0
AVASCULAR NECROSIS FEMUR HEAD
new experiments
Ramesh K Sen
MS, DNB Ortho, PhD
Professor, Department of Orthopedics

Postgr...
AVASCULAR NECROSIS FEMUR
HEAD-EXPERIMENTS
Diagnostic experiments
• Medical management
•

•

Surgical salvage femur head

•...
AVN- MRI DIAGNOSIS
MRI T1 Image

signal from ischemic marrow
• Single band like area of low signal
intensity.
•

•

100% s...
MRI IN DIAGNOSIS OF AVN
Results of a rapid screening protocol (imaging
time<1 minute) similar to those of the routine
prot...
MRI EVALUATION POST HIP
DISLOCATION WITH DELAYED
RELOCATION
MRI EVALUATION TIME (WEEKS AFTER INJURY)

6
5
4
3
2
1
0
1

3 5...
HOW EARLY AVN CAN BE
DIAGNOSED ON MRI ?
Traumatic hip dislocation, serial MRI in 14 patients from
injury through 24 months...
ISOTOPE SCANNING OF AVN
With SPECT scanning, the presence of cold
spot is indicative of AVN but diagnostic
sensitivity is ...
18

F-Fluoride PET/CT in Avascular Necrosis of the Femoral Head
Shankalzunnrtht• Gavana. t1BBS,'` Anish Bhattachurrn, DRa1...
Oper Tech Orthop 15:273-279 ©
2005

Hip arthroscopy can help
improve overall diagnostic
accuracy and serve as a
direct mea...
Non-surgical Interventions in AVN

RESTRICTED WEIGHT BEARING
Meta-analysis of protected weight bearing
in 819 patients dem...
1997 early

1997

1997 late

1998

1998

2001

2001
Patient restricted
activity & pain 2007

Opts for THR
AVASCULAR NECROSIS FEMUR
HEAD-EXPERIMENTS
Diagnostic experiments
• Medical management
•

•

Surgical salvage femur head

•...
Non-surgical Interventions in AVN

PHARMACOLOGICAL AGENTS
•

Anabolic steroids
Stanozolol (6mg/day) decreases AVN symptoms...
Hyperoxygenation
mediated relief of
ischaemia enhances
the fibroblastic,
angioblastic and
osteoclastic activities
•
After RPMF treatment, osteogenesis regeneration of
necrotic femoral head markedly improved (micro-CT).
• RPMF could affect...
Surgery can be prevented/deferred
in AVN.
•

•

•

Improvement objective clinical
assessments but also in radiological
par...
Non-surgical Interventions in AVN

BISPHOSPHONATES
Increased resorption contributes
to collapse of the femoral
head.

Expe...
•

ESWT and alendronate produced comparable
result as compared with ESWT without
alendronate in early ONFH. ESWT is effect...
AVASCULAR NECROSIS FEMUR
HEAD-EXPERIMENTS
Diagnostic experiments
• Medical management
•

•

Surgical salvage femur head

•...
Surgical Interventions in AVN
CORE DECOMPRESSION
Meta-analysis of CD in 1206 hips in 24 studies
84% Ficat-I & 65% Stage-II...
CD USING PERCUTANEOUS
MULTIPLE SMALL-DIAMETER DRILLING
•

Multiple small drillings with a 3mm Steinman pin to effectuate
t...
CORE DECOMPRESSION
WITH BMP
Partially purified human BMP combined with
allogeneic antigen-extracted autolyzed human
bone a...
GROWTH FACTORS & GENE THERAPY

•

vascular endothelial growth factor (VEGF)
stimulate angiogenesis and promotes healing.

...
CORE DECOMPRESSION
BONE MARROW AUGMENTATION
Marrow contains
BMP+
Angiogenic factors.
BONE MARROW osteoblast progenitor cel...
Since bone marrow contains
progenitor cells it may be
associated to core
decompression.
It is a simple and easy
adjuvant t...
In 2003 …..DR PR…
48 years male with
Fracture Dislocation
hip in MVA, reduction
in 2 hours but got MRI
at 8 weeks after in...
P R- 8 years FU in 2011
AUTOLOGUS BONE MARROW
GRAFTING OF AVN
•

Hernigou et al (2000, 2002, 2004,
2005) Experience of 189 hips.
No control group,...
BONE MARROW STEM CELL CONC.
•Total

