Long-term follow-up of patients undergoing the modified Dunn procedure for slipped capital femoral epiphysis

Aims Our retrospective analysis reports the outcome of patients operated for slipped capital femoral epiphysis using the modified Dunn procedure. Results, complications, and the need for revision surgery are compared with the recent literature. Methods We retrospectively evaluated 17 patients (18 hips) who underwent the modified Dunn procedure for the treatment of slipped capital femoral epiphysis. Outcome measurement included standardized scores. Clinical assessment included ambulation, leg length discrepancy, and hip mobility. Radiographically, the quality of epiphyseal reduction was evaluated using the Southwick and Alpha-angles. Avascular necrosis, heterotopic ossifications, and osteoarthritis were documented at follow-up. Results At a mean follow-up of more than nine years, the mean modified Harris Hip score was 88.7 points, the Hip Disability and Osteoarthritis Outcome Score (HOOS) 87.4 , the Merle d’Aubigné Score 16.5 points, and the UCLA Activity Score 8.4. One patient developed a partial avascular necrosis of the femoral head, and one patient already had an avascular necrosis at the time of delayed diagnosis. Two hips developed osteoarthritic signs at 14 and 16 years after the index operation. Six patients needed a total of nine revision surgeries. One operation was needed for postoperative hip subluxation, one for secondary displacement and implant failure, two for late femoroacetabular impingement, one for femoroacetabular impingement of the opposite hip, and four for implant removal. Conclusion Our series shows good results and is comparable to previous published studies. The modified Dunn procedure allows the anatomic repositioning of the slipped epiphysis. Long-term results with subjective and objective hip function are superior, avascular necrosis and development of osteoarthritis inferior to other reported treatment modalities. Nevertheless, the procedure is technically demanding and revision surgery for secondary femoroacetabular impingement and implant removal are frequent. Cite this article: 2020;1-4:80–87.

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Long-term follow-up of patients undergoing the modified Dunn procedure for slipped capital femoral epiphysis

Bone & Joint Open ◽

10.1302/2046-3758.14.bjo-2020-0010.r1 ◽

2020 ◽

Vol 1 (4) ◽

pp. 80-87

Author(s):

Caroline Passaplan ◽

Lucienne Gautier ◽

Emanuel Gautier

Keyword(s):

Avascular Necrosis ◽

Femoroacetabular Impingement ◽

Revision Surgery ◽

Slipped Capital Femoral Epiphysis ◽

Implant Removal ◽

Long Term Results ◽

Harris Hip Score ◽

Ucla Activity Score

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Results at 10–24 years after single-stage revision arthroplasty of infected total hip arthroplasty in patients under 45 years of age

Hip International ◽

10.1177/1120700019888877 ◽

2019 ◽

pp. 112070001988887 ◽

Cited By ~ 3

Author(s):

Matthias Wolff ◽

Christian Lausmann ◽

Thorsten Gehrke ◽

Akos Zahar ◽

Malte Ohlmeier ◽

...

Keyword(s):

Infection Control ◽

Revision Surgery ◽

Single Stage ◽

Long Term Results ◽

Harris Hip Score ◽

Study Cohort ◽

One Stage ◽

The Mean

Introduction: The management of periprosthetic joint infection (PJI) of the hip is a challenging procedure. One-stage exchange is carried out in specialist centres with comparable infection free survival rates. However, there is a paucity of long-term results of this approach in young patients. Methods: All patients undergoing one-stage exchange due to PJI with a known causative organism ⩽45 years of age with a minimum of 10-year follow-up (mean 15 years; range 10–24 years) were enrolled in this retrospective study. Patients older than 45 years of age or patients with a two-stage procedure were excluded from the study. The primary outcome measure was failure rate with special focus on reinfection at latest follow-up. Failure was defined as revision surgery for infection. Furthermore, functional outcome using the Harris Hip Score was determined initially and at latest follow-up. 26 patients fulfilled the inclusion criteria and were available for final follow-up. Results: The study cohort consists of 16 male and 10 female patients with a mean age of 36.8 years (range 20–45 years) and a mean BMI of 29.8 kg/m2 (range 20.7–40.6 kg/m2). Prior to the single-stage procedure, the patients underwent an average of 3.1 previous surgical interventions (range 1–9). The mean hospital stay after septic revision was 19.7 days (11–33 days). Most infections were caused by Staphylococcus epidermidis ( n = 8, 30.8%), followed by Staph. aureus ( n = 7, 26.9%) and Propionibacterium acnes ( n = 6, 23.1%). At latest follow-up, the overall survival rate was 76.9 %, while infection control could be achieved in 96.2%. At final examination, the mean Harris Hip Score improved from 46.2 to 78.9 (range 18.0–99; SD, 22.6). Conclusions: Single-stage revision surgery for the management of PJI in patients ⩽45 years is a successful treatment option with high infection control, even after long-term follow-up.

