da pálpebra inferior, melhorou os sintomas do ectrópio cicatricial adquirido da pálpebra inferior e elevou significativamente a posição da pálpebra inferior. Estudos com maior número de participantes e período de acompanhamento mais longo são necessários para melhor determinar os efeitos das injeções de ácido hialurônico a longo prazo no tratamento do ectrópio cicatricial adquirido da pálpebra inferior.

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Background: Aesthetic treatment directed at improving facial emotional messages and social attributes may maximize patient satisfaction with treatment results. The MD Codes™ is an approach to facial aesthetic treatment that accounts for emotional messages and social attributes while minimizing variability in patient assessment, injection technique, injection sites, and treatment outcomes. Objective: To assess the impact of the MD Codes systematic treatment approach on emotional and social attributes and natural appearance after facial aesthetic treatment with hyaluronic acid (HA) fillers. Methods: A retrospective analysis was performed in patients treated with 12 mL of HA fillers (Juvéderm® Vycross™ products) per patient using the MD Codes. Study injectors, experienced clinician observers, clinical staff, laypeople, and patients evaluated impact of treatment on emotional and social attributes and natural appearance based on pre- and post-treatment photographs of patients. Results: Twelve patients and 49 external observers, from 12 countries, evaluated the images. More than 90% of patients named "eye bags" as the facial area most in need of aesthetic treatment; >55% of external observers identified "cheeks." The top 3 facial emotional attributes noted by all evaluators after treatment were, in order, "less tired", "less saggy", and "younger." All patients reported a visible and positive change in emotional attributes except for "less sad." After 9 months, most patients reported looking "less tired" (n=11/12), "less saggy" (n=8/12), and "less sad" (n=6/12). At months 6 and 9, all patients rated their appearance as natural looking. At least 90% of external observers considered the frontal view results natural for all but 1 patient. Patients reported improved positive social attributes (eg, "looking friendlier") and improvements in well-being after treatment. No serious side effects were reported. Conclusion: Implementing the MD Codes for facial aesthetic treatment may improve facial emotional attributes as well as enhance social attributes and well-being, with natural-looking results.

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Facial filling is widespread in society, albeit associated with inherent risks. This review analyzes clinical studies using laser therapy for filler complications to assess its safety and efficacy as an alternative treatment. A literature search was conducted up until April 2023, encompassing five different databases: PubMed, Scopus, Embase, Web of Science, and Medline, to find clinical trials addressing patients who underwent laser treatment for adverse reactions to injectable facial filling. The outcome variables were the clinical assessment of the lesion and the occurrence of post-intervention complications/sequelae. The risk of bias was assessed using the ROBINS-I tool. In total, six studies were included, all classified as having a "moderate risk" of bias. A total of 533 patients underwent laser treatment for adverse reactions to injectable facial fillers. The diode laser was the most frequently utilized equipment, with positive results reported in five studies. Among all treated patients, 96.24% achieved partial or complete resolution, 0.22% experienced some sequelae or complications, and only 0.01% showed no improvement. Laser treatment can eliminate the necessity for surgical intervention for adverse reactions to injectable facial fillers, resulting in partial or complete improvement of the condition.

