Best bone of acetabulum for cup component placement in Crowe types Ⅰto Ⅲ dysplastic hips:a computer simulation study  

作　　者：Lin-Li Zheng Yang-Yang Lin Xiao-Yan Zhang Qian-Hui Ling Wei-Ming Liao Pei-Hui Wu 

机构地区：[1]Department of Joint Surgery,the First Affiliated Hospital,Sun Yat-sen University,Guangzhou,Guangdong 510080,China [2]Department of Rehabilitation Medicine,the Sixth Affiliated Hospital,Sun Yat-sen University,Guangzhou,Guangdong 510655,China [3]College of Computer Science&Software Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China [4]Zhongshan Medical School,Sun Yat-sen University,Guangzhou,Guangdong 510080,China

出　　处：《Chinese Medical Journal》2019年第23期2820-2826,共7页中华医学杂志（英文版）

摘　　要：Background:During cup implantation,vertical height of the cup center(V-HCC)should be precisely controlled to achieve sufficient bone-cup coverage(BCC).Our study aimed to investigate the acetabular bone stock and the quantitative relationship between V-HCC and BCC in Crowe types Ⅰto Ⅲ hips.Methods:From November 2013 to March 2016,pelvic models of 51 patients(61 hips)with hip dysplasia were retrospectively reconstructed using a computer software.Acetabular height and doom thickness were measured on the mid-acetabular coronal cross section.V-HCC was defined as the vertical distance of cup rotational center to the interteardrop line(ITL).In the cup implantation simulation,the cup was placed at the initial preset position,with a V-HCC of 15 mm,and moved proximally by 3-mm increments.At each level,the BCC was automatically calculated by computer.Analysis of variance and Kruskal-Wallis test were used to compare the differences between groups.Results:There were no significant between-group differences in maximum thickness of the acetabular doom;however,peak bone stock values were obtained at heights of 41^3±5.14 mm(Crowe typeⅠ),47.58±4.10 mm(Crowe type Ⅱ),and 55.78±3.64 mm(Crowe type Ⅲ)above the ITL.At 15 mm of V-HCC,median BCC was 78%(75-83%)(Crowe type Ⅰ),74%(66-71%)(Crowe type Ⅱ),and 61%(57-68%)(Crowe type Ⅲ).To achieve 80%of the BCC,the median V-HCC was 16.27(15.00-16.93)mm,18.19(15.01-21.53)mm,and 24.13(21.02-28.70)mm for Crowe typesⅠ,Ⅱ,and Ⅲ hips,respectively.Conclusion:During acetabular reconstruction,slightly superior placement with V-HCC<25 mm retained sufficient bone coverage in CroweⅠto Ⅲ hips.

关 键 词：Computer simulation Congenital dysplasia Hip Three-dimensional image Total-hip replacement 

分 类 号：R68[医药卫生—骨科学]