100-180 mL marrow (100
ml Unilateral and 180 for
Bilateral Hip AVN patients)
1.
2.
3.
...
NON-TRAUMATIC AVN
MANAGEMENT CD+BMSC
Idiopathic bil. AVN with 3 months painful hip &
restricted hip ROM
E. FU after 18 months of CD+BMSC, MRI
lesion in healing phase, no edema or effusion
After 6 years FU in 2011
51 AVNFH randomly divided. group A (25) treated with
CD, group B (26) received autologous BMMNC
instillation after CD. Out...
BMSC AFFECT AVN HIP ?
Hernigou et al (2005) Instillation of MNC into the

necrotic area in AVN enhances vascularization an...
case of a patient with bilateral osteonecrosis of the
femoral head treated with autologous cultured
osteoblast injection.
...
CD+ CULTURED OSTEOBLASTS
instillation
Biol Bloril.1 Grr•ro;:• 7i•rnn'yhnrt 14:

1081- 1087 (?O/)S) ) 0('M' .-l merica,, Society for Blood ,n

d .11rn•ro

7 rurr...
BMSCs-seeded BBM combined with rhBMP-2 are
capable of improving the quantity and quality of
new bones to grow in the subch...
local application of traditional
Chinese medicine, Danshen, the
dried root of Salvia miltiorrhiza,
promotes blood flow and...
NON-VASCULARIZED IMPACTION
BONE-GRAFTING
P.S.R. 9 yrs FU

At 18 months
AVN on imaging

R Sen PPT

41
NON-VASCULARIZED BONE-GRAFTING
Removing osteonecrotic bone
impacting autogenous cancellous
bone grafts
Lateral approach
Of...
successful in Ficat and
Arlet stage-III
•

osteonecrosis of the hip
in patients with small- to
medium-sized lesions.
•
LIGHT BULB PROCEDURE

2 years PO

At mean 4 years (range, 3-4.5 years), 18/21 hips clinically
successful result (HHS>80 po...
EXPANDABLE DRILLING SYSTEM&
CURRETTAGE WITH BONE GRAFTING
FREE FIBULAR GRAFTING
survival rate of 59% five years after surgery.
• significant difference (p = 0.002) in survivorship, when
using a clinical...
TRABECULAR METAL AVN
INTERVENTION

metal tantalum (Trabecular Metal) that’s full of pores.
The rod-shaped implant availabl...
QUADRATUS FEMORIS/TFL
MUSCLE PEDICLE GRAFT

(FU >4 years)
•

FU of 10 to 21.5 years
Excellent & good results in
Hospital for Special Surgery
(HSS) score obtained in 100%
of cases i...
VASCULARIZED FIBULAR GRAFTING

Vascularized fibula into osteonecrotic femur head
VASCULARIZED FIBULAR GRAFTING

11 YEARS
FOLLOWUP
•

124 hips, mean FU , 13.9
years; Mean HHS improved
from 72 to 88.

Unchanged radiographs in 37
of 59 hips initially Stag...
VASCULARIZED ILIAC GRAFTING

•
•

35 operations pedicle iliac bone, 28 patients stage II
13/17 hips no collapse deep circu...
BONE GRAFT +
VASCULAR MUSCLE PEDICLE
INTER-TROCHANTERIC OSTEOTOMY

Angular osteotomies best results in young active
patients not on corticosteroids,unilateral ...
TROCHANTERIC ROTATION
OSTEOTOMY

•

Sugioka rotation osteotomy delays hip degradation
• patients with AVN Stage II disease...
OSTEOTOMY+VASCULARIZED GRAFT

•Conversion

to
endopros
avoided in all except one.
•For
advanced and
extensive
osteonecrosi...
CEMENTATION OF FEMORAL HEAD

relying on the fact that the cartilage cells will survive
because the articular cartilage is ...
CEMENTATION OF FEMORAL HEAD
Wood et al. treated 19 patients (20 hips) with open
reduction augmented with methyl methacryla...
AVASCULAR NECROSIS FEMUR
HEAD-EXPERIMENTS

•

Diagnostic experiments

•

Medical management

•

Surgical salvage femur hea...
TOTAL HIP ARTHROPLASTY
AVN vs. OA as Etiology
Failure rate in AVN higher than OA group
(33%);
•

