Mjerenje stabilnosti acetabularne komponente totalne endoproteze kuka ovisno o veličini učinjenoga defekta dna acetabuluma na modelu svinjske zdjelice [Measurement of acetabular component stability in total hip arthroplasty in correlation to the size of acetabular medial wall defect in pig pelvis model]
2017
INTRODUCTION: Cotyloplasty is a technique that involves making a perforation of the
medial wall of a shallow acetabulum and then inserting an acetabular cup with the medial
aspect of it’s dome beyond the Kohler’s line. Although this method is in use since 1976., so
far no one has not defined how much cotyloplasty can be performed to remain acetabular
component stablity.
OBJECTIVES: Measurement acetabular component stability depending on the diameter of
cotyloplasty.
MATERIALS AND METHODS: On the 24 pigs pelvis models iatrogenic medial wall defect
in different diameters (10,20,25,30mm) is made following with acetabular component
placement (size 44). Acetabulum was loaded for determining to which diameter of
cotyloplasty acetabular component remains stable, or at which point the remaining medial
wall of the acetabulum can´t withstand the load and acetabular cup moves through the pelvis
for more than 2 mm or breaks through acetabulum.
RESULTS: In our study we found that in the average person (weighing 70 kg), we can make
acetabular defect that is between 25 and 30 mm if we use the acetabular component size 44.
If it is a person with higher body weight, up to 100 kg, this defect should not exceed the
diameter of 25 mm.
CONCLUSION: For the first time maximal diameter of cotyloplasty which ensures the
primary stability of acetabular component is determed. We confirmed our hypothesis that
THA will have sufficient stability to ensure secondary bone ingrowth around it, if amount of
cotyloplasty does not exceed half of the acetabular component diameter. This information will
help orthopedic surgeons in preoperative planning of total hip arthroplasty and postoperative
rehabilitation in patients with hip dysplasia.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
0
References
0
Citations
NaN
KQI