Introduction. Pelvic osteotomy such as Chiari osteotomy and rotational acetabular osteotomy (RAO) have been used successfully in patients with developmental dysplasia of the hip (DDH). However, some patients are forced to undergo total hip arthroplasty (THA) because of the progression of osteoarthritis. THA after pelvic osteotomy is thought to be more difficult because of altered anatomy of the pelvis. We compared six THAs done in dysplastic hips after previous pelvic osteotomy between 2008 and 2015 with a well-matched control group of 20 primary procedures done during the same period. Materials and methods. Six THAs for DDH after previous Pelvic osteotomy (three Chiari osteotomies and three RAOs) were compared with 20 THAs for DDH without previous surgery. The patients were matched for age, sex, and BMI. Minimum follow-up for both groups of patients was one year (range, 12–79 months and 12–77 months, respectively). The average interval from pelvic osteotomy to total hip arthroplasty was 19.8 years (range 12–26 years). Clinical and Radiological evaluations were performed. Results. Both groups had similar short-term results except clinical score. There were no signiï¬ï¿½cant differences in range of motion, intraoperative blood loss and operative time between the two groups. There were no infections, dislocations, intraoperative fractures, damaged nerves, or deep vein thromboses in either group. Clinical score according to Japanese Orthopaedic Association rating system at the most recent follow-up were significantly lower in previous pelvic osteotomy group (P=0.003). Lower clinical score was assumed to be caused by one patient with previous Chiari osteotomy who had contralateral sciatic nerve palsy which was unrelated to the surgery. Although we were concerned about the failures on the acetabular side in patients with THA after pelvic osteotomy because of osteosclerotic acetabular bone, no acetabular component exhibited loosening or revision. This result supports the thought that the pelvic osteotomy fragment maintains its blood supply and allows porous acetabular components to ingrow. Conclusion. Pelvic osteotomies do not seem to compromise the short-term clinical or radiographic outcome

Mixed Reality has the potential to improve accuracy and reduce required dissection for the performance of peri-acetabular osteotomy. The current work assesses initial proof of concept of MR guidance for PAO. A PAO planning module, based on preoperative computed tomography (CT) imaging, allows for the planning of PAO cut planes and repositioning of the acetabular fragment. 3D files (holograms) of the cut planes and native and planned acetabulum positions are exported with the associated spatial information. The files are then displayed on mixed reality head mounted device (HoloLens2, Microsoft) following intraoperative registration using an FDA-cleared mixed reality application designed primary for hip arthroplasty (HipInsight). PAO was performed on both sides of a bone model (Pacific Research). The osteotomies and acetabular reposition were performed in accordance with the displayed holograms. Post-op CT imaging was performed for analysis. Cutting plane-accuracy was evaluated using a best-fit plane and 2D angles (°) between the planned and achieved supra (SA)- and retroacetabular (RA) osteotomy and retroacetabular and ischial osteotomies (IO) were measured. To evaluate the accuracy of acetabular reorientation, we digitized the acetabular rim and calculated the acetabular opening plane. Absolute errors of planned and achieved operative inclination and anteversion (°) of the acetabular fragment, as well as 3D lateral-center-edge (LCE) angles were calculated. The mean absolute difference between the planned and performed osteotomy angles was 3 ± 3°. The mean absolute error between planned and achieved operative anteversion and inclination was 1 ± 0° and 0 ± 0° respectively. Mean absolute error between planned and achieved 3D LCE angle was 0.5 ± 0.7°. Mixed-reality guidance for the performance of pelvic osteotomies and acetabular fragment reorientation was feasible and highly accurate. This solution may improve the current standard of care by enabling reliable and precise reproduction of the desired acetabular realignment

