| BackgroundAnthropometry[1]is a subject exploring the characteristics,types,variations and developmental laws of the human body through holistic and local measurements.In the practices of aesthetic medicine,it is of great significance to accurately measure,collect and analyze the concrete data of the relevant parts of the human body through scientific and simple means,and to establish the corresponding human body database for designing the pre-operation and guiding the actual operation of plastic surgery.Auricle is one of the most important organs of the anatomical structure of human body surface.Both physical and psychological traumas will be caused whether there is a congenital or traumatic auricle malformation.At present,surgery is the preferred choice for the treatment of auricle malformation.The study of the normal range of each measurement index of ear,and the analyses of the differences in the measurement indexes and the relations of the ratios under different ages can provide clinicians with objective data to judge the degree of ear deformities and evaluate the surgery effects.They can also offer accurate and quantitative standard basis for auricular restoration,making the clinical evaluation and treatment design of ear surgery more scientific and reasonable.There are obvious racial,regional and gender differences in the auricle characteristics[2-4],on which numerous scholars at home and abroad have carried out relevant research.Although the Han population in the Central Plains area is large,there are few studies on their auricle characteristics.Objectives1.To make a comparison of the differences between direct measurement and 3D scanning measurement in the auricle measurement,and to explore whether 3D scanning measurement can be applied to auricle measurement.2.To have an acknowledge of the auricle morphology of the different age groups in Central Plains area and quantify the relevant indexes.3.To provide references for the application of 3D scanning measurement and 3D printing technology in plastic surgery.4.To offer references for preoperative design and postoperative effect evaluation in the repair surgery of auricular deformity.Methods1.The auricles of 30 adults were measured by direct measurement and 3D scanning measurement respectively.The differences between the two methods were compared.The applicability of 3D scanning measurement to ear measurement and the announcements of the two methods in clinical application were summarized.2.A total of 337 Han adults in Central Plains area were randomly selected as the research samples.The males and females were divided into various groups according to the ages:the groups of 18-30,31-40,41-50,51-60.The auricles were measured by3D scanning method.Seven indicators were measured and two related indexes were calculated.Each result was compared and analyzed among different age groups.The possible causes of the differences were analyzed in combination of the relevant research results both at home and abroad.Results1.Comparison results of the two measuring methods:There are no statistical difference between the two methods in the measurement of physiognomic ear length,physiognomic ear breadth,morphological ear breadth,ear lobe length,earlobe breadth?1?,and earlobe breadth?2?.The morphological ear lengths are different between the two methods.2.Results of Auricle measurements of Han adults of different ages in Central Plains area:?1??1?Physiognomic ear lengths:male 18-30 age group?65.47±3.59?mm,31-40 age group?67.424±4.088?mm,41-50 age group?69.695±3.421?mm,51-60-year age group?69.849±4.106?mm;female 18-30 age group?60.204±3.158?mm,31-40 age group?63.383±3.998?mm,41-50 age group?65.073±4.079?mm,51-60 age group?66.887±3.543?mm.?2?Physiognomic ear breadth:male 18-30years age group?33.987±2.569?mm,31-40 age group?34.042±2.262?mm,41-50age group?34.796±2.152?mm,age 51-60 years old group?34.686±1.846?mm;female 18-30 age group?31.549±1.980?mm,31-40 age group?32.145±2.092?mm,41-50 age group?32.870±1.923?mm,51-60 age group?33.867±2.048?mm.?3?Morphological ear length male 18-30 age group?30.964±2.707?mm,31-40 age group?31.258±2.361?mm,41-50 age group?31.221±3.177?mm,51-60 age group?31.151±2.185?mm;female 18-30 age group?26.809±3.080?mm,31-40 age group?28.468±3.143?mm,41-50 age group?27.809±2.897?mm,51-60 age group?30.133±2.103?mm.?4?Morphological ear breadth:male 18-30 age group?54.714±3.932?mm,31-40 age group?56.241±3.9036?mm,41-50 age group?58.358±3.291?mm,51-60 age group?59.889±3.733?mm;female 18-30 age group?50.782±3.219?mm,31-40 age group?54.107±4.070?mm,41-50 age group?55.063±4.420?mm,51-60 age group?56.822±3.921?mm.?5?Earlobe length:Male 18-30age group?18.306±2.151?mm,31-40 age group?20.117±2.280?mm,41-50 age group?20.665±2.014?mm,51-60 age group?20.989±2.082?mm;female 18-30 age group?18.159±1.690?mm,31-40 age group?19.109±2.165?mm,41-50 age group?20.528±2.482?mm,51-60 age group?21.289±2.136?mm.?6?Ear lobe breadth?1?:male 18-30 age group?19.856±2.308?mm,31-40 age group?20.753±2.466?mm,41-50 age group?19.628±2.345?mm,51-60age group?19.983±1.567?mm;female 18-30 age group?18.561±1.425?mm,31-40 age group?19.013±1.998?mm,41-50 age group?19.664±2.002?mm,51-60group?20.313±1.708?mm.?7?Ear lobe breadth?2?:male 18-30 age group?21.475±1.960?mm,31-40 age group?22.109±2.430?mm,41-50 age group?21.492±1.895?mm,51-60 age group?21.459±1.720?mm;female 18-30 age group?20.045±1.796?mm,31-40 age group?19.844±2.002?mm,41-50 age group?20.766±2.302?mm,51-60 age group?21.828±1.687?mm.There are statistical differences among different age groups.?2?There are statistical differences in physiognomic ear length,physiognomic ear breadth,morphological ear length,morphological ear breadth and earlobe length among males in different ages?P<0.05 or P<0.01?,and there are statistical differences in physiognomic ear length,physiognomic ear breadth,morphological ear length,morphological ear breadth,earlobe length,earlobe breadth?1?and earlobe breadth?2?among females in different ages?P<0.05 or P<0.01?.Conclusions1.3D scanning method is applicable to auricle measurement.In clinical application,direct measurement and 3D scanning measurement should be carefully chosen according to research purposes,and the two methods can be combined when necessary.2.The change laws of the auricle index of Han adults in Central Plains area with regards to age:?1?Change laws of auricle measurement index:there are statistical differences in physiognomic ear length,physiognomic ear breadth,morphological ear length and morphological ear breadth between the males and females of different age groups,which gradually increased with age.?2?There are statistical differences in the earlobe length between males in different ages.There are statistical differences in the earlobe length and earlobe breadth between females in different ages.?3?There is a gender difference in auricles.The measurement index sizes of the males'auricles are larger than those of the females. |
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