Morphology and Morphometry of the Distal Articular Surface of Lunate Bone in a Kenyan Population/ Morfologia y Morfometria de la Superficie Articular Distal del Hueso Semilunar en Una Poblacion de Kenia

The morphology and morphometry of the distal articular surface of the lunate exhibits inter-population variations. They are of clinical importance to hand surgeons due to their influence on the occurrence of proximal pole arthrosis which is a cause of ulnar-side wrist pain. The objective of the stud...

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Bibliographic Details
Published inInternational journal of morphology Vol. 34; no. 3; p. 896
Main Authors Muthoka, Johnstone M, Kaisha, Wycliff O, Gikenye, Gachambira, Ogengo, Julius A
Format Journal Article
LanguageSpanish
Published Universidad de La Frontera, Facultad de Medicina 01.09.2016
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Summary:The morphology and morphometry of the distal articular surface of the lunate exhibits inter-population variations. They are of clinical importance to hand surgeons due to their influence on the occurrence of proximal pole arthrosis which is a cause of ulnar-side wrist pain. The objective of the study was to determine the morphology and morphometry of the distal articular surface of the lunate bone in an adult Kenyan population. A descriptive cross-sectional study at the Department of Human Anatomy, University of Nairobi. Fifty-six human hands obtained for routine dissection were used. The morphology of the distal articular surface of the lunate was classified as either Type I or Type II depending on the absence or presence of a medial facet for articulation with the hamate respectively. The width of the wrists and of the medial facet in Type II lunates was measured with SOMETTM CN-25 1234 vernier calipers (accurate to 1mm). Photomacrographs of representative lunate were taken. Data were analyzed using SPSS version 17.0. The Pearson correlation test was used to check for any correlations. Type II lunate morphology was more common with a prevalence of 34 (61 %) while 19 (34 %) were Type I. The mean width of wrists with Type I lunate was 41.1 [+ or -] 2.8 mm while those with Type II had a mean width of 46.1 [+ or -] 4.3 mm. The mean width of the medial facet in lunate type II was 4.4 [+ or -] 1.4 mm. Lunotriquetral fusion was demonstrated in 3 (5 %) wrists. Prevalence of Type II lunate was higher than Type I. Wrists with a Type II lunate were wider than those with Type I. There was no correlation between the width of the wrist and the width of the medial facet of the lunate. KEY WORDS: Hand; Lunate; Wrist; Kenyan. La morfologia y morfometria de la superficie articular distal del hueso semilunar muestra variaciones entre la poblacion. Es de importancia clinica para los cirujanos de mano debido a su influencia en la incidencia de la artrosis del polo proximal, que causa dolor ulnar en la muneca. El objetivo fue determinar la morfologia y morfometria de la superficie articular del hueso semilunar en una poblacion adulta de Kenia. Estudio descriptivo de corte transversal, realizado en el Departamento de Anatomia Humana de la Universidad de Nairobi. Se utilizaron 56 manos humanas que fueron sometidas a diseccion de rutina. La morfologia de la superficie articular distal del hueso semilunar se clasifico en Tipo I o Tipo II en funcion de la ausencia o presencia de una faceta medial de la articulacion. El ancho de las munecas y de la faceta medial en el Tipo II se midio con el caliper SOMETTM CN-25 1234 (precision de 1 mm). Se tomaron macrofotografias representativas del hueso semilunar. Los datos fueron analizados con el programa SPSS version 17.0. Se utilizo la prueba de correlacion de Pearson. La morfologia del hueso semilunar Tipo II fue mas frecuente con una prevalencia de 34 casos (61 %), mientras que 19 casos (34 %) eran de Tipo I. El ancho promedio de las munecas del hueso semilunar Tipo I fue de 41,1 [+ or -] 2,8 mm, mientras que las de Tipo II fue de 46,1 [+ or -] 4,3 mm. El ancho promedio de la cara medial del hueso semilunar Tipo II fue de 4,4 [+ or -] 1,4 mm. Se demostro fusion semilunar- piramidal en 3 casos (5 %). La prevalencia del hueso semilunar Tipo II fue mayor que la del hueso semilunar Tipo I. Las munecas que presentaban hueso semilunar Tipo II fueron mas anchas que las de Tipo I. No hubo correlacion entre el ancho de la muneca y el ancho de la faceta medial del hueso semilunar PALABRAS CLAVE: Mano; Hueso Semilunar; Muneca; Keniano.
ISSN:0717-9367