ABSTRACT
OBJETIVO: Determinar la frecuencia y correlación de las episiotomías y desgarros en pacientes con parto eutócico. MATERIALES Y MÉTODOS: Estudio observacional y retrospectivo efectuado en el Hospital General Universitario de Alicante en dos periodos: 1) 2008-2012 y 2) 2013-2018. Se incluyen los partos eutócicos de embarazos únicos, a término, en presentación cefálica. Variables de estudio: episiotomía, desgarro, edad, semanas de embarazo, paridad, inducción del parto, cesárea anterior, analgesia regional, peso y sexo del recién nacido. Los resultados se expresan en porcentaje, coeficiente de correlación y las variables implicadas con razón de momios (RM). RESULTADOS: La tasa de episiotomía entre el periodo 1 vs el 2 disminuyó de manera muy importante: de 42.3 a 32.8%; [p < 0.001; RM: 0.81 (0.78-0.84)]. En cambio, el porcentaje de desgarros aumentó: de 42.7 a 50.8%; (p < 0.001; RM: 1.16[1.13-1.20]). El coeficiente de correlación fue de -0.91. Uno de los factores de riesgo asociados con la episiotomía fue la edad menor de 35 años, con RM de 1.25; IC95%: 1.16-1.35; p < 0.001, pero fue un factor protector de desgarros con RM de 0.76; IC95%: 0.71-0.81; p < 0.001. CONCLUSIONES: La tendencia de la episiotomía es decreciente, mientras que la de desgarro es inversamente proporcional. No se encontraron diferencias en la tasa de desgarro de III y IV grado.
Abstract OBJECTIVE: To determine the frequency and correlation of episiotomies and tears of patients with eutocic deliveries. MATERIALS AND METHODS: Observational and retrospective study carried out at the Hospital General de Alicante, Spain, in two periods: 1) 2008-2012 and 2) 2013-2018. Eutocic deliveries of single pregnancies, at term, in cephalic presentation are included. Study variables: episiotomies, tear, age, weeks of pregnancy, parity, labor induction, previous caesarean section, regional analgesia, weight and sex of the newborn. The results are expressed as a percentage, correlation coefficient and the variables involved with odds ratio. RESULTS: The episiotomy rate between period 1 vs. 2 decreased very significantly: 42.3% vs 32.8%; [p <0.001; OR: 0.81 (0.78-0.84)]. In contrast, the percentage of index tears: 42.7% vs 50.8%; (p <0.001; OR: 1.16 [1.13-1.20]). The correlation coefficient was -0.91. Regarding risk factors associated with episiotomy, one of them was the age under 35 years with an OR (95% CI): 1.25 (1.16-1.35; p <0.001), but it was a OR protective factor (95% CI): 0.76 (0.71-0.81; p <0.001) for the appearance of tears. CONCLUSIONS: The tendency in the realization of episiotomies is decreasing, while the tendency of the appearance of tears is inversely proportional. No differences were found in the tear rate of III and IV grade.
ABSTRACT
PURPOSE: When performing an occlusal procedure, it is recommended that the patient should be sitting straight with the head in a natural position. An inappropriate mandibular position caused by an incorrect occlusal record registration or occlusal adjustment can result in damaged teeth and cause functional disorders in muscles and temporomandibular joints. The purpose of this study was to clarify the influence of horizontal cephalic rotation on mandibular position by investigating the three-dimensional positions of condylar and incisal points. MATERIALS AND METHODS: A three-dimensional jaw movement measurement device with six degrees of freedom (the WinJaw System) was used to measure condylar and incisal points. The subjects were asked to sit straight with the head in a natural position. The subjects were then instructed to rotate their head horizontally 0°, 10°, 20°, 30°, 40°, 50°and 60° in the right or left direction. RESULTS: The results indicated that horizontal cephalic rotation made the condyle on the rotating side shift forward, downward, and toward the inside, and the condyle on the counter rotating side shift backward, upward, and toward the outside. Significant differences in deviations were found for angles of rotation higher than 20°. The incisal point shifted in the forward and counterrotating directions, and significant differences were found for angles of rotation higher than 20°. CONCLUSION: The mandibular position was altered by horizontal cephalic rotations of more than 20°. It is essential to consider the possibility of deviation of the mandibular position during occlusal procedures.