1, Bilateral Occurrence o...
TOTAL HIP ARTHROPLASTY
FOR OSTEONECROSIS
•

Meta-analysis
- Before 1990
•

83% survival

- After 1990
•

97% survival

•

...
MANY CHOICES OF BEARINGS
Metal on polyethylene
• Metal on highly cross linked
polyethylene
• Metal on metal
• Ceramic on c...
TOTAL HIP ARTHROPLASTY
•

Non cemented acetabular
component

•

Porous-coated components

•

THA reliable treatment for
- ...
SURFACE ARTHROPLASTY

Resurfacing of the femoral head successful interim
procedure for Ficat and Arlet stage-III or early
...
PREVENTION OF AVN
STATIN THERAPY
Patients on steroids on mean of 7.5 years
(minimum 5 years), also given lipid clearing ag...
A
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  1. 1. AVASCULAR NECROSIS FEMUR HEAD new experiments Ramesh K Sen MS, DNB Ortho, PhD Professor, Department of Orthopedics Postgraduate Institute of Medical Education and Research CHANDIGARH, INDIA
  2. 2. AVASCULAR NECROSIS FEMUR HEAD-EXPERIMENTS Diagnostic experiments • Medical management • • Surgical salvage femur head • Surgical nonsalvage options
  3. 3. AVN- MRI DIAGNOSIS MRI T1 Image signal from ischemic marrow • Single band like area of low signal intensity. • • 100% sensitivity,98% specificity MRI - T2 image • • • Double Line sign 2nd high signal intensity within the line seen on T1 images. Represents hyper vascular granulation tissue
  4. 4. MRI IN DIAGNOSIS OF AVN Results of a rapid screening protocol (imaging time<1 minute) similar to those of the routine protocol (an imaging time >7 minutes) for patients 99% sensitive, 98% specific May DA, Disler DG. Screening for avascular necrosis of the hip with rapid MRI: preliminary experience. J Comput Assist Tomogr.;24:284-7. 2000
  5. 5. MRI EVALUATION POST HIP DISLOCATION WITH DELAYED RELOCATION MRI EVALUATION TIME (WEEKS AFTER INJURY) 6 5 4 3 2 1 0 1 3 5 7 9 11131517192123 NORMAL NUMBER OF WEEKS AVN Total 13/30 patients showed AVN changes, In 6 patients spotaneous slow resolution in 2 months
  6. 6. HOW EARLY AVN CAN BE DIAGNOSED ON MRI ? Traumatic hip dislocation, serial MRI in 14 patients from injury through 24 months, 5 hips transient within 3 months—4 improved, 3 hips Changes progressed to AVN Not reliable in first week after injury for ischaemia. MRI reliable for AVN marrow changes in 4-6 weeks Poggi JJ, et al Clin Orthop. Oct;(319):249-59 1995 •
  7. 7. ISOTOPE SCANNING OF AVN With SPECT scanning, the presence of cold spot is indicative of AVN but diagnostic sensitivity is 58% & specificity is 78% (Steinberg ME et al 2001)
  8. 8. 18 F-Fluoride PET/CT in Avascular Necrosis of the Femoral Head Shankalzunnrtht• Gavana. t1BBS,'` Anish Bhattachurrn, DRa1. DAR * Rag/iata Kas!tvap, MD. Ralnesh Ktanar Se n, RMS, PhD. and Bha,trant Rai Alittal.:11D. DNB* Abstract: Avascular necrosis REFERENCES (AVN) of the femoral head is a devastating disease in young adults. Magnetic resonance imaging is considered the most sensitive and specific technique in the diagnosis of'this condition. The authors present an interesting image of'bilateral AVN of the femoral heads diagnosed on 1817-fluoride positron emission tomography/computed tomography. 1. Ohzono K, Saito M. Takaoka K, et al. Natural history ofnontraumatic avascular necrosis of the femoral head../ Bone Join Stag Br. 1991;73:68-72. 2. Mont MA, Fairbank AC, Petri M, et W. Core decompression for osteonecrosis of the femoral head in systemic lupus erythematosus. C lin Orthop Relit Rec. 1997; 334:91-97. Kes Vlords: "'F-fluoride, PET/CT, avascular necrosis, femur 3. Smith S' Fehring TK, Griffin WL, et al. Core decompression of the osteonecrotic femoral head../ Bone Joint Surg Ant. 1995;77:674-680. (CYi,, Vucl died 2013.38: e265 e266) 4. Castro FP Jr, Harris MB. Differences in age. laterality, and Steinberg stage at initial presentation in patients with steroid-induced, alcohol-induced, and idio- 40 1r4p 0 To