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Introdução: Tradicionalmente, o rebaixamento do dorso é o único método de correção da giba. Raras séries apontam a elevação do radix como possível solução. O que explica essa maciça predominância do procedimento redutor? Ineficácia dos métodos de aumento de radix e ponta? Percepção de nariz grande com os procedimentos de aumento? Nossos objetivos são descobrir se a percepção de redução ocorre na rinoplastia não cirúrgica (RNC), feita exclusivamente com adição de volume, e se a percepção de redução é importante na RNC. Método: Análise retrospectiva de 116 pacientes consecutivos submetidos a RNC. As imagens dos pacientes foram analisadas por 12 observadores independentes que avaliaram as mudanças percebidas no tamanho do nariz e a qualidade da correção, dando notas de 1 a 10 para os dois quesitos. Quanto ao tamanho, 1 representava muito menor que antes, 5 mesmo tamanho (neutralidade) e 10 muito maior que antes. A qualidade da correção foi classificada de 1 a 10. Resultados: 92 casos (79%) foram percebidos como redução do tamanho, enquanto 20 casos (17%) foram percebidos como aumento. Houve percepção de redução na média das pontuações de tamanho (4,71). A média da qualidade da correção foi de 8,28 na escala de 1 a 10. Ademais, nossos resultados sugerem que pode haver correlação indireta entre a percepção do tamanho e a qualidade da correção. Conclusão: O aumento proporcionado pela RNC pode causar percepção de redução do tamanho do nariz, e o grau da redução percebida pode estar diretamente relacionado ao grau de qualidade percebida da correção.

Introduction: Traditionally, lowering the dorsum is the only method of hump correction. Rare series point to raising the radix as a possible solution. What explains this massive predominance of the reduction procedure? Ineffectiveness of radix and tip augmentation methods? Big nose perception with augmentation procedures? Our objectives are to determine if the perception of reduction occurs in non-surgical rhinoplasty (NSR), performed exclusively with volume addition, and if the perception of reduction is important in NSR. Method: Retrospective analysis of 116 consecutive patients undergoing NSR. The patients' images were analyzed by 12 independent observers who evaluated the perceived changes in the nose's size and the correction's quality, giving scores from 1 to 10 for both questions. As for size, 1 represented much smaller than before, 5 same size (neutrality), and 10 much larger than before. The quality of correction was graded from 1 to 10. Results: 92 cases (79%) were considered size reduction, while 20 cases (17%) were considered enlargement. There was a perception of a reduction in the average size scores (4.71). The mean correction quality was 8.28 on a scale of 1 to 10. Furthermore, our results suggest that there may be an indirect correlation between perceived size and correction quality. Conclusion: The increase provided by the NSR can cause a perception of a reduction in the size of the nose, and the degree of perceived reduction can be directly related to the degree of perceived quality of the correction.

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Surgical facelifts and noninvasive techniques such as mesotherapy, hyaluronic fillers and botulinum toxin, among other procedures are widely used nowadays to reverse skin ageing and achieve rejuvenation effects. Secondary alopecia due to cosmetic procedures is a rare side effect and is poorly described in the literature. The mechanisms in which hair loss develops after an aesthetical procedure or surgical technique are not well known. The development of secondary scarring alopecia or non-scarring alopecia depends upon the interaction between different external factors, the individual host response and the extent of damage to the hair follicle anatomy. Current knowledge hints at the type of substance used, pressure to hair structures and vasculature due to the materials used, previously unknown or unaware hair disorder, and poor surgical techniques to be the main factors contributing to the development of secondary alopecia. Physicians and patients must be aware of all the substances used for the procedures and be attentive to any change in hair density or hair loss. Clinicians must have a low threshold to take biopsies if the risk of scarring alopecia may occur. Herein, we review the clinical, trichoscopic, histopathological findings and potential pathophysiological mechanisms of hair loss due to different aesthetic procedures.

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Introduction: Anatomy is one of the foundations in medicine, and choosing a practical and dynamic teaching method is essential for better retention of your learning. The objective is to use facial anatomy applied to live models as an innovative teaching strategy and to evaluate the experience of the learning experience of students assigned to the method. Method: The work analyzes the experience with body painting of 51 students from Instituto Boggio assigned this method (or instructed to use this method) during their classes. Different planes and anatomical structures were represented on live models' faces to simulate and teach the main injectable cosmetic procedures; syringes, needles, cannulas, and ultrasound gel stained with food inks were used. Overlapping latex layers were used for the anatomical study of the temple, middle third of the face, and nose, allowing the reproduction of fillers and biostimulators in these regions. The main muscle groups were represented for the discussion of high-precision botulinum toxin. After the entire demonstration, the students answered a questionnaire via "Google Forms" evaluating the methodology used. Results: According to the answers to the questionnaires, most students considered body painting an innovative methodology that contributed to learning anatomical content and satisfactorily illustrating the demonstrated cosmetic procedures. Conclusion: Practical learning through live models makes this new teaching method something innovative and unique that, in an enjoyable way, enables the study of anatomy and appropriately trains clinical skills.

