ABSTRACT
The search for new instruments to promote an appropriate cervical preparation has led to the development of new rotary instruments such as TripleGates. However, to the best of the authors' knowledge, there is no study evaluating TripleGates effect on the “risk zone” of mandibular molars. Objectives : The aim of this study was to evaluate the effects of a crown-down sequence of Gates-Glidden and TripleGates burs on the remaining cervical dentin thickness and the total amount of dentin removed from the root canals during the instrumentation by using cone beam computed tomography. The number of separated instruments was also evaluated. Material and Methods : Mesial roots of 40 mandibular first molars were divided into 2 equal groups: crown-down sequence of Gates-Glidden (#3, #2, #1) and TripleGates burs. Cervical dentin thickness and canal area were measured before and after instrumentation by using cone beam computed tomography and image analysis software. Student’s t-test was used to determine significant differences at p<0.05. Results : No significant differences (p>0.05) were observed between the instruments, regarding the root canal area and dentin wall thickness. Conclusion : Both tested instruments used for cervical preparation were safe to be used in the mesial root canal of mandibular molars. .
Subject(s)
Humans , Male , Adult , Accidents, Occupational , Ammonium Hydroxide/toxicity , Burns, Inhalation/complications , Lung Injury/etiology , Lung Injury/surgery , Agriculture , Burns, Inhalation/etiology , Burns, Inhalation/physiopathology , Disease Progression , Explosions , Follow-Up Studies , Injury Severity Score , Jehovah's Witnesses , Lung Injury/physiopathology , Lung Transplantation/methods , Quality of Life , Rare Diseases , Risk Assessment , Time Factors , Treatment OutcomeABSTRACT
La mayoría de las muertes tempranas por accidentes con fuego son provocadas por la inhalación de gases más que por las lesiones causadas por llamas, debido principalmente al compromiso ventilatorio que esto produce. Por lo anterior debe existir un alto grado de sospecha de compromiso de vía aérea en aquellos pacientes que presenten quemaduras faciales, en espacios cerrados, vibrisas chamuscadas, compromiso respiratorio progresivo, esputo carbonáceo o que se encuentren en estado de inconciencia. Sin embargo, la presencia de estos hallazgos no es patognomónica de daño en el árbol bronquial ni su ausencia lo descarta. El principal método de diagnóstico es la fibrobroncoscopía, que permite observar directamente las lesiones y además lavar y remover restos que puedan encontrarse en la vía aérea, pero lamentablemente no se encuentra disponible en todos los servicios de urgencia.
Most of the early deaths from accidents with are fire mainly caused by compromise of the ventilation due to gas inhalation rather thand by injuries caused by flames. Therefore there must be a high degree of suspicion of air compromise for patients presenting facial burns indoors, burnt hair of the nasal cavity, progressive respiratory compromise, carbonaceous sputum or unconsciousness. However, neither is the presence of these findings pathognomonic of damage to the bronchial tree nor does their discharge it. The main method is the fibrobroncoscopy diagnosis, which allows direct observation of the injuries and also the washing and removal of debris that can be found in the airways. Unfortunately, this is method is not available in all amergency services.
Subject(s)
Humans , Airway Obstruction/diagnosis , Airway Obstruction/etiology , Airway Obstruction/physiopathology , Airway Obstruction/therapy , Burns, Inhalation/diagnosis , Burns, Inhalation/physiopathology , Burns, Inhalation/therapy , Smoke Inhalation Injury/complications , Carbon Monoxide/adverse effectsABSTRACT
Every year almost three thousand people get burned in Chile. In this group, about 40 percent of the critical burned patients also suffer inhalation injury. This number is expected to grow bigger among the adult population in the next few years. Inhalation injury significantly increases mortality in burned patients. The prevalence, pathophysiology, clinical characteristics, treatment, and prognosis of this pathology have not been incorporated in the undergraduate curses of Chilean medical schools. Therefore, this subject is pooly known by most of our physicians. Because this disease will be included in the explicit warranties health plan of the public health care system in Chile, we decide to write this review about this pathological condition.
Cada año casi tres mil personas sufren quemaduras en Chile. En la población adulta se estima que este número se incrementará en los próximos años. En este grupo, cerca del 40 por ciento de las quemaduras graves se asocian a injuria inhalatoria. la injuria inhalatoria aumenta significativamente la mortalidad en los pacientes quemados. la prevalencia, fisiopatologia, cuadro clínico, manejo y pronóstico de esta patología no han sido incorporados en los estudios de pregrado de las escuelas de medicina y son temas desconocidos para la mayoría de los médicos. En el contexto de la próxima incorporación de este tipo de dolencias en el plan de garantías explícitas en la salud chilena hemos realizado una actualización del tema.
Subject(s)
Humans , Burns, Inhalation/complications , Burns, Inhalation/physiopathology , Burns, Inhalation/therapy , Prognosis , Burns, Inhalation/diagnosisABSTRACT
La inhalación de humo frío en la oveja produce cambios severos en las vías aereas, con descamación epitelial, necrosis, formación de moldes y frecuente infección secundaria. La oclusión progresiva de las vías aéreas y la severa reacción inflamatoria conducen a un colapso multifocal, bronconeumonía, edema intersticial i intraalveolar, y hemorragias. Existe una marcada y persistente infiltración de leucocitos polinucleares. La secuencia básica de eventos que ocurren en este modelo experimental parecen ser similares a los observados en las lesiones humanas por inhalación de humano y productos de la combustión