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Mid-term survival of the Optimys short stem: A prospective case series of 500 patients

World Journal of Orthopedics 2024年第3期15卷 257-265页

作者： Bryan Hamans sheryl de waard Sjoerd Kaarsemaker Esther R C Janssen Inger N Sierevelt Gino M M J Kerkhoffs Daniël Haverkamp department of Orthopaedic Surgery Xpert ClinicAmsterdam 1101EANetherlands department of Orthopedic Surgery Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Esther R C Janssen Department of Orthopaedic SurgeryViecuri Medisch CentrumVenlo 5912 BLNetherlands Centre for Orthopaedic Research Spaarne ZiekenhuisHoofddorp 2134 TMNetherlands department of Orthopaedic Surgery and Sports Medicine Amsterdam UMC-Location AMCAmsterdam 1105 AZNetherlands department of Orthopedic Surgery Xpert Orthopedic Surgery ClinicAmsterdam 1101 EANetherlands

BACKGROUND In recent years,there has been an increase in the number of total hip arthroplasty procedures in the younger patient *** active group has higher expectations of their prosthesis in comparison to the older population,and there is a greater physical demand for the *** femoral stems were in-troduced to retain proximal bone stock and joint biomechanics and became more common to implant in this specific ***,the long-term survival and functional outcomes of various short stems are still being investigated in different *** To determine the 5-year survival of the Optimys hip *** This was a prospective multicenter cohort study of 500 patients conducted in two hospitals in the *** patients received the Optimys short stem(Mathys Ltd,Bettlach,Switzerland).The primary outcome measure was survival of the hip stem,with revision as the *** secondary outcome measurements included patient-reported outcome measures(PROMs).Kaplan-Meier analysis was used to calculate the 5-year survival ***-minus-log transformation was performed to calculate the 95%confidence interval(95%CI).Mixed model analyses were performed to assess the course of the PROMs during the 1st 2 years after *** were modeled separately for the 1st and 2nd years to calculate the yearly change in PROMs during both follow-up periods with accompanying 95%*** The mean age of the total 500 patients was 62.3 years(standard deviation:10.6)and 202 were male(40%).At a median follow-up of 5.5 years(interquartile range:4.5-6.7),7 patients were deceased and 6 revisions were registered,for infection(n=3),subsidence(n=2)and malposition(n=1).This resulted in an overall 5-year survival of 98.8%(95%CI:97.3-99.5).If infection was left out as reason for revision,a stem survival of 99.4%(95%CI:98.1-99.8)was *** questionnaires were completed by 471 patients(94%),317 patients(63%)completed the 1-year follow-up questionna

关键词： Total hip arthroplasty Femoral stem Short stem Optimys Survival 5-year survival Revision PROMs

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Femoroacetabular offset restoration in total hip arthroplasty;Digital templating a short stem vs a conventional stem

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World Journal of Orthopedics 2022年第2期13卷 139-149页

作者： sheryl de waard Tom Verboom Niels Hendrik Bech Inger N Sierevelt Gino M Kerkhoffs Daniël Haverkamp Orthopedic Surgery Xpert Orthopedie AmsterdamAmsterdam 1101 EANetherlands Orthopaedic Surgery Academic Medical CentreAmsterdam 1105 AZNetherlands

BACKGROUND Failure in restoring individual anatomy could be a reason for persistent functional limitations post total hip *** offset(FAO)plays an important role in anatomic restoration,as loss of offset≥5 mm is associated with altered gait and decreased functional *** assessment by use of digital templating has shown to be a reliable method for sizing the components in total hip arthroplasty,and can show if anatomic restoration is *** recent years,short stems are growing in popularity as it could allow better restoration due to more variety in *** To assess whether restoration of the FAO differs between a short or a conventional stem by use of digital ***,association of the preoperative offset and caput-colllum-diaphyseal angle(CCD-angle)within restoration of both stems was investigated,and the reliability of measurements was *** A total of 100 standardized hip radiographs were used for digital *** of FAO was classified into“restored”or“not restored”,when adel to account for paired *** determination of the optimal point under the curve in operating curve-analysis,bootstrapping of thousand sets was performed to determine the optimal cutoff point of the preoperative FAO for restoration within the limits of 5 *** observers participated for inter-observer reliability,with two observers measuring the radiographs twice for intra-observer *** The mean preoperative FAO was 79.7 mm(range 62.5-113 mm),with a mean CCD-angle of 128.6°(range 114.5°-145°).The conventional stem could only r

关键词： Offset Anatomic offset restoration Total hip arthroplasty Short hip stem Conventional hip stem

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Integrity of the hip capsule measured with magnetic resonance imaging after capsular repair or unrepaired capsulotomy in hip arthroscopy

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World Journal of Orthopedics 2022年第4期13卷 400-407页

作者： Niels H Bech Lode A van Dijk sheryl de waard Gwendolyn Vuurberg Inger N Sierevelt Gino MMJ Kerkhoffs Daniël Haverkamp department of Orthopedic Surgery Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands department of Orthopedic Surgery Xpert Orthopedic Surgery ClinicAmsterdam 1101 EANetherlands department of Orthopedic Surgery Tergooi ZiekenhuisHilversum 1213 XZNetherlands department of Radiology and Nuclear Medicine Rijnstate HospitalArnhem 6815 ADNetherlands department of Radiology and Nuclear Medicine Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Centre for Orthopaedic Research Spaarne ZiekenhuisHoofddorp 2134 TMNetherlands Academic Center for Evidence-Based Sports Medicine Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Amsterdam Collaboration on Health and Safety in Sports Amsterdam UMC/IOC Research CenterAmsterdam 1105 AZNetherlands

BACKGROUND Current literature shows no clear answer on the question how to manage the capsule after hip *** patient reported outcome measures there seems to be no difference between capsular repair or unrepaired *** To evaluate and compare the integrity of the hip capsule measured on a magnetic resonance imaging(MRI)scan after capsular repair or unrepaired *** A case series study was performed;a random sample of patients included in a trial comparing capsular repair vs unrepaired capsulotomy had a postoperative MRI *** presence of a capsular defect and gap size were independently evaluated on *** A total of 28 patients(29 hips)were *** demographics were comparable between treatment *** were 2 capsular defects in the capsular repair group and 7 capsular defects in the unrepaired capsulotomy group(P=0.13).In the group of patients with a defect,median gap sizes at the acetabular side were 5.9 mm(range:2.7-9.0)in the repaired and 8.0 mm(range:4.5-18.0)in the unrepaired group(P=0.462).At the muscular side gap sizes were 6.6 mm(range:4.1-9.0)in the repaired group and 11.5 mm(range:3.0-18.0)in the unrepaired group(P=0.857).The calculated Odds ratio(OR)for having a capsular defect with an increasing lateral center-edge(CE)angle was 1.12(P=0.06).The OR for having a capsular defect is lower in the group of patients that underwent a labral repair with an OR of 0.1(P=0.05).CONCLUSION There is no significant difference in capsular defects between capsular repair or unrepaired *** clinical characteristics our case series shows that a larger CE angle increases the likelihood of a capsular defect and the presence of a labral repair decreases the likelihood of a capsular defect.

关键词： Hip Arthroscopy Magnetic resonance imaging Capsule Thickness

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