Introduction: Insufficient femoral head coverage is found in a variety of diseases, with acetabular dysplasia as the most frequent disorder and the triple pelvic osteotomy as the most recently introduced surgical treatment. Objective: The study analyses pre- and postoperative pathoanatomical characteristics of triple in comparison to Salter and Chiari osteotomies, with a logistic regression analysis of outcome predictor and effect explanator factors in relation to the chosen type of operation. Methods: The study involved 136 adolescents, treated with Salter and Chiari osteotomies or a triple pelvic osteotomy. The patients were between 10–20 years old at the time of operation. The following data from all the patients were analysed: illness history, operative parameters, preoperative and postoperative pathoanatomic data. The data was statistically processed using the statistical software SPSS, defining standard descriptive values, and by using the appropriate tests of analytic statistics. Results: The average CE angle after triple pelvic osteotomy was 43.5 degrees, more improved than after the Salter osteotomy (33.0 degrees) and Chiari osteotomy (31.4 degrees). Postoperative spherical congruence was also more frequent after the triple osteotomy than after the other two types of operations. Preoperative painful discomfor was found to be a valid predictor of indications for the triple osteotomy over both Chiari and Salter osteotomies. The valid explanators of the effect of the triple osteotomy are: postoperative joint congruence (compared to the Chiari osteotomy) and increase in joint coverage (compared to Salter osteotomy). Conclusion: Triple pelvic osteotomy is the method of choice in the management of acetabular dysplasia and other disturbances of hip joint containment in adolescent age

We have been following all modern trends in the treatment of Legg-Calve-Perthes disease during several decades (from nonoperative treatment, revascularization procedures, varization femoral osteotomies to various pelvic osteotomies). Last few years we have started to use triple pelvic osteotomy in patients older than seven years, in order to shorten treatment period, establish solid containment and subsequent remodelation of femoral head, and achieve final spheric hip congruence. In the period from 1996 to 2004 we had 28 such surgical interventions. Patient age at surgery was between 7 and 10 years. All hips were uncontained preoperatively, and in fragmentation stage. Twelve hips were classified as Catterall group III and sixteen hips as Catterall group IV. Triple pelvic osteotomy according to Tonnis (modified by Vladimirov) was performed in all cases. Average follow-up period was 40 (28–96) months. Treatment result was good in all patients, with full functional recovery. Spheric joint congruence was achieved in 24, and aspheric congruence in other 4 cases. Average period for union of osteotomies was 10 weeks, followed by introduction of full weight bearing, considerably earlier than in patients with similar age and disease stage, treated by combination of Salter pelvic osteotomy and femoral shortening

Over the last several years, triple pelvic osteotomy has become our preferred method for surgical containment in Perthes disease. Since 1995, seventeen patients with Perthes disease have been treated with triple pelvic oste-otomy at our institution. Fourteen of seventeen patients (82%) had a good or excellent clinical result at latest follow-up. According to Sundt’s criteria, radiographic outcome was rated as good in fourteen patients (82%), fair in one patient and poor in two patients. Experience with the technical aspects of the procedure is necessary to avoid pseudarthrosis and iatrogenic external rotation of the acetabular fragment. To evaluate the efficacy of triple pelvic osteotomy as a method of surgical containment in Perthes disease. Recent trends point to surgery as the method of choice for containment in older children with Perthes disease. Over the last several years, triple pelvic osteotomy has become our preferred method for surgical containment in Perthes disease. Since 1995, seventeen patients (seventeen hips) with Perthes disease classified as either lateral pillar B or C have been treated with triple pelvic osteotomy at our institution. The average age at surgery was 8.5 years with an average follow-up of 4.3 years. Outcome was assessed using clinical as well as multiple radiographic criteria. Fourteen of seventeen patients (82%) had a good or excellent clinical result at latest follow-up. No patients had a residual limp or limb length inequality. Two patients had a minor postoperative complication (transient peroneal nerve palsy, meralgia paresthetica). According to Sundt’s criteria, radiographic outcome was rated as good in fourteen patients (82%), fair in one patient and poor in two patients. Triple pelvic osteotomy minimizes potential complications associated with other surgical methods such as Trendelenberg gait and shortening with proximal femoral osteotomy or hinge abduction following a Salter innominate osteotomy. Experience with the technical aspects of the procedure is necessary to avoid pseudarthrosis and iatrogenic external rotation of the acetabular fragment. Triple pelvic osteotomy is now our procedure of choice for containment in the older child with Perthes disease

