Midterm results of the Synergy cementless tapered stem: stress shielding and bone quality

Nishino, Tomofumi; Mishima, Hajime; Miyakawa, Syumpei; Kawamura, Haruo; Ochiai, Naoyuki

doi:10.1007/s00776-008-1272-0

Cited by 25 publications

(16 citation statements)

References 17 publications

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“…However, the most challenging issue is the stress shielding effect that can manifest in the proximal fit stem. Nishino et al 5) found that even with proximally fixed type stems, severe stress shielding occurred because of distal fixation. Engh et al 15) reported that stress shielding itself does not strongly affect the long-term results of THA, while Noble et al 16) found that the range and degree of stress shielding augmented during the postoperative course.…”

Section: Discussionmentioning

confidence: 99%

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Primary Total Hip Arthroplasty Using Summit^® Stems in Korean: Minimum Four-year Follow-up

2017

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PurposeThe aim of this study was to assess the mid-term results of primary cementless total hip arthroplasty (THA) using Summit® stems.Materials and MethodsOne hundred twenty-eight arthroplasties in 121 patients who were performed THA from December 2004 to March 2013, were reviewed retrospectively a minimum of 4 years follow-up (mean age, 60.3 years; mean postoperative follow up period, 86.3 months). For a clinical evaluation, the Harris hip score (HHS) was used to assess outcome. Radiographic evaluation was done through spot welds, subsidence, stress shielding, canal filling.ResultsThe mean HHS was 69.8 points preoperatively, and it improved significantly to 96.3 points at the final follow-up. Postoperatively, 10 patients experienced thigh pain and 7 patients showed a moderate limping gait. There was not only early stem subsidence but there was no more subsidence at last follow up. One hundred eighteen hips showed radiographic signs of stem bone ingrowth, and 10 hips showed fibrous ingrowth at the last follow-up. Stress shielding occurred in 85 hips and third degree stress shielding was observed in 6 hips. Complication arose in 10 hips due to dislocation. Although revisions due to recurrent dislocations led to acetabular component revision in one hip, no revisions arose due to isolated aseptic loosening of the femoral component.ConclusionThe clinical and radiological mid-term results of primary THA using Summit® stems revealed solid initial fixation and bone ingrowth stable fixation. Considering the satisfactory clinical results, Summit® stems may be a good treatment option in Korean patients who were required hip arthroplasty

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Section: Discussionmentioning

confidence: 99%

“…For a clinical evaluation, using HHS, as well as interpret complications during and after surgery in all patients 5) . Radiographic evaluation was done through comparison between immediate postoperative radiographs and last follow-up radiographs.…”

Section: Methodsmentioning

confidence: 99%

Primary Total Hip Arthroplasty Using Summit^® Stems in Korean: Minimum Four-year Follow-up

2017

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“…However, most likely, there will be ARMD problems related to ASR LDH MoM THA surgery as well. The mid-term survival of the cementless Synergy stem has been 100% for average follow-up of 75 months (23). The results of the BHR cup have been published mainly when using the BHR as a hip resurfacing device.…”

Section: Discussionmentioning

confidence: 99%

Cementless Total Hip Arthroplasty with Large Diameter Metal-on-Metal Heads: Short-Term Survivorship of 8059 Hips from the Finnish Arthroplasty Register

et al. 2013

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“…Femoral bone loss or resorption, so-called stress shielding, around well-fixed femoral components is thought to occur around most, if not all, stem designs [12,32,34,38]. This phenomenon is reportedly exacerbated with fully coated stems [12,15,18].…”

Section: Introductionmentioning

confidence: 99%

Proximally Versus Fully Porous-coated Femoral Stems: A Multicenter Randomized Trial

MacDonald

Rosenzweig

Guerin

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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There are two broad-based categories of cementless femoral component designs: proximally porouscoated and fully porous-coated. While both have been widely used, there remains debate regarding differences in clinical outcome scores, relative incidence of thigh pain, and development of stress shielding. We investigated these variables in a multicenter prospective randomized blinded clinical trial of 388 patients from three centers: 198 patients had a proximally porous-coated tapered cementless femoral component and 190 patients had a fully porous-coated cementless femoral component. A minimum followup of 2 years (mean, 6.7 years; range, 2.0-8.65 years) was available in 367 of the 388 patients (95%).

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Midterm results of the Synergy cementless tapered stem: stress shielding and bone quality

Cited by 25 publications

References 17 publications

Primary Total Hip Arthroplasty Using Summit^® Stems in Korean: Minimum Four-year Follow-up

Primary Total Hip Arthroplasty Using Summit^® Stems in Korean: Minimum Four-year Follow-up

Cementless Total Hip Arthroplasty with Large Diameter Metal-on-Metal Heads: Short-Term Survivorship of 8059 Hips from the Finnish Arthroplasty Register

Proximally Versus Fully Porous-coated Femoral Stems: A Multicenter Randomized Trial

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Midterm results of the Synergy cementless tapered stem: stress shielding and bone quality

Cited by 25 publications

References 17 publications

Primary Total Hip Arthroplasty Using Summit® Stems in Korean: Minimum Four-year Follow-up

Primary Total Hip Arthroplasty Using Summit® Stems in Korean: Minimum Four-year Follow-up

Cementless Total Hip Arthroplasty with Large Diameter Metal-on-Metal Heads: Short-Term Survivorship of 8059 Hips from the Finnish Arthroplasty Register

Proximally Versus Fully Porous-coated Femoral Stems: A Multicenter Randomized Trial

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Primary Total Hip Arthroplasty Using Summit^® Stems in Korean: Minimum Four-year Follow-up

Primary Total Hip Arthroplasty Using Summit^® Stems in Korean: Minimum Four-year Follow-up