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Evaluation of mandibular function following bilateral sagittal split osteotomy (BSSO)

Evaluation of mandibular function following bilateral sagittal split osteotomy (BSSO)

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
DRKS
Registry ID
DRKS00039554
Enrollment
40
Registered
2026-04-02
Start date
2026-01-22
Completion date
Unknown
Last updated
2026-04-27

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

Conditions

K07.1

Interventions

Group 1: This monocentric observational study investigates (1) the range of mandibular motion as well as (2) quality of life and subjective self-evaluation in patients with skeletal dysgnathia, both

Sponsors

Universitätsklinikum Jena
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: Eligible for inclusion are patients capable of providing informed consent who present with skeletal dysgnathia and are scheduled to undergo a mandibular osteotomy as part of orthognathic surgery.

Exclusion criteria

Exclusion criteria: Exclusion criteria are an acute trauma in the jaw region, a history of temporomandibular joint trauma, or previous orthognathic surgery involving the mandible.

Design outcomes

Primary

MeasureTime frame
The primary outcome of this study is the change in active maximal mouth opening from the preoperative baseline (t0) to 9–12 months postoperatively (t2).

Secondary

MeasureTime frame
Secondary outcomes include changes in laterotrusion, protrusion and retrusion, as well as the correlation of these objective movement parameters with the results of the Orthognathic Quality of Life Questionnaire (OQLQ) and an additional general questionnaire assessing subjective outcomes.

Countries

Germany

Contacts

Public ContactMartin Fischer

Universitätsklinikum Jena

Martin.Stephan@med.uni-jena.de03641-9-323666

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: May 1, 2026