Introduction: There are several possibilities for the treatment of Legg-Calve-Perthes (LCP) disease in older age group (more than 10 years of age): varus femoral osteotomies, different pelvic osteotomies (Salter, Chiari, triple), and the combination of pelvic and femoral osteotomies (Salter with femoral shortening). Material and methods: We analyzed 214 hips with LCP disease surgically treated in our Institute in the period 1972–1999. Age of our patients ranged from 10–13 years. All of them were operated in the fragmentation phase of the disease. The distribution according to Catteral classification was: group II – 29 (13,5%), group III – 108 (50,5%), group IV – 77 (36%). Different risk factors were present in 154 (72%) cases. We performed: 69 (32,3%) varus femoral osteotomies, 32 (14,9%) Salter osteotomies, 69 (32,3%) Salter osteotomies with femoral shortening, 23 (10,7%) Chiariosteotomies and 21 (9,8%) triple pelvic osteotomies. There were no statistically significant differences between treatment groups (preoperatively). Postoperativelly hips were assessed clinically and radiologically. Follow-up period was in average 9,2 years (at least 3 years). Results: All procedures showed improvement in hip containment and functional status. The best anatomical results were in the group of patients treated by triple pelvic osteotomy (p=0,02), very good results were found in the groups of patients treated by varus femoral osteotomy and Salter osteotomy with femoral shortening, whereas the results of treatment in the other groups were slightly worse. Triple pelvic osteotomy and Salter osteotomy (with or without femoral shortening) showed the best functional recovery. Positive Trendelenburg sign and waddling gait were present only in the groups of patients treated by varus femoral osteotomy and Chiariosteotomy. Conclusion: Triple pelvic osteotomy is the best procedure for the treatment of LCP disease in the older age group

When surgical treatment of dysplastic hip and hip joint incongruence in adolescence is necessary, triple pelvic osteotomy is preferable to other types of pelvic osteotomies (even when they are associated with femoral ones). We evaluated our ten years long experience with the mentioned method. We treated 78 hips (67 patients) with Tonnis-Vladimirov triple pelvic osteotomy between 1996 and 2005. Average age of our patients was 15 years and 6 months. The patients were followed for mean 39 (17–133) months. In 2 hips triple pelvic osteotomy was associated with femoral corective osteotomy, in one hip with femoral corective osteotomy and open reduction, and in 7 with the translocation of the greater trochanter. Treatment results were evaluated, both anatomically and functionally. Anatomic improvement was detected by measuring CE angle of Wiberg. It improved from an average of 16,1 – to 43,1 degrees – the difference has proven to be statistically highly significant. Functional improvement (absence of waddling gate or limp; as well as better range of motion) was noticed in almost all the cases. The improvement was accompanied by spatial reorientation and correction. Major complications included asymptomatic pubic and/or ischial osteotomy nonunions in seven patients. We found good radiographic correction of deformities and improvement of hip function with an acceptable complication rate. With appropriate patient selection, this procedure is the most physiological treatment of acetabular dysplasia and hip joint incongruence in patients older than 8–10 years. It may prevent and postpone the development of secondary osteoarthrosis

Hip arthroscopy (HA) and pelvic osteotomy (PO) are surgical procedures used to treat a variety of hip pathology affecting young adults, including femoroacetabular impingement and hip dysplasia respectively. This study aimed to investigate the trends and regional variation in the provision of HA and PO across England from 2010 to 2023 to inform healthcare resource allocation. We analysed the National Hospital Episode Statistics database for all HA and PO procedures in NHS England using specific OPCS-4 codes: HA: ‘W83+Z843’ or ‘W84+Z843’; PO: ‘X222+Z75’. We collected patient demographics, age, sex, and region of treatment. We performed descriptive and regression analyses to evaluate temporal trends in PO volume, age, sex and regional variation. 22,401 HAs and 1,348 POs were recorded between 2010 and 2023. The annual number of HAs declined by 28.4%, whilst the number of POs increased by 64% (p<0.001). Significantly more females underwent PO vs HA (90% vs 61.3%) and were older than males undergoing the same procedure (PO: 29.0±8.7 vs 25.8±9.2 years; HA: 36.8±12.0 years vs 35.8±11.2 years, p<0.001). For HA, the mean age of both sexes decreased by 3.3 and 2.9 years respectively (p<0.001), whereas the age of PO patients did not change significantly over the study period. There were significant regional variations with a mean incidence of 1.60/100,00 for HA (ranging from 0.70–2.66 per 100,000) and 0.43/100,000 for PO (ranging from 0.08–2.07 per 100,000). We have observed a decline in HA volume in England, likely due to improved patient selection and the impact of COVID-19, whilst PO volume has significantly increased, with regional variation persisting for both procedures. These trends highlight the need for equitable HA and PO access to improve patient outcomes and call for strategic healthcare planning and resource allocation to reduce disparities and improve training opportunities

