Effect of dissection and reconstruction of palatal muscles on histological structure and ultrastructure of soft palate
10.3969/j.issn.1001-3733.2010.02.011
- VernacularTitle:软腭肌解剖与重建对软腭组织结构影响的实验研究
- Author:
Yong LU
;
Bing SHI
;
Qian ZHENG
- Publication Type:Journal Article
- Keywords:
Soft palate;
Palatal muscles;
Dissection;
Reconstruction
- From:
Journal of Practical Stomatology
2010;26(2):185-189
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the effect of dissection and reconstruction on palatal muscles morphology in cats. Methods: Nine cats were randomly divided into three groups according to the extension of muscle dissection: small area group(<1/3 group),medium area group(1/3-2/3 group)and large-scale area group(>2/3 group).Control group was the normal palatal muscle in any normal side of the palate.Palatal muscles of all experimental groups were dissected from the posterior border of the hard palate and were reconstructed later. The morphology features and ultrastructure of palatal muscles were observed respectively by HE staining and transmission electron microcopy 1-3 month after operation. Results: There were no obvious differences in morphologic features and ultrastructure of palatal muscles between experiment and normal control groups when the range of palatal muscle dissection was less than 2/3. At early stage (1 month) after operation in large-scale area group, the arrangement of muscles fiber were in structural disorder with inflammatory cell infiltration and muscle fibril formation. The Z line was not distinct, muscles fiber became narrow and myocomma arrangement was not fully dense under transmission electron microcopy. At later stage (2 or 3 month after operation) in large-scale area group, the arrangement of muscles fiber were comparatively regular, neonatal muscles fibers became gradually mature and the amount of inflammatory cell had obviously decreased. Ultrastructure study showed that myocomma arrangement was more orderliness, and Z line became more distinct. Conclusion: It suggests that the extensive dissection of palatal muscles carried no fibrosis, and injury musculature could be repaired and regenerated.
