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Flashcards in Hallux Valgus (Surgery Unit) Deck (42)
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Radiographic measurments:

1st metatarsal protrusion distance

Normal value A

What is it? Relative B


A: +/- 2 mm

B: Difference in radii of longitudinal bisections of 1st and 2nd metatarsals



Radiographic measurment 

Metatarsus Primus Adductus Angle

normal A

B is associated with HV development in rectus feet 

C in metatarsus adductus feet 



A: 8 degrees

B: 12 degrees 

C: > 8 degrees



Hallux abductus angle

HAA normal A



A: 10-20 degrees 


Tibial sesamoid position 

Normal : A

Relative position of B in relation to the C of 1st metatarsal 



A: 4 

B: medial sesamoid

C: bisection 




1st metatrsophalangeal position

How does 

Normal     Deviated     Subluxed

look like?




Surgical management for hallux valgus depends on ?

  1. Degree of A
  2. B of deformity 
  3. C
  4. D mechanics
  5. Other factors


  1. A: deformity 
  2. B: Nature
  3. C: Physiological age
  4. D: Foot
  5. General health, Co-morbidity, Home support 



What are the different classifications for hallux valgus surgery?

  1. A
  2. B
  3. C
  4. D
  5. E


A: Bupectomy : medial bump, head of 1st head

B: Arthroplasty/ joint implant

C: Osteotomy of hallux

D: first metatarsal osteotomies : distal and proximal 

E: Fusion procedures: 1st mtpj and 1st met-cuniform 






Removal of A

Reinforcment of B



A: Medial exostosis

B: Medial capsule




Silver bunionectomy

What are the indications for silver bunionectomy?

  1. A
  2. B
  3. C
  4. D
  5. E

Bump pain

  1. Bupm pain 
  2. No sesamoid or joint pain 
  3. Good ROM 
  4. No pain or crepitus with ROM examination 
  5. Elderly patients (Osteoprosis)




Silver bunionectomy

Advantages                                                        Disadvantages

  1. A post-op recovery                              1. Weakens E
  2. B post-op oedema                               2. poor F
  3. C procedure                                         3. Fails to correct G
  4. May be performed in pt with D



  1. A: Rapid                                            1. E: medial aspect of 1st mpj
  2. B: Minimal                                        2. F: long term prognosis
  3. C: Simple                                          3. Structural aetiology 
  4. D: Osteoprosis



Mcbride Nubionectomy

A ostectomy

B sesamoidectomy

+/- Transfer of C tendon dorsally to D  




A 1st metatarsal

B Lateral 

C adductor hallucis D medial capsule 



Bumpectomy-McBride bunionectomy

What are the indications for this procedure?

  1. No A
  2. Pain associated with the B
  3. Adequate C
  4. Mild D
  5. E medial eminence
  6. Deviated to F
  7. H

  1. A : pain or creptus with ROM 1st mpj
  2. B: lateral sesamoid 
  3. C: ROM 1st mpj
  4. D: Mild axial rotation hallux
  5. E: Hypertrophy 
  6. F: Subluxed 1st mpj
  7. H: TSP>4
  8. Elderly patients (osteoprosis) 



McBride bunionectomy 

What are the advantages?

  1. Relatively A
  2. More B than Silver
  3. May be performed with patients with C


A: Simple

B: Corrective

C: Osteoprosis





Mcbride bunionectomy

What are the disadvatnages of this procedure?

  1. Fails to correct A
  2. High incidence of either B



  1. A: structural aetiology 
  2. B: Hallux valgus



For both Silver and Mcbride buionectomies what are the Post-op course of action?

  1. Patient wears post-op shoe for A
  2. Return to B ASAP
  3. Wise to use C for 1-2/12 to assist maintaning correction of D
  4. Minimal E compared to other bunionectomies 



  1. A: 2-3 weeks
  2. B: normal activities
  3. C: IDW D: HAA
  4. E: morbidity 


Arthroplasty/ Joint implant

Keller bunionectomy

Gap arthoplasty 1st MPJ

A removed which is paralled to the shaft 

B fixation 2-4/52

Suture C to plantar aspect proximal phalanx 

Best reserved for D patients or E 




A: 1/3rd- 1/2 base proximal phalanx

B: 1.6 mm K-wire 


D: geriatric patients

E: endstage hallux limitus 





Joint implant

Advantages:                                                Disadvantages:

  1. A                                                          1. weakens B
  2. C recovery                                          2. secondary D
  3. E ROM                                                          
  4. Eliminated F


  1. A: simple                                          1. B: purchase strength of hallux
  2. C: rapid                                            2. D: central metatarsalgia 
  3. E: Restores
  4. F: O/A pain 



What are the post-op course of action for Arthroplasty/Joint implant?

  1. wears A 
  2. Relatively B
  3. May need to use C 


  1. A: post-op shoes while k-wires are in situ (The wires might bend)
  2. B: early return to normal activity 
  3. C: IDW postoperatively for a period of surgery was for HV



Akin Bunionectomy 

Distal Akin 

Used to correct

Rarely performed as B


Fixate with D 

E procedure 

* distal would have more effect on joint angulation that proximal phalanx





A: high DASA

B: Single procedure

C: prxoximal phalanx

D: ss wire, staple, K-wire, screw

E: Ambulatory 



Proximal Akin 

Used to correct A

Minimal B present

Shortens C 

D must be closed 


A : high PASA

B: valgus rotation 

C: proximal pahalnx

D: Epiphysis proximal phalanx



Proximal Akin 

Technique / Procedure :

A parallel to base

B perpendicular longitudinal axis proximal phalanx

C Fixation 



A: Proximal cut 

B: Distal cut 

C: Internal 



Proximal Akin 

Post-op course 

osteotomy takes A to unite

Protect in B for C

Support with Coban bandage of hallux for further


A: 6-8 weeks

B: Post-op shoes / C:4/52

D: 2-4/52 



What is the most commonly performed bunionectomy performed today?

A: ? 



A: Austin bunionectomy




What are the indications for Austin procedure?

A HV deformity 

MPA angle of B

Age C

D bone density 



A: Mild-moderate

B: 12-20 degrees

C: 14-75 years old

D: Good 



What is the first step of the Austin procedure?

A tenoctomy

Release of B 


A: Adductor hallucis

B: lateral sesamoidal ligament




What is the 2nd step for Austin procedure? 


Inverted 'L' shaped capsulotomy 




What are the 3rd and 4th steps in Austin procedure?

3rd: Inspection of A

4th: Removal of


A: metatarsal head

B: Medial eminenece 



What is the next step after removal of the medial eminence in Austin procedure? 



"V" osteotomy and insertion of K wire at the apex of the V to hold 

the bone temporarly until they put the screw in 




What is the next step after "V" osteotomy in the Austin procedure?



Lateral re-positioning of the 1st met head 

and then the removal of prominance metatarsal neck 

and fixation




What are the advantages for Austin procedure?

A osteotomy

Good B (low incidence of C)

Can D ( reduce incidence of lesser metatarsalgia)

Technically E 


A: Stable

B: bone to bone      C: AVN

D: plantarflex/shorten 

E: easy