Purpose of study. This study is to determine the survival and outcomes of the Birmingham Interlocking Triple Pelvic Osteotomy. A dysplastic hip predisposes to early arthritis. The Triple Pelvic Osteotomy (TPO) is a joint-preserving option for the treatment of young adults with hip dysplasia. The long term success of the procedure is not known. Patients and methods. The senior author has been performing Birmingham Interlocking Triple Pelvic Osteotomies for 18 years. The outcomes of the first 100 patients (117 TPOs) were reviewed using postal questionnaires, telephone interviews and radiograph review. The primary outcome measure of the study was the Kaplan—Meier survival curve for the TPO. Hip replacement or resurfacing were taken as failure points. The Oxford Hip Score (OHS) and University of California, Los Angeles (UCLA) score were used as secondary outcome measures for the surviving osteotomies. The pre-and post-operative acetabular index and centre-edge angles were measured from surviving radiographs. Results. Follow-up was 93% for survivorship. The mean age at operation was 31 years (range of 7 to 57 years). The mean pre- and post-operative centre-edge angles were 19°and 50° and acetabular indices were 23° and 2°. The Kaplan-Meier survival curve demonstrates that the 10, 15 and 18-year survival rates are 76%, 57% and 50% respectively. Survival was 89% if the osteotomy was performed before 20 years of age. The median UCLA score was five (inter-quartile range three to seven). Median OHS was 41 (inter-quartile range 24 to 46). The UCLA and OHSs show that those with surviving osteotomies tend to have good hip function. Conclusions. The Birmingham Interlocking Pelvic Osteotomy provides a valuable tool to preserve dysplastic hip function and delay arthroplasty surgery, particularly in the younger patient. It is best performed early before arthritis sets in

Dysplasia of the hip in children, characterised by a shallow acetabulum and a deficient coverage of the femoral head, generally causes altered biomechanics of the hip joint. A kinematic analysis on the individual and comparative spatial movement of the acetabulum with some of the pelvic osteotomy techniques is performed. The osteotomy providing greater correction in most of the parameters potentially leading to greater reduction in loading is the choice of the surgeon. Adult saw bone hip models have been used. Points of reference have been carefully chosen and data has been obtained using the Polhemus Electromagnetic measuring system before and after the osteotomy. Five techniques (Chiari, Salter, Steel, Tonnis and Ganz) have been performed, parameters like the Centre-edge angle, Sharp’s angle, Acetabular Head index (Femoral head cover), translation and rotation in 3 planes have been analysed. Results show an improvement in most of the parameters when the above pelvic osteotomies are performed. Centre-Edge angle improved by a mean (in degrees) of 7.4 (Chiari), 9.6(Salter), 16.9(steel), 28.4(Tonnis) and 31.0(Ganz). There has been marked increase in Femoral head cover with mean 24% with Tonnis and Ganz. Significant changes in rotational parameters in all 3 planes were achieved, particularly with Ganz and Tonnis techniques. Traditionally acetabular dysplasia correction has been assessed in one or two dimensions by plain radiographs and true three dimensional movement of the acetabulum is difficult to assess with simple techniques. This study describes a simple and reproducible method to compare the various pelvic osteotomies and comparative effects these can produce on the kinematics of the hip joint. It is intended to extend this study to include kinetics to compare the forces and stress distribution changes caused by performing the above techniques and a larger study is recommended, based on this technique and the initial trend of results shown

