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Article: The effects of acetabular component position and hip ball diameter on posterior stability after total hip replacement

TitleThe effects of acetabular component position and hip ball diameter on posterior stability after total hip replacement
不同髖臼杯前傾位置和球頭假體大小對全髖關節置換術后后方穩定性的影響
Authors
KeywordsArthroplasty (關節成形術)
Replacement (置換)
Hip (髖)
Acetabulum (髖臼)
Hip prosthesis (髖假體)
Issue Date2009
Publisher[Zhonghua Guan Jie Wai Ke Za Zhi Bian Ji Bu (中華醫學電子音像出版社)]. The Journal's web site is located at http://zhgjwkzz.periodicals.net.cn/default.html
Citation
Chinese Journal of Joint Surgery (Electronic Version), 2009, v. 3 n. 5, p. 624-629 How to Cite?
中華關節外科雜誌(電子版), 2009, v. 3 n. 5, p. 624-629 How to Cite?
AbstractObjective To study the effects of acetabular component position and hip ball diameter on the posterior stability of the hip joint after total hip replacement.Methods Computer navigation system and synthetic bone model were used to simulate the motion of hip after total hip replacement. The hip was flexed to 90 degree and was adducted 0 and 30 degree as indicated by the computer navigation, after then it was progressively internally rotated until the hip was dislocated. The degree of internal rotation when the hip was dislocation was recorded.Results When the acetabular component abduction was 45 degree and anteversion were 0, 5, 10, 15 degrees, and the hip was flexed to 90 degree and adducted to 0 and 30 degrees, there was significant difference between 28 mm and 36 mm hip balls in the degrees of internal rotation when the hip was dislocated (P0.05). 36 mm diameter hip ball was significantly better in stability. The degree of internal rotation when the hip dislocated was less when the hip was adducted 30 degree compared to 0 degree. The stability was diminished with less acetabular component anteversion. With 0 degree anteversion and the hip adducted to 30 degree, a 28 mm diameter hip ball would lead to dislocation even if the hip was in external rotation. Conclusions The increasing anteversion of acetabular component can increase the stability of total hip replacement. Large hip ball is more stable than small hip ball. However, when anteversion of acetabular component is sufficient, there is no difference in stability between large and small hip balls.
目的探討髖臼杯的前傾位置與球頭大小對全髖關節置換(THA)術后后方穩定性的影響。方法利用計算機導航技術在假骨上模擬THA術后,不同髖臼杯前傾位置和不同球頭大小在屈髖90°、內收0°和內收30°時髖關節內旋到引起脫位的角度進行測量和比較發生后脫位時的角度差異。結果在髖臼杯外展45°、前傾0°、5°、10°、15°時,28mm和36mm球頭在屈髖90°內收0°和30°情況下內旋至脫位的角度有明顯差別(均為P<0.05),36mm球頭可有更大的內旋角度,穩定性優于28mm球頭。但當髖臼杯前傾20°時28mm與36mm球頭內旋至脫位的角度間的差異無統計學意義(P>0.05),內收30°時比內收0°時髖關節內旋至脫位的角度減小。關節穩定性隨髖臼杯前傾減小而下降。髖臼杯前傾0°和髖關節內收30°時,28mm球頭在外旋位時就可發生脫位。結論髖臼杯前傾角度增加可增加THA術后關節的穩定性,大球頭的穩定性優于小球頭,前傾達到某一角度時,大球頭和小球頭間的后方穩定性無差別。
Persistent Identifierhttp://hdl.handle.net/10722/129307
ISSN

 

