| Popis: |
The normal histomorphology of the frontopremaxillary suture in mice was observed, and sutural function was then examined by the incisor excision method.The suture was of the overlapping type, and was modified by secondarily developed interdigitations constructed of plate-like bony protrusions arranged sagittally at the sutural surfaces of the frontal bone and premaxilla. Well developed collagen fiber bundles, arising from the surface of the bony protrusions of the frontal bone, were oriented oblique to the postero-medial and postero-lateral directions and were inserted into the surface of the bony protrusions of the premaxilla. After incisor excision, the suture showed a decrease in the connecting ability. However, the suture's connecting ability was almost restored following regeneration of the incisors.The bony construction and orientation of the collagen fiber bundles in the frontopremaxillary suture are believed to correspond to the bite force of the incisors and to act as a shock absorber to decrease this force. |