Background The complex ranges from mild epispadias to devastating cloacalexstrophy. Affected babies require multidisciplinary care. The orthopaedic surgeon may assist either directly, in releasing the midline by pelvic osteotomies or indirectly, by advice and treatment of musculoskeletal symptoms related to disturbed mechanics or deformity in the spine, pelvis and lower limbs. Traditional osteotomies are posterior or horizontal. A technique of an oblique osteotomy from the sciatic notch to the iliac crest has been developed at Great Ormond Street since 1996, along with a system of external fixation. It is undertaken concurrently with urological reconstruction. The system of external fixation is relatively simple compared with other published work. Methods We reviewed the results of 45 oblique osteotomies performed in conjunction with genito-urinary repair of classical and cloacal bladder exstrophy. Average follow-up was 37 months. Clinical outcome measures were pain, function, continence and normal gait. All radiographs were reviewed and the pubic intersym-physeal diastasis was recorded pre-operatively and on the latest post-operative x-ray. Children were grouped according to the age at the time of osteotomy. Also children with classical exstrophy were divided into 4 groups on the basis of continence. The mean post-operative percent reduction in the amount of the original diastasis was determined for all age groups. Comparison of pubic approximation was made between the two types of post-operative immobilisation. Results The majority of patients (42) reported no pain or functional disability. Six cases had a waddling gait pattern and 2 had residual external rotation. All the wounds healed and every osteotomy united. The average improvement in pubic approximation was 37% for the whole series. Chidren who were older at the time of surgery (18–60 months) were found to maintain better correction over time (76%). Children immobilised with an external fixator maintained better closure of the pelvis than those treated with plaster cast alone. (51% and 12.2% respectively). Maintenance of pubic approximation was associated with a higher level of bladder continence. Complications included 3 cases of infection and loosening of the external fixator requiring early removal. There were no neurovascular complications. Conclusion Oblique pelvic osteotomy is an effective part of the reconstruction bladder exstrophy and compares well with other types of osteotomy. It is a reliable operation and the technique is applicable to all age groups. Technique of Oblique Pelvic Osteotomy Oblique pelvic osteotomy is performed by first placing the patient in the supine position, preparing and draping the lower part of the body from the costal margin to the mid-thigh. Intravenous antibiotic prophylaxis is administered and continued for a 24-hour period. Initially the Urologist will make an infra-umbilical incision then identify and mobilise the anatomical structures intended for their subsequent reconstruction and repair. This wound is then temporarily closed. The Orthopaedic surgeon will then approach the ilial crest through bilateral oblique incisions made inferior to the anterior superior ilial spine as described for the Salter osteotomy. The interval is developed distal to the anterior superior ilial spine after identification and protection of the lateral femoral cutaneous nerve which is taken medially. After the interval between sartorious and tensa fascia lata are identified the iliac apophysis is split and reflected off the inner and outer ilial crests. The exposure may be improved by also developing the interval between rectus femorus and gluteus medius. Each side of the pelvis is exposed sub-periosteally from the iliac crest extending into the sciatic notch. A Gigli saw is then passed through the sciatic notch. The line of the osteotomy is from the posterior part of the sciatic notch extending anteriorly and superiorly to exit the iliac crest 2cm posterior to the anterior superior iliac spine (figure 2). The most anterior 1.5cm of iliac crest from the distal pelvic fragment is trimmed to allow closure of the iliac apophysis after rotation. The size of the half pin utilised is determined by the age of the patient. A baby under 18 months old will have a 3.5mm pin from the AO wrist external fixator frame and an older child over 2 years, a 4.5mm half pin. One half pin is inserted on each side of the pelvis. The half pin is placed in the distal fragment from anterior and lateral to posterior and medial with the tip of the screw just exiting the cortical bone of the medial aspect of the sciatic notch (figure 3a). Consideration of pin placement must take into account rotation of the distal fragment and preventive skin pressure areas. The iliac apophysis is repaired and the skin wounds are closed. The Urologist completes the reconstruction procedure planned via their infra-umbilical approach. The final stage involves the medial and superior rotation of both distal pelvic fragments and subsequent closure of the symphyseal diastasis. This position is maintained with the application of an anterior A-shaped frame from the wrist, AO fixation set in the younger infant or the AO pelvic fixator in the older child (figure 3b). Symphyseal approximation is confirmed intra operatively by palpatation. Bilateral above knee front slabs casts are applied to prevent kicking the hips or knees. The post-operative management involves pin site care on alternate days. The front slab casts are removed at 3 weeks and the anterior A-frame is removed at 6 weeks after union is confirmed on a pelvic radiograph. Depending on the social situation the children may go home during the post-operative period

