Summary:Rapid prototyping models (RPMs) had been extensively used in craniofacial and maxillofacial surgery, especially in areas such as orthognathic surgery, posttraumatic or oncological reconstructions, and implantology. Economic limitations are higher in developing countries such as Mexico, where resources dedicated to health care are limited, therefore limiting the use of RPM to few selected centers. This article aims to determine the dimensional error of a low-cost fused deposition modeling 3D printer (Tronxy P802MA, Shenzhen, Tronxy Technology Co), with Open source software. An ordinary dry human mandible was scanned with a computed tomography device. The data were processed with open software to build a rapid prototype with a fused deposition machine. Linear measurements were performed to find the mean absolute and relative difference. The mean absolute and relative difference was 0.65 mm and 1.96%, respectively (P = 0.96). Low-cost FDM machines and Open Source Software are excellent options to manufacture RPM, with the benefit of low cost and a similar relative error than other more expensive technologies.

Objective Since COVID-19 emerged, it has significantly affected medical education. Surgical training has been blocked and the learning curve flattened. However, COVID-19 led to the outbreak of multitudinous online courses. Master series: microsurgery for residents (MSMR) has been the most extensive and accessible online nonfee course transmitted so far regarding reconstructive microsurgery. The primary aim of this study was to assess the impact of the MSMR in the surgical community as an international educational tool during pandemic confinement. Patients and Methods A retrospective, observational, analytic, and transversal study was designed. An 11-item survey was sent to all the 1,513 attendees who completed at least 60% of course attendance during 2 days. Descriptive and analytic statistics were performed. The impact was measured by considering answers to questions 6 to 9 and 11 (course usefulness, microsurgery interest increase, desire to pursue a microsurgical career, attendance to in-person conferences, and overall score, respectively). Results A total of 1,111 (73.4%) of eligible subjects were included. In total, 55.8% were plastic surgery residents. After the course, 98.9% would pursue a career in reconstructive microsurgery, and 45% would stop attending in-person conferences. The overall score of the event was 9.06 ± 0.9 (from 0 to 10) regardless of the current training status. Conclusion The MSMR was a high impact course and has established a paradigm shift that will lead to an evolution in plastic surgery learning.

Background Liposculpture procedures have gained popularity over the last two decades with the evolution of surgeons’ skills and technological advancement. According to the 2018 ASAPS report, liposuction is the second most popular aesthetic procedure in the United States. Objectives This study aims to demonstrate that a spectrum of liposculpture definitions can be achieved using power-assisted liposuction (PAL). Also, to describe the satisfaction and complication rates in mild, moderate, and high definition groups using the PAL technology. Methods We designed a single-center retrospective study, including male patients who underwent PAL – liposculpture of the chest, abdomen, back and arms. Inclusion criteria were: Male patients above 18 years of age, body mass index (BMI) under 30 kg/m2. Measured outcomes included: Extent of definition, complication rates and levels of satisfaction. Results 50 male patients were included in this study between January 2018 and November 2019. The average age was 37.34 years (range 25-56). The average BMI was 26.4 kg/m2 (range 24-30). 54.3% of patients opted for high definition (HD), while 36.4% for moderate definition (MoD) and 9.2% for mild definition (MiD). There were no major complications. HD subgroup registered the highest incidence of minor complications (21%). Patients satisfaction levels were high in all of the three subgroups, with the highest scores in the HD subgroup (9.3/10). Conclusions A spectrum of definitions can be safely achieved using the PAL technology, with high patients satisfaction in mild, moderate, and high definition liposculpture subgroups and low complication rates.

ResumenAntecedentes: Las heridas por mordedura de perro constituyen un problema de salud pública creciente que involucra a todos los niveles de atención. Pueden variar en gravedad, desde heridas superficiales (piel y tejido subcutáneo) hasta desvitalización y pérdida de tejidos, con presencia de infecciones, complicaciones y secuelas estéticas y funcionales que requieren tratamiento especializado. Objetivo: Describir la experiencia de 7 años en el manejo de heridas por mordedura de perro y proponer un algoritmo de manejo en un centro de referencia en cirugía plástica y reconstructiva en México. Método: Se realizó un estudio retrospectivo en el que se incluyeron todos los registros de pacientes con heridas por mordedura de perro entre julio de 2010 y agosto de 2017. Las variables recabadas fueron edad, sexo, localización anatómica, características de la herida y manejo terapéutico. Resultados: Se obtuvo un total de 416 pacientes. El 63% de las lesiones ocurrieron en menores de 18 años. La mayoría de las heridas (88.2%) fueron aisladas en una región anatómica. La localización más frecuente fue la cara (61.3%). De todos los casos, el 74.3% se resolvieron solo con cierre primario, el 21.4% requirió además algún proceso reconstructivo, el 2.9% no requirió cierre y el 1.4% de los pacientes fueron hospitalizados. Todos los pacientes recibieron antibióticos profilácticos. El 2% reportaron infección posterior al manejo con cierre primario. Conclusiones: El correcto abordaje de las heridas por mordedura de perro en todos los niveles de atención mejora el pronóstico de los pacientes. Las heridas complejas deben ser manejadas inmediatamente en un centro de segundo o tercer nivel con cirugía plástica y reconstructiva. La mayoría de las heridas por mordedura de perro pueden ser reparadas con cierre primario y otras técnicas reconstructivas con seguridad.

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