Instrumental piezoeléctrico comparado con sierra convencional en cirugía ortognática / Piezoelectric bone surgery compared to conventional saw in orthognathic surgery

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.

Cephalometric for Orthognathic Surgery (COGS) Analysis for Saudi Population

ABSTRACT Objective: To establish the cephalometric (Ceph.) norm by Ceph. for orthognathic surgery (COGS) analysis for Saudi population. Material and Methods: 500 adult Saudi samples (250 males and 250 females) with the age range of 18-30 years old were selected for this study. The selections of samples were based on a normal occlusal relationship, no history of facial trauma and no previous orthodontic treatment. Lateral Ceph. radiographs were tracing by CASSOS software and analyzed by SPSS software according to COGS analysis. Results: Significant differences were showed between the Saudi males and females on most of the Ceph. parameters. The Saudi males had a convex facial profile with chin prominent and more bimaxillary protrusion, upper and lower lip protrusion than the Saudi females. Conclusion: This study evaluated the craniofacial morphological difference between the male and the female population in Saudi Arabia by using COGS analysis. The finding of this study will help for better diagnosis of orthodontic and orthognathic surgical treatment planning and identify the morphological facial characteristics of Saudi patients.

Evaluating the Effectiveness of Orthognathic Surgery on the Pre-existing Temporomandibular Disorders in Patients with Malocclusion: A Systematic Review and Meta-analysis

Abstract Objective: To evaluate the prevalence of temporomandibular disorders (TMDs) for those patients with dentofacial deformities, who underwent orthognathic surgery, and the control group. It also identified whether orthognathic surgery had a positive or negative impact on TMD symptoms by comparing TMD patients, who underwent orthognathic surgery, and people did not experience this surgery. Finally, this systematic review and meta-analysis aimed to evaluate the effectiveness of orthognathic surgery on the pre-existing TMDs in malocclusion patients. Material and Methods: MEDLINE, PubMed, Cochrane Library, Embase, ISI, google scholar have been utilized as the electronic databases for systematically reviewing the literature between 2001 and February 2019. Inclusion criteria were undergoing orthognathic surgery, patients with/without pre-existing TMDs, and physical disabilities. Results: A total of 669 abstracts and titles with potential relevance have been identified in the course of the manual and electronic searches. It has been found that five studies met our inclusion criteria for a systematic review. Temporomandibular disorders (TMDs) before orthognathic surgery in comparison to the controls (RR=0.02; 95% CI -0.08-0.13) and heterogeneity among the papers has been I2 = 42.86% (p=0.64). Conclusion: Malocclusion by orthognathic and orthodontics surgeries had a considerable rate of TMD compared to the controls.