A Formula to Predict the Magnitude of Achilles Tendon Lengthening Required to Correct Equinus Deformity

Özyalvaç, Osman Nuri; Akpınar, Evren; Gur, Volkan; Beng, Kubilay; Yağmurlu, Mehmet Fırat; Bayhan, Avni İlhan

doi:10.1159/000501603

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…In surgical practice, EOD might assist the clinician, for example, in tendon lengthening or to measure tremor reduction by means of deep brain stimulation in Parkinson's disease (Shapiro et al, 2007 ; Kwon et al, 2014 ; Özyalvaç et al, 2019 ). Moreover, EOD could be an interesting post-treatment tool to objectify the success or failure of the latter (Bleyenheuft et al, 2008 ).…”

Section: Perspectivesmentioning

confidence: 99%

Effect of Age and Body Size on the Wrist's Viscoelasticity in Healthy Participants From 3 to 90 Years Old and Reliability Assessment

Nguyen

Herman

Mahaudens

et al. 2020

Front. Sports Act. Living

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Excessive or insufficient levels of passive musculoarticular stiffness (PMAS) can lead to joint impairment or instability. Quantifying the PMAS may provide a better understanding of neurological or musculoskeletal disorders. The aims of the present study were multiple: first, to assess the reliability of quantifying PMAS and to collect normative data on the wrist in healthy participants, and second, to assess the effect of age and body size on PMAS. For this purpose, a total of 458 participants from 3 to 90 years old were analyzed with an electromechanical oscillation device (EOD). Passive sinusoidal movements were induced in a flexion/extension pattern in the participants' wrists, enabling an objective measurement of elastic stiffness (EL) and viscous stiffness (VI). Both the dominant and non-dominant wrists were assessed. Two-way repeated-measures ANOVA revealed a sex differentiation from puberty (12-18 years old) and an increase of EL and VI from childhood to adulthood and a decrease of stiffness at old age. EL and VI values were associated with body size characteristics and age. After body size normalization, EL was no longer influenced by the variables measured. On the other hand, VI remained moderately influenced by age and body size. The current study was able to provide normative data of PMAS in the wrist of healthy participants.

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Section: Perspectivesmentioning

confidence: 99%

Effect of Age and Body Size on the Wrist's Viscoelasticity in Healthy Participants From 3 to 90 Years Old and Reliability Assessment

Nguyen

Herman

Mahaudens

et al. 2020

Front. Sports Act. Living

View full text Add to dashboard Cite

show abstract

“…Thus, the risk of over- or under-correction is not negligible ( Borton et al, 2001 ; Dietz et al, 2006 ; Firth et al, 2013 ). A few preoperative methods exist to quantify the needed amount of lengthening ( Pilloni et al, 2019 ; Ozyalvac et al, 2020 ). Yet, these indirect methods are limited in terms of estimating the outcome.…”

Section: Introductionmentioning

confidence: 99%

Quantifying the effects of achilles tendon lengthening surgery: An intraoperative approach

Brendecke

Tsitlakidis²,

Götze³

et al. 2023

Front. Physiol.

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Achilles tendon lengthening (ATL) is frequently used in the treatment of foot deformities. However, there is currently no objective method to determine the optimal muscle length during surgery. We developed an intraoperative approach to evaluate the passive and active forces of the triceps surae muscle group before and after ATL and aimed to test the following hypotheses: 1) the ankle passive range of motion (ROM) increases, 2) passive muscle forces decrease post-ATL, and 3) forces measured from patients with non-neurological and neurological conditions demonstrate different characteristics. Passive forces at various ankle joint positions were measured in ten patients (11.3 ± 3.0 years old) pre- and post-ATL using a force transducer attached to the Achilles tendon. In six patients, active isometric forces were measured by stimulating the triceps surae supramaximally. Passive forces decreased by 94.3% (p < 0.0001), and ROM increased by 89.4% (p < 0.0001) post-ATL. The pre-ATL passive forces were 70.8% ± 15.1% lower in patients with idiopathic foot deformities than in patients with neurological conditions (p < 0.001). The peak active force of 209.8 ± 114.3 N was achieved at an ankle angle of 38.3° ± 16.0°, where the passive force was 6.3 ± 6.7 N. The inter-individual variability was substantial in both groups. In conclusion, the hypotheses posed were supported. The present findings suggest that muscle passive and active force production as well as the inter-individual variability should be considered when planning further treatment.

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Overlapping repair and epitenon healing are more stable biomechanically than side to side repair and endotenon healing in achilles tendon lengthening with Z plasty

Akbulut¹,

Alpay²,

Kirat³

et al. 2022

Foot and Ankle Surgery

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A Formula to Predict the Magnitude of Achilles Tendon Lengthening Required to Correct Equinus Deformity

Cited by 4 publications

References 9 publications

Effect of Age and Body Size on the Wrist's Viscoelasticity in Healthy Participants From 3 to 90 Years Old and Reliability Assessment

Effect of Age and Body Size on the Wrist's Viscoelasticity in Healthy Participants From 3 to 90 Years Old and Reliability Assessment

Quantifying the effects of achilles tendon lengthening surgery: An intraoperative approach

Overlapping repair and epitenon healing are more stable biomechanically than side to side repair and endotenon healing in achilles tendon lengthening with Z plasty

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