  9. 9. Oper Tech Orthop 15:273-279 © 2005 Hip arthroscopy can help improve overall diagnostic accuracy and serve as a direct means of treatment or adjunct to the application of more traditional techniques in avascular necrosis management. •
  10. 10. Non-surgical Interventions in AVN RESTRICTED WEIGHT BEARING Meta-analysis of protected weight bearing in 819 patients demonstrated a failure rate of >80% at a mean of 34 months. conservative treatment of osteonecrosis femoral head by protected weight bearing is not appropriate. Mont MA, Carbone JJ, Fairbank AC. Clin Orthop Relat Res.;324:169-78. 1996
  11. 11. 1997 early 1997 1997 late 1998 1998 2001 2001
  12. 12. Patient restricted activity & pain 2007 Opts for THR
  13. 13. AVASCULAR NECROSIS FEMUR HEAD-EXPERIMENTS Diagnostic experiments • Medical management • • Surgical salvage femur head • Surgical nonsalvage options
  14. 14. Non-surgical Interventions in AVN PHARMACOLOGICAL AGENTS • Anabolic steroids Stanozolol (6mg/day) decreases AVN symptoms at 1 year following treatment. Glueck et al. Am J Hematol.;48:213-20. 1995 • Enoxaparin On 60 mg/day for 12 weeks, 89% did not require surgery Glueck et al CORR;435:164-70 2005 • Iloprost - prostacyclin derivative a vasodilator, usedul in AVN FH & BMES. Disch et al,J Bone Joint Surg Br.;87:560-4. 2005
  15. 15. Hyperoxygenation mediated relief of ischaemia enhances the fibroblastic, angioblastic and osteoclastic activities •
  16. 16. After RPMF treatment, osteogenesis regeneration of necrotic femoral head markedly improved (micro-CT). • RPMF could affect various critical aspects in the course of femoral head necrosis, a promising measure in the treatment of avn of femoral head, in the early stage. •
  17. 17. Surgery can be prevented/deferred in AVN. • • • Improvement objective clinical assessments but also in radiological parameters. a trial of alendronate for all patients with early AVN of the hip, i.e. stages I and II and early stage III will be beneficial.
  18. 18. Non-surgical Interventions in AVN BISPHOSPHONATES Increased resorption contributes to collapse of the femoral head. Experimental studies: Alendronate Inhibits osteoclast activity & thus curtail bone resorption. Tagil et al. in rats Acta Orthop Scand.; 75:756-61. 2004 Bowers et al. in canines. J Surg Orthop Adv.;13:210-6. 2004 Kimet al, in immature pigs. J B J S Am.;87:550-7, 2005. Clinical studies: Lai et al, J Bone Joint Surg Am.;87:2155-9. 2005
  19. 19. • ESWT and alendronate produced comparable result as compared with ESWT without alendronate in early ONFH. ESWT is effective with or without the concurrent use of alendronate.
  20. 20. AVASCULAR NECROSIS FEMUR HEAD-EXPERIMENTS Diagnostic experiments • Medical management • • Surgical salvage femur head • Surgical nonsalvage options ARCO meeting Chicago March 2013
  21. 21. Surgical Interventions in AVN CORE DECOMPRESSION Meta-analysis of CD in 1206 hips in 24 studies 84% Ficat-I & 65% Stage-II had successful result. 22 studies: success rate of CD significantly higher than that of conservative treatment for early-stage disease (p < 0.05) Castro FP Jr, Barrack RL.. Am J Orthop.;29:187-94. 2000
  22. 22. CD USING PERCUTANEOUS MULTIPLE SMALL-DIAMETER DRILLING • Multiple small drillings with a 3mm Steinman pin to effectuate the core decompression. Successful outcomes in: 24/30 Stage I hips (80%;23 patients) had • 8/15 Stage II hips (57%; 12 patients) • Mont MA et al Clin Orthop Relat Res. Dec;(429):131-8, 2004