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Patients with severe slipped capital femoral epiphysis treated by the modified Dunn procedure have low rates of avascular necrosis, good outcomes, and little osteoarthritis at long-term follow-up

The Bone & Joint Journal ◽

10.1302/0301-620x.101b4.bjj-2018-1303.r1 ◽

2019 ◽

Vol 101-B (4) ◽

pp. 403-414 ◽

Cited By ~ 15

Author(s):

T. D. Lerch ◽

S. Vuilleumier ◽

F. Schmaranzer ◽

K. Ziebarth ◽

S. D. Steppacher ◽

...

Keyword(s):

Femoral Head ◽

Avascular Necrosis ◽

Slipped Capital Femoral Epiphysis ◽

Harris Hip Score ◽

Slip Angle ◽

Functional Scores ◽

Screw Breakage ◽

Long Term Follow Up

AimsThe modified Dunn procedure has the potential to restore the anatomy in hips with severe slipped capital femoral epiphyses (SCFE). However, there is a risk of developing avascular necrosis of the femoral head (AVN). In this paper, we report on clinical outcome, radiological outcome, AVN rate and complications, and the cumulative survivorship at long-term follow-up in patients undergoing the modified Dunn procedure for severe SCFE.Patients and MethodsWe performed a retrospective analysis involving 46 hips in 46 patients treated with a modified Dunn procedure for severe SCFE (slip angle > 60°) between 1999 and 2016. At nine-year-follow-up, 40 hips were available for clinical and radiological examination. Mean preoperative age was 13 years, and 14 hips (30%) presented with unstable slips. Mean preoperative slip angle was 64°. Kaplan–Meier survivorship was calculated.ResultsAt the latest follow-up, the mean Merle d’Aubigné and Postel score was 17 points (14 to 18), mean modified Harris Hip Score was 94 points (66 to 100), and mean Hip Disability and Osteoarthritis Outcome Score was 91 points (67 to 100). Postoperative slip angle was 7° (1° to 16°). One hip (2%) had progression of osteoarthritis (OA). Two hips (5%) developed AVN of the femoral head and required further surgery. Three other hips (7%) underwent implant revision due to screw breakage or change of wires. Cumulative survivorship was 86% at ten-year follow-up.ConclusionThe modified Dunn procedure for severe SCFE resulted in a low rate of AVN, low risk of progression to OA, and high functional scores at long-term follow-up. The slip deformities were mainly corrected but secondary impingement deformities can develop in some hips and may require further surgical treatment. Cite this article: Bone Joint J 2019;101-B:403–414.

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Clinical results of the Metha short hip stem: a perspective for younger patients?

Orthopedic Reviews ◽

10.4081/or.2013.e34 ◽

2013 ◽

Vol 5 (4) ◽

pp. 34 ◽

Cited By ~ 30

Author(s):

Fritz Thorey ◽

Claudia Hoefer ◽

Nima Abdi-Tabari ◽

Matthias Lerch ◽

Stefan Budde ◽

...

