A Preliminary Study on the Spatiotemporal Changes in Mandibular Movement, Orofacial Function, and Condylar Morphology Following Orthognathic Surgery in Skeletal Class II and III Patients

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2600129536

Enrollment

Unknown

Registered

2026-08-06

Start date

2026-08-08

Completion date

Unknown

Last updated

2026-08-10

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

Conditions

Malocclusion

Interventions

Skeletal Class II Patients:None

Eligibility

Sex/Gender

All

Age

18 Years to 50 Years

Inclusion criteria

Inclusion criteria: 1.Inclusion Criteria for Patients with Skeletal Class II Dentofacial Deformity: Patient with skeletal Class II dentofacial deformity (ANB angle > 5°) who undergoes orthognathic surgery combined with orthodontic treatment, with the surgical procedure being bilateral sagittal split ramus osteotomy (BSSRO), with or without Le Fort I osteotomy; No parafunctional occlusal habits, with normal mouth opening range and pattern, and no limitation of mouth opening; No pain in bilateral temporomandibular joints (TMJs) prior to surgery; Age between 18 and 50 years (18 <= age <=50); Complete dentition before the initiation of treatment; Complete diagnostic data and clinical records available. 2.Inclusion Criteria for Patients with Skeletal Class III Dentofacial Deformity: Patient with skeletal Class III dentofacial deformity (ANB angle < 0°) who undergoes orthognathic surgery combined with orthodontic treatment, with the surgical procedure being bilateral sagittal split ramus osteotomy (BSSRO), with or without Le Fort I osteotomy; No parafunctional occlusal habits, with normal mouth opening range and pattern, and no limitation of mouth opening; No pain in bilateral temporomandibular joints (TMJs) prior to surgery; Age between 18 and 50 years (18 <=age <=50); Complete dentition before the initiation of treatment; Complete diagnostic data and clinical records available.

Exclusion criteria

Exclusion criteria: 1.Patients with syndromic conditions or systemic diseases; 2.Patients with a history of facial trauma, mandibular condylar fracture, or jaw bone defects; 3.Patients with craniofacial morphological abnormalities.

Design outcomes

Secondary

Measure	Time frame
Three-dimensional trajectory tracing of the mandible during border movements;Patient satisfaction parameters;Condylar position and morphological parameters;Myofunctional parameters;cephalometric parameters;	—

Primary

Measure	Time frame
Three-dimensional trajectory tracing of the condylar point during functional movements;	—

Countries

China

Contacts

Public ContactWang Jiayi

Peking University Hospital of Stomatology

1710303105@pku.edu.cn+86 10 82195741

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Aug 25, 2026