  23. 23. CORE DECOMPRESSION WITH BMP Partially purified human BMP combined with allogeneic antigen-extracted autolyzed human bone and introduced CD. At a mean of 53 months, 14/17 hips showed a clinical success, with HHS of >80 points and no patient requiring conversion to a total hip replacement. Lieberman JR, Conduah A, Urist MR. Treatment of osteonecrosis of the femoral head with core decompression and human bone morphogenetic protein. Clin Orthop Relat Res.;429:139-45. 2004
  24. 24. GROWTH FACTORS & GENE THERAPY • vascular endothelial growth factor (VEGF) stimulate angiogenesis and promotes healing. use of a recombinant plasmid pCD-hVEGF165 mixed with collagen for the treatment of an animal model of osteonecrosis • new bone was observed in the channel of the drill hole and on the surface of the dead trabeculae.
  25. 25. CORE DECOMPRESSION BONE MARROW AUGMENTATION Marrow contains BMP+ Angiogenic factors. BONE MARROW osteoblast progenitor cells from pluri-potential connective-tissue stem cells proliferate to form colonies that express AKP & subsequently, a mature osteoblastic phenotype
  26. 26. Since bone marrow contains progenitor cells it may be associated to core decompression. It is a simple and easy adjuvant to core decompression.
  27. 27. In 2003 …..DR PR… 48 years male with Fracture Dislocation hip in MVA, reduction in 2 hours but got MRI at 8 weeks after injury
  28. 28. P R- 8 years FU in 2011
  29. 29. AUTOLOGUS BONE MARROW GRAFTING OF AVN • Hernigou et al (2000, 2002, 2004, 2005) Experience of 189 hips. No control group, surgical technique variable. Gangii V et al JBJS Am. Jun; 86A(6):1153-60 2004 Experience of BMSC+CD in 10 AVN hips, compared 8 controls with CD.
  30. 30. BONE MARROW STEM CELL CONC. •Total 100-180 mL marrow (100 ml Unilateral and 180 for Bilateral Hip AVN patients) 1. 2. 3. 4. 5. Ficoll layering on marrow in 1:3 ratio Centrifuged at speed 400/m for 30 min. at 250C. Plasma layer aspirated, discarded BMSC into another sterile tube + PBS buffer Washed thrice re-suspension in 2.5 ml buffer. BMSC content : mononuclear stem cells + monocytes, lymphocytes, PMNs (MNC count with CD34+ more than 5X107 )
  31. 31. NON-TRAUMATIC AVN MANAGEMENT CD+BMSC Idiopathic bil. AVN with 3 months painful hip & restricted hip ROM
  32. 32. E. FU after 18 months of CD+BMSC, MRI lesion in healing phase, no edema or effusion
  33. 33. After 6 years FU in 2011
  34. 34. 51 AVNFH randomly divided. group A (25) treated with CD, group B (26) received autologous BMMNC instillation after CD. Outcome compared clinically (HHS), x-ray and MRI, & by Kaplan-Meier hip survival analysis at 12 & 24 months FU Clinical score & mean hip survival better in group B than in group A (p<0.05). •
  35. 35. BMSC AFFECT AVN HIP ? Hernigou et al (2005) Instillation of MNC into the necrotic area in AVN enhances vascularization and the oxygen flow to the ischemic tissues Tzaribachev et al (2008) autologous MSCs could potentially complement AVN treatment by adding fresh "osteogenic cells" to the healing process.
  36. 36. case of a patient with bilateral osteonecrosis of the femoral head treated with autologous cultured osteoblast injection. • Experience is limited to one patient, autologous cultured osteoblast transplantation appears to be effective for treating the osteonecrosis of femoral head. •
  37. 37. CD+ CULTURED OSTEOBLASTS instillation
