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Featured researches published by D. Yao.


Orthopade | 2017

Funktionelle Elektrostimulation zur Therapie des neurogenen Fallfußes

D. Yao; E. Jakubowitz; Sarah Ettinger; Leif Claassen; C. Plaass; Christina Stukenborg-Colsman; K. Daniilidis

INTRODUCTION Neurologic paralysis of the foot due to damage to the central nervous system is primarily caused by a cerebral insult. The ankle-foot orthosis (AFO), which is the classical conservative treatment option, is associated with drawbacks, e.g., increased contractures, limited mobilization from the sitting position, and cosmetic aspects. METHODS Functional external electrostimulation (FES) is an suitable treatment method for patients with a central lesion and intact peroneal nerve. Based on this method, the neuroprosthesis is a dynamic therapy option in the form of an implantable nerve stimulator (ActiGait® system, Otto Bock, Duderstadt, Germany) which is placed directly on the motor branch of the peroneus nerve and results in active foot lifting. The aim of the present study is to evaluate the clinical effect of the ActiGait® system with regard to its suitability for everyday use by means of gait tests with an emphasis on time-distance parameters and to compare it with the current literature. RESULTS AND CONCLUSION In this retrospective study, the clinical results after implantation of the ActiGait® system are presented and evaluated. In summary, the implantation of a neuroprosthesis in patients with stroke-related drop foot represents a sensible and promising therapy option.


Unfallchirurg | 2017

Ruptur der Musculus-tibialis-anterior-SehneRupture of the tendon of the tibialis anterior muscle

H. Waizy; B. Bouillon; Christina Stukenborg-Colsman; D. Yao; Sarah Ettinger; Leif Claassen; C. Plaass; K. Danniilidis; D. Arbab

Ruptures of the tendon of the tibialis anterior muscle tend to occur in the context of degenerative impairments. This mainly affects the distal avascular portion of the tendon. Owing to the good compensation through the extensor hallucis longus and extensor digitorum muscles, diagnosis is often delayed. In addition to the clinical examination, magnetic resonance inaging (MRI) diagnostics are of particular importance, although damage or rupture of the tendon can also be demonstrated sonographically. Therapeutic measures include conservative or operative measures, depending on the clinical symptoms. Conservative stabilization of the ankle can be achieved by avoiding plantar flexion using a peroneal orthosis or an ankle-foot orthosis. Subsequent problems, such as metatarsalgia or overloading of the medial foot edge can be addressed by insoles or a corresponding shoe adjustment. An operative procedure is indicated when there is corresponding suffering due to pressure and functional impairment. The direct end-to-end reconstruction of the tendon is only rarely possible in cases of delayed diagnosis due to the degenerative situation and the retraction of the tendon stumps. Depending on the defect size and the tendon quality, various operative techniques, such as rotationplasty, free transplants or tendon transfer can be used.


Unfallchirurg | 2017

Ruptur der Musculus-tibialis-anterior-Sehne

Hazibullah Waizy; B. Bouillon; Christina Stukenborg-Colsman; D. Yao; Sarah Ettinger; Leif Claassen; C. Plaass; K. Danniilidis; D. Arbab

Ruptures of the tendon of the tibialis anterior muscle tend to occur in the context of degenerative impairments. This mainly affects the distal avascular portion of the tendon. Owing to the good compensation through the extensor hallucis longus and extensor digitorum muscles, diagnosis is often delayed. In addition to the clinical examination, magnetic resonance inaging (MRI) diagnostics are of particular importance, although damage or rupture of the tendon can also be demonstrated sonographically. Therapeutic measures include conservative or operative measures, depending on the clinical symptoms. Conservative stabilization of the ankle can be achieved by avoiding plantar flexion using a peroneal orthosis or an ankle-foot orthosis. Subsequent problems, such as metatarsalgia or overloading of the medial foot edge can be addressed by insoles or a corresponding shoe adjustment. An operative procedure is indicated when there is corresponding suffering due to pressure and functional impairment. The direct end-to-end reconstruction of the tendon is only rarely possible in cases of delayed diagnosis due to the degenerative situation and the retraction of the tendon stumps. Depending on the defect size and the tendon quality, various operative techniques, such as rotationplasty, free transplants or tendon transfer can be used.


Orthopade | 2017

Distale Korrekturosteotomie zur Behandlung des Hallux valgus (Chevron-Osteotomie) Distal osteotomy for the treatment of hallux valgus (Chevron osteotomy)

Christina Stukenborg-Colsman; L. Claaßen; Sarah Ettinger; D. Yao; M. Lerch; Christian Plaaß


Zeitschrift Fur Orthopadie Und Unfallchirurgie | 2017

Behandlungsoptionen beim neurogenen Lähmungsfuß – eine systematische Literaturrecherche

Eike Jakubowitz; D. Yao; H. Windhagen; Christina Stukenborg-Colsman; Anna Thomann; Kiriakos Daniilidis


Operative Orthopadie Und Traumatologie | 2017

Behandlung des Fallfußes durch Implantation einer Neuroprothese (ActiGait

D. Yao; E. Jakubowitz; Sarah Ettinger; C. Plaass; Christina Stukenborg-Colsman; K. Daniilidis


Fuß & Sprunggelenk | 2017

Komplikationen nach TMT-I-Arthrodese zur Behandlung von Hallux valgus Deformitäten

Sarah Ettinger; Christina Stukenborg-Colsman; D. Yao; Leif Claassen; Peter Savov; C. Plaass


Foot and Ankle Surgery | 2017

Outcomes after lengthening calcaneal osteotomy for flatfoot deformity: Evans versus Hintermann

Sarah Ettinger; T. Mattinger; D. Yao; C. Stukenborg; Leif Claassen; K. Daniilidis; C. Plaass


Foot and Ankle Surgery | 2017

Evaluation of anatomical structures after calcaneal Evans- or Hintermann osteotomy

Sarah Ettinger; D. Yao; Leif Claassen; C. Stukenborg; K. Daniilidis; C. Plaass


Fuß & Sprunggelenk | 2016

Die isolierte Arthrodese des Talo-Navicular Gelenkes bei Fehlstellungen – Effekte, Möglichkeiten und Grenzen

Christian Plaaß; Sarah Ettinger; D. Yao; Matthias Lerch; Kariem Sibai; Kiriakos Daniilidis; Leif Claassen; Christina Stukenborg-Colsman

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