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  • Title: [Tissue response in circum-maxillary sutures after transverse palated suture expansion].
    Author: Liu C, Song R, Song Y.
    Journal: Zhonghua Zheng Xing Shao Shang Wai Ke Za Zhi; 1999 Sep; 15(5):329-31. PubMed ID: 11501090.
    Abstract:
    OBJECTIVE: This study was carried out to investigate the histological reactions of midfacial sutures induced by transverse palatal suture expansion. METHODS: Nine mongrel dogs of 8-week old were used in the study. Six of them were used as experimental group as described in a previous paper. The additional three served as controls. In the experimental dogs, a NiTi-shape memory alloy (NiTi-SMA) arch wire was used to expand the transverse palatal suture. Tetracycline was injected intramuscularly (50 mg/kg) three days before operation and at the time of sacrifice. Tissue reactions of premaxillo-maxillary suture, transverse palatal suture, zygomatico-maxillary suture, zygomatico-temporal suture and fronto-maxillary suture were observed in undecalcified tetracycline labeled sections and decalcified histological sections. RESULTS: The sutures in normal young dogs showed active bone formation. With the increase of age, the cellular components of the suture decreased. A great amount of new bone apposition was found in the bony front of expanded transverse palatal suture of the experimental dogs. Degenerative changes were found in premaxillo-maxillary suture at the expanded side while the contralateral showed active osteogenesis. Other sutures manifested both bone apposition and deposition due to the irregular interdigitations. CONCLUSION: After expansion, a great amount of new bone formed in the transverse palatal suture and thus the hard palate was lengthened. All the circum-maxillary sutures reacted in different patterns.
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