Aim: To determine the clinical, functional and radiological results of triple pelvic osteotomy for DDH. Method: An independent, retrospective review of 35 osteotomies, in 32 patients, with an average follow up of 48 months (4–48 months). Results: 75% achieved excellent to good results in The Harris Hip Score. The centre edge angle improved significantly from 10° to 35°. 3 hips have required further surgery in the form of total hip arthroplasty. We had 3 cases of incomplete sciatic nerve palsy (8%). Conclusion: On the basis of our results the Triple Pelvic osteotomy can be recommended for the treatment of acetabular dysplasia in adolescents and young adults

The best method of femoral head containment in Legg-Calvé-Perthes’ disease (LCPD) is still controversial. Triple pelvic osteotomy allows desired rotation of acetabulum, reduces the relative stress, provides optimum femoral head cover and compensates for shortening. The iliac osteotomy was modified to interlock following acetabular rotation to provide extra stability and allow early mobilisation. Material and methods: We reviewed 21 patients, who underwent interlocking triple pelvic osteotomy for severe Legg-Calvé-Perthes’ disease, to evaluate their clinical, radiological and functional results. The mean patient age at presentation was 7 years and 7 months. Fourteen hips were in the fragmentation stage whereas 8 were in the early re-ossification stage. Seventeen hips were Herring group C and 5 were group B. Seventeen hips had 2 or more at risk radiological signs. The average period of follow-up was 51 months (range, 33 months to 80 months). The average gain in acetabular head index was 18% and that in centre-edge angle was 22 degrees, more than reported for any other single surgical procedure. According to the Harris hip rating system, there was an average gain of 35 points. Average gains in abduction, internal rotation and flexion were 17, 12 and 28 degrees respectively. The average gain in length of the limb was 6.4 mm. Interlocking triple pelvic osteotomy in LCPD provides good cover of the femoral head, good symptom relief and markedly improved range of motion. Assessment of a few patients approaching maturity has shown a congruent hip joint with a spherical femoral head

Purpose: Iatrogenic acetabular retroversion is a known complication after pelvic osteotomy leading to persistent hip pain and increasing risk of subsequent osteoarthritis. The purpose of this study is to document the incidence of acetabular retroversion and signs of impingement in patients who have had a Salter pelvic osteotomy in childhood. Method: Twenty eight patients (32 hips) had a Salter Osteotomy between 1980 and 1999, 16 were lost to follow-up. Of the 12 studied, eight had a diagnosis of DDH and four had Legg Calve Perthes. Clinical assessment for the presence of the impingement sign, range of motion and leg length discrepancy was done as well as functional scores. AP pelvic radiographs were taken to assess acetabular retroversion (cross-over or ischial sign), osteoarthritis using the Tonnis grade, center-edge and Tonnis angles. Results: The mean age of the sample was 17.25 years (SD=7.27) with a mean follow-up of 10.56 years (SD=6.27). Impingement sign was positive in seven patients (58.3%). Nine out of the 12 had acetabular retroversion. Nine had Tonnis grade 1, two Tonnis grade 2, and one had a Tonnis grade 3. Mean center edge and Tonnis angles were 26° (SD=16.43) and 9.09° (SD=6.49), respectively. There was no correlation between presence of acetabular retroversion with Tonnis grade (p=.700), hip pain (p=.317) or impingement sign (p=.621). Conclusion: Retroversion is highly prevalent (69.2%) in patients who underwent a Salter pelvic osteotomy for a childhood hip disease. Although acetabular retroversion is a known cause of impingement in adulthood, our patient cohort was too small to detect a significant impact on the functional scores

Treatment of severe Perthes disease remains a major challenge. Various surgical options exist for containment. We describe the Birmingham interlocking triple pelvic osteotomy (BITPO) and report the results at skeletal maturity. We reviewed 22 hips in 21 consecutive patients with severe Perthes who had the BITPO. There were 16 males and 5 females. The mean age at presentation was 7 years 7 months. Seventeen hips were Herring group C and five were Herring group B. Six patients had four head-at-risk signs (HARS), 9 had three HARS, 4 had two HARS and 3 had a single HARS. The mean age at operation was 8 years 2 Months. Clinical, radiological and functional evaluations were under taken on these patients who have since reached skeletal maturity. The minimum follow up was 6 years. Average age at review was 18 years 8 months (range 16–25). Two patients have since had hip resurfacing, and two patients a double femoral osteotomy and one patient a surgical dislocation of the hip and valgus osteotomy. The average Harris Hip Score pre-operatively was 52, which improved to a mean score of 82. Eleven hips were classified as Stulberg I/II (50%), 9 hips Stulberg III/IV (41%) and 2 hips Stulberg V (9%). The average increase in Centre-Edge angle was 31 degrees and there was an average improvement of 24.6% in the head coverage. At follow up the average abduction was 31 degrees (improvement of 8.5 degrees), internal rotation 22 degrees (10.5 degree improvement) and flexion 106 degrees (11 degree improvement). We conclude that the Birmingham interlocking triple pelvic osteotomy provides excellent coverage of the femoral head in severe Perthes disease, recaptures and remoulds the deformed head and avoids retroversion of socket. Good results in severe Perthes disease are maintained beyond skeletal maturity

