A digital manufacturing method of cleft lip and palate alveolar plastic palate guard

Abstract

The invention provides a digital production method of a cleft lip and palate alveolar shaping palate guard plate. A 3D scanner is used for directly scanning the oral cavity of a patient or an oral cavity model, and a digital model of the alveolar bone morphology in the oral cavity of the patient is obtained; jawbone mark points are calibrated; according to a jawbone moving rule before and after treatment, preoperative coordinates, postoperative coordinates and coordinate difference values of the jawbone mark points are marked, the coordinate difference value of each mark point is decomposed, an alveolar bone status in each step is obtained, the palate guard plate is virtually added, and the palate guard plate comprises a base plate and a connecting rod arranged in the lateral direction ofthe base plate; the palate guard plate and a corresponding adjusting model in each step are derived; the palate guard plate and the corresponding adjusting model are assembled and merged into a wholemodel; by adjusting thickness data of the palate guard plate, the palate guard plate is substantialized, the data is input into a 3D printer for printing, and a real palate guard plate object in eachstep is obtained. The digital production method of the cleft lip and palate alveolar shaping palate guard plate can avoid the interaction force between devices, and individually designs the cleft lipand palate alveolar shaping palate guard plate.

Description

technical field [0001] The invention belongs to the technical field of PNAM orthotics in medical instruments, and in particular relates to a digital manufacturing method of a cleft lip and palate alveolar shaping palate guard. Background technique [0002] Clefts of the lip and / or palate (CLP) is a common birth defect. Children with cleft lip and palate are often accompanied by severe asymmetric deformities of nasolabial tissue and jaw. The current treatment of cleft lip and palate is a sequential treatment of multidisciplinary cooperation, among which preoperative orthopedic treatment is the first step. Pre-surgical Nasoalveolar Molding (Pre-surgical Nasoalveolar Molding, PNAM) was first proposed by Grayson, and it is a widely accepted orthopedic method for children with CLP before cleft lip repair surgery. The PNAM corrector includes a palate guard and a nasal brace extending from the palate guard to the nose. It can make irregular dental arches regular, reduce soft tissu...

AI Technical Summary

Problems solved by technology

Frequent follow-up visits increase the economic and time expenditure of patient families in remote areas

In addition, the traditional PNAM treatment is an empirical treatment, and the treatment effect is positively related to the doctor's clinical experience. Most of the orthotics are manually made and modified by doctors and technicians. The treatment is random and the manufacturing accuracy is unstable. And the effect is difficult to predict. The workmanship of the orthotic is relatively rough, and the selected self-condensing material is highly irritating, which often causes damage to the soft and hard tissues of the maxillofacial area of ​​the child, and even the child refuses to wear it, resulting in the failure of the treatment.

[0004] In addition, the one-piece structure of traditional PNAM orthotics has certain defects

For example, the upward force acting on the tip of the nose will transmit a reverse force through the nose brace at the same time. The reverse force is opposite to the retaining force of the palate guard and dislocates the palate guard downward, which is not conducive to the plasticity of the nose. shape, and there is a risk of the palatal guard shifting and obstructing the airway

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