In vitro measurement of adult Chinese scapula glenoid version angle with MSCT postprocessing technique

Objective To investigate method of in vitro measurement of adult Chinese scapula glenoid version angle with MSCT postprocessing technique.Methods Fifty dry scapula specimens and 50 wet anticorrosive shoulder specimens of adult Chinese were scanned with Siemens Somatom Sensation 16 scanner.The scapula glenoid version angle was measured with postprocessing technique of thick or thin multiplanner reformation(MPR),and the data were analyzed statistically.Results The scapula glenoid version angle of dry scapula specimens and wet anticorrosive shoulder specimens was(-0.40±4.10)°,(-3.00±4.49)° with thick MPR,and(-0.34±4.21)°,(-2.70±4.54)° measured with thin MPR,respectively.There was significant difference of the scapula glenoid version angles between the dry scapula specimens and wet anticorrosive shoulder specimens(P 0.05),but not between thick or thin MPR measurement(P 0.05).Conclusion Measuring the scapula glenoid version angle with thick MPR of MSCT is simple and fast.The scapula glenoid version angle is markedly variable between the dry scapula specimens and wet anticorrosive shoulder specimens.The retroversion angle of scapula glenoid is about 3°,which should be considered in the design of shoulder prosthesis.