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 saidpalatal 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 present invention relates to an apparatus for reconstructing and treating cleft palate. Background technique [0002] Cleft palate (Cleft Palate) is a common congenital developmental malformation of the oral and maxillofacial region. It is a common disease in my country with an incidence rate of 0.182%. Cleft palate not only has soft tissue deformities, but also bone deformities. Cleft palate repair has a long history, and the common feature of these methods is extensive dissection of oral soft tissue, covering complex tissue defects including bone tissue defects through displacement of a mucoperiosteal flap. However, the defect of bone tissue could not be repaired, and a large number of scars were formed due to extensive tissue separation. The shrinkage of the scars resulted in a short soft palate, resulting in insufficiency of velopharyngeal closure and affecting the development of craniomaxillofacial bones. [0003] In recent years, distractio...

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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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