Articular Disc Position Before and After BSSRO in Skeleton Class III Patients

The Comparison of Articular Disc Position Before and After Bilateral Sagittal Split Ramus Osteotomy in Skeleton Class III Patients using Magnetic Resonance Imaging

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20220318002

Enrollment

Registered

2022-03-18

Start date

2021-08-08

Completion date

Unknown

Last updated

2026-08-03

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

Conditions

Skeleton Class III Skeleton class III, orthognatic surgery, dentofacial deformities, temporomandibular joint disc, magnetic resonance imaging

Interventions

Patients with skeleton class III deformities who will received orthognatic surgery.

Screening

BSSRO patients

Eligibility

Sex/Gender

All

Age

18 Years to 35 Years

Inclusion criteria

Inclusion criteria: 1. Patient age ranged from 18 to 35 years old. 2. Patients with skeleton class III deformities. 3. Patients who receive orthogenic treatment before and after surgical correction. 4. Patients who will prospectively undergo setback BSSRO with and/or without maxillary surgical correction.

Exclusion criteria

Exclusion criteria: 1. Patients who will receive other surgical techniques to eliminate condylar torque such as posterior bending technique 2. Patients with medical conditions that affect bone healing process such as diabetic mellitus, or currently on bisphosphonate or steroid therapy 3. Patients who are currently smoking 4. Patients with history of condyle fracture and/or trauma 5. Patients who have a history of TMDs diagnosis or treatment before being included in the study 6. Patients who have complications of BSSRO such as condylar displacement, immediate postoperative occlusal instability, unfavorable bony split, infection, loosening miniplates and screws, present of foreign bodies, sequestrum formation, mal-/non-union bone segment will be subsequently excluded from the study 7. Patients who have any contraindication for MRI examination such as i. Claustrophobia ii. Patients with metal implants or metal devices such as metal joint implant, metal plate with ferromagnetic substances, metal cardiac valve, pacemaker, blood vessel clip, metal stent, cochlear implant iii. Patients with metallic foreign body iv. Pregnancy patients

Design outcomes

Primary

Measure	Time frame
Articular disc position Before surgery, 3 months after surgery, 6 months after surgery Disc position angle	—

Secondary

Measure	Time frame
Disc-condyle relationship Before surgery, 3 months after surgery, 6 months after surgery Evaluate the sagittal view of MR images and classify the disc-condyle relationship	—

Countries

Thailand

Contacts

Public ContactNathakarn Thamwatharsaree

Chiang Mai University

Nathakarn_tham@cmu.ac.th053944455

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026