Limits...
Long-term survivorship of a medial-pivot total knee system compared with other cemented designs in an arthroplasty registry.

Bordini B, Ancarani C, Fitch DA - J Orthop Surg Res (2016)

Bottom Line: Survivorship also exceeded that of all other cemented TKAs (95.7 %) in the same registry, but the difference was not significantly different.The subject system was associated with survivorship that exceeds the NICE guidelines at 10 years and is similar to that of other cemented TKA systems.The use of this unique tibial insert design does not negatively impact component survivorship.

View Article: PubMed Central - PubMed

Affiliation: Istituto Ortopedico Rizzoli, Bologna, Italy.

ABSTRACT

Background: The Orthopaedic Data Evaluation Panel (ODEP) monitors the performance of primary total knee arthroplasty (TKA) implants against guidance provided by the National Institute for Health and Care Excellence (NICE) and issues ratings based upon survivorship data meeting or exceeding 95 % at 10-year follow-up. The objectives of the current study were to determine if the survivorship for the ADVANCE Medial-Pivot System in an arthroplasty registry exceeds this threshold and if its survivorship is significantly different than that of all other cemented bi-, tricompartmental, minimally stabilized, and fixed bearing TKAs in the same registry.

Methods: The database of an arthroplasty registry was searched for all TKAs performed with the subject system and all other cemented TKAs. The Kaplan-Meier survivorship for the subject system was compared to the NICE criteria and also that of all other cemented TKAs. Complication modes were also examined for the two groups.

Results: The 10-year survivorship for the included 506 TKAs using the subject system (96.3 %) exceeded the NICE guidelines of 95 % at 10 years. Survivorship also exceeded that of all other cemented TKAs (95.7 %) in the same registry, but the difference was not significantly different.

Conclusions: The subject system was associated with survivorship that exceeds the NICE guidelines at 10 years and is similar to that of other cemented TKA systems. The use of this unique tibial insert design does not negatively impact component survivorship.

No MeSH data available.


Survivorship estimates for the ADVANCE (blue line) and the All Cemented TKAs (red lines) are shown with their associated 95 % confidence intervals
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
getmorefigures.php?uid=PMC4837619&req=5

Fig1: Survivorship estimates for the ADVANCE (blue line) and the All Cemented TKAs (red lines) are shown with their associated 95 % confidence intervals

Mentions: The Kaplan-Meier survivorship estimate at 10 years was 96.3 % (95 % CI, 94.5–98.1) for the ADVANCE group (Table 2). In this table, N at Risk refers to the number of TKAs that were available at the beginning of each year interval. This was higher than the 10-year rate of 95.7 % (95 % CI, 95.3–96.2) for the All Other Cemented TKAs group (Table 3), but the difference was not statistically significant (Fig. 1). There were 16 (3.1 %) revisions in the ADVANCE group: 9 for aseptic loosening where both the tibial and femoral components were revised; 5 for septic loosening; and 2 for aseptic loosening where only the tibial component was revised (Table 4). The adjusted risk of revision was not significantly different for the ADVANCE and All Other Cemented TKAs groups. (p = 0.662). Results of the Cox regression analysis showed age at the time of surgery was the only variable influencing the risk of revision for any cause, with the risk of revision decreasing as the age at the time of surgery increased.Table 2


Long-term survivorship of a medial-pivot total knee system compared with other cemented designs in an arthroplasty registry.

Bordini B, Ancarani C, Fitch DA - J Orthop Surg Res (2016)

Survivorship estimates for the ADVANCE (blue line) and the All Cemented TKAs (red lines) are shown with their associated 95 % confidence intervals
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4837619&req=5

Fig1: Survivorship estimates for the ADVANCE (blue line) and the All Cemented TKAs (red lines) are shown with their associated 95 % confidence intervals
Mentions: The Kaplan-Meier survivorship estimate at 10 years was 96.3 % (95 % CI, 94.5–98.1) for the ADVANCE group (Table 2). In this table, N at Risk refers to the number of TKAs that were available at the beginning of each year interval. This was higher than the 10-year rate of 95.7 % (95 % CI, 95.3–96.2) for the All Other Cemented TKAs group (Table 3), but the difference was not statistically significant (Fig. 1). There were 16 (3.1 %) revisions in the ADVANCE group: 9 for aseptic loosening where both the tibial and femoral components were revised; 5 for septic loosening; and 2 for aseptic loosening where only the tibial component was revised (Table 4). The adjusted risk of revision was not significantly different for the ADVANCE and All Other Cemented TKAs groups. (p = 0.662). Results of the Cox regression analysis showed age at the time of surgery was the only variable influencing the risk of revision for any cause, with the risk of revision decreasing as the age at the time of surgery increased.Table 2

Bottom Line: Survivorship also exceeded that of all other cemented TKAs (95.7 %) in the same registry, but the difference was not significantly different.The subject system was associated with survivorship that exceeds the NICE guidelines at 10 years and is similar to that of other cemented TKA systems.The use of this unique tibial insert design does not negatively impact component survivorship.

View Article: PubMed Central - PubMed

Affiliation: Istituto Ortopedico Rizzoli, Bologna, Italy.

ABSTRACT

Background: The Orthopaedic Data Evaluation Panel (ODEP) monitors the performance of primary total knee arthroplasty (TKA) implants against guidance provided by the National Institute for Health and Care Excellence (NICE) and issues ratings based upon survivorship data meeting or exceeding 95 % at 10-year follow-up. The objectives of the current study were to determine if the survivorship for the ADVANCE Medial-Pivot System in an arthroplasty registry exceeds this threshold and if its survivorship is significantly different than that of all other cemented bi-, tricompartmental, minimally stabilized, and fixed bearing TKAs in the same registry.

Methods: The database of an arthroplasty registry was searched for all TKAs performed with the subject system and all other cemented TKAs. The Kaplan-Meier survivorship for the subject system was compared to the NICE criteria and also that of all other cemented TKAs. Complication modes were also examined for the two groups.

Results: The 10-year survivorship for the included 506 TKAs using the subject system (96.3 %) exceeded the NICE guidelines of 95 % at 10 years. Survivorship also exceeded that of all other cemented TKAs (95.7 %) in the same registry, but the difference was not significantly different.

Conclusions: The subject system was associated with survivorship that exceeds the NICE guidelines at 10 years and is similar to that of other cemented TKA systems. The use of this unique tibial insert design does not negatively impact component survivorship.

No MeSH data available.