MSC ORT final ACTUAL UPDATED Exam
Questions and CORRECT Answers
Avascular necrosis is best described as... - CORRECT ANSWER - Interruption of blood
supply leading to bone death
Sir John Charnley is credited as the father of modern joint athroplasty. Name 2 products he
introduced that made hip replacement reproducible - CORRECT ANSWER - Polyethelene
and bone cement
What is a socket of the hip called? - CORRECT ANSWER - Acetabulum
Identify the pivot point in the hip - CORRECT ANSWER - Center of the femoral head
Neck resection level is commonly - CORRECT ANSWER - 1-2cm above lesser troch
The Dorr bone classification for type C is described as - CORRECT ANSWER - stovepipe
The market share in the US for cemented total hip replacement is - CORRECT
ANSWER - 10%
T/F: A concern with cylindrical distal fitting stems is proximal stress shield - CORRECT
ANSWER - True
Metal on metal implants fell out of favorite because - CORRECT ANSWER - Metal wear
debris, metalosis, high revision rates with DePuy ASR
Wolff's law is decribed as - CORRECT ANSWER - the reaction to bone load
, Cement disease is the breakdown of the cement mantle causing particle osteolysis - CORRECT
ANSWER - True
The labrum is - CORRECT ANSWER - The fibrous cartilage on the rim of the acetabulum
The neck length is measured - CORRECT ANSWER - From the neck resection to the
center of the head
Pre-op templated is important to assess - CORRECT ANSWER - Implant size, femoral
head pivot point, neck angle, femoral offset, neck resection
Normal placement of the acetaular shell is - CORRECT ANSWER - Abducted 40-45
degrees
Short stems provide what advantage - CORRECT ANSWER - Fit against calcar bone, ease
of implantation in MIS surgery, retains more femoral neck, loads metaphysis effectively
Hip joint laxity can cause - CORRECT ANSWER - Dislocation
One shortcoming to the anterior hip approach is - CORRECT ANSWER - expensive
operating table
The main advantage dual mobility cup is - CORRECT ANSWER - stability and less
chance of dislocation
How can a surgeon correct leg length discrepancies, intra-operatively? - CORRECT
ANSWER - change head length or neck angle
Anterior hip approach had become popular because - CORRECT ANSWER - no muscles
are cut or released, good operative view of the acetabulum, patients generally recover quicker
Questions and CORRECT Answers
Avascular necrosis is best described as... - CORRECT ANSWER - Interruption of blood
supply leading to bone death
Sir John Charnley is credited as the father of modern joint athroplasty. Name 2 products he
introduced that made hip replacement reproducible - CORRECT ANSWER - Polyethelene
and bone cement
What is a socket of the hip called? - CORRECT ANSWER - Acetabulum
Identify the pivot point in the hip - CORRECT ANSWER - Center of the femoral head
Neck resection level is commonly - CORRECT ANSWER - 1-2cm above lesser troch
The Dorr bone classification for type C is described as - CORRECT ANSWER - stovepipe
The market share in the US for cemented total hip replacement is - CORRECT
ANSWER - 10%
T/F: A concern with cylindrical distal fitting stems is proximal stress shield - CORRECT
ANSWER - True
Metal on metal implants fell out of favorite because - CORRECT ANSWER - Metal wear
debris, metalosis, high revision rates with DePuy ASR
Wolff's law is decribed as - CORRECT ANSWER - the reaction to bone load
, Cement disease is the breakdown of the cement mantle causing particle osteolysis - CORRECT
ANSWER - True
The labrum is - CORRECT ANSWER - The fibrous cartilage on the rim of the acetabulum
The neck length is measured - CORRECT ANSWER - From the neck resection to the
center of the head
Pre-op templated is important to assess - CORRECT ANSWER - Implant size, femoral
head pivot point, neck angle, femoral offset, neck resection
Normal placement of the acetaular shell is - CORRECT ANSWER - Abducted 40-45
degrees
Short stems provide what advantage - CORRECT ANSWER - Fit against calcar bone, ease
of implantation in MIS surgery, retains more femoral neck, loads metaphysis effectively
Hip joint laxity can cause - CORRECT ANSWER - Dislocation
One shortcoming to the anterior hip approach is - CORRECT ANSWER - expensive
operating table
The main advantage dual mobility cup is - CORRECT ANSWER - stability and less
chance of dislocation
How can a surgeon correct leg length discrepancies, intra-operatively? - CORRECT
ANSWER - change head length or neck angle
Anterior hip approach had become popular because - CORRECT ANSWER - no muscles
are cut or released, good operative view of the acetabulum, patients generally recover quicker