  38. 38. Biol Bloril.1 Grr•ro;:• 7i•rnn'yhnrt 14: 1081- 1087 (?O/)S) ) 0('M' .-l merica,, Society for Blood ,n d .11rn•ro 7 rurr+pLiit rti ; i REVIEW Cell-Based Therapies for Osteonecrosis of the Femoral Head CeI Iular- Based Therapy for Osteonecrosis B. Jones, 1'3 Tara Seshadri,2'3 Roselynn Krantz,2 Armand Keating, 2,3 Peter C. Ferguson 1'3 CORE DECOMPRESSION WITH MARROW STEM CELLS Valerie Gangji, MD, PhDa•*, Jean-Philippe Hauzeur, MD, PhDb KEYWORDS • Osteonecrosis • Bone marrow • Stem cell 0-I LI==E HERN GC.,, MD CL `e FP. `,IAN -CM. L'D. A_EXANDRE -OISNARD. P.O. ALEXIS NOGIER. MD. nACLO FlLIR?INl. MC. and LID A CE ABR MD • Cellular therapy Treatment of Osteonecrosis of the Femoral Head with Implantation of Autologous Bone-MIarrow Cells V'ale:ie Craaj3 and :ear-?_:ippe Hauzeur j Bone join Surg. Am. 8-.106-111.2005. do::102106 JBJS.D.02662 hoN . ASPECTS OF CURRENT MANAGEMENT „• The use of percutaneous autologous bone marrow transplantation in nonunion and avascular necrosis of bone P. Hcmigou, A. Poignard. 0. Manicom, Bone marow and orthopaedic surgery Burwell' showed that primitive ostcogcni. During the development of normal bone in the cells in bone marrow are responsible for much young child, osteoblasts and then haematopoi- of the biological efficacy of cancdloua bone
  39. 39. BMSCs-seeded BBM combined with rhBMP-2 are capable of improving the quantity and quality of new bones to grow in the subchondral defects of the femoral head, and repairing early-stage osteonecrosis of the femoral head in rabbits.
  40. 40. local application of traditional Chinese medicine, Danshen, the dried root of Salvia miltiorrhiza, promotes blood flow and resolves blood stasis. also provides mechanic buttress in the weight loading • • minimal invasion surgery for ischemic necrosis of the femoral head at Stages I, II and III of ARCO.
  41. 41. NON-VASCULARIZED IMPACTION BONE-GRAFTING P.S.R. 9 yrs FU At 18 months AVN on imaging R Sen PPT 41
  42. 42. NON-VASCULARIZED BONE-GRAFTING Removing osteonecrotic bone impacting autogenous cancellous bone grafts Lateral approach Of 28 hips followed for a 42 months Of 18/20 hips survived, successful result (minimal pain) 70% no progression Rijnen WH, Gardeniers JW, Buma P, Yamano K, Slooff TJ, Schreurs BW. Treatment of femoral head osteonecrosis using bone impaction grafting. Clin Orthop Relat Res.;417:74-83. 2003
  43. 43. successful in Ficat and Arlet stage-III • osteonecrosis of the hip in patients with small- to medium-sized lesions. •
  44. 44. LIGHT BULB PROCEDURE 2 years PO At mean 4 years (range, 3-4.5 years), 18/21 hips clinically successful result (HHS>80 points , no additional procedures). Mont MA, Etienne G, Ragland PS. Outcome of non-vascularized bone grafting for osteonecrosis of the femoral head. Clin Orthop Relat Res.;417:84-92. 2003
  45. 45. EXPANDABLE DRILLING SYSTEM& CURRETTAGE WITH BONE GRAFTING
  46. 46. FREE FIBULAR GRAFTING
  47. 47. survival rate of 59% five years after surgery. • significant difference (p = 0.002) in survivorship, when using a clinical and radiological end-point, between the two grafts, in favour of the tibial autograft. •
  48. 48. TRABECULAR METAL AVN INTERVENTION metal tantalum (Trabecular Metal) that’s full of pores. The rod-shaped implant available in various lengths. has threads at the end of the rod away from the hip that screw into healthy bone on the outer edge of the femur
  49. 49. QUADRATUS FEMORIS/TFL MUSCLE PEDICLE GRAFT (FU >4 years)
  50. 50. • FU of 10 to 21.5 years Excellent & good results in Hospital for Special Surgery (HSS) score obtained in 100% of cases in Stage I, 92% in Stage II and 80.4% in stage III, with a survivorship of 91% in Stage II and 82% in Stage III cases.
  51. 51. VASCULARIZED FIBULAR GRAFTING Vascularized fibula into osteonecrotic femur head
  52. 52. VASCULARIZED FIBULAR GRAFTING 11 YEARS FOLLOWUP
  53. 53. • 124 hips, mean FU , 13.9 years; Mean HHS improved from 72 to 88. Unchanged radiographs in 37 of 59 hips initially Stage II hips and 39 of 65 Stage III hips. Thirteen hips (13 patients) (10.5%) failed treatment and underwent total hip arthroplasty. •
