ABSTRACT
OBJECTIVE: To determine and compare the micro topographic characteristics of dental implants submitted to different surface treatments, using scanning electron microscopy (SEM). MATERIALS AND METHODS: Implants were divided into 7 groups of 3 specimens each, according to the surface treatment used: group 1: Osseotite, BIOMET 3i; group 2: SLA surface, Institut Straumann AG; group 3: Oxalife surface, Tree-Oss implant; group 4: B&W implant surface; group 5: Q-implant surface; group 6: ML implant surface; group 7: RBM surface, Rosterdent implant. The surfaces were examined under SEM (Carl Zeiss FE-SEM-SIGMA). Image Proplus software was used to determine the number and mean diameter of pores per area unit (mm). The data obtained were analyzed with the Mann-Whitney test. A confocal laser microscope (LEXT-OLS4100 Olympus) was used to conduct the comparative study of surface roughness (Ra). Data were analyzed using Tukey's HSD test. RESULTS: The largest average pore diameter calculated in microns was found in group 5 (3.45 µm+/-1.91) while the smallest in group 7 (1.47µm+/-1.29). Significant differences were observed among each one of the groups studied (p<0.05). The largest number of pores/mm(2) was found in group 2 (229343) and the smallest number in group 4 (10937). Group 2 showed significant differences regarding the other groups (p<0.05). The greatest roughness (Ra) was observed in group 2 (0.975µm+/-0.115) and the smallest in group 4 (0.304µm+/-0.063). Group 2 was significantly different from the other groups (p<0.05). CONCLUSION: The micro topography observed in the different groups presented dissimilar and specific features, depending on the chemical treatment used for the surfaces..
ABSTRACT
Among the diverse complications of thyroidectomy, it is mostly the cordial sequels from the recurrent laryngeal nerve damage. This is why anatomical and surgical considerations are made upon the vulnerable areas of this nerve and the circumstances in which it is damaged. The relationship between the recurrent laryngeal nerve and the inferior thyroid artery, location most frequently injured, was investigated on 55 adult formulated cadavers. It was found that on the right side in 54.5% the nerve passes behind the artery, in 38.1% it passes in front of it, and between its terminal branches in 7.2%. Regarding the left side, in 67.2% the nerve passes behind the artery, in 27.2% it does so in front of it, and in 5.4% between its terminal branches; being the right nerve more anterior an lateral than the left one which would possibly explain the higher index of nervous damage on this side.
Subject(s)
Recurrent Laryngeal Nerve/anatomy & histology , Thyroid Gland/blood supply , Adult , Arteries/anatomy & histology , Arteries/surgery , Cadaver , Female , Humans , Male , Recurrent Laryngeal Nerve/surgery , Recurrent Laryngeal Nerve Injuries , Thyroidectomy/adverse effectsABSTRACT
Among the diverse complications of thyroidectomy, it is mostly the cordial sequels from the recurrent laryngeal nerve damage. This is why anatomical and surgical considerations are made upon the vulnerable areas of this nerve and the circumstances in which it is damaged. The relationship between the recurrent laryngeal nerve and the inferior thyroid artery, location most frequently injured, was investigated on 55 adult formulated cadavers. It was found that on the right side in 54.5
the nerve passes behind the artery, in 38.1
it passes in front of it, and between its terminal branches in 7.2
. Regarding the left side, in 67.2
the nerve passes behind the artery, in 27.2
it does so in front of it, and in 5.4
between its terminal branches; being the right nerve more anterior an lateral than the left one which would possibly explain the higher index of nervous damage on this side.
ABSTRACT
Se presenta una serie de 50 casos de megaesofago funcional o acalasia tratados mediante la operacion de Heller, haciendose consideraciones con respecto al criterio intervencionista y de orden tecnico operatorio. Se concluye que por ausencia de mortalidad, de complicaciones significativas y/o secuelas, y por los resultados muy buenos y buenos en el 86% de los casos, el tratamiento quirurgico merece indicarse como recurso terapeutico primario
Subject(s)
Child , Adolescent , Adult , Middle Aged , Humans , Male , Female , Esophageal Achalasia , Surgical Procedures, OperativeSubject(s)
Adult , Middle Aged , Humans , Male , Female , Digestive System Neoplasms , Neoplasms, Multiple PrimaryABSTRACT
Se presenta una serie de 50 casos de megaesofago funcional o acalasia tratados mediante la operacion de Heller, haciendose consideraciones con respecto al criterio intervencionista y de orden tecnico operatorio. Se concluye que por ausencia de mortalidad, de complicaciones significativas y/o secuelas, y por los resultados muy buenos y buenos en el 86% de los casos, el tratamiento quirurgico merece indicarse como recurso terapeutico primario