Keyword(s):

Bone Ingrowth ◽

Long Term Results ◽

Harris Hip Score ◽

Femoral Revision ◽

Term Survival ◽

Younger Patients ◽

The Mean ◽

Short Stems

In recent years, various uncemented proximal metaphyseal hip stems were introduced for younger patients as a bone preserving strategy. Initial osteodensitometric analyses of the surrounding bone of short stems indicate an increase of bone mass with secondary bone ingrowth fixation as a predictor of long-term survival of these types of implants. We report the outcome of 151 modular Metha short hip stem implants in 148 patients between March 2005 and October 2007. The mean follow-up was 5.8±0.7 years and the mean age of the patients was 55.7±9.8 years. Along with demographic data and co-morbidities, the Harris Hip Score (HHS), the Hip dysfunction and Osteoarthritis Outcome Score (HOOS), and also the results of a patient-administered questionnaire were recorded pre-operatively and at follow-up. The mean HHS increased from 46±17 pre-operatively to 90±5 the HOOS improved from 55±16 pre-operatively to 89±10 at the final follow-up. A total of three patients have been revised, two for subsidence with femoral revision and one for infection without femoral revision (Kaplan Meier survival estimate 98%). The radiological findings showed no radiolucent lines in any of the patients. The modular Metha short hip stem was implanted in younger patients, who reported an overall high level of satisfaction. The clinical and radiographic results give support to the principle of using short stems with metaphyseal anchorage. However, long-term results are necessary to confirm the success of this concept in the years to come.

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Reinforcement Rings for Deficient Acetabular Bone in Revision Surgery: Long-Term Results

Hip International ◽

10.1177/112070009700700206 ◽

1997 ◽

Vol 7 (2) ◽

pp. 57-64 ◽

Cited By ~ 6

Author(s):

E. Garcia-Cimbrelo ◽

J. Alonso-Biarge ◽

J. Cordero-Ampuero

Keyword(s):

Revision Surgery ◽

Clinical Results ◽

Long Term Results ◽

Cumulative Probability ◽

Metal Ring ◽

Kaplan Meier ◽

Medial Migration ◽

Cemented Cup

This study analyzes the long-term results of 23 metal ring supports used in revision surgery since 1979. Only a metallic ring and a cemented cup were used in this series. Bone grafts and cementless cups were excluded from this study. One deep infection was excluded from the follow-up study. In the 22 cases analyzed, the mean follow-up period was 10 years for all cases and 12.2 years for unrevised cases. Bone defects according to the AAOS classification were: Grade 1, 1 case, Grade 2, 1 case, Grade 3, 10 cases, and Grade 4, 10 cases. A Müller ring was indicated in an anterior or medial wall defect (12 cases) and a Burch-Schneider ring was indicated in an anterior or posterior column defect or in pelvic discontinuity (10 cases). The clinical results were good in 8 cases, fair in 8 cases, and poor in 6 cases. Six cases were rerevised or removed, resulting in a total cumulative probability of rerevison or removal of 23.8% after 10 years according to the Kaplan-Meier analysis. Postoperatively, 18 cases had neutral rings, 2 cases had horizontal rings, and 2 cases had vertical rings. Radiological cup migration was found in 12 cases, resulting in a total cumulative probability of migration of 56.8% after 13 years according to the Kaplan-Meier analysis. Changes in the acetabular angle were present in 2 cases, vertical migration in 12 cases, and medial migration in 10 cases. Our data suggest that the metal ring and cemented cup alone could be used for salvage surgery in elderly patients and in low-demand patients. Possibly, adding bone graft could improve these results.

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Five-year results of a cementless short-hip-stem prosthesis

Orthopedic Reviews ◽

10.4081/or.2013.e4 ◽

2013 ◽

Vol 5 (1) ◽

pp. 4 ◽

Cited By ~ 50

Author(s):

Ralf H. Wittenberg ◽

Reinhard Steffen ◽

Hennig Windhagen ◽

Petra Bücking ◽

Andreas Wilcke

Keyword(s):

