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RESUMEN: Introducción: La utilización de instrumental piezoeléctrico en cirugía ortognática ha ido en aumento con el fin de minimizar el riesgo de daño a tejidos blandos en comparación al uso de sierra convencional. Sin embargo, aún existe incertidumbre respecto a las complicaciones asociadas a cada instrumental. Métodos: Realizamos una búsqueda en Epistemonikos, la mayor base de datos de revisiones sistemáticas en salud, la cual es mantenida mediante el cribado de múltiples fuentes de información, incluyendo MEDLINE, EMBASE, Cochrane, entre otras. Extrajimos los datos desde las revisiones identificadas, analizamos los datos de los estudios primarios, realizamos un meta análisis y preparamos una tabla de resumen de los resultados utilizando el método GRADE. Resultados y conclusiones: Identificamos cuatro revisiones sistemáticas que en conjunto incluyeron 10 estudios primarios, de los cuales, cuatro corresponden a ensayos aleatorizados. Concluimos que el uso de instrumental piezoeléctrico en comparación con la sierra convencional podría disminuir el riesgo de daño nervioso grave y disminuir el sangrado grave (>500 mL), pero la certeza de la evidencia es baja. Por otra parte, el uso de instrumental piezoeléctrico podría presentar poca o nula diferencia en el dolor postoperatorio, pero la certeza de la evidencia es baja. Finalmente no es posible establecer con claridad si el uso de instrumental piezoeléctrico disminuye la pérdida de sangre intraoperatoria (variable continua), la inflamación postoperatoria o el tiempo operatorio, ya que la certeza de la evidencia existente ha sido evaluada como muy baja.

ABSTRACT: Introduction: The use of piezoelectric bone surgery in orthognathic surgery has been increasing to minimize the risk of soft tissue damage compared to conventional saws. However, there is still uncertainty regarding the complications associated with each instrument. Methods: We searched in Epistemonikos, the largest database of systematic reviews in health, which is maintained by screening multiple information sources, including MEDLINE, EMBASE, Cochrane, among others. We extracted data from the systematic reviews, reanalyzed primary studies' data, conducted a meta-analysis and generated a summary of findings table using the GRADE approach. Results and conclusions: We identified four systematic reviews that included 10 primary studies, four of which corresponded to randomized trials. We conclude that the use of piezoelectric instrumentation compared to the conventional saw may reduce the risk of severe nerve damage and decrease severe bleeding (>500 mL), but the certainty of the evidence is low. On the other hand, the use of piezoelectric bone surgery may make little or no difference in postoperative pain, but the certainty of the evidence is low. Finally, we are uncertain whether piezoelectric bone surgery reduces intraoperative blood loss (continuous variable), postoperative inflammation, and operative time, as the certainty of the evidence has been assessed as very low.

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Dental transplantation is an alternative for rehabilitation with a high success rate. This article presents a clinical case of autogenous dental transplantation in a 17-year-old male patient undergoing treatment for Class III dento-facial deformity. After 32 months followup, low-cost rehabilitation was possible, and without prejudice to ortho-surgical treatment.

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Las anomalías dentoesqueletales se presentan en el 2-3% de la población. Las mismas afectan el complejo maxilomandibular como también la relación entre las arcadas dentarias. Estas alteraciones producen problemas fonéticos, deglutorios, respiratorios y estéticos. Existe una tendencia en corregir las alteraciones dentarias sin tratar las discrepancias esqueletales, dificultando la corrección quirúrgica, si esta fuera necesaria. Actualmente, la cirugía ortognática ha tenido mayor aceptación como el tratamiento ideal para pacientes con estas anomalías. Se presentará una revisión de la literatura sobre las características que esta alteración presenta, junto a la resolución de casos clínicos (AU)

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Introdução: As fissuras labiopalatinas são malformações congênitas e, no Brasil, estima-se a ocorrência de 1:650 nascimentos. A classificação adotada é a de Spina. A queiloplastia e a palatoplastia são as principais cirurgias executadas. Métodos: Estudo retrospectivo descritivo com obtenção de dados a partir do sistema Smile Train Express referente a pacientes com fissura labiopalatina atendidos por equipe cirúrgica de referência entre 1 de março de 2014 e 1 de dezembro de 2016. Resultados: Foram identificados 477 pacientes, predominando o sexo masculino e os dois primeiros anos de vida na admissão. A fissura mais prevalente foi transforame e unilateral esquerda. O tratamento cirúrgico mais frequente foi a queiloplastia. Conclusões: O padrão epidemiológico está em consonância com a literatura nacional.

