An interventional study of Surgery First and Surgery Early in Orthodontics and Orthognathic Surgical Procedures, sponsored by Gokhan Coban. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-03-09.
Sponsored by Gokhan Coban · Not applicable, Interventional, and Treatment
The aim of this study is to evaluate the three-dimensional tomographic and photographic evaluation of the provision of two different orthognathic surgeries on hard and soft tissues with informative Class III deformity due to maxillary retrognathia and mandibular prognathia.
Patients who will undergo non-extraction surgery will be randomized as 'Pre-Surgery' (SEC) and 'Early Surgery' (EC). Maxillary advancement and mandibular recession will be calculated and a total of 24 patients, 12 in each group, will be included in the study. Millimetric (length, dehiscence, fenestration) and volumetric measurements and soft tissue anthropometric points will be measured in three-dimensional recordings taken at the beginning of treatment (T0) and after debonding (T1). Cone beam computed tomography (CBCT) images will be transferred to NNT and 'Mimics 18.0' programs for measurements. Three-dimensional photographs will be evaluated in the 3dMDvultus program. Shapiro-Wilk test will be used for normality, 'two independent samples t-test' and 'Mann Whitney U test' will be used for intra-group and inter-group comparisons.
This is the only study on the registry with Gokhan Coban as lead sponsor.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Patients in this group started with surgical treatment directly without receiving orthodontic treatment and started orthodontic treatment after surgery.
Procedure: Surgery First
Patients in this group were referred to orthognathic surgery after receiving orthodontic treatment for an average of 6-8 months, and their orthodontic treatments continued after surgery.
Procedure: Surgery Early
One month after surgery, patients were called for an appointment and lower and upper brackets were placed. Treatment was completed when right-left Class I canine and molar relationships and ideal overjet and overbite relationships were achieved.
The patients were directed to surgery with the upper and lower bonds applied at their first appointment and the brackets in their mouths. After surgery, treatment continued until the right-left Class I canine and molar relationship and the ideal overjet and overbite relationship were achieved.
Tooth length measurement (mm)
Root length of maxillary incisors will be measured using cone-beam computed tomography (CBCT). Data will be reported as mean change (± SD).
Time frame: up to 15 months
Tooth volume measurement (mm^3)
Root volume of maxillary incisors will be measured using cone-beam computed tomography (CBCT). Data will be reported as mean change (± SD).
Time frame: up to 15 months
Soft tissue measurement (3D)
Three-dimensional stereophotogrammetry will be used to assess changes in facial soft tissue profile, including convexity and lip-chin relationships. Results will be summarized as mean changes (± SD).
Time frame: up to 15 months
Plan to share: No
This study is completed, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.
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