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Debate«FOR/AGAINST»
Cemented vs uncemented fixation in total hip replacement
Anna Terentjeva RSU MF IVVlada Meļņikova RSU MF IV
Riga, 2016
Cemented fixation technique in total hip replacement (THR)(1)
http://www.jointreplacementvizag.com/images/home/joint-replacement-services/total-hip-replacement-vizag.jpg
Cemented fixation technique in THR(2)• Cemented fixation uses an acrylic
polymer (PMMA) • Both the bone and the cement must
lock together in order to make the insertion last. • Bone cement is not glue and it doesn’t
stick to anything. • Cement simply acts as a filler between
the bone and the implant.
http://www.eorthopod.com/images/ContentImages/hip/hip_arthroplasty/hip_arthroplasty_cemented01.jpg
1 http://bonesmart.org/hip/types-of-total-hip-implants/
Uncemented fixation
• Stems are rough (tetanum, cobalt-chromium alloy)
• Cups are made from metal alloy with rough outer part
• Cementless implants are covered with porous or hydroxyapatite covering• The maximum bone
ingrowth capability is obtained with the pore size 100–200 µm
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2779384/
http://eorthopod.com/hip-replacement/
Uncemented fixation
technique in THR
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2779384/ http://www.healthpages.org/surgical-care/hip-joint-replacement-surgery/
Cemented fixation in THR
1. Is more suitable for obese patients
https://www.ncbi.nlm.nih.gov/pubmed/20720138/
http://www.wjgnet.com/2218-5836/full/v5/i5/591.htm
Uncemented fixation in THR
1. Revision rate is lower within ten years after operation
Cemented fixation in THR
2. Has a better outcome in case of
displastic hip
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662257/
Uncemented fixation in THR
https://www.ncbi.nlm.nih.gov/pubmed/3818732
2. Risk for femoral loosening is low
It has been implied that once stable fixation occurs in the cementless implant, it does not deteriorate with time.
Cemented fixation in THR3. Is better for the patients with osteoporosis
https://www.ncbi.nlm.nih.gov/pubmed/25850905
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662257/
Uncemented fixation in THR
3. Osteolysis is not common
Cemented fixation in THR
4. Has a lower risk for intra-operative femur
fractures
https://www.ncbi.nlm.nih.gov/pubmed/27037428
https://www.ncbi.nlm.nih.gov/pubmed/12647048
Uncemented fixation in
THR
4. The incidence of fat embolism during the operation is much lower
Cemented fixation in THR5. Is cheaper than the cementless THR
http://www.amc.lv/index.php?p=6336&lang=634&pp=10469https://www.ncbi.nlm.nih.gov/pubmed/26561859
http://bja.oxfordjournals.org/content/102/1/12.full
Uncemented fixation in THR
5. During the process of cement polimerisation Bone Cement Implantation Syndrome (BCIS) may develop. The uncemented fixation
is free of this complication.
BCIS is characterized by hypoxia, hypotension or both and/or unexpected loss of consciousness in a patient undergoing cemented bone surgery.
Conclusions
• No significant differences between cemented and cementless group in terms of implant survival, patient mortality or the complication rate exist
• Each of these methods should be applied for every patient individual needs
Thank you for your attention!
Discussion