Unilateral coronal synostosis: a histomorphometric study

The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association
H VastardisJ Glowacki

Abstract

This histomorphometric study compared the open and prematurely fused side of the coronal suture in subjects with unilateral coronal synostosis (UCS). Sutures and parasutural bone were obtained from seven subjects with nonsyndromic UCS during operative correction at 3 to 24 months of age. Histological and cellular analyses were performed for the affected and open sutures. Specimens were examined by light and polarizing microscopy. Sutural patterns, osseous morphology, calvarial thickness, tartrate-resistant acid phosphatase (TRAP)-positive cells, and marrow spaces were evaluated histomorphologically, qualitatively, and semiquantitatively. Histomorphometry was performed to determine total projected area of marrow space as a percentage of unit area, total number of TRAP-positive cells per specimen, and perisutural cranial thickness. Polarizing microscopy showed that affected sutures were composed of more lamellar bone than the normal sutures. By light microscopy, the clinically fused sutures were 1.7-fold thicker (p <.02), had twofold larger marrow spaces (p <.0006), and contained sixfold more TRAP-positive osteoclasts in marrow spaces near the suture (p <.04) than the normal sutures. Quantitative analysis of the normal sutures re...Continue Reading

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