We present the results of Chiari pelvic osteotomy in the treatment of adolescent hip incongruence, with special interest in identifying possibilities, limitations and complications. In a series of 86 patients treated by Chiari pelvic osteotomy (13 operated bilateraly) at the Institute for Orthopaedic Surgery “Banjica” with a follow-up period more than 48 months, we analyzed the relation of Chiari-specific parameters collected from postoperative radiograms (osteotomy angle and heigth, and displacement index) to various preoperative and postoperative parameters (Sharp acetabular angle, Wiberg CE angle, Heyman and Herndon femoral head extrusion index (FHEI), Acetabular depth ratio (ADR), Shenton-Menard arch integrity, limb length discrepancy, gait quality) and functional result according to HHS and McKay scoring systems. We found highly significant improvements of Sharp angle (from 47.2±6.1° preoperatively to 38.6±7.8° finally, p<0.01), Wiberg CE angle (from 10.2±16.8° to 38.9±14.6°, p<0.01) and FHEI (from from 53.4±21% to 1.9±70.7%, p<0.01). In adition, HHS was also improved from 76±15.1 to final 87.9±9.4, p<0.01). We also assessed the satisfaction of both patients (index 4.2 out of 5) and surgeons (index 3.7 out of 5). Chiari pelvic osteotomy is useful surgical procedure in the selected cases of adolescent hip incongruence with disturbance of hip centering and coverage

The purpose of the research: demonstration of a hip caput matrix modeling opportunities, restoration of a joint stability and joint anatomy improvement in three planes after triple osteotomy of the pelvic by A.M.Sakalouski with Perthes disease patients. Patients and methods: From 1998 to 2007 years were performed 37 triple pelvic osteotomy in 36 patients at 4 to 18 (average age 11 years) with unfavorable course of Perthes disease. In 28 cases patients were male and in 8 cases patients were female. We have observed patients clinically and with radiological methods, including computer tomography with 3D-reconstruction. Indications for pelvic osteotomy include signs of poor prognosis at stages II–III. Radiological signs of risk. The indication to triple pelvic osteotomy on residual stages - this is a secondary acetabular dysplasia and decentration. If the head of a hip is hardly deformed (flat) by the first stage us carried out back or forward rotation hips osteotomy with turn on 70°–90°, and then triple pelvic osteotomy. Results: The triple osteotomy of the pelvic prevented deformation of the head of a hip at e at 2–3 stages as a result remodeling of femoral caput by spherical acetabulum. At late stages operation has provide to avoid hip arthrosis. Medialization of the hip joint which led to reducing the joint reactive force. In all cases the head centration and stability of a joint are restored. The angle of Wiberg has increased from 15° to 35°, index Eyre-Brook has increased on 20°, an index acetabular coverage – from 72% to 100%. In all cases clinically the lengthening of sick finiteness has been received with 0,5–1 cm and a gait of patients has improved. The volume of movements in a joint was on the average: flexion 110°, extension 10°, abduction 23°, adduction 30°, external rotation 37° degrees, internal rotation 13°. The stop of trochanter growth at a level of the center head rotation hip or slightly above. Conclusion: So, triple pelvis osteotomy is the way modern surgical treatment of Perthes disease, it provides preventive maintenance of deformation of the head of a hip – if operative intervention is carried out at early stages of illness when the head has potential to remolding or preventive arthrosis – at residual stages

