An observational study in Adiposity, Dental Diseases and Bariatric Surgery Candidate, sponsored by University of Göttingen. Completed at 1 site in Germany. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-01-27.
Sponsored by University of Göttingen · Observational
As few is known about the oral health of bariatric patients, this study aimed to analyze the prevalence and severity of erosive tooth wear, dental caries and periodontal diseases of obese patients who underwent bariatric surgery in comparison to obese patients without bariatric procedures.
The prevalence of overweight and obesity is increasing since the 1980s. Being associated with several risk factors such as hypertension, hyperinsulinemia and hyperlipidemia, obesity presents an immediate and long-term health risk for diabetes mellitus, heart diseases, osteoarthritis and certain forms of cancer. For the control of obesity several therapy options have been developed: Beside conservative treatments including change of diet and lifestyle, bariatric surgery is considered as a promising option for patients with severe obesity (BMI ≥ 40 kg/m2). Allowing impressive weight loss from 40 to 80% and effective reduction of comorbidities, bariatric surgery shows some negative/adverse effects as well, like kidney problems, hyperparathyroidism, anemia and metabolic bone diseases. For oral health, two facts are particularly important to consider: Firstly, chronic regurgitation reaching the oral cavity is an important risk factor for erosive tooth wear which initially appear as smooth silky-shining glazed surfaces. Further progress is often associated with hypersensitivities and aesthetic deficits. Over time, often substantial loss can been observed, provoking hypersensitivities and aesthetic deficits. Secondly, depending on the type of bariatric surgery, pronounced postoperative metabolic and nutritional changes can be observed which also might influence oral health. Aim of this study is to analyze the prevalence and severity of erosive tooth wear, dental caries and periodontal diseases of obese patients who underwent bariatric surgery in comparison to obese patients without bariatric procedures.
11,522 studies on the registry are indexed under Obesity; 2,033 are open to participants now.
This study's enrollment of 61 is below the median of 114 across 2,154 observational studies indexed under Obesity.
Browse Obesity studies →University of Göttingen is the lead sponsor of 37 studies on the registry; 3 are open to participants now.
Counted across the registry records on this site, refreshed daily.
The study enrolls obese adults (Age over 18 years) with an BMI (body mass index) of at least 25 kg/m2 without or after bariatric surgery
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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
obese adults (≥ 18 years) who underwent bariatric surgery
obese adults (≥ 18 years) who did not underwent bariatric surgery at the time of the examination
Oral health of obese adults without bariatric surgery - attachment loss
probing depths (mm) + recessions (mm)
Time frame: 10-15 Minutes
Oral health of obese adults without bariatric surgery - BOP
BOP (Bleeding on probing, %) as indicator of inflammation
Time frame: 2 Minutes
Oral health of obese adults without bariatric surgery - dental caries
ICDAS (International Caries Detection and Assessment System II, 0-6), presence of restaurations/ crowns (yes/no): calculation of DMFT
Time frame: 2-5 Minutes
Oral health of obese adults without bariatric surgery - erosive tooth wear
BEWE (Basic erosive wear examination, 0-3)
Time frame: 1-2 Minutes
Oral health of obese adults after bariatric surgery - attachment loss
probing depths (mm) + recessions (mm)
Time frame: 10-15 Min
Oral health of obese adults after bariatric surgery - BOP
BOP (Bleeding on probing, %) as indicator of inflammation
Time frame: 2 Minutes
Oral health of obese adults after bariatric surgery - dental caries
ICDAS (International Caries Detection and Assessment System II, 0-6), presence of restaurations/ crowns (yes/no): calculation of DMFT
Time frame: 2-5 Minutes
Oral health of obese adults after bariatric surgery - erosive tooth wear
BEWE (Basic erosive wear examination, 0-3)
Time frame: 1-2 Minutes
Ran from Jun 2018 to primary completion in Feb 2020, 19 months.
Of 791 non-industry observational studies under Obesity, half reached primary completion within 40 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 106. This study's 19 months is below that.
Counting every sponsor, half of 836 studies reached it within 39 months; a quarter within 17 and three quarters within 96.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Jan 2026. You cannot join it, but the record below documents what was studied.
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University of Göttingen