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Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_11 | Pages 45 - 45
1 Nov 2022
CONGENITAL POSTEROMEDIAL BOWING OF TIBIA: COMPARISON OF EARLY VERSUS LATE LENGHTENINGS
Chaudhary I Sagade B Jagani N Chaudhary M
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Abstract

Congenital posteromedial bowing of tibia (CPMBT) progresses with decreasing deformity and increasing shortening. Lengthening in CPMBT has not been studied extensively. Our series compares duration and complications of lengthening in younger vs older children.

Methods

28 tibial lengthenings (23 patients) by a single surgeon, divided into two equal groups of 14 segments: group-A ≤ 5 years, Group-B > 5 years. Lengthening was done in all with external fixators. We measured preoperative (bo) and postoperative (po) deformities, initial limb length discrepancy (LLD), LLD at maturity (LLDm), % LLD, amount of lengthening (AmtL) and %L, external fixator duration (EFD) and external fixator index (EFI). We graded complications by Lascombes' criteria, results by ASAMI Bone score.

Results

Mean age was 8.8 ± 7.1 years. Follow-up was 7.9 years. Group-A had significantly greater preoperative deformities. LLD was similar in both. Expected LLD at maturity (LLDM) using the multiplier method was greater than previously reported (group-A: 4.4 – 9.5 cm; group-B: 2.5 – 9.7 cm).%L was 24% in group-A and 15.7% in group-B (p=0.002). EFD and EFI were lesser in group-A than group-B. Lascombes' triple contract was fulfilled in 11/14 lengthenings in group-A vs. 3/14 in group-B. ASAMI bone score was good and excellent in both groups.

Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_5 | Pages 46 - 46
1 Apr 2022
CONGENITAL POSTEROMEDIAL BOWING OF TIBIA: EARLY VERSUS LATE LENGTHENING
Sagade B Chaudhary M Jagani N Chaudhary I
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Introduction

Congenital posteromedial bowing of tibia (CPMBT) is characterized by a decreasing deformity and an increasing limb shortening. Our series compares the duration and complications of lengthening in younger vs older children.

Materials and Methods

We studied 28 tibial lengthenings in 23 patients, divided into two equal groups of 14 segments: group-A ≤5 years (preschool) and Group-B >5 years. We measured preoperative (bo) and postoperative (po) sagittal, coronal, and oblique plane deformities, limb length discrepancy (LLD), amount of lengthening (AmtL), percentage lengthening (%L), external fixator duration (EFD) and external fixator index (EFI). Complications were graded by Lascombes’ criteria, results by ASAMI Bone score.