Contact areas and pressure distributions in the subtalar joint

Wang, Chung-Li; Cheng, Cheng‐Kung; Chen, Chao-Wang; Lu, Chi-Jen; Hang, Yi‐Shiong; Liu, Tang-Kue

doi:10.1016/0021-9290(94)00076-g

Cited by 83 publications

(43 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We presumed the best position for ankle arthrodesis was neutral flexion of the foot in the sagittal plane, neutral to slight valgus (5°) in the coronal plane, and 5°to 10°external rotation in the horizontal plane with the talus centered exactly below the tibia [7,22,32,48]. These recommendations from clinical outcome studies could be substantiated by a wealth of studies employing further measurements like gait analyses and pressure measurements of the subtalar joint [7,15,34,47,52,55]. It is assumed that less favorable outcomes and high rates of subtalar arthritis in historical and long-term studies result from fusion in malalignment [1, 4-7, 11, 17, 32].…”

Section: Discussionmentioning

confidence: 99%

“…All of these studies included a substantial portion of ankles that were fused in either varus/ valgus or equinus. There is consensus in the literature that a neutral position in the sagittal plane and neutral to slight valgus in the coronal plane is essential for a satisfactory functional outcome and puts less strain on adjacent joints including the knee [1,7,32,52]. Conti and Walter observed a correlation of arthritic changes at the midfoot and fusion in plantar flexion [13].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

High Union Rates and Function Scores at Midterm Followup With Ankle Arthrodesis Using a Four Screw Technique

Zwipp

Rammelt

Endres

et al. 2010

Clinical Orthopaedics &Amp; Related Research

127

View full text Add to dashboard Cite

When evaluating the role of ankle arthrodesis in the treatment of severe ankle arthritis, postoperative infection, nonunion, and the development of arthritis at the adjacent joints are major issues when considering treatment alternatives. We evaluated the rate of complications, the functional outcome, and compensatory range of motion at the midtarsal joint at medium-term followup after ankle arthrodesis with four cancellous screws. We performed 94 ankle fusions in 92 patients; 12 patients were lost to followup and eight declined to participate, leaving 72 patients (76%) for evaluation. The minimum followup was 4.8 years (mean, 5.9; range, 4.8-7.8 years). No patient developed a deep infection; three patients developed postoperative hematoma which we operatively drained. Union occurred in 93 of the 94 patients (99%). The sagittal motion at the midtarsal joint averaged 24°. Secondary arthritis of the subtalar and talonavicular joints developed during the followup period in 17% and 11%, respectively.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

High Union Rates and Function Scores at Midterm Followup With Ankle Arthrodesis Using a Four Screw Technique

Zwipp

Rammelt

Endres

et al. 2010

Clinical Orthopaedics &Amp; Related Research

127

View full text Add to dashboard Cite

show abstract

“…Gait analyses and pressure measurements of the subtalar joint show that ankle arthrodesis with the foot in equinus leads to biomechanically inferior results than those done with the foot in neutral position [2,19,22,23]. Based on the compression and tension vectors in the foot the position of the talus directly under the tibia is preferable instead of the often recommended posterior translation of the talus nach durchschnittlich 5,6 Jahren (4,8-7,6 Jahre) nachuntersucht.…”

Section: Introductory Remarksmentioning

confidence: 99%

Die Vier-Schrauben-Arthrodese des oberen Sprunggelenks

Endres

Grass²,

Rammelt³

et al. 2005

Orthop Traumatol

View full text Add to dashboard Cite

Between January 1, 1994 and December 31, 1998 this technique was performed in 50 ankles of 48 patients. 40 patients could be followed up for an average of 5.6 years (4.8-7.6 years). No serious complications. The average compensatory movement of the Chopart joint amounted to 26 degrees . Osteoarthritis of the subtalar joint was seen in 13%, and of the talonavicular joint in 12.5% of patients. Preexisting osteoarthritis of these joints remained in general unchanged. The AOFAS Score was assessed pre- and postoperatively. Preoperatively, 17.5% of patients showed a satisfactory and 82.5% a poor score. Postoperatively, 52.5% had an excellent, 30% a good, 10% a satisfactory, and 7.5% a poor outcome.

show abstract

“…These both potentially lead to comparatively less strain in the astragalar neck of the larger individuals (as suggested by Gebo and Schwartz [28]). The plantar view shows that the anterior (eversion) half of the calcaneal facet appears relatively smaller and re-orientated in the larger (yellow) model whereas the posterior (inversion) half of the facet appears expanded and re-orientated in the big (yellow) model (inversion and eversion facet halves defined as in Wang et al [29]). …”

Section: Application Of Allometric Vector and Projection Techniques Imentioning

confidence: 95%

Allometric shape vector projection: A new method for the identification of allometric shape characters and trajectories applied to the human astragalus (talus)

Parr

Ruto

Soligo

et al. 2011

Journal of Theoretical Biology

View full text Add to dashboard Cite

shape vector projection: A new method for the identification of allometric shape characters and trajectories applied to the human astragalus (talus). Journal of Theoretical Biology, Elsevier, 2011, 272 (1) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe surface morphology of the human astragalus (talus) is difficult to represent accurately using landmarks as it is essentially globular in shape. Advances in laser scanning technology allow fast and accurate capture of bone surface morphology. However, methodologies to utilise these new accurate 3D data have not been fully developed. The present study uses canonical sampling of whole surface morphology attained through laser scanning and for the first time applies the technique to analysis of bone morphology. We introduce a new technique for identifying allometric shape characters in whole bone surface morphology. In a sample of adult human astragalus the new technique is successful in identifying and isolating intra-specific allometric shape characters in a bone which typically lacks landmarks and has, consequently, proved difficult to analyse using traditional 3D morphometric methods.

show abstract

Contact areas and pressure distributions in the subtalar joint

Cited by 83 publications

References 19 publications

High Union Rates and Function Scores at Midterm Followup With Ankle Arthrodesis Using a Four Screw Technique

High Union Rates and Function Scores at Midterm Followup With Ankle Arthrodesis Using a Four Screw Technique

Die Vier-Schrauben-Arthrodese des oberen Sprunggelenks

Allometric shape vector projection: A new method for the identification of allometric shape characters and trajectories applied to the human astragalus (talus)

Contact Info

Product

Resources

About