Introdução: A anatomia é um dos principais alicerces no exercício da medicina e a escolha de um método de ensino prático e dinâmico é fundamental para melhor retenção do seu aprendizado. O objetivo é utilizar a anatomia facial aplicada em modelos vivos como estratégia inovadora de ensino e avaliar a experiência do processo de aprendizagem dos alunos submetidos ao método. Método: O trabalho analisa a experiência vivida com a pintura corporal por 51 alunos do Instituto Boggio submetidos ao método durante as aulas ministradas. Diferentes planos e estruturas anatômicas foram representados nas faces de modelos vivos. Para simulação e ensino dos principais procedimentos cosmiátricos injetáveis, seringas, agulhas, cânulas e gel de ultrassom corado com tintas alimentícias foram utilizados. Camadas de látex sobrepostas foram utilizadas para estudo anatômico da têmpora, terço médio da face e nariz, possibilitando a reprodução do uso de preenchedores e bioestimuladores nestas regiões. Os principais grupamentos musculares foram representados para discussão sobre toxina botulínica de alta precisão. Após toda a demonstração, os alunos responderam a um questionário via "Formulários Google" avaliando a metodologia utilizada. Resultados: De acordo com as respostas dos questionários, a maioria dos alunos considerou a pintura corporal como uma metodologia inovadora e que contribui no aprendizado do conteúdo anatômico, bem como ilustra satisfatoriamente os procedimentos cosmiátricos demonstrados. Conclusão: A aprendizagem prática por meio dos modelos vivos faz deste novo método de ensino algo inovador e único que, de maneira lúdica, possibilita o estudo da anatomia e o treinamento de habilidades clínicas adequadamente.

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BACKGROUND: Dermal facial fillers are increasingly popular. Published reports on the clinical and histopathologic characteristics related to adverse reactions to dermal fillers in the facial region have been relatively well documented. This study adds to the literature on adverse reactions to injected filler in the oral and maxillofacial region in a South American population. METHODS: A retrospective, descriptive cross-sectional study (2019-2020) was performed. The study population was a dermatology service in Venezuela. Clinical and histopathologic features of patients with adverse effects were documented. RESULTS: A total of 35 cases of adverse reactions associated with cosmetic filler procedures were diagnosed during the analyzed period; of these, six cases (17.1%) involved the oral and maxillofacial region. All cases occurred in women. The mean age at diagnosis was 59.3 years (58-73). In three cases, dermal fillers were used in different locations on the face, while three involved the lips. Five patients exhibited adverse reactions to lip filler. All six cases were histopathologically diagnosed as foreign body reactions to injected material. Four and two cases revealed microscopic features compatible with hyaluronic acid and polymethylmethacrylate, respectively. CONCLUSION: Reflecting the dramatic increase in cosmetic procedures with soft tissue fillers, this study contributed by reporting six cases of foreign body reaction involving the oral and maxillofacial region, confirmed with biopsy and histopathology.

