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The Distribution of Gingival Display and Possible Related Factors Resulting in Gummy Smile

Evaluating the Distribution of Gingival Display and Possible Related Factors Resulting in Gummy Smile

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT04553952
Enrollment
501
Registered
2020-09-18
Start date
2019-11-09
Completion date
2020-03-22
Last updated
2020-09-18

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

Conditions

Gummy Smile

Brief summary

This study primarily aimed to evaluate smile line distribution and prevalence of gummy smile in patients. The secondary purpose was to examine parameters that might be risk factors for gummy smile.

Detailed description

this study primarily aimed to evaluate smile line distribution and prevalence of gummy smile in patients. The secondary purpose was to examine parameters that might be risk factors for gummy smile.Age, gender, marital status, medical history, and medication status of the patients were recorded. All individuals were instructed to sit on a dental chair and the measurments were made by using a millimetric ruler.Next, the patients were grouped according to Liebart's classification by gingival display at maximum smile as follows: Class 1.Excessive gingival display (Gummy smile): ≥ 3mm gingival display Class 2.High smile line: 0-2 mm of gingival display Class 3. Average smile line: Dental papilla is visible. Class 4. Low smile line: Gingival margin, dental papilla is not visible at all. Presence of altered passive eruption, short lip and hypermobile upper lip were also evaluated.

Interventions

OTHERMeasurement of gingival display

All individuals were instructed to sit on a dental chair and the measurements were made by using a millimetric ruler. Next, the patients were grouped according to Liebart's classification by gingival display at maximum smile as follows: Class 1.Excessive gingival display (Gummy smile): ≥ 3mm gingival display Class 2.High smile line: 0-2 mm of gingival display Class 3. Average smile line: Dental papilla is visible. Class 4. Low smile line: Gingival margin, dental papilla is not visible at all.

Sponsors

Baskent University
Lead SponsorOTHER

Eligibility

Sex/Gender
ALL
Age
20 Years to 61 Years
Healthy volunteers
Yes

Inclusion criteria

* presence of teeth in upper jaw * Age between 18-65 years

Exclusion criteria

* Patients who have received and/or are receiving orthodontic treatment and patients who received gummy smile treatment were excluded.

Design outcomes

Primary

MeasureTime frameDescription
Measurement of gingival display1 minuteAll individuals were instructed to sit on a dental chair and the measurments were made by using a millimetric ruler. Next, the patients were grouped according to Liebