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Hallux Valgus
Updated: May 5 2015

[Blocked from Release] Lapidus Procedure First TMT Fusion

Preoperative Patient Care
Operative Techniques
E

Preoperative Plan

1

Template arthrodesis with radiographs

2

Execute surgical walkthrough

  • describe the steps of the procedure verbally to the attending prior to the start of the case
  • describe potential complications and steps to avoid them
F

Room Preparation

1

Surgical instrumentation

  • compression screws

2

Room setup and equipment

  • standard OR table with radiolucent end

3

Patient positioning

  • supine position with a bump under the ipsilateral buttock
G

Approach

1

Mark and make the incision

  • make a 6 cm incision over the dorsum of the first TMT joint
  • identify the interval between the EHL and the EHB

2

Expose of the Joint

  • incise the capsule over the first and second TMT joints
  • release the capsule along the medial and lateral aspect of the capsule
H

Joint Preparation

1

Prepare the joint for fusion

  • remove the articular surface of the first TMT joint using small osteotomes and rongeurs
  • if the first metatarsal is shortened then remove only the articular cartilage
  • if the metatarsal is long then remove a small laterally based wedge from the medial cuneiform
  • if the first metatarsal needs to be plantar flexed then perform a plantar based osteotomy
  • perforate the subchondral bone with a 2 mm drill
  • expose and decorticate the medial aspect of the base of the second metatarsal and the lateral base of the first metatarsal
I

Lateral Soft Tissue Release

1

Make the second incision

  • make a 2 cm incision over the first web space

2

Identify significant structures

  • identify the adductor hallucis tendon using blunt dissection
  • identify and protect the terminal branch of the deep peroneal nerve

3

Complete the lateral release

  • incise the adductor hallucis tendon at the lateral aspect of the fibular sesamoid
  • incise the lateral capsule longitudinally for reduction of the sesamoid
  • force the MTP joint into varus to complete the lateral releases
J

Medial Exostectomy

1

Make the medial incision

  • make a direct medial incision over the first MTP joint

2

Incise the capsule

  • incise the capsule in line with the incision
  • if needed remove a wedge of capsule to facilitate the reduction of the sesamoid

3

Remove any residual prominence

K

Reduction and Fixation

1

Reduce the metatarsal to the appropriate position

  • reduce the first metatarsal so that its parallel to the second metatarsal
  • confirm that the metatarsal is parallel and properly rotated

2

Place compression screws

  • use a compression technique to place a 3.5 mm cortical screw across the first TMT joint from proximal to distal
  • place a second 3.5 mm cortical screw from the medial aspect of the base of the first metatarsal into the base of the second metatarsal

3

Place bone graft

  • place any bone graft that was obtained from removal of the medial prominence into the first –second intermetatarsal space to augment the fusion

4

Confirm reduction and fixation

  • use intraoperative imaging to confirm the screw placement and the reduction
L

Capsule Repair

1

Close the medial capsule

  • use absorbable sutures and perform a medial capsulectomy
  • it should not be needed to overtighten the capsule to maintain alignment of the MTP joint
N

Wound Closure

1

Irrigation and Hemostasis

  • copiously irrigate the wound

2

Superficial wound closure

  • use 3-0 vicryl for subcutaneous tissue
  • use 3-0 monocryl for skin

3

Dressing

  • place a slipper great toe spica fiberglass cast
Postoperative Patient Care
Private Note