SciELO - Scientific Electronic Library Online

vol.128 número9Mutación del gen p53 en el cáncer de colon y rectoCintigrafía de ventilación y perfusión en el manejo del tromboembolismo pulmonar índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados


Revista médica de Chile

versión impresa ISSN 0034-9887


OGALDE L, Armando; CARDENAS A, Hernán; GONZALEZ N, José  y  MONTOYA S, Héctor. Pseudoprognathism frequency and masseter muscle activity in operated cleft lip patients. Rev. méd. Chile [online]. 2000, vol.128, n.9, pp.1005-1010. ISSN 0034-9887.

Background: As a consequence of a growth inhibition of middle third of the face, cleft lip surgery could lead to a pseudoprognathism. However, this is not always the case. Also, when facial architecture is changed, the activity of muscles such as the masseter could be disturbed. Aim: To study masseter electromyographic activity in operated cleft lip patients. Material and methods: Forty two patients with cleft lip (25 male, aged 13 to 35 years old) were studied. All were operated during their first year of life. An electromyography of masseter muscle was performed and from a teleradiography, ANB and Gonion angles were obtained. Forty healthy subjects conformed the control group Results: The sample was divided in two groups. A group of 20 patients had a significantly lower EMG voltaje than control subjects (662 ± 228 and 1511 ± 340 µV respectively, p < 0.001). Only seven patients had an anteriorly inverted bite with a mean ANB of + 1.7 and a mean molar relation of -4.8, figures that confirm the presence of pseudoprognathism. Conclusions: Eighty three percent of cleft lip patients do not have cephalometric parameters of pseudoprognathism and half of the patients have a lower masseter activity (Rev Méd Chile 2000; 128: 1005-1010)

Palabras clave : Cleft lip; Masseter muscle; Prognathism.

        · texto en Español


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons