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Abstract
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<h5 class="section-title" id="d7452294e132">Aims</h5>
<p id="d7452294e134">We detail a modified single incision approach to perform the
Tonnis triple pelvic
osteotomy by a minimally invasive approach.
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<h5 class="section-title" id="d7452294e137">Patients and Methods</h5>
<p id="d7452294e139">12 children underwent minimally invasive Tonnis Osteotomy. There
were five boys and
seven girls in this study group. Average age was 11 years (9–15 years) at the time
of surgery. Mean follow-up was 20.5 months (13–39 months).
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<h5 class="section-title" id="d7452294e142">Results</h5>
<p id="d7452294e144">The average preoperative Antero-Posterior (AP) Centre Edge (CE)
angle was -8.8° (-38.6°–18°),
the average post-operative AP CE angle was 29.7° (25.1°–43.7°). The average preoperative
lateral CE angle was -4.7° (-16°–0°), the average postoperative Lateral CE angle was
28.5° (21.3°–37.4°). The Sharp’s angle before and after surgery were 55.7° (51.3°–66°)
and 32.4° (16.1°–40.1°) respectively. The mean Tönnis angle before and after the osteotomy
were 28.86° (19.7°–43.4°) and 6.3° (0.5°–9.4°) respectively. There was one major complication
with sciatic nerve palsy which is in the recovery phase on followup and six minor
complications including two cases of transient lateral femoral cutaneous nerve injury,
two cases of ischial non-union, over granulation of the wound in one case, and metalwork
irritation in one case.
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<h5 class="section-title" id="d7452294e147">Conclusion</h5>
<p id="d7452294e149">We have described a minimally invasive Tonnis osteotomy as a
viable option based on
our results. This technique is recommended for those who are conversant with the traditional
pelvicosteotomies.
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