A sectional anatomical study on the interconnection of orbital fat in the Han nationality

FAN Hao; XING Xin; SHEN Di; ZHANG Yuan-zheng; TANG Wei-ya; YANG Chao

doi:10.3969/j.issn.1673-7040.2017.10.002

Abstract：Objective To obtain an anatomical basis for orbital operation through the study of the distribution and interconnection of orbital fat.Methods Twelve pairs of formalin-fixed orbital specimens and 5 pairs of fresh orbital specimens were selected.The fixed orbital specimens were removed from the orbital wall,but retained the intact periosteum.Then the specimens were fitted for the coronal,sagittal,and horizontal level by 3 mm thickness.Each pair of sectional specimens were made of histologic section,then HE and Masson staining were performed,respectively.The sectional specimens and tissue sections were observed.The fresh specimens were injected with methylene blue and dawn red A dye through the upper and lower eyelid,and sections were made for observation.Results In the sectional specimens and tissue sections,a thickened diaphragm was found between the orbital septum fat,which is divided into different sizes of cellulite,and the orbital fat continues along the channel between the muscle and the periosteum.Although there is fascia around the muscles,and it has a wide range of fiber connections with periosteum and fat leaflets,it cannot form a complete diaphragm.As a result,the intramuscular and extramuscular orbital fat interconnect with each other.In the dye injection experiment,dyes injected into the upper and lower eyelids were able to penetrate the fat in the posterior orbit and enter the orbital fat in the muscle.Conclusion Orbital fat is a continuation of the whole from the front to the back.Peripheral orbital fat continued with central orbital fat through the gap between the four rectal muscles.The fascia around the muscle and the orbital fat maintains the position of the muscle and eye.