Calcaneal Neck Lengthening Osteotomy With Artificial Bone Graft

Status Active, not recruiting

Clinical Trial Summary

In this foot deformity (plano valgus) surgery may be indicated. The deformity is corrected with an osteotomy at the heelbone. In most cases bone graft material has to be obtained from the iliac crest to support the osteotomy. In the planned study a group of children will be operated with an artificial bone graft material and thus avoiding the need harvesting of bone graft at the iliac crest.

Clinical Trial Description

Planovalgus or flatfoot deformity is observed in children with different neuromuscular disorders and is associated with pain and gait disorders due to non-reducible talonavicular joint subluxation. Surgical treatment is aimed at correcting foot malalignement and achieving sufficient plantar flexion in the ankle joint. With a calcaneal lengthening osteotomy procedure the planovalgus deformity can be corrected but it requires the use of graft material to be inserted as a bone wedge at the osteotomy site. In this way the talonavicular joint is indirectly reduced. Obtaining autograft material from the iliac crest in growing children carries a risk of growth arrest and iliac wing deformity which has led to widespread use of allograft bone when performing the operation.

New materials are being developed as substitutes for bone graft material with biphasic calcium phosphate ceramic (BCP) being the most commonly used. BCP is a mixture of porous hydroxyapatite (HA) and β-tricalcium phosphate (β -TCP). Calcium phosphate ceramics have excellent biocompatibility and are thought to be able to facilitate and guide new bone growth. This has been demonstrated in experimental studies. In retrospective clinical studies on patients having filled large bone defects with hydroxyapatite graft material radiological healing is seen at follow ups after average 7.9 years. It has also previously been demonstrated that BCP can be used as artificial bone graft in osteotomies with a good result and complete healing of the osteotomi. ;

Study Design

Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Flatfoot

Clinical Trial Details

NCT number	NCT01645267
Study type	Interventional
Source	Aarhus University Hospital
Contact
Status	Active, not recruiting
Phase	N/A
Start date	October 2010
Completion date	October 2013

View Details

See also
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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.