Analysis of curative effect of double class II traction in adult patients with mandibular retrusion

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Interventional

Source

ChiCTR

Registry ID

ChiCTR2300068571

Enrollment

Unknown

Registered

2023-02-23

Start date

2023-02-28

Completion date

Unknown

Last updated

2023-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Oral and maxillofacial deformities

Interventions

double Class II traction:Traction of lower 6 and upper 3, lower 3 and upper 1 at the same time

bilateral Class II traction:Lower 6 and upper traction hook traction

Eligibility

Sex/Gender

All

Age

18 Years to 45 Years

Inclusion criteria

Inclusion criteria: ? Age = 18 years; ? Class II malocclusion, molar distal to apical to completely distal, with mandibular retrusion; ? All were cases of tooth extraction; ? There was no significant wear on the upper and lower cusps; ? No history of orthodontic treatment, trauma, joint trauma; ? No other maxillofacial soft and hard tissue diseases, and the general condition is good.

Exclusion criteria

Exclusion criteria: 1.People suffering from diseases that may affect the effect of orthodontic treatment, including but not limited to congenital heart disease, diabetes, hypertension, etc., and other incapacitated or limited behavioral capacity; 2.After examination by a doctor, it is felt that there are other circumstances that are not suitable for inclusion; 3.Allergy to appliance materials, etc.

Design outcomes

Primary

Measure	Time frame
SNA (The angle formed by the pteramine center, the nasal root point and the upper alveolar seat point);SNB (The angle formed by the center of the butterfly saddle, the nasal root point and the seat point of the upper tooth groove);ANB (The angle formed by the upper slot seat point, the lower slot seat point, and the nose root point);SN-GoGn (Mandibular plane angle);U1-SN (Upper central incisor inclination);L1-MP (Lower central incisor inclination);U1-L1 (Cutting the interdental angle);U1-PP (Maxillary central incisor to palatal plane height);U6-PP (Mandibular central incisor to palatal plane height);L6-MP (Mandibular first molar point to mandibular plane height);ANS-Me/N-Me (Ratio of height below to overall height);U1-NA (Convexity of upper central incisor);L1-NB (Lower central incisor convexity);Ls-E (Distance from the point of the upper lip margin to the E line);OJ (Anterior tooth coverage);OB (Anterior tooth overlap);	—

Measure

Time frame

SNA (The angle formed by the pteramine center, the nasal root point and the upper alveolar seat point);SNB (The angle formed by the center of the butterfly saddle, the nasal root point and the seat point of the upper tooth groove);ANB (The angle formed by the upper slot seat point, the lower slot seat point, and the nose root point);SN-GoGn (Mandibular plane angle);U1-SN (Upper central incisor inclination);L1-MP (Lower central incisor inclination);U1-L1 (Cutting the interdental angle);U1-PP (Maxillary central incisor to palatal plane height);U6-PP (Mandibular central incisor to palatal plane height);L6-MP (Mandibular first molar point to mandibular plane height);ANS-Me/N-Me (Ratio of height below to overall height);U1-NA (Convexity of upper central incisor);L1-NB (Lower central incisor convexity);Ls-E (Distance from the point of the upper lip margin to the E line);OJ (Anterior tooth coverage);OB (Anterior tooth overlap);

—

Countries

China

Contacts

Public ContactTingting Wu

Stomatologic Hospital & College, Anhui Medical University

wutingting_focus@163.com15156683363

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026