Hip dysplasia is a common cause of hip pain in young adults. Pelvic osteotomy (PO) techniques are the gold standard for treating symptomatic patients, albeit technically demanding. This study aimed to (1) evaluate the 90-day complication rate, and (2) investigate the reasons, frequency and timing of reoperations following primary PO procedures. We retrospectively analysed the National Hospital Episode Statistics database, examining all patients aged over 14 who underwent PO in NHS England hospitals from 2010 to 2023. We identified index procedures and reoperations using relevant OPCS-4 codes. We analysed patient demographics, 90-day complications, and readmission rates for ipsilateral metalwork removal, revision PO, hip arthroscopy (HA), and THR conversion, and calculated the mean time to reoperations. This study included 1,348 PO cases (mean age: 28.7±9.1 years, 89.5% female). The mean hospital stay was 5.4±3.9 days, with a 90-day readmission rate of 0.52% at a mean of 51.0±17.2 days. The most common causes were infection (0.22%) and reoperation (0.15%). The 90-day rate of pulmonary embolism and deep vein thrombosis was 0.074%. One patient died within 90 days. Overall, 810 patients (60.1%) were readmitted for a subsequent hip procedure at a mean of 2.12±1.90 years following their primary PO. Metalwork removal was required in 616 patients (45.7%) at a mean of 1.70±1.19 years. Readmission rates for revision PO, HA, and THR, were 4.23% (mean time: 2.89±0.82 years), 4.15% (mean time: 2.91±2.28 years) and 6.01% (mean time: 5.24±3.08 years) respectively. This study highlights a low 90-day complication rate following primary PO, but a high reoperation rate, mainly for metalwork removal. We provide the most up-to-date report of revision PO, HA and THR conversion rates in England. These findings provide valuable insight that can facilitate informed decision-making, expectation-setting, and post-operative planning, also establishing a benchmark for future quality improvement

Purpose: To describe a simple method for performing pelvic osteotomies in children that will obtain appropriate femoral head coverage. Method: The necessary femoral head coverage was preoperatively predicted by assessing the acetabular, Wiberg, and Lequesne angles, and by 3-D CAT scan evaluations of each hip. Postoperative results were evaluated in a similar manner and compared with the preoperative findings. An “almost” percutaneous triple pelvic osteotomy was performed using an adductor incision and a transverse incision. Results: In spite of the theoretical restrictions in this age group to acetabular movement, i.e. rigid triradiate cartilage, stiff symphysis pubis and rigid sacrospinous and sacrotuberous ligaments, adequate coverage of the femoral head was attained with the described technique. Conclusion: If a pelvic osteotomy is being considered to better stabilize a child’s hip due to a condition such as Legg-Calve-Perthes disease, hip dysplasia, a deformed femoral neck secondary to slipped capital femoral epiphysis or femoral head necrosis, the “almost” percutaneous triple osteotomy has a decided advantage over other well described pelvic osteotomies since it is simpler to perform and sufficiently covers the femoral head

Introduction. Acetabular dysplasia is a common cause of osteoarthritis of the hip. Chiari pelvic osteotomy enables medialization of the center of the femoral head and improvement of coverage over the femoral head for hip dysplasia and prevents or delays progression of degenerative arthritis. We reviewed 104 patients after this augmentation procedure. Patients and methods. Between 1989 and 2000, 167 patients with developmental dysplasia of the hip had undergone the surgery at university hospital. Among them, 104 patients were able to be traced after surgery for more than 10 years. The mean follow-up period was 15.5 years. There were 96 women and 8 men with an average age of 34.3 years at surgery. The average angle of osteotomy was 6.6 degree craniad to the horizontal plane. Ratio of migration of the distal pelvis was 42%. Results. 8 hips were replaced by prosthesis. Setting total hip arthroplasty as an end point, 10-year, 15-year and 20-year survival rate was 99.0, 92.3 and 70.0% respectively. Patients with minimal grade of osteoarthritis at the time of osteotomy preserved 5.4 mm joint space on plain radiographs of last time follow-up. Patients with moderate or severe grade of osteoarthritis at the time of surgery had only 2.5 mm joint space at last. All patients with minimal grade of osteoarthritis could avoid total hip arthroplasty. Conclusion. Chiari pelvic osteotomy can prevent progression of degenerative arthritis in patients with minimal grade of osteoarthritis for more than 15 years