Bioabsorbable implants for subtalar arthroereisis in pediatric flatfoot

In this retrospective study, we aim to assess the safety and feasibility of adapting subtalar arthroereisis (SA) for type I osteogenesis imperfecta (OI) patients with symptomatic flatfoot. From December 2013 to January 2018, six type I OI patients (five girls and one boy, 12 feet) with symptomatic flexible flatfoot were treated with SA and the Vulpius procedure. All the patients were ambulatory and skeletally immature with failed conservative treatment and unsatisfactory life quality. The median age at the time of surgery was 10 years (range 5–11), and the median follow-up period was 55 months (range 33–83). All functional and radiographic parameters improved (p < 0.05) after the procedure at the latest follow-up. The median American Orthopaedic Foot and Ankle Society ankle-hindfoot scale improved from 68 (range 38–80) to 95 (range 71–97). All of the patients ambulated well without significant complications. The weight-bearing radiographs showed maintained correction of the tarsal bone alignment with intact bony surfaces adjacent to implants during the post-operative follow-up period. This is the very first study on symptomatic flatfoot in pediatric patients with type I OI. Our data suggest that SA is a potentially viable approach, as functional improvements and maintained radiographic correction without significant complication were observed.

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Is subtalar arthroereisis a good procedure in adult-acquired flatfoot? A systematic review of the literature

Orthopaedics & Traumatology Surgery & Research ◽

10.1016/j.otsr.2021.103002 ◽

2021 ◽

pp. 103002

Author(s):

Lucas Mattesi ◽

David Ancelin ◽

Mathieu Pierre Severyns

Keyword(s):

Systematic Review ◽

Review Of The Literature ◽

Subtalar Arthroereisis

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Repair of maxillary alveolar cleft defects with two different bioabsorbable implants: an experimental study in growing rabbits

European Journal of Plastic Surgery ◽

10.1007/s002380100229 ◽

2001 ◽

Vol 24 (2) ◽

pp. 66-73 ◽

Cited By ~ 3

Author(s):

K. Puumanen ◽

M. Kellomäki ◽

V. Ritsilä ◽

T. Böhling ◽

H. Pihlajamäki ◽

...

Keyword(s):

Experimental Study ◽

Alveolar Cleft ◽

Bioabsorbable Implants

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Subtalar Arthroereisis Implant Removal in Adults: A Prospective Study of 100 Patients

The Journal of Foot & Ankle Surgery ◽

10.1053/j.jfas.2015.12.005 ◽

2016 ◽

Vol 55 (3) ◽

pp. 500-503 ◽

Cited By ~ 16

Author(s):

Amol Saxena ◽

Alessio Giai Via ◽

Nicola Maffulli ◽

Haywan Chiu

Keyword(s):

Prospective Study ◽

Implant Removal ◽

Subtalar Arthroereisis ◽

A Prospective Study

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Super-hydrophobic stearic acid layer formed on anodized high purified magnesium for improving corrosion resistance of bioabsorbable implants

Journal of Magnesium and Alloys ◽

10.1016/j.jma.2018.08.003 ◽

2018 ◽

Vol 6 (4) ◽

pp. 327-336 ◽

Cited By ~ 15

Author(s):

Sohrab Khalifeh ◽

T. David Burleigh

Keyword(s):

Corrosion Resistance ◽

Stearic Acid ◽

Bioabsorbable Implants

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Flake-Austin Modification of the STA-Peg Arthroereisis

Journal of the American Podiatric Medical Association ◽

10.7547/87507315-91-8-394 ◽

2001 ◽

Vol 91 (8) ◽

pp. 394-405 ◽

Cited By ~ 20

Author(s):

Patricia Forg ◽

Kent Feldman ◽

Edward Flake ◽

Donald R. Green

Keyword(s):

Complication Rate ◽

Time Of Surgery ◽

Subtalar Arthroereisis

The Smith subtalar arthroereisis implant (STA-peg) is used to correct severe collapsing pes valgoplanus in children. Flake and Austin modified the placement of this implant to block the leading wall of the lateral talus. Twenty-one patients with a total of 40 STA-peg procedures were evaluated subjectively and objectively. The average age at the time of surgery was 9.7 years (4 to 16 years). The follow-up period averaged 36 months (12 to 90 months). The subjective, objective, and radiographic results were positive and the complication rate was low. A significant advantage of the Flake-Austin modification of the STA-peg placement in transverse planar dominant foot types is also noted. (J Am Podiatr Med Assoc 91(8): 394-405, 2001)

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Mechanical Analysis and Corrosion Analysis of Zinc Alloys for Bioabsorbable Implants for Osteosynthesis

Materials ◽

10.3390/ma15020421 ◽

2022 ◽

Vol 15 (2) ◽

pp. 421

Author(s):

Salome Hagelstein ◽

Sergej Zankovic ◽

Adalbert Kovacs ◽

Roland Barkhoff ◽

Michael Seidenstuecker

Keyword(s):

Mechanical Properties ◽

Mechanical Strength ◽

Orthopedic Implants ◽

Hydrogen Gas ◽

Pure Zinc ◽

Zinc Alloys ◽

Silver Alloys ◽

Bioabsorbable Implants ◽

Corrosion Rates ◽

Target Values

Zinc alloys have recently been researched intensely for their great properties as bioabsorbable implants for osteosynthesis. Pure zinc (Zn) itself has relatively poor strength, which makes it insufficient for most clinical use. Research has already proven that the mechanical strength of zinc can be enhanced significantly by alloying it with silver. This study evaluated zinc silver alloys (ZnAg) as well as novel zinc silver titanium alloys (ZnAgTi) regarding their mechanical properties for the use as bioabsorbable implants. Compared to pure zinc the mechanical strength was enhanced significantly for all tested zinc alloys. The elastic properties were only enhanced significantly for the zinc silver alloys ZnAg6 and ZnAg9. Regarding target values for orthopedic implants proposed in literature, the best mechanical properties were measured for the ZnAg3Ti1 alloy with an ultimate tensile strength of 262 MPa and an elongation at fracture of 16%. Besides the mechanical properties, the corrosion rates are important for bioabsorbable implants. This study tested the corrosion rates of zinc alloys in PBS solution (phosphate buffered solution) with electrochemical corrosion measurement. Zinc and its alloys showed favorable corrosion rates, especially in comparison to magnesium, which has a much lower degradation rate and no buildup of hydrogen gas pockets during the process. Altogether, this makes zinc alloys highly favorable for use as material for bioabsorbable implants for osteosynthesis.

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