Skip to main content
main-content
Top

Tip

Swipe om te navigeren naar een ander artikel

Gepubliceerd in: Journal of Foot and Ankle Research 1/2012

Open Access 01-12-2012 | Oral presentation

Plantar pressures and ankle kinematics following anterior tibialis tendon transfers in children with clubfoot

Auteurs: Kirsten Tulchin, Kelly A Jeans, Lori A Karol, Lindsey Crawford

Gepubliceerd in: Journal of Foot and Ankle Research | bijlage 1/2012

share
DELEN

Deel dit onderdeel of sectie (kopieer de link)

  • Optie A:
    Klik op de rechtermuisknop op de link en selecteer de optie “linkadres kopiëren”
  • Optie B:
    Deel de link per e-mail
insite
ZOEKEN

Background

Relapses following nonoperative treatment for clubfoot occur in 29-37% of feet following initial correction [1]. In patients with residual clubfoot deformity, excessive medial pull of the anterior tibialis muscle can lead to persistent supination and inversion of the forefoot [1]. The purpose of this study was to assess kinematic and plantar pressure changes following an ATT transfer.

Materials and methods

Thirty children (37 feet) were evaluated pre- and 2.0±0.6 yrs (range: 0.8 to 2.9) post-op following ATT transfer. Foot progression angle (FPA) and sagittal ankle kinematics were assessed using a VICON system. Plantar pressures were collected using the Emed ST Platform. Representative trials were chosen for each subject for gait and plantar pressures. Plantar pressures were divided into medial and lateral hindfoot, midfoot and forefoot. Variables included: contact time (CT%), contact area (CA% total), peak pressure (PP), hindfoot-forefoot angle [2], deviation of the center-of-pressure (COP) line and region of initial contact. Twenty age matched controls were used for comparison.

Results

Changes in plantar measures in the hindfoot show normalization of the CA% and CT% post-op (Table 1). The forefoot shows the most change with a significant decrease in CA%, CT% and PP in the lateral forefoot, redistributed to the first metatarsal for more even distribution through the foot. Initial contact was not different from normal post-op and no change was seen in the deviation of the COP line or hindfoot-forefoot angle (p=0.8025) post-op. Kinematically, patients with greater than 5° internal FPA had a higher likelihood of a successful outcome (60% had a less internal FPA, while no feet worsened.) Those that demonstrated a normal FPA pre-op risked a worsening FPA (35% had a more internal FPA while only 12% improved.) There were 16/37 (43%) feet with foot drop in late swing pre-op, 10 of which improved following surgery, however, 5 new foot drops developed post-op.
Table 1
Plantar pressures comparing Pre-Op, Post-Op & Control
 
Forefoot
Midfoot
Forefoot
 
Medial
Lateral
Medial
Lateral
1st Met.
2nd Met.
3-5th Mets.
 
Mean
+ SD
Mean
+ SD
Mean
+ SD
Mean
+ SD
Mean
+ SD
Mean
+ SD
Mean
+ SD
Peak Pressure
<0.0001 ‡*†
<0.0001 ‡*†
0.0001 ‡*
<0.0001 ‡*
<0.0001 ‡*
<0.0001 ‡*
<0.0001 ‡*
Pre
10.2
6.6
10.6
4.8
4.4
2.6
16.2
6.3
4.4
2.6
9.1
3.7
23.8
10.3
Post
17.2
11.4
15.4
7.1
6.5
3.2
10.0
3.3
6.5
3.2
12.4
4.6
16.0
4.0
Control
25.0
8.2
20.8
6.4
7.5
2.0
7.9
1.8
7.5
2.0
14.7
4.9
14.5
4.7
Contact Area %
0.0011 ‡
0.3299
0.0012 ‡
<0.0001 ‡*†
<0.0001 ‡*†
0.5241
<0.0001 ‡*†
Pre
9.1
3.4
13.2
4.8
2.1
2.1
24.8
2.9
2.1
2.1
8.4
2.3
26.6
5.2
Post
10.4
2.3
12.7
2.7
3.8
3.6
20.6
2.6
3.8
3.6
8.4
1.2
22.6
4.8
Control
11.8
1.1
11.7
1.0
5.2
3.4
16.0
2.7
5.2
3.4
8.9
1.5
17.8
2.5
Contact Time %
0.0011 ‡*
0.0408
0.0026 ‡*
<0.0001 ‡†
<0.0001 ‡*
0.0006 *
<0.0001 ‡*†
Pre
38.8
21.9
48.2
18.9
31.6
22.7
80.3
8.0
31.6
22.7
75.7
15.1
94.5
3.5
Post
54.4
17.1
57.2
15.0
47.2
20.9
74.6
9.5
47.2
20.9
86.9
10.7
90.9
5.1
Control
50.7
9.0
49.9
8.5
45.2
9.2
61.8
10.8
45.2
9.2
82.0
6.3
83.9
5.0
Significant change (p< 0.05): ‡Pre/Control; †Post/Control; *Pre/Post

Conclusions

Changes seen in plantar pressures would suggest that during stance, the foot is better aligned, more evenly distributing pressures throughout the foot rather than focused to the lateral midfoot and forefoot regions. Based on gait results, pre-operative foot progression angle may be an indicator for successful outcomes of ATT transfer in patients with residual deformity.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://​creativecommons.​org/​licenses/​by/​2.​0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
share
DELEN

Deel dit onderdeel of sectie (kopieer de link)

  • Optie A:
    Klik op de rechtermuisknop op de link en selecteer de optie “linkadres kopiëren”
  • Optie B:
    Deel de link per e-mail
Literatuur
1.
go back to reference Richards BS, et al: A comparison of two nonoperative methods of idiopathic clubfoot correction: the Ponseti method and the French functional (physiotherapy) method. J Bone Joint Surg Am. 2008, 90: 2313-2321. 10.2106/JBJS.G.01621. CrossRefPubMed Richards BS, et al: A comparison of two nonoperative methods of idiopathic clubfoot correction: the Ponseti method and the French functional (physiotherapy) method. J Bone Joint Surg Am. 2008, 90: 2313-2321. 10.2106/JBJS.G.01621. CrossRefPubMed
2.
go back to reference Jeans KA, Karol LA: Plantar pressures following Ponseti and French physiotherapy methods for clubfoot. J Pediatr Orthop. 2010, 30: 82-89. 10.1097/BPO.0b013e3181c6c4de. CrossRefPubMed Jeans KA, Karol LA: Plantar pressures following Ponseti and French physiotherapy methods for clubfoot. J Pediatr Orthop. 2010, 30: 82-89. 10.1097/BPO.0b013e3181c6c4de. CrossRefPubMed
Metagegevens
Titel
Plantar pressures and ankle kinematics following anterior tibialis tendon transfers in children with clubfoot
Auteurs
Kirsten Tulchin
Kelly A Jeans
Lori A Karol
Lindsey Crawford
Publicatiedatum
01-12-2012
Uitgeverij
BioMed Central
Gepubliceerd in
Journal of Foot and Ankle Research / Uitgave bijlage 1/2012
Elektronisch ISSN: 1757-1146
DOI
https://doi.org/10.1186/1757-1146-5-S1-O32

Andere artikelen bijlage 1/2012

Journal of Foot and Ankle Research 1/2012 Naar de uitgave