Traction device used in oral cavity for treating cleft palate made of nickel-titanium memory alloy

Abstract

A NiTi memory alloy type internal palatoschisis tractor is composed of a palatal steel supporter whose surface is matched with the palatal mucosa, a fixing belt ring fixed to the external side of said palatal steel supporter and surrounding on molar teeth, and a curved NiTi memory alloy bar fixed between said palatal steel supporter and palatal bone.

Description

technical field [0001] The invention relates to an instrument for the restoration and treatment of cleft palate. Background technique [0002] Cleft palate (Cleft Palate) is a common congenital malformation of oral and maxillofacial development. It is a common disease in my country, with an incidence rate of 0.182%. Cleft palate not only has soft tissue deformities, but more importantly, bone tissue deformities. Cleft palate repair has a long history, and the common feature of these methods is extensive separation of oral soft tissues, and the displacement of mucoperiosteal flaps to cover complex tissue defects including bone tissue defects. However, the defect of bone tissue cannot be repaired, and, due to extensive tissue separation, a large number of scars are formed, and the shrinkage of the scars causes the soft palate to be short, which in turn causes velopharyngeal insufficiency and affects the development of craniomaxillofacial bones. [0003] In recent years, as a...

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Problems solved by technology

For example, Chinese patent 012068306: ①This retractor has a complex structure, retains the upper maxillary posterior teeth, is in a horizontal state, occupies the space of the palatal vault, and depresses the tongue body, which seriously affects the pronunciation and eating of patients with cleft palate, and oral hygiene is also difficult to maintain; ② During the stretching process, the bone segment moves horizontally, which is inconsistent with the anatomical shape of the palate. Stretching will result in a flat arch of the palate, a downward movement of the nasal cavity floor, changes in the attachment position of the palate muscles and the shape of the nasal airway, which will affect the function;③ It needs to be added twice a day, and the operation is cumbersome, especially not suitable for 2.5-3-year-old children of the appropriate age for surgery; etc.

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