An observational study in Dentofacial Deformities, Malocclusions and Orthognathic Surgery, sponsored by Kırıkkale University. Recruiting at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 40 Years. Per ClinicalTrials.gov, last updated 2026-07-16.
Sponsored by Kırıkkale University · Observational
This study aims to evaluate changes in depressive symptoms and subjective esthetic perception before and after bimaxillary orthognathic surgery in patients with different types of malocclusion. The study will analyze anonymized clinical data and questionnaire responses to assess the impact of orthognathic surgery on psychological well-being and esthetic perception.
This prospective observational study aims to investigate changes in depressive symptoms and subjective esthetic perception in patients with different types of malocclusion undergoing bimaxillary orthognathic surgery. Participants will be evaluated before surgery and during the postoperative follow-up using validated assessment questionnaires.
The study will analyze anonymized data obtained from routine clinical records and patient-reported questionnaires. Variables to be collected include age, sex, occupation, educational level, social media use, and patients' subjective perceptions of esthetics and depressive symptoms. The findings will contribute to a better understanding of the psychological and esthetic outcomes associated with orthognathic surgery and may help optimize patient evaluation and treatment planning.
40 studies on the registry are indexed under Dentofacial Deformities; 16 are open to participants now.
This study's planned enrollment of 18 is below the median of 45 across 15 observational studies indexed under Dentofacial Deformities.
Browse Dentofacial Deformities studies →Kırıkkale University is the lead sponsor of 114 studies on the registry; 24 are open to participants now.
Counted across the registry records on this site, refreshed daily.
The study population will consist of adult patients aged 18-40 years with different types of malocclusion who are scheduled to undergo bimaxillary orthognathic surgery at the Faculty of Dentistry, Kırıkkale University. Eligible participants will be evaluated 1 week before surgery and 6 months after surgery using validated patient-reported outcome measures assessing depressive symptoms, self-esteem, and orthognathic quality of life.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants with skeletal Class I malocclusion undergoing bimaxillary orthognathic surgery. Changes in depressive symptoms, self-esteem, esthetic perception, and orthognathic quality of life will be evaluated before and after surgery.
Participants with skeletal Class II malocclusion undergoing bimaxillary orthognathic surgery. Changes in depressive symptoms, self-esteem, esthetic perception, and orthognathic quality of life will be evaluated before and after surgery.
Participants with skeletal Class III malocclusion undergoing bimaxillary orthognathic surgery. Changes in depressive symptoms, self-esteem, esthetic perception, and orthognathic quality of life will be evaluated before and after surgery.
Change in Depressive Symptoms
Change in depressive symptom scores measured using the Beck Depression Inventory-II (BDI-II) between the preoperative assessment (1 week before surgery) and the postoperative assessment (6 months after surgery). BDI-II is a 21-item self-report instrument used to assess the severity of depressive symptoms. Each item is scored on a scale from 0 to 3, yielding a total score ranging from 0 to 63. Higher total scores indicate greater severity of self-reported depressive symptoms. BDI-II total scores are interpreted as follows: 0-13 indicates minimal, 14-19 mild, 20-28 moderate, and 29-63 severe levels of depressive symptoms.
Time frame: 1 week before surgery and 6 months after surgery
Change in Quality of Life
Change in quality of life measured using the Orthognathic Quality of Life Questionnaire (OQLQ) between the preoperative assessment (1 week before surgery) and the postoperative assessment (6 months after surgery). OQLQ is a 22-item self-report instrument developed to assess the impact of dentofacial deformities on patients' quality of life. Each item is scored on a scale from 0 to 4, where a score of 0 indicates that the relevant condition does not bother the patient, while higher scores reflect increasing levels of concern. The item scores are summed to obtain a total score ranging from 0 to 88. Higher total scores indicate a greater negative impact of dentofacial deformity on quality of life and, consequently, poorer quality of life, whereas lower scores indicate better quality of life.
Time frame: 1 week before surgery and 6 months after surgery
Change in Self-Esteem
Change in self-esteem scores measured using the Rosenberg Self-Esteem Scale (RSES) between the preoperative assessment (1 week before surgery) and the postoperative assessment (6 months after surgery). RSES is a 10-item self-report instrument developed to assess individuals' global self-esteem and overall sense of self-worth. The scale consists of five positively worded and five negatively worded items, with responses rated on a four-point scale. In the Turkish version adapted by Çuhadaroğlu, responses are evaluated using a Guttman-based scoring system, yielding a total score ranging from 0 to 6. Higher total scores indicate lower levels of self-esteem, whereas lower scores indicate higher levels of self-esteem. Total scores are interpreted as follows: 0-1 indicates high, 2-4 moderate, and 5-6 low levels of self-esteem.
Time frame: 1 week before surgery and 6 months after surgery
Plan to share: No — De-identified individual participant data, including demographic characteristics, social media usage, Beck Depression Inventory-II (BDI-II) scores, Rosenberg Self-Esteem Scale (RSES) scores, and Orthognathic Quality of Life Questionnaire (OQLQ) results, will be made available upon reasonable request to the corresponding author after publication of the study results.
No publications or documents are linked to this record.
Started Jun 2026 (actual). Primary completion is estimated for Jun 2027, 12 months after the start.
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