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International orthopaedics
04, 2022;46 (4): 797-804.

Cohort analysis of two thousand nine hundred forty-three Link Lubinus SP II cemented total hip arthroplasties from a single hospital with surgeon stratification and twenty six thousand, nine hundred and eighty one component-years of follow-up.

Luka Kropivšek, Samo Roškar, Lenart Andrej Zore, Vane Antolič, Blaž Mavčič
Author Information
  1. Luka Kropivšek: Faculty of Medicine, University of Ljubljana, Zaloška 9, 1000, Ljubljana, Slovenia.
  2. Samo Roškar: Faculty of Medicine, University of Ljubljana, Zaloška 9, 1000, Ljubljana, Slovenia.
  3. Lenart Andrej Zore: Faculty of Medicine, University of Ljubljana, Zaloška 9, 1000, Ljubljana, Slovenia.
  4. Vane Antolič: Faculty of Medicine, University of Ljubljana, Zaloška 9, 1000, Ljubljana, Slovenia.
  5. Blaž Mavčič: Faculty of Medicine, University of Ljubljana, Zaloška 9, 1000, Ljubljana, Slovenia. blaz.mavcic@kclj.si. ORCID
PMID: 35076769 DOI: 10.1007/s00264-022-05315-2

Abstract

PURPOSE: Cemented total hip endoprosthesis Link Lubinus SP II has been used for decades with very good results in arthroplasty registries, but surgeon-stratified reports of endoprosthetic survival are very rare. The aim of the presented single hospital cohort analysis of this implant was to determine Link Lubinus SP II survival rates 10/15/20/25/30 years after the primary implantation and to find out whether endoprosthesis survival depended on patients' age, gender, operated side, implanted femoral head diameter, and the operating surgeon.
METHODS: The study included 2943 consecutive primary Link Lubinus SP II hip endoprostheses implanted at the University Medical Centre Ljubljana, Department of Orthopaedic Surgery (Ljubljana, Slovenia) between January 1, 1985, and December 31, 2018. Kaplan-Meier analysis and Cox regression were performed after minimum two and maximum 30 years of follow-up.
RESULTS: At 10/15/20/25/30 years after implantation, the estimated cumulative proportion of revision-free surviving Link Lubinus SP II total hip endoprostheses was 94/90/88/87/87% and the cumulative proportion with unremoved endoprosthetic components was 96/93/90/89/89%, respectively. Higher patient's age at operation was associated with lower risk of subsequent implant removal (hazard ratio 0.97 for each additional year of age; 95% confidence interval 0.95-0.99; p = 0.00), while the patient's gender, the implanted femoral head diameter, and the operating surgeon had no significant impact on implant survival.
CONCLUSION: The study presents the largest published Link Lubinus SP II total hip arthroplasty cohort from a single non-developmental hospital with 26,981 component-years of observation. The findings highlight excellent outcomes of this implant in the elderly population, regardless of performance variability between surgeons.

Keywords

Cemented hip endoprosthesis Link Lubinus SP II Survival rates Total hip arthroplasty

References

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MeSH Term

Aged
Arthroplasty, Replacement, Hip
Cohort Studies
Follow-Up Studies
Hip Prosthesis
Hospitals
Humans
Prosthesis Design
Prosthesis Failure
Reoperation
Surgeons
Journal Article

Word Cloud

Created with Highcharts 10.0.0hipLinkLubinusSPIItotalsurvivalimplantendoprosthesisarthroplastysinglehospitalanalysisageimplantedsurgeonCementedendoprostheticcohortrates10/15/20/25/30 yearsprimaryimplantationgenderfemoralheaddiameteroperatingstudyendoprosthesesLjubljanatwofollow-upcumulativeproportionpatient's0component-yearsthousandninehundredPURPOSE:useddecadesgoodresultsregistriessurgeon-stratifiedreportsrareaimpresenteddeterminefindwhetherdependedpatients'operatedsideMETHODS:included2943consecutiveUniversityMedicalCentreDepartmentOrthopaedicSurgerySloveniaJanuary11985December312018Kaplan-MeierCoxregressionperformedminimummaximum30 yearsRESULTS:estimatedrevision-freesurviving94/90/88/87/87%unremovedcomponents96/93/90/89/89%respectivelyHigheroperationassociatedlowerrisksubsequentremovalhazardratio97additionalyear95%confidenceinterval95-099p = 000significantimpactCONCLUSION:presentslargestpublishednon-developmental26981observationfindingshighlightexcellentoutcomeselderlypopulationregardlessperformancevariabilitysurgeonsCohortforty-threecementedarthroplastiesstratificationtwentysixeightyoneSurvivalTotal

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