Tooth-support-type guide plate device of alveolar crest retractor and production method of tooth-support-type guide plate device

Abstract

The invention relates to a tooth-support-type guide plate device of an alveolar crest retractor and a production method of the tooth-support-type guide plate device. The tooth-support-type guide platedevice comprises a guide plate body, a connection rod and a tooth support part. The inner surface of the guide plate body is matched with the surface of the lower jaw of a patient in gradient. The tooth support part is provided with a cavity matched with the lower dentition of the patient. The guide plate body is connected with the tooth support part through the connection rod. Osteotomy groovesand a fixing hole are formed in the guide plate body. The production method includes the steps: re-constructing a three-dimensional model for the lower jaw and the lower dentition of the patient; pre-bending a retractor model three-dimensionally; designing the tooth support part according to the lower dentition of the lower jaw model; designing the guide plate body according to the surface profileof the lower jaw of the lower jaw model; confirming positions of osteotomy lines and designing the osteotomy grooves; designing the fixing hole according to the position of the retractor model; designing the connection rod to integrally connect the guide plate body with the tooth support part; printing a finished product three-dimensionally. The tooth-support-type guide plate device and the production method thereof have the advantages that position accuracy of the osteotomy lines and the retractor can be improved, the surgical effect is improved, and surgical efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of alveolar crest traction, in particular to a tooth-supported alveolar crest tractor guide plate device and a manufacturing method thereof. Background technique [0002] Patients with alveolar bone and corresponding dentition defects caused by trauma, tumors, ribs, ilium, and fibula transplantation or age-related changes. The defect is large and it is difficult to perform one-stage bone grafting, or the surgical trauma after bone grafting is large and difficult to When closed, the alveolar bone is often distracted vertically with a ridge retractor. The currently commonly used alveolar bone distractor is the 10mm or 15mm alveolar ridge distractor produced by Cibei Company, which is mainly suitable for lateral and vertical traction of the mandibular body. In previous studies, more rely on the operator's experience to place the intraoperative retractor in place. [0003] The existing technology often prints ...

AI Technical Summary

Problems solved by technology

[0003] The existing technology often prints a mandible model with a size of 1:1 with the mandible of the patient, and the retractor is close to the mandible model before bending. However, the following problems often occur during the operation: First, the mandible model is limited due to Due to the thickness of the CT layer and the accuracy of the 3D printing printer, there will be a large error with the patient's mandible, and the retractor will not fit well during the operation; secondly, it is difficult to control the direction of the retractor during the pre-bending process, resulting in the final traction direction There was a large deviation; third, due to the intraoperative visual field and the position of the patient's head, the osteotomy could not be performed according to the scribed position of the model, and the thickness of the new bone drawn out was not guaranteed; fourth, due to the position of the inferior alveolar nerve Variation, the simple pre-bending of the retractor through the mandible model cannot guarantee the protection of the nerves during the operation, and often requires more experience of the surgeon, which artificially prolongs the operation time

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