DC FieldValueLanguage
dc.contributor.authorMa, WHen_US
dc.contributor.authorNg, FYen_US
dc.contributor.authorChiu, KYen_US
dc.contributor.authorZhang, SDen_US
dc.date.accessioned2010-12-23T08:35:06Z-
dc.date.available2010-12-23T08:35:06Z-
dc.date.issued2009en_US
dc.identifier.citationChinese Journal of Joint Surgery (Electronic Version), 2009, v. 3 n. 5, p. 624-629-
dc.identifier.citation中華關節外科雜誌(電子版), 2009, v. 3 n. 5, p. 624-629zh_HK
dc.identifier.issn1674-134X-
dc.identifier.urihttp://hdl.handle.net/10722/129307-
dc.description.abstractObjective To study the effects of acetabular component position and hip ball diameter on the posterior stability of the hip joint after total hip replacement.Methods Computer navigation system and synthetic bone model were used to simulate the motion of hip after total hip replacement. The hip was flexed to 90 degree and was adducted 0 and 30 degree as indicated by the computer navigation, after then it was progressively internally rotated until the hip was dislocated. The degree of internal rotation when the hip was dislocation was recorded.Results When the acetabular component abduction was 45 degree and anteversion were 0, 5, 10, 15 degrees, and the hip was flexed to 90 degree and adducted to 0 and 30 degrees, there was significant difference between 28 mm and 36 mm hip balls in the degrees of internal rotation when the hip was dislocated (P0.05). 36 mm diameter hip ball was significantly better in stability. The degree of internal rotation when the hip dislocated was less when the hip was adducted 30 degree compared to 0 degree. The stability was diminished with less acetabular component anteversion. With 0 degree anteversion and the hip adducted to 30 degree, a 28 mm diameter hip ball would lead to dislocation even if the hip was in external rotation. Conclusions The increasing anteversion of acetabular component can increase the stability of total hip replacement. Large hip ball is more stable than small hip ball. However, when anteversion of acetabular component is sufficient, there is no difference in stability between large and small hip balls.-
dc.description.abstract目的探討髖臼杯的前傾位置與球頭大小對全髖關節置換(THA)術后后方穩定性的影響。方法利用計算機導航技術在假骨上模擬THA術后,不同髖臼杯前傾位置和不同球頭大小在屈髖90°、內收0°和內收30°時髖關節內旋到引起脫位的角度進行測量和比較發生后脫位時的角度差異。結果在髖臼杯外展45°、前傾0°、5°、10°、15°時,28mm和36mm球頭在屈髖90°內收0°和30°情況下內旋至脫位的角度有明顯差別(均為P<0.05),36mm球頭可有更大的內旋角度,穩定性優于28mm球頭。但當髖臼杯前傾20°時28mm與36mm球頭內旋至脫位的角度間的差異無統計學意義(P>0.05),內收30°時比內收0°時髖關節內旋至脫位的角度減小。關節穩定性隨髖臼杯前傾減小而下降。髖臼杯前傾0°和髖關節內收30°時,28mm球頭在外旋位時就可發生脫位。結論髖臼杯前傾角度增加可增加THA術后關節的穩定性,大球頭的穩定性優于小球頭,前傾達到某一角度時,大球頭和小球頭間的后方穩定性無差別。-
dc.languagechien_US
dc.publisher[Zhonghua Guan Jie Wai Ke Za Zhi Bian Ji Bu (中華醫學電子音像出版社)]. The Journal's web site is located at http://zhgjwkzz.periodicals.net.cn/default.html-
dc.relation.ispartofChinese Journal of Joint Surgery (Electronic Version)-
dc.relation.ispartof中華關節外科雜誌(電子版)zh_HK
dc.subjectArthroplasty (關節成形術)-
dc.subjectReplacement (置換)-
dc.subjectHip (髖)-
dc.subjectAcetabulum (髖臼)-
dc.subjectHip prosthesis (髖假體)-
dc.titleThe effects of acetabular component position and hip ball diameter on posterior stability after total hip replacementen_US
dc.title不同髖臼杯前傾位置和球頭假體大小對全髖關節置換術后后方穩定性的影響zh_HK
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1674-134X&volume=3&issue=5&spage=624&epage=629&date=2009&atitle=The+effects+of+acetabular+component+position+and+hip+ball+diameter+on+posterior+stability+after+total+hip+replacement-
dc.identifier.emailNg, FY: fyng@HKUCC.hku.hken_US
dc.identifier.emailChiu, KY: pkychiu@hkucc.hku.hken_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.hkuros178195en_US
dc.identifier.volume3-
dc.identifier.issue5-
dc.identifier.spage624en_US
dc.identifier.epage629en_US
dc.publisher.placeChina (中國)-
dc.identifier.cnkiCNKI:SUN:ZHGJ.0.2009-05-018-

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