Method for preparing tympanic membrane model and tympanic membrane engraving model

Abstract

The invention relates to a method for preparing a tympanic membrane model and a tympanic membrane engraving model. The method includes the following steps that: (1) an ossicle three-dimensional modelis established; (2) the three-dimensional model of an ear canal is established; (3) the boundary of a position where a tympanic membrane is located is delineated; (4) a tympanic membrane form is obtained; (5) a tympanic membrane engraving reference mold is obtained; and (6) 3D printing molding is performed. According to the method of the invention, based on a 3D printing technology, the three-dimensional solid model and tympanic membrane engraving reference model of a personalized reconstructed tympanic membrane can be accurately fabricated, and can accurately reflect the three-dimensional shape and size of the tympanic membrane of a patient, and enables multi-angle observation. With the method adopted, the embedding position of a manubrium mallei on a graft can be determined. The method can be applied to an in-ear under-microscope antilobium cartilage-perichondrium repair tympanic membrane large perforation surgery, can provide a meaningful reference template for the customization ofan antilobium cartilage-perichondrium graft, effectively realize an ear endoscopic surgery and provide accurate models for intraoperative graft design.

Description

technical field [0001] The invention relates to a method for preparing an eardrum model and an eardrum carving model. Background technique [0002] Patients with chronic suppurative otitis media with large perforation of the tympanic membrane currently undergo endoscopic tragus cartilage-perichondrium repair surgery, but the surgery has certain limitations. For example, the lens is prone to fogging in the external auditory canal and needs to be cleaned repeatedly; In a certain space, the external auditory canal is narrow and the surgical field is small, the operation is difficult and time-consuming, especially after the tragus cartilage-perichondrium graft is removed during the operation, it needs to be carved into a suitable shape and size. In the past, the surgeon had to visually observe the shape of the patient's tympanic membrane under a microscope and size, and then sculpt the tragus cartilage in vitro according to the imagination and memory. Carving the tragus cartilag...

AI Technical Summary

Problems solved by technology

[0002] Patients with chronic suppurative otitis media with large perforation of the tympanic membrane currently undergo endoscopic tragus cartilage-perichondrium repair surgery, but the surgery has certain limitations. For example, the lens is prone to fogging in the external auditory canal and needs to be cleaned repeatedly; In a certain space, the external auditory canal is narrow and the surgical field is small, the operation is difficult and time-consuming, especially after the tragus cartilage-perichondrium graft is removed during the operation, it needs to be carved into a suitable shape and size. In the past, the surgeon had to visually observe the shape of the patient's tympanic membrane under a microscope and size, and then sculpt the tragus cartilage in vitro according to the imagination and memory. Carving the tragus cartilage lacks precise data guidance, and usually requires repeated implantation into the surgical cavity and multiple cuts to obtain a suitable graft. This operation is very cumbersome. It is time-consuming and prone to complications. If the graft is trimmed too much, it may lead to the failure of surgical implantation.

If a tympanic membrane model and a tympanic membrane engraving reference mold that basically conform to the shape and size of the patient's tympanic membrane can be constructed, as a reference for graft carving, the above problems can be completely avoided, but there is no relevant report in the existing literature on how to construct a tympanic membrane that is consistent with the shape and size of the patient's tympanic membrane. Basic tympanic membrane models and tympanic membrane engraving reference molds

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