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OBJECTIVES: To assess the ultrasonographic patterns of different calcium hydroxyapatite (CaHA) formulations, including the undiluted, diluted, and mixed with hyaluronic acid (HA) compounds. METHODS: To review the ultrasonographic images of patients ≥18 years with confirmed injections of CaHA clinically and ultrasonographically, and without different concomitant types of fillers in the same region or other systemic or localized cutaneous diseases. RESULTS: Twenty-one patients met the criteria (90% female; 10% male; mean age: 52 years ± 12.8). Of these, 33.3% have been injected with an undiluted formulation, 33.3% with diluted, and 33.3% with a mixed formulation. All cases were studied with devices presenting frequencies that ranged from 18 to 24 MHz. Twelve cases (57%) were also studied with the 70 MHz. The ultrasonographic patterns of CaHA presented differences in the presence and intensity of PAS and the degree of inflammation according to the dilution and mix with HA. Diluted formulations show a milder intensity posterior acoustic shadowing (PAS) artifact than undiluted at 18-24 MHz. In mixed formulations, 57% showed mild PAS, and 43% demonstrated no PAS artifact at 18-24 MHz, besides fewer inflammatory changes in the periphery of the deposits. CONCLUSIONS: The ultrasonographic patterns of CaHA show differences in the presence and intensity of PAS and the degree of inflammation according to the dilution and mix with HA. Awareness of these ultrasonographic variations can support better discrimination of CaHA.

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The aim of this study was to systematically review the clinicopathological data regarding foreign body reactions (FBR) related to esthetic procedures in the orofacial region. Electronic searches were performed in six databases and in gray literature using PEO acronym for the review question. Case series and case reports describing FBR related to esthetic procedures in the orofacial region were included. The JBI Critical Appraisal Checklist-University of Adelaide tool was used for measuring the risk of bias. Eighty-six studies reporting 139 cases of FBR were identified. The mean age at diagnosis was 54.12 years (14-85 years), with most of the cases reported in America, North America (n = 42/30.70%) and Latin America (n = 33/23.60%), mainly occurring in women (n = 131/94.40%). Asymptomatic (n = 60/43.40%) nodules (n = 71/50.60%) were the main clinical characteristics. The lower lip represented the most affected anatomical location (n = 28/22.20%), followed by the upper lip (n = 27/21.60%). Surgical removal was the treatment of choice (n = 53/35.70%). Twelve different dermal fillers were reported in the study, and the microscopic characteristics of the cases varied according to the material used. The results based on case series and case reports showed that nodule and swelling were the main clinical characteristics of FBR related to orofacial esthetic fillers. The histological characteristics depended on the type of the filler material used.

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BACKGROUND: Hyaluronic acid (HA) filler application is one of the most frequent minimally invasive aesthetic procedures used worldwide. Its properties and characterization, performance, effects in other tissues, and response to complication treatments have been studied in several animal models. This review aims to categorize animal models considering the advantages and disadvantages regarding the purpose of the study. METHODS: Literature research was made using MEDLINE via PubMed by two reviewers using keywords "hyaluronic acid" "filler" and "animal model". Full-text articles published in English and with an in vivo animal model were included for data extraction. RESULTS: The rat model was the most common animal used to evaluate properties or characteristics and degradation of HA fillers. Rabbits were preferred for evaluating HA embolism treatments; however, anatomical names of the arteries differ in some studies. Mice and rats used as vascular occlusion model are challenging due to the size of the vessels and viscosity of the filler. CONCLUSION: There is a wide variability of options of in vivo animal models to evaluate HA fillers. The animal characteristics, laboratory resources, and HA properties should be considered in accordance with the objective of the study, when choosing the ideal model. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

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What points to consider when selecting a device for practicing dermatologic ultrasound is an excellent question. After we met the requisites published in the guidelines for practicing dermatologic ultrasound, it is necessary to consider the main objective of the use because it is not the same to be focused mostly on the avoidance of the puncture of important facial vessels such as the case of injectors of cosmetic fillers in comparison to the use of operators that need to deal with the diagnosis and monitoring of a wide range of dermatologic pathologies. Currently, a broad variety of ultrasound devices meets the minimum requirements for practicing these examinations in the market. Thus, small, portable, and high-end devices may present advantages and limitations that must be balanced according to the primary purposes and the budget. Moreover, the shape and footprint of the probes can make difficult or facilitate a dermatologic procedure. Other points to consider are the type of storage and the need for technical service. In summary, there are key points that we need to consider when we select a dermatologic ultrasound device in dermatology or aesthetics.

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