Neumann H, Schulz AP, Gille J, Klinger M, Jürgens C, Reimers N, Kienast B. Refixation of osteochondral fractures by ultrasound-activated, resorbable pins: An ovine in vivo study.
Bone Joint Res 2013;
2:26-32. [PMID:
23610699 PMCID:
PMC3626216 DOI:
10.1302/2046-3758.22.2000099]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 12/17/2012] [Indexed: 11/22/2022] Open
Abstract
Objectives
Osteochondral injuries, if not treated adequately, often lead
to severe osteoarthritis. Possible treatment options include refixation
of the fragment or replacement therapies such as Pridie drilling,
microfracture or osteochondral grafts, all of which have certain
disadvantages. Only refixation of the fragment can produce a smooth
and resilient joint surface. The aim of this study was the evaluation
of an ultrasound-activated bioresorbable pin for the refixation of
osteochondral fragments under physiological conditions.
Methods
In 16 Merino sheep, specific osteochondral fragments of the medial
femoral condyle were produced and refixed with one of conventional
bioresorbable pins, titanium screws or ultrasound-activated pins.
Macro- and microscopic scoring was undertaken after three months.
Results
The healing ratio with ultrasound-activated pins was higher than
with conventional pins. No negative heat effect on cartilage has
been shown.
Conclusion
As the material is bioresorbable, no further surgery is required
to remove the implant. MRI imaging is not compromised, as it is
with implanted screws. The use of bioresorbable pins using ultrasound
is a promising technology for the refixation of osteochondral fractures.
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