Introduction: Orofacial clefts are congenital malformations with an estimated occurrence of 1:650 births in Brazil. The most widely adopted classification system in that country is the method developed by Spina, and cheiloplasty and palatoplasty are the main surgeries performed. Methods: This was a retrospective descriptive study using data collected from the Smile Train Express organization regarding patients with orofacial clefts treated by a reference surgical team between March 1, 2014 and December 1, 2016. Results: A total of 477 patients were identified, predominantly male and in the first two years of life at admission. The most prevalent type of malformation was left unilateral transforamen cleft. The most frequent surgical treatment was cheiloplasty. Conclusions: The epidemiological pattern is consistent with the findings described in the national literature.

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Bone reconstruction in craniofacial surgery is a challenge for surgeons, who most commonly adopt the autogenous bone grafting and alloplastic implants in such procedures. Among the alloplastic materials, the high-density porous polyethylene is highlighted-Medpor (Medpor, Porex Surgical Inc, Newman, GA), considered to be pure polyethylene, with only 1 manufacturing process and standard pore size. The purpose of the current study has been to present through a review of literature and the types of complications derived from the use of Medpor in craniomaxillofacial bone surgery. A specific and sensitive database was initially created via PubMed, focusing on studies published in English peer-reviewed journals between 2004 and 2014, including case reports, experimental studies in humans, and prospective and retrospective studies. Forty articles were found at PubMed database. After analyzing their abstracts, 19 were selected, totaling 1453 patients and 121 complications, being the most commonly reported diplopia with 56 patients and infection with 6 patients. Most of the complications reported in the articles used for the development of the current review are not directly related to the use of the Medpor implant. The only complications directly related to the use of this biomaterial were cases of infection.

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BACKGROUND: Nasomaxillary dysplasia (Binder syndrome) and cleft are congenital malformations of the midface. Ideally, the nasal deformity is treated from childhood. This approach leads to the need for several surgeries and revisions until full growth is reached. As a result of multiples procedures, the skin over the nasal dorsum sometimes becomes thin, atrophic and could be strongly attached to underlying grafts. For this setting of patients when another rhinoplasty is required, it becomes a technical challenge. The authors describe their experience in complex secondary rhinoplasty performed in patients with thin atrophic skin using the anteriorly based galeo-pericranial frontalis flap (GPFF) to improve the quality of the covering soft tissue along the whole nose skeleton area. RESULTS: Since 2013, 3 female patients; 2 of them with Binder syndrome and 1 cleft lip/palate patient (average 18 years) with previous rhinoplasty (3-6 procedures) are subjected to secondary rhinoplasty using GPFF turning it over the osteochondral nasal framework. Postoperative follow-up was 3 to 18 months. There were no viability complications of the dorsum skin flap in the immediate postoperative period. At long-term follow-up, a visible improvement of local skin conditions and restoration of the nasal contour was achieved. CONCLUSIONS: The anteriorly based GPFF is a well-vascularized versatile flap used extensively in anterior cranial fossa surgery and frontal sinus trauma. Given its known and constant vascular anatomy, this flap is adapted to a new application in complex secondary rhinoplasty, in the presence of atrophic skin with good aesthetic outcomes.

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The change in neurosensory lesions that develop after bilateral sagittal split osteotomy (BSSO) was explored, and the influence of the application of combination uridine triphosphate (UTP), cytidine monophosphate (CMP), and hydroxycobalamin (vitamin B12) on patient outcomes was assessed. This was a randomized, controlled, double-blind trial. The study sample comprised 12 patients, each evaluated on both sides (thus 24 sides). All patients fulfilled defined selection criteria. Changes in the lesions were measured both subjectively and objectively. The sample was divided into two patient groups: an experimental group receiving medication and a control group receiving placebo. The statistical analysis was performed using SPSS software. Lesions in both groups improved and no statistically significant difference between the groups was observed at any time. 'Severe' injuries in the experimental group were more likely to exhibit a significant improvement after 6 months. Based on the results of the present study, it is concluded that the combination UTP, CMP, and hydroxycobalamin did not influence recovery from neurosensory disorders.

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The success of craniomaxillofacial (CMF) surgery depends not only on the surgical techniques, but also on an accurate surgical plan. The adoption of computer-aided surgical simulation (CASS) has created a paradigm shift in surgical planning. However, planning an orthognathic operation using CASS differs fundamentally from planning using traditional methods. With this in mind, the Surgical Planning Laboratory of Houston Methodist Research Institute has developed a CASS protocol designed specifically for orthognathic surgery. The purpose of this article is to present an algorithm using virtual tools for planning a double-jaw orthognathic operation. This paper will serve as an operation manual for surgeons wanting to incorporate CASS into their clinical practice.

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