Revision Surgery ◽

Bacterial Infections ◽

Primary Standard ◽

Short Stem ◽

Stem Length ◽

Long Term Results ◽

Harris Hip Score ◽

Joint Dislocations ◽

Short Stems

Hip prosthesis stems with a short stem length and proximal fixation geometry support a bone-preserving and muscle-sparing implantation and should also allow for revision surgery with a standard hip stem. We present 250 prospectively documented clinical and radiological results from the Metha Short Hip Stem prosthesis (B. Braun-Aesculap, Tuttlingen, Germany) after an average follow-up of 4.9 years. The average patient age at surgery was 60 years. Indication for total hip replacement was primary osteoarthrosis (OA) (78% of patients), OA based on developmental dyspla- sia of the hip (16%), and other indications (6%). At the last follow-up, the average Harris Hip Score was 97 points. 85% of patients were very satisfied and 14% were satisfied after surgery, whereas 1% were dissatisfied. Pain according to the Visual Analogue Scale improved from 7.4 (min 1.6, max 9.5) pre-operatively to 0.23 (min 0, max 6.6). No joint dislocations occurred when predominantly using 28 mm and 32 mm prosthesis heads. Nine short-stems were revised: three after bacterial infections, two after primary via valsa with penetration of the femoral cortex two and three months after surgery, and three after early aseptic cases of loosening within the first year. A further nine osseously consolidated short-stems had to be replaced due to breakage of the modular titanium cone adapter after an average of 3.1 years (min 1.9, max 4.4). All surgical revisions were performed using primary standard stems. Without taking the material-related adapter failures into account, a five year Kaplan-Meier survival rate of 96.7% (95% confidence interval 93.4-98.3) was determined for the short-stem prostheses. There were no radiological signs of loosening in any of the short-stem prostheses at the last examination. Fine sclerotic lines were detected in Gruen’s AP zones 1 (19%) and 2 (10.5%), individual hypertrophies in zone 3 (3.5%), fine seams in zones 4 (5.5%) and 5 (4%), without pedestal formations in zone 4, clear cancellous bone compressions in zone 6 (97.5%), as well as single fine scleroses (1.5%) and atrophies (2.5%) in zone 7. The mid-term clinical results with periprosthetic bone remodeling and without radiological signs of loosening confirm this metaphyseal short-stem treatment and fixation concept and the possibility of revision surgery using standard hip stems. Long-term results must be further observed on a prospective basis as part of this collective study.

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A Mid- to Long-Term Results of The Avascular Fibular Grafting in ONFH With 6 to 8-Year Follow-Up

10.21203/rs.3.rs-81466/v1 ◽

2020 ◽

Author(s):

Peng Yuan ◽

Bin Du ◽

Xin Liu ◽

Guang-Quan Sun ◽

Xuan-Ye Lin ◽

...

Keyword(s):

Survival Rate ◽

Femoral Head ◽

Clinical Success Rate ◽

Activity Level ◽

Long Term Results ◽

Harris Hip Score ◽

Small Scale ◽

Fibular Grafting

Abstract Background: Free vascularized fibular grafting was reported a favorable method to prevent the collapse of the femoral head. Nevertheless, this operation is traumatic and expensive. This study analyzed the long-term outcomes of avascular fibular grafting for osteonecrosis of the femoral head(ONFH) with 6 to 8 year follow-up.Methods: From March 2009 to March 2012, 34 patients(48 hips) were diagnosed the ONFH with Association Research Circulation Osseous(ARCO) stage of Ⅱ to Ⅲb and operated with avascular fibular grafting in Jiangsu Province Hospital of traditional Chinese Medicine. We retrospectively reviewed the clinic effects of these patients and assessed the difference effects with diverse stages(ARCO) and types(China-Japan Friendship Hospital classification, CJFH) annually. The hip survival rate, Harris hip score, activity level and imaging stability were calculated. The average follow-up time was 6.7 years.Results: At the last follow-up,34 of 48 hips survived totally. Depending on the ARCO stage, The overall clinical success rate for hip preserving were 76.0% (19/25) in Ⅱ stage ,85.7%(12/14) in ⅢA stage and 33.3%(3/9) in ⅢB stage. Referring to the CJFH classification system, the hip survival rate were 100%(2/2) in M type,90.9%(10/11) in C type,77.8%(14/18) in L1 type,57.1%(8/14) in L2 type and 0%(0/3) in L3 type. The mean VAS score, HHS, and WOMAC were significantly improved at the final follow-up compared with preoperative values (p < 0.001).Conclusion: The avascular fibular grafting operation can increase the hip function and improve patients’ lives quality. It possesses vast clinical as well as practical significance, because the long-term efficacy can satisfy fundamental life requirements, especially for those early-stage and small-scale patients who suffer ONFH to avoid or put off the time of total hip arthroplasty(THA) surgery.

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The Modified Dunn Osteotomy for SCFE: Clinical and Radiographical Results at 3 Years Follow-Up

The Journal of Hip Surgery ◽

10.1055/s-0038-1627448 ◽

2017 ◽

Vol 01 (04) ◽

pp. 173-179

Author(s):

Oliver Eberhardt ◽

Thomas Wirth ◽

Michele Surace ◽

Francisco Fernandez ◽

Nicola Guindani

Keyword(s):

Short Form ◽

Slipped Capital Femoral Epiphysis ◽

Long Term Results ◽

Harris Hip Score ◽

Slip Angle ◽

Clinical Consequence ◽

Retrospective Clinical Study ◽

Outcome Scores ◽

The Mean

AbstractThe modified Dunn osteotomy (MDO) gained popularity for the treatment of moderate-to-severe SCFE over the past years, even though both indications and outcomes are currently debated. The aim of this study is to evaluate results and complications of MDO consecutively performed at a single institution for severe slipped capital femoral epiphysis (SCFE) (slip angle ≥ 60°). In this retrospective clinical study, 23 hips (22 patients) were treated with MDO (2009–2015). SCFE was classified according to stability, slip angle, and as chronic/acute. Clinical assessment was performed with clinical examination and nonarthritic hip score (NAHS), modified Harris hip score (mHHS), and short form 12 (SF-12) outcome scores. Residual deformity, avascular necrosis (AVN), and osteoarthrosis (OA) were measured on plain radiographs. The mean slip angle was 70° (range 60–90); 17 of 23(74%) patients had a chronic SCFE, 6 of 23(26%) had acute-on-chronic SCFE, and 1 of 23(4%) had an unstable SCFE. The mean age at surgery was 14 years (range 11–17). At 3 years follow-up (range 1–7), 4 of 23(17%) patients had an AVN or AVN progression, one of these needing a hip arthroplasty. All the cases of AVN or AVN progression were diagnosed within the first year after surgery and there was an association between AVN and operation date (with more AVN among patients operated earlier). Out of 23 patients, 2 (9%) had an implant mobilization or failure and needed a revision surgery without further complications, 1 (4%) developed an asymptomatic heterotopic calcification, and another a partial implant removal without clinical consequence. At follow-up, the slip angle was 9° (range 1–15) and outcome scores were improved. MDO is a demanding technique which allows a near anatomical correction of SCFE and the overall complication rate is not negligible. With actual data, the authors only recommend this procedure for specialized centers, performed by experienced high-volume surgeons, and for severe displaced SCFE (≥50°). The long-term results must be closely monitored and compared with the natural history and other treatment options. This study was a Level IV retrospective study in a case series.

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Mid- to long-term results of modified avascular fibular grafting for ONFH

Journal of Hip Preservation Surgery ◽

10.1093/jhps/hnab046 ◽

2021 ◽

Author(s):

Peng Yuan ◽

Xin Liu ◽

Bin Du ◽

Guang-Quan Sun ◽

Xu Wang ◽

...

Keyword(s):

