Joints II Please enable JavaScript in your browser to complete this form.Please enable JavaScript in your browser to complete this form.Question 2)Presurgical planning for a left total hip arthroplasty is shown in Figures A and B When placing the acetabular component in the position shown in Figure A, how will the effect differ versus using the method shown in Figure B?Arthroplasty Question 2) Figure A & B Select the Correct AnswerIncreased hip offsetIncreased joint reactive forcesNo change in hip offsetNo change in joint reactive forcesDecreased joint reactive forcesCorrect Answer: decreased joint reactive forces Explanation: Placement of the acetabular cup at the inferomedial edge of the acetabulum will result in overmedialization of the acetabular component. Although this may be advantageous because it decreases joint reactive forces by way of a decrease in the body weight lever arm, it will also cause a decrease in hip offset, which can result in a loss of soft-tissue tenson and potential for instability. References: Source 2015 AAOS OITE Della Valle AG, Padgett DE, Salvati EA. Preoperative planning for primary total hip arthroplasty. J Am Acad Orthop Surg. 2005 Nov;13(7):455-62. Review. PubMed PMID: 16272270. McAuley JP, Ridgeway SR. Preoperative planning to prevent dislocation of the hip. Orthop Clin North Am. 2001 Oct;32(4):579-86, viii. PubMed PMID: 11689371. Wrong Answer: Please try again! Submit Post navigation Previous QuestionSports IIINext QuestionJoints III