  54. 54. VASCULARIZED ILIAC GRAFTING • • 35 operations pedicle iliac bone, 28 patients stage II 13/17 hips no collapse deep circumflex iliac pedicle bone graft indicated for stage 2 type C-1 necrosis, Nagoya et al, Predictive factors for vascularized iliac bone graft for non-traumatic osteonecrosis of the femoral head. J Orthop Sci.;9(6):566-70. 2004
  55. 55. BONE GRAFT + VASCULAR MUSCLE PEDICLE
  56. 56. INTER-TROCHANTERIC OSTEOTOMY Angular osteotomies best results in young active patients not on corticosteroids,unilateral involvement with a good preoperative ROM of hip, and a small lesion without collapse. 96% success at 3-26 years postoperatively Mont et al (76%) a good or excellent result, and nine (24%) had a fair or poor result
  57. 57. TROCHANTERIC ROTATION OSTEOTOMY • Sugioka rotation osteotomy delays hip degradation • patients with AVN Stage II disease. may be a role in selected patients, difficult to perform and a high potential for morbidity, including nonunion Results variable, with success rates around 40% Shannon BD, Trousdale RT. Femoral osteotomies for avascular necrosis of the femoral head. Clin Orthop Relat Res.;418:34-40. 2004
  58. 58. OSTEOTOMY+VASCULARIZED GRAFT •Conversion to endopros avoided in all except one. •For advanced and extensive osteonecrosis of the femoral head, especially in young patients, to preserve the joint. •Relatively complex procedure.
  59. 59. CEMENTATION OF FEMORAL HEAD relying on the fact that the cartilage cells will survive because the articular cartilage is nourished by the synovial fluid Ph. HERNIGOU, D. GOUTALLIER :, Ed. J. Arlet, B. Mazieres, Springer Verlag, 353-355. 1990
  60. 60. CEMENTATION OF FEMORAL HEAD Wood et al. treated 19 patients (20 hips) with open reduction augmented with methyl methacrylate cement and followed them for 6 months to 12 years. 3 patients had a conversion to a THR The long-term results of this procedure are unknown. Wood ML, McDowell CM, Kerstetter TL, Kelley SS. Open reduction and cementation for femoral head fracture secondary to avascular necrosis: preliminary report. Iowa Orthop J. 2000;20:17-23.
  61. 61. AVASCULAR NECROSIS FEMUR HEAD-EXPERIMENTS • Diagnostic experiments • Medical management • Surgical salvage femur head • Surgical non-salvage options
  62. 62. TOTAL HIP ARTHROPLASTY AVN vs. OA as Etiology Failure rate in AVN higher than OA group (33%); • 1, Bilateral Occurrence of the disease with bilateral THA 2, Extensive bone necrosis • Femoral component loosening more frequently in the ON (28%) than in the OA group (5%).
  63. 63. TOTAL HIP ARTHROPLASTY FOR OSTEONECROSIS • Meta-analysis - Before 1990 • 83% survival - After 1990 • 97% survival • Second generation cementing techniques • Proximally coated femoral stems
  64. 64. MANY CHOICES OF BEARINGS Metal on polyethylene • Metal on highly cross linked polyethylene • Metal on metal • Ceramic on ceramic • Ceramic on metal • Ceramic on polyethylene • Which is better for osteonecrosis??
  65. 65. TOTAL HIP ARTHROPLASTY • Non cemented acetabular component • Porous-coated components • THA reliable treatment for - patients >45 years of age - In patients with post-traumatic necrosis
  66. 66. SURFACE ARTHROPLASTY Resurfacing of the femoral head successful interim procedure for Ficat and Arlet stage-III or early stage-IV disease HUNGERFORD et al JBJS 80:1656-64 (1998)
  67. 67. PREVENTION OF AVN STATIN THERAPY Patients on steroids on mean of 7.5 years (minimum 5 years), also given lipid clearing agents that reduce lipid levels. Osteonecrosis in only 3 (1%) of 284 patients who were taking high-dose corticosteroids + statin drugs Statins might offer protection against AVN when corticosteroid treatment is necessary Pritchett JW. CORR ;386:173-8 2001
  68. 68. A
  69. 69. Thank You
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