Survival Rate ◽

Femoral Head ◽

Clinical Success Rate ◽

Activity Level ◽

Long Term Results ◽

Harris Hip Score ◽

Small Scale ◽

Fibular Grafting

Abstract Free vascularized fibular grafting was reported a favorable method to prevent the collapse of the femoral head. This study analyzed the mid- to long-term outcomes of avascular fibular grafting (AVFG) for osteonecrosis of the femoral head (ONFH) with 6- to 8-year follow-up. From March 2009 to March 2012, 34 patients (48 hips) were diagnosed with ONFH operated with AVFG in Jiangsu Province Hospital of traditional Chinese Medicine. We retrospectively reviewed the clinic outcomes of these patients and evaluated the differences in outcomes by diverse stages [Association Research Circulation Osseous (ARCO)] and types [China–Japan Friendship Hospital (CJFH) classification] annually. The hip survival rate, Harris hip score (HHS), activity level and imaging stability were calculated. The average follow-up time was 6.7 years. At the last follow-up, 34 of 48 hips survived totally. According to the ARCO stage, the overall clinical success rate for hip preserving were 76.0% (19/25) in II stage, 85.7% (12/14) in IIIA stage and 33.3% (3/9) in IIIB stage. Referring to the CJFH classification system, the hip survival rate were 100% (2/2) in M type, 90.9% (10/11) in C type, 77.8% (14/18) in L1 type, 57.1% (8/14) in L2 type and 0% (0/3) in L3 type. The mean visual analog scale (VAS) score, HHS and Western Ontario McMaster Osteoarthritis index (WOMAC) were significantly improved at the final follow-up compared with pre-operative values (P < 0.001). The AVFG operation can increase the hip function and improve patients’ lives quality. The mid- to long-term efficacy can satisfy fundamental life requirements, especially for those early-stage and small-scale patients who suffer ONFH to avoid or put off the time of total hip arthroplasty surgery.

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Hip Arthroscopy for Femoroacetabular Impingement in Adolescents: 10-Year Patient-Reported Outcomes

The American Journal of Sports Medicine ◽

10.1177/0363546520973977 ◽

2020 ◽

Vol 49 (1) ◽

pp. 76-81 ◽

Cited By ~ 1

Author(s):

Travis J. Menge ◽

Karen K. Briggs ◽

Michael D. Rahl ◽

Marc J. Philippon

Keyword(s):

Patient Satisfaction ◽

Femoroacetabular Impingement ◽

Revision Surgery ◽

Hip Arthroscopy ◽

Patient Reported Outcomes ◽

Labral Repair ◽

Harris Hip Score ◽

Duration Of Symptoms ◽

Patient Reported

Background: Previous studies have demonstrated hip arthroscopy to be an effective treatment for femoroacetabular impingement (FAI) in individuals 18 years of age and older. Long-term outcome data in the adolescent population, however, are limited. Purpose: To report 10-year outcomes after hip arthroscopy in adolescents with symptomatic FAI. Study Design: Case series; Level of evidence, 4. Methods: Prospectively collected data were analyzed on adolescent patients younger than 18 years of age who had hip arthroscopy between March 2005 and 2009 with a minimum 10-year follow-up. Patients were included if they were diagnosed with symptomatic FAI and an associated labral tear that was treated with repair. Patients were excluded if they had previous hip procedures, acetabular dysplasia (lateral center-edge angle, <20°), avascular necrosis, previous hip fracture or dislocation, or Legg-Calve-Perthes disease, or refused to participate. The primary patient-reported outcome measure was the Hip Outcome Score (HOS) Activities of Daily Living (ADL) subscale. In addition, the HOS—Sport, modified Harris Hip Score (mHHS), 12-Item Short Form Health Survey (SF-12), and patient satisfaction were collected. Failure was defined as patients having to undergo revision arthroscopy. Results: There were 60 patients (70 hips) who met inclusion criteria and had a 10-year follow-up. The mean age of the cohort was 16 ± 1.2 years, with 21 male and 49 female hips. Seven hips (10%) required revision hip arthroscopy. All revisions occurred in female patients and were associated with global laxity as well as longer duration of symptoms before time of surgery. At a mean follow-up of 12 years (range, 10-14 years), patients who did not undergo revision surgery had significant improvements from preoperatively to postoperatively in HOS-ADL (from 64 to 92; P < .01), HOS–Sport (from 40 to 86; P < .01), mHHS (from 56 to 88; P < .01), and SF-12 Physical Component Summary (from 41 to 54; P < .01). The median patient satisfaction was 10 out of 10 (very satisfied). Conclusion: Hip arthroscopy for FAI with labral repair resulted in excellent patient-reported outcomes and satisfaction at a minimum of 10 years of follow-up. There was a 10% rate of revision surgery, which was associated with global laxity and longer duration of symptoms before surgery, which should be considered in patient selection.

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