Intraoral impression preparation device and assembly for maxillary defect patient

Abstract

The invention relates to the field of medical instruments, and relates to an intraoral impression preparation device and an assembly for a maxillary defect patient. The device main body comprises a tray base and supporting units. A plurality of detachable supporting units are arranged on the tray base, the supporting units support and improve the connection strength between an impression materialand a tray, and the supporting units with different shapes can provide comprehensive strategic support for patients with various jaw defects. The tray base and the supporting units are used for loading the impression material, and the type, the number and the installation position of the supporting units are determined according to the shape of the defect cavity wall of the maxillary defect patient before the impression material is loaded. The assembly is mainly used for magnetic connection, removal and reset of multilayer impression. By adopting a matrix thought, the defect cavity position and the three-dimensional space information are reserved, meanwhile, the recording of the jaw defect cavity is improved from integral replacement to local fine adjustment, a layering mode aiming at complex cases is combined, the technical difficulty of clinical operation is reduced, the injury of the patient is reduced, and the safety of the impression preparation is improved.

Description

technical field [0001] The present application relates to the field of medical devices, in particular to a device and components for making an intraoral impression of a patient with a maxillary bone defect. Background technique [0002] Congenital jaw defects (such as cleft lip and palate) and acquired defects (such as trauma, tumor resection, jaw osteomyelitis, etc.) The patient brings serious physical and psychological obstacles: such as food entering the nasal cavity when chewing, easy to cough, poor chewing ability; slurred pronunciation, heavy nasal sound, unrecognizable; food flows into the nasal cavity or out of the mouth when eating, causing choking and coughing Discomfort; difficulty in sucking in infancy; soft tissue collapse caused by jaw defect, scar contracture and traction lead to inability to close eyelids and lips and facial deformities. [0003] For such patients, the clinical treatment method is to close the oronasal cavity communication defect with an occ...

AI Technical Summary

Problems solved by technology

[0006] 1. The shaping and position determination of the wax mass requires high professional skills, and it is difficult for a professional prosthodontist to achieve success once, and it is easy to cause the wax mass to be too large, too small or not corresponding to the defect cavity. If the wax group cannot provide effective support or is blocked by the edge of the defect cavity and cannot enter the defect cavity, it is often necessary to repeatedly remake the wax group

However, the re-making of the wax ball is often a complete re-making, and the original position information cannot be effectively used. Under the dual variables of changing the shape of the wax ball and the position of the wax ball, the success rate of the attempt is reduced, and it often takes multiple attempts to obtain a suitable position. The blocker upper tray

[0007] 2. The hardness of the wax block is relatively high, and it is easy to re-traumatize the already fragile defect when trying and taking the model, resulting in wound pain and bleeding

[0008] 3. The surface of the wax block is smooth, the bonding force with the material is poor, and the shape of the defect cavity is complex, and there is a larger defect cavity under the defect opening, while the strength of the impression material is poor and the fluidity is high, and the impression material and the material are easy to appear. Separation of the wax mass and impression material flowing into the tissue undercut, tearing the impression material in the undercut and remaining in the nasopharyngeal cavity during removal

[0009] 4. The wax ball and the upper tray are connected by the strength of the liquid wax after solidification. This kind of connection is weak, and the wax block is easy to fall off from the upper tray.

[0010] In addition, for patients with limited opening or excessively large jaw defect, on the basis of the above problems, there is an additional problem that the huge impression cannot be taken out of the mouth after solidification. For such patients, clinicians usually ask them to train the opening first, But this process is more painful; or use impression paste combined with alginate to make layered impressions, but this method requires high skill and experience for doctors, it is difficult to take out the upper layer impressions, and the accuracy of the junction of layered impressions is relatively low. Low

Images