Int J Stomatol ›› 2023, Vol. 50 ›› Issue (1): 82-90.doi: 10.7518/gjkq.2023007

• Methods • Previous Articles     Next Articles

Improved application of a novel device that could achieve dental arch mesialization

Zhu Yeling1(),Wang Xi2,Sun Tiantong1,Wang Lina1,He Xiaoming1,Li Jiazhi1()   

  1. 1.Jiazhi Dental Clinic, Shenzhen 518028, China
    2.Dept. of Orthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
  • Received:2022-03-10 Revised:2022-07-10 Online:2023-01-01 Published:2023-01-09
  • Contact: Jiazhi Li;
  • Supported by:
    Shenzhen Futian District Public Health and Public Welfare Research Project(FTWS-2020082)


In clinical practice, few orthodontic methods could be used to achieve simple mesial movement of molars, mesial movement of anterior teeth, anterior movement of whole dentition, or correction of midline of dentition. However, they are complicated or they have many side effects. Combining two cases, this paper introduces a new type of spring pushing device, which could achieve the whole dentition forward, the posterior teeth forward to close the gap, the anterior teeth forward, or the midline correction. The spring pushing device is composed of four components, such as the force control lever, the force pushing spring, the force transfer angle, and the force arm. The biomechanical structure principle and clinical application effect of the device were analyzed and discussed to provide a new treatment method for similar clinical patients.

Key words: novel spring, orthodontic advancement, fixed appliance, skeletal anchorage

CLC Number: 

  • R 783.5


Fig 1

Organization of the novel device"

Fig 2

Preparation for measurement outside the mouth of the device"

Fig 3

Device installation"

Fig 4

Device fixed"

Fig 5

Force transmission of novel device"

Fig 6

Analysis of tooth force and movement mode"

Tab 1

Case 1 analysis and measurement of lateral cranial radiographs"


Fig 7

Anterior facial, jaw images and X-ray film of case 1"

Fig 8

Jaw images during treatment of case 1"

Fig 9

Posterior facial, jaw images and X-ray of case 1"

Fig 10

Jaw images were maintained after 1 year of case 1"

Tab 2

Analysis and measurement of lateral cranial radiographs of case 2"


Fig 11

Anterior facial, jaw images and X-ray film of case 2"

Fig 12

Jaw images during treatment of case 2"

Fig 13

Posterior facial, jaw images and X-ray of case 2"

Fig 14

Jaw images were maintained after 1 year of case 2"

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