Browsing by Author "Villalta Mendoza, Fernando Mauricio"

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Evaluación de la intensidad lumínica generada por lámparas de fotopolimerización utilizadas en consultorios privados de la ciudad de Cuenca. 2018
(2019) Rodas Jaramillo, Anabel Priscila; Villalta Mendoza, Fernando Mauricio; Palacios Astudillo, Iván Andrés
The luminous intensity is important for the activation of photosensitive biomaterials and its minimum value is 400mW/cm2. The most common lamps are Halogen and LED. The presence of fractures or residues of biomaterials on their optical fiber can affect their light intensity. MATERIALS AND METHODS: The sample was 366 units, the type of lamp, trademark, model, presence or absence of fractures and residues of biomaterials on optical fiber was determined. The dental radiometer Bluephase Meter II, determined the diameter of the fiber and the light intensity. The data obtained was analyzed with the IBM SPSS Stadistics version 23 program. RESULTS: 67.2% had adequate intensity and 32.8% inadequate. In addition, 19.1% were halogen lamps and 80.9% LED. In contrast, 64.7% of units had optical fiber with a diameter of 8 mm; 15.6% of 9 mm; 12% of 10 mm; 2.2% of 11mm and 5.5% of 12mm. In addition, 78.7% did not have fiber optic fractures, but 21.3% did. Finally, 55.5% had residues of dental biomaterials on the optical fiber and 44.5% were free of them. CONCLUSIONS: 32.8% of devices had intensities lower than 400 mW / cm2, with a higher percentage of halogen lamps than LEDs. The optical fibers with diameters of 8 and 9 mm, represented the highest percentages. The light intensity can be affected by the presence of fractures or residues of dental biomaterials on the optical fiber
Light intensity of the light-curing units in private clinics in the city of Cuenca, Ecuador
(2020) Villalta Mendoza, Fernando Mauricio; Rodas Jaramillo, Anabel Priscila; Lalangui Matamoros, Joe Javier; Ajila Bohorquez, Ana Mischell; Palacios Astudillo, Iván Andrés
Photopolymerization devises light intensity relation with physical translucid barriers use
(2020) Villalta Mendoza, Fernando Mauricio
Abstract: Nowadays, the use of halogen or light emission diode (LED) devices in dental attention is constant for almost any oral treatment. The need of providing an adequate light intensity for a correct photopolymerization of the resinous materials is critical. Likewise, it is important to consider the biosecurity norms for avoiding cross-contamination by residues likely to be accumulated at the top of the light guide in contact with oral cavity fluids. Therefore, the use of translucid barriers at the top of the light guide is imperative to protect the health of the patient while providing a correct polymerization of the resinous materials. The present study analyzes the effect of using four translucid barriers in the light intensity of three dental lamps commercially available. The tested barriers are two of commercial availability, and two conventional plastic wraps. Results indicate a significant reduction of light intensity without affecting the requirements for a correct photopolymerization with any barrier. Differences among barriers points out a conventional plastic wrap as more suitable than commercially available barriers, considering only light intensity provided. Keywords: Light intensity; Sleeves; Light curing; Barriers
Unicystic ameloblastoma: literature review.
(2021) Villalta Mendoza, Fernando Mauricio; Torres Calle, María Fernanda; Pinos Pinos, Luis Sebastián; Reinoso Ortiz, Jorge Antonio
The Unicystic Ameloblastoma (UA), represents an invasive polymorphic lesion whose origin is currently unknown, but it is presumed to form from the epithelial remains of the Malassez from the epithelial sheath of Hertwig. It represents the second most prevalent odontogenic tumor, which is characterized by being locally invasive and of high recurrence. It usually presents a predilection for the male sex, affecting during the second and third decade of life. Clinically, it is asymptomatic, however, it can generate swelling with facial asymmetry, causing an expansion of the bone cortical, allowing infiltration into soft tissues. Radiographically, UA presents with a well-defined radiolucent unilocular appearance and histologically can be luminal, intraluminal and mural, depending on the characteristics of the pathological cavity. Treatment usually focuses on surgical resection of the lesion, which allows removal of the tumor with safe bone margins.