Early Clinical Outcomes of a New Cementless Total Knee Arthroplasty Design

Cementless fixation design failures led to low use of this alternative technology. A cementless total knee arthroplasty addressed these design flaws. The single radius knee design incorporated additive manufacturing to produce the tibial and patellar implants. Both implants have enhanced porous subs...

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Published inOrthopedics (Thorofare, N.J.) Vol. 41; no. 6; pp. e765 - 771
Main Authors Cohen, Russell G, Sherman, Nathan C, James, Sheridan L
Format Journal Article
LanguageEnglish
Published United States SLACK INCORPORATED 01.11.2018
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Abstract Cementless fixation design failures led to low use of this alternative technology. A cementless total knee arthroplasty addressed these design flaws. The single radius knee design incorporated additive manufacturing to produce the tibial and patellar implants. Both implants have enhanced porous substrates, optimizing initial bony ingrowth. A nonrandomized prospective review was conducted of 72 cementless knees followed for a minimum of 2 years (mean, 37 months). Surgical time, estimated blood loss, and range of motion at 6 weeks were compared with those of a matched cohort of 70 cemented knees performed by the same surgeon. Knee Society Score and Oxford Knee Score were recorded for the cementless group. Radiographs were evaluated for change in implant position, subsidence, and radiolucent and sclerotic lines. Operative time was statistically shorter in the cementless group (40 vs 45 minutes), but there was no significant difference in postoperative estimated blood loss (557 vs 355 mL). Range of motion at 6 weeks averaged 118° in the cementless group vs 114° in the cemented group. Knee Society Score improved from 53.9 preoperatively to 85.0 at 6 weeks and 91.6 at most recent follow-up. Oxford Knee Score improved from 23.9 preoperatively to 31.7 at 6 weeks and 43.4 at most recent follow-up. No implants aseptically loosened or migrated. There were 2 early infections in the cemented group requiring revision. This cementless total knee arthroplasty revealed excellent clinical results at 3-year follow-up and resulted in shortened operative times. Biologic fixation was achieved in 100% of patients with improved functional and objective scores. Early results are encouraging, and this cementless total knee arthroplasty appears to provide an excellent alternative to cemented total knee arthroplasty. [Orthopedics. 2018; 41(6):e765-e771.].
AbstractList Cementless fixation design failures led to low use of this alternative technology. A cementless total knee arthroplasty addressed these design flaws. The single radius knee design incorporated additive manufacturing to produce the tibial and patellar implants. Both implants have enhanced porous substrates, optimizing initial bony ingrowth. A nonrandomized prospective review was conducted of 72 cementless knees followed for a minimum of 2 years (mean, 37 months). Surgical time, estimated blood loss, and range of motion at 6 weeks were compared with those of a matched cohort of 70 cemented knees performed by the same surgeon. Knee Society Score and Oxford Knee Score were recorded for the cementless group. Radiographs were evaluated for change in implant position, subsidence, and radiolucent and sclerotic lines. Operative time was statistically shorter in the cementless group (40 vs 45 minutes), but there was no significant difference in postoperative estimated blood loss (557 vs 355 mL). Range of motion at 6 weeks averaged 118° in the cementless group vs 114° in the cemented group. Knee Society Score improved from 53.9 preoperatively to 85.0 at 6 weeks and 91.6 at most recent follow-up. Oxford Knee Score improved from 23.9 preoperatively to 31.7 at 6 weeks and 43.4 at most recent follow-up. No implants aseptically loosened or migrated. There were 2 early infections in the cemented group requiring revision. This cementless total knee arthroplasty revealed excellent clinical results at 3-year follow-up and resulted in shortened operative times. Biologic fixation was achieved in 100% of patients with improved functional and objective scores. Early results are encouraging, and this cementless total knee arthroplasty appears to provide an excellent alternative to cemented total knee arthroplasty. [Orthopedics. 2018; 41(6):e765-e771.].
Cementless fixation design failures led to low use of this alternative technology. A cementless total knee arthroplasty addressed these design flaws. The single radius knee design incorporated additive manufacturing to produce the tibial and patellar implants. Both implants have enhanced porous substrates, optimizing initial bony ingrowth. A nonrandomized prospective review was conducted of 72 cementless knees followed for a minimum of 2 years (mean, 37 months). Surgical time, estimated blood loss, and range of motion at 6 weeks were compared with those of a matched cohort of 70 cemented knees performed by the same surgeon. Knee Society Score and Oxford Knee Score were recorded for the cementless group. Radiographs were evaluated for change in implant position, subsidence, and radiolucent and sclerotic lines. Operative time was statistically shorter in the cementless group (40 vs 45 minutes), but there was no significant difference in postoperative estimated blood loss (557 vs 355 mL). Range of motion at 6 weeks averaged 118° in the cementless group vs 114° in the cemented group. Knee Society Score improved from 53.9 preoperatively to 85.0 at 6 weeks and 91.6 at most recent follow-up. Oxford Knee Score improved from 23.9 preoperatively to 31.7 at 6 weeks and 43.4 at most recent follow-up. No implants aseptically loosened or migrated. There were 2 early infections in the cemented group requiring revision. This cementless total knee arthroplasty revealed excellent clinical results at 3-year follow-up and resulted in shortened operative times. Biologic fixation was achieved in 100% of patients with improved functional and objective scores. Early results are encouraging, and this cementless total knee arthroplasty appears to provide an excellent alternative to cemented total knee arthroplasty. [ Orthopedics . 2018; 41(6):e765–e771.]
Author Sherman, Nathan C
James, Sheridan L
Cohen, Russell G
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Snippet Cementless fixation design failures led to low use of this alternative technology. A cementless total knee arthroplasty addressed these design flaws. The...
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StartPage e765
SubjectTerms Adult
Aged
Arthroplasty, Replacement, Knee - adverse effects
Arthroplasty, Replacement, Knee - instrumentation
Arthroplasty, Replacement, Knee - methods
Blood Loss, Surgical
Body mass index
Bone Cements - therapeutic use
Cement
Clinical outcomes
Female
Follow-Up Studies
Humans
Hydroxyapatite
Joint surgery
Knee
Knee Joint - diagnostic imaging
Knee Joint - physiopathology
Knee Joint - surgery
Knee Prosthesis
Male
Middle Aged
Operative Time
Patients
Polyethylene
Postoperative Period
Prosthesis Design
Radiography
Range of Motion, Articular
Retrospective Studies
Surgeons
Transplants & implants
Treatment Outcome
Triathlon
Title Early Clinical Outcomes of a New Cementless Total Knee Arthroplasty Design
URI https://www.ncbi.nlm.nih.gov/pubmed/30168838
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