Surface scanned 3D designed customized chinstrap for the treatment of intraoral dehiscence in polytraumatized patient. Technical note.

The advent of 3D surgical technology has revolutionized personalized medicine, enabling the development of tailored solutions for individual patients. This technical note presents the application of 3D technology in designing a customized chin guard using flexible 3D resin. The process involves surface scanning the lower facial region of a polytraumatized patient with a structured-light surface 3D scanner, generating a detailed point cloud. The acquired data undergoes meticulous processing within an specific professional software, including erasing unwanted portions, aligning frames, and mesh consolidation. Subsequently, the mesh is exported as an STL file and further refined using a 3D mesh management software. A customized chin support is designed for the specific patient's needs, exported in STL format, and 3D printed using a stereolithography (SLA) printer with Flexible 80A resin. Post-printing procedures involve washing and curing to ensure biocompatibility and optimal mechanical characteristics. The resultant customized chin guard, attached to elastic support straps, offers a precise fit to the patient's anatomy, enhancing comfort and allowing for extended wear. This innovative approach addresses the challenge of surgical intraoral wound dehiscence in a polytraumatized patient, showcasing the potential of 3D technology in personalized medical solutions for complex cases. Key words:Surface scanner, 3D surgery, customized surgery, chinstrap.

Application of 3D technology for the design of a guidewire for deep cervicofacial collections percutaneous management.

Background: This study aims to present a case of deep cervicofacial abscesses and demonstrate the efficacy of CT-guided drainage with a custom-designed puncture guide in a challenging anatomical location. The use of this type of guide is an innovative technique since CAD-CAM technology has not been used for this type of application until now. Material and Methods: A 76-year-old man with persistent facial swelling and trismus underwent surgical drainage initially, but symptoms persisted. A CT-guided transcutaneous approach was planned using a custom-designed positioning guide created with "in-house" 3D technology. The guide was fabricated using Surgical Guide resin, and the patient underwent successful CT-guided drainage. Results: The intervention facilitated precise drainage without damaging critical anatomical structures. The patient exhibited prompt clinical improvement, shortened hospitalization, and favorable aesthetic outcomes. Conclusions: CT-guided drainage, particularly when combined with a custom puncture guide, offers a less invasive alternative for challenging cervicofacial abscesses. This approach proves valuable in reducing procedure duration, minimizing soft tissue trauma, and enhancing preoperative planning, making it especially beneficial for patients with high anesthetic risk or complex anatomical considerations. Key words:Cervical abscess, 3D technology, drainage guide, percutaneous puncture.

Buccal cheek mucosa solitary fibrous tumor. Case report.

Solitary fibrous tumor (STF) is a mesenchymal tumor that mainly appears in the pleura. Its presence in the oral cavity is very uncommon, being the buccal mucosa the most frequent location. Imaging cannot distinguish this entity between other types of tumors, being histological and immunohistochemical studies essential for its diagnosis. Immunohistochemical stains typically show positive results for CD34, Bcl2, and CD99. Surgical removal with wide margins is the gold standard treatment, requiring a close follow up due to recurrence risk. We present a case report of a solitary fibrous tumor located in the buccal cheek mucosa and the surgical approach. Key words:Solitary fibrous tumor, Buccal mucosa, Intraoral, Immunohistochemical markers.

Respiratory morbidity associated with viral respiratory infections during neonatal stage in premature infants.

BACKGROUND AND OBJECTIVE: Very low birth weight (VLBW) infants are highly susceptible to viral respiratory infections (VRIs), even during admission to the neonatal intensive care unit (NICU). Although the role of VRI in childhood in the development of recurrent wheezing and long-term asthma is well known, information on the impact in later morbidity of VRI in the neonatal period is lacking. We aimed to explore the occurrence of recurrent wheezing over the first 2 years of life according to VRI status during NICU admission. METHODS: During April 2016 and December 2017, infants below 32 weeks of gestation were prospectively studied in VRI surveillance during NICU admission. Families were contacted between September 2018 and May 2019 by a telephone questionnaire. RESULTS: A total of 99 patients were enrolled. The mean gestational age and birth weight were 28.8 (1.9) weeks and 1118 (329) g, respectively. During the first 2 years of life, neither episodes of wheezing nor the respiratory impairment-related hospital admissions differed between positive and negative VRI infants. Episodes of wheezing and respiratory impairment-related hospital admissions, as well as specific respiratory treatment prescription, were more frequent within the first 2 years in infants who had suffered symptomatic VRI during NICU admission. CONCLUSION: Symptomatic VRI in VLBW infants is associated with long-term respiratory morbidity. The early surveillance of VRI in the preterm infant during NICU admission is justified for prognostic counseling and closely monitoring after discharge. Routine instruction on asthma-related risk factors and early prescription of antiasthmatic treatments, when indicated, should be established.

Nota técnica: planificación virtual 3D en el tratamiento de fractura doble en mandíbula atrófica / Technical note: 3D virtual planning for atrophic mandible double fracture reduction

El uso de la planificación virtual ha demostrado en varios estudios una mayor predictibilidad de los resultados quirúrgicos, así como una reducción del tiempo quirúrgico y la posibilidad de comparar nuestros resultados con los esperados mediante una comparación con un TC postoperatorio. En esta nota técnica se describe cómo planificar de forma virtual la cirugía mediante tecnología 3D “in house” de fracturas en mandíbulas atróficas usando un software de uso libre. (AU)

The use of virtual planning has demonstrated in several studies greater predictability of surgical results, as well as a reduction in surgical time. In addition, we have the possibility to compare our results with the planning through a comparison with a postoperative CT. This technical note aims to describe how to plan surgery for fractures in atrophic mandibles using pre-surgical 3D technology and a free software. (AU)