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Three-dimensional evaluation of postoperative stability: a comparative study between surgery-first and surgery-late
A Valls-Ontañón1, S Triginer-Roig2, I Trujillo2
1Institute of Maxillofacial Surgery, Teknon Medical Center Barcelona, Barcelona, Spain; Department of Oral and Maxillofacial Surgery, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona, Spain.
The surgery-first and surgery-late orthodontic surgery approaches show similar three-dimensional stability after one year. Relapse in the SNA angle was more pronounced in the surgery-late group, particularly for Class III patients.
Area of Science:
- Orthodontic surgery
- Maxillofacial reconstruction
- Dental imaging
Background:
- Comparing surgical timing in orthognathic surgery is crucial for long-term outcomes.
- Standardized center protocols are essential for reliable comparative studies.
Purpose of the Study:
- To compare the three-dimensional stability of the surgery-first versus surgery-late protocols.
- To evaluate stability using cone beam computed tomography (CBCT) at 1-year follow-up.
Main Methods:
- Retrospective study with 56 patients, divided into surgery-first and surgery-late groups.
- Three-dimensional stability assessed via CBCT superimposition at pre-operative, post-operative, and end-of-treatment stages.
- Analysis included linear and angular measurements over a 1-year follow-up period.
Main Results:
- Both groups showed initial post-surgical changes that stabilized by treatment end, with no significant inter-group differences.
- A SNA angle relapse occurred in both groups at 1-year follow-up.
- This relapse was significantly greater in the surgery-late group and specifically noted in Class III patients.
Conclusions:
- The surgery-first and surgery-late protocols demonstrate comparable three-dimensional stability after one year when adherence to eligibility criteria is maintained.
- Surgical timing does not significantly impact overall skeletal stability at one year, though specific relapse patterns may differ.
