ABSTRACT
Objective: To present a case report of maxillary lateral incisor root regeneration after severe root resorption, treated with photobiomodulation (PBM). Background: Impacted maxillary canines often come with the risk of maxillary lateral incisor root resorption, which is widely recognized as the predominant adverse effect in these situations. This progressive process of root resorption is currently irreversible, with no known way to reverse it. Materials and methods: A male patient was 14 years old. Radiographically it was observed that canine 23 is impacting against the root of 22 producing signs of root resorption and having a less than 1:1 crown-to-root ratio with mobility grade 1. From the beginning of the treatment, PBM-assisted orthodontics was proposed. To address the patient's dental concerns, the treatment plan outlined the extraction of the deciduous upper left canine tooth leaving the lateral as long as possible in the mouth. During each appointment, PBM was applied with a diode laser. The wavelength was 810 nm, Ap = 0.2 W, 4.4 J, 22 sec every 21 days, 13 applications in total (57.2J), with a 400 µm inactive surgical tip, in a scanning movement, 1 mm from the mucosa while moving following the vestibular surface of the upper left lateral and canine roots. Results: After 12 months, the 22 had root neoformation and complete closure of the apex with vitality. Conclusions: PBM with an 810 nm diode laser in this clinical case promoted root regeneration of an upper lateral incisor, with severe root resorption, owing to an impacted maxillary canine while still vital.
Subject(s)
Cuspid , Incisor , Low-Level Light Therapy , Root Resorption , Tooth, Impacted , Humans , Male , Root Resorption/etiology , Adolescent , Regeneration/radiation effects , Maxilla , Tooth Root/radiation effects , Lasers, Semiconductor/therapeutic useABSTRACT
El hematoma intramural aórtico (HIM) forma parte del espectro del síndrome aórtico agudo. En el HIM se pueden presentar colecciones de medio de contraste conocidas en la literatura como "pool sanguíneo intramural" (PSIM) y "proyección similar a una úlcera" (PSU). El PSIM puede estar comunicado con ramas de la aorta o con la luz de la misma por un orificio intimal pequeño (1-2 mm). La PSU presenta una solución de continuidad intimal mayor de 3 mm de diámetro y, a diferencia de la úlcera aterosclerótica penetrante, no se acompaña de una placa ateroesclerótica. En general, la presencia de PSIM en pacientes con HIM aórtico no se asocia a mal pronóstico. Se presenta el caso de una paciente con dolor torácico y sospecha de disección aórtica, estudiada en nuestra institución con angiografía por tomografía computada, que demostró HIM y una colección de medio de contraste en el espesor del hematoma, interpretada como pool sanguíneo intramural. Se revisan las imágenes iniciales y el control con endoprótesis aórtica.
Aortic intramural hematoma (IMH) is part of the spectrum of acute aortic syndromes. Collections of contrast medium known in the literature as "intramural blood pool" (IMBP) and "ulcer-like projections" (ULP), may be present in the IMH. An IMBP could be connected with branches of the aorta or with the aortic lumen through a small tear in the intima (1-2 mm). The ULP represents a disruption of the intima greater than 3mm of diameter and unlike the penetrating atherosclerotic ulcer, this is not associated with an atherosclerotic plaque. In general, the presence of IMBP in patients with aortic IMH is not associated with poor prognosis. We present a case of a patient with chest pain and suspected aortic dissection, studied at our institution with CT angiography, which showed an IMH and a collection of contrast medium within the thickness of the hematoma, interpreted as an intramural blood pool. The initial images and control with aortic endograft are reviewed.
