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Hallux Limitus (Surgery) Flashcards

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1
Q

What’s the value for normal

1st MPJ dorsiflexion?

1st MPJ plantarflexion?

A

Dorsiflexion: 65 degrees

Plantarflexion: 20 degrees

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2
Q

Frequency of Hallux limitus?

1?

In bilateral 2?

Women ratio 3?

A
  1. 2nd most common after HV
  2. 98% of pts had a family history
  3. 62%
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3
Q

What are the syptoms for Hallux limitus?

1?

2?

3?

4?

5?

A
  1. Pain from impingment of dorsal osteophyte
  2. ROM pain due to irregularity of the articular artilage surface
  3. Pain from inflammation
  4. Pain from shoe related pressure on prominant oteophytes
  5. Pain form irritation of dorsal cutaneous nerves
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4
Q

What are some of the Aiteologies for Hallux limitus?

1?

2?

3?

4?

5?

6?

A
  1. Pes Valgus-Hypermobility of 1st ray
  2. Metatarsus primus elevatus: Hallux equinus
  3. Long 1st metatarsal/ Short 1st metatarsal
  4. Varus deformity: Forefoot/ Rearfoot
  5. Trauma- micro/macro
  6. Immobalisation
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5
Q

What aresome of the Sytemic Aetiology for Hallux limitus?

1?

2?

3?

4?

5?

A
  1. Gouty Arthritis
  2. Osteoarthritis
  3. Rheumatoid arthritis
  4. Neuromuscular disorders
  5. Iatrogenic causes
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6
Q

Metatarsus Primus Elevatus

Primary MPE

1?

2?

A
  1. Secondary to proximal varus deformity
  2. Hallux equinus subsequently develops to afford medial
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7
Q

Secondary MPE

results from 1?

A
  1. retrograde effects of hallux equinus on 1st met head in pes valgus
  2. Hypermobility 1st ray
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8
Q

How do you differentiate between primary and secondary primus elevatus?

1?

2?

A
  1. Evaluation of weight bearing and non weight bearing
  2. Compare standard lateral to lateral using “forefoot block” test with digits suspended off weight bearing surface
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9
Q

Radiographic measurment for Metatarsus Primus Elevatus

Normally, dorsal cortex of 1st and 2nd metatarsal shaft are 1?

Measure 2?

A
  1. Parallel
  2. Angular divergence between 1st and 2nd metatarsals
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10
Q

Osteochondritis Dissecans

Osteochondral 1?

2 erosion?

Main cause 3?

4?

5 x-rays?

A
  1. fracture
  2. 1st MPJ central and dorsal articular artilage erosion 1st MH
  3. Cause
  4. Fragmentation with cleavage lesion
  5. x-rays may not demonstrate lesion
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11
Q

What are the consequences for progressive osteoarthritis?

Gradual 1.?

2.? Proliferation

3? narrowing

  1. ? flattening
  2. ? lesion

6? findings more extensive

A
  1. Joint destruction
  2. Osteophyte
  3. Joint space narrowing
  4. Articular surface
  5. Cystic subchondral
  6. Intra-operative
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12
Q

Subchondral cyst

Common feature of 1?

Resulting from 2?

Chracateristics 3?

Accompanying features 4?

A
  1. OA
  2. Stress/Pressure
  3. Multiple and Radiolucent with a surrounding sclerotic margin
  4. Joint space narrowing and bone sclerosis
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13
Q
  1. Where is the axis of rotation for hallux?
  2. What motion does this axis allow for?
A
  1. located centrally within the 1st metatarsal head
  2. Allows for sagittal plane gliding motion of stabalised hallux on rotating metatarsal head
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14
Q

In hallux limitus, where is the axis transferred to 1?

what does this lead to 2?

A
  1. Axis of rotation converted to plantar hinge which is at the level of the sesamoidphalangeal ligament
  2. Leads to dorsal impingment and osteophytic formation
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15
Q

Radiographic Grading

What are the characteristics for Grade I of Hallux limitus?

1?

2?

3?

4?

A
  1. Functional limitation of dorsiflexion
  2. Mild dorsal spurring
  3. Pain from dorsal hypertrophy
  4. No structural sesamoid disease
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16
Q

Radiographic Grading

What are the charachteristics of Grade II hallux limitus?

1?

2?

3?

4?

5?

Study These Flashcards
A

1. Broadening and flattening of 1st met head and base of proximal phalanx

2. Joint space narrowing

3. Structural 1st ray elevatus

4. Osteochondral defect

5. Sesamoid hypertrophy

17
Q

Radiographic Grading

What are the characteristics of Grade III?

1?

2?

3?

4?

5?

Study These Flashcards
A

1. Severe loss of joint space

2. Extensive spurring

  1.  Osteochondral defects of
  2. metatarsal head +/-proximal
  3. phalanx +/- joint mice
  4.  Extensive sesamoid hypertrophy and loss of joint space

7. Near ankylosis

18
Q

What are the surgical procedures for Hallux limitus:

  1. ?
  2. ?
  3. ?
Study These Flashcards
A
  1. Cheilectomy
  2. Joint destructive
  3. Osteotomies
19
Q

What are the different methods for the joint dstructive surgical procedure for hallux limitus?

1?

2?

3?

Study These Flashcards
A

1. Keller

  1.  1st mpj arthrodesis
  2.  Joint implant
20
Q

What is an stepwise surgical approach for hallux limitus?

  1. Addresses ?
  2. Aim to create ?
Study These Flashcards
A
  1. soft tissue as well as osseous pathology

2. pain free improved ROM 1st mpj

21
Q

Some facts about Cheiectomy:

 Important 1?

 Need to carefully inspetc 2?

 Removal of 3?

 Abrasion arthroplasty or subcondral drilling to encourage 4?

 Good long term success rate with grade 5?

Study These Flashcards
A
  1. first step in increasing ROM
  2. articular cartilage
  3. loose cartilage
  4. encourage formation of pseudocartilage
  5. Grade I and II
22
Q

More facts about Cheilectomy:

Remove and smooth 1?

 Limited application as 2?

 Combine with 3?

Study These Flashcards
A
  1. first met head and base proximal phalanx
  2. Sole procedure
  3. Capsular inter-positional graft
23
Q

Joint Destructive Procedures:

 Keller arthroplasty:

 Good procedure for 1?

 Arthrodesis of 1st mpj:

 Provides predictable 2?

 Implant arthroplasty:

 Single or two component

Study These Flashcards
A
  1. end stage HL deformity
  2. Stability to 1st mpj and hallux complex
  3. implants
24
Q

1st MPJ Arthrodesis

1? treatment

 Obliterates 2?

 Ideal for stage 3?

 Can yield consistently to 4?

Study These Flashcards
A
  1. End stage
  2. motion
  3. III HL
  4. good results
25
What's does the **1st MPJ arthrodesis** procedure involve?  Removal of all 1? Devices 2? Fenestrate 3? to encourage 4?
1. cartilage from 1st metatarsal head and base proximal phalanx 2. Sagittal saw, Ronguer/bone curette, Conical reamer system 3. subchondral bone with 1.6mm K-wire 4. bleeding
26
What is the alternative fixation technique:
Stable internal fixation  Crossed K-wires  Parallel K-wires  Single A-O screw  Crossed A-O screws
27
**1st MPJ Arthrodesis**  After care 1?  Limitations 2?  Complications 3?
1. BK cast or post-op shoe for 4-6/52 2. No more high heeled footwear 3. Delayed healing, Non-union, Improper position
28
Some facts about **joint implants**:  Better in 1?  Hemi or double  Complications 2?  Hallux malleus
1. Theory than in practice:  Lifespan of implants 2. Infection, Implant failure, Need for removal
29
What is the technique involved for **Joint implant surgery**?  Removal of 1?  Creation of 2?  Selection of 3?  Suturing of 4?  Insertion of 5?
1. bone 2. Holes 3. trial implant 4. flexor plate to base prox phalanx 5. implant
30
**Moberg osteotomy** 1? osteotomy Cheilectomy 2?  Decompression anddorsiflexion 3?
1. phalangeal osteotomy 2. 1st MH 3. Osteotomy proximal phalanx
31
**Moberg osteotomy** 1? skin incision 2? exposed
1. Medial 2. Capsule inside joint
32
**Moberg Osteotomy** Make 1? first, then 2? why? Drill holes with 3? Thread 4?
1. proximal osteotomy 2. distal osteotomy 3. 1.4 mm K-wire 4. stainless steel wire
33
**Moberg procedure**  **After-care**:  Post-op sandal 1?  Co-plus wrap 2?  **Possible complications:**  Avoid 3? 4? 5? 6?
1. 4-6/52 2. 4/52 3. Over tightening wire sutures 4. Fracture plantar hinge 5.  Delayed/non-union 6. AVN base proximal phalanx
34
**1st Metatarsal Osteotomies**  Distal osteotomies:  Useful in 1?  Obtain 2? ** Youngswick**- modification of 3?  Plantarflexory basal osteotomies:  Lambrinudi  Sagittal Z  Waterman
1. Mild-moderate metatarsus primus elevatus 2. shortening and plantar flexion of capital fragment 3. Austin (1982)
35
 **Youngswick Osteotomy/Modified Watermann** Modification 1? 2? 1st ray  Fixated with 3?  Ambulatory procedure Stage 4? 5? loss of joint cartilage Indications 6? 7?
1. Austin osteotomy 2.  Plantar-flexes and shortens 3. screw or Kwire/s 4. I or II HL 5. \< 50% 6. Age \< 75 years 7.  Good bone density
36
**Proximal osteotomies:**  After care:  Non-weight bearing for 1? B-K cast  Careful 2?  Less surgery at MPJ level - less surgical scarring around joint  Complications 3?
1. 6-8 weeks 2. ROM exercises 3. Need for nwb immobilisation  MPE  Delayed/non-union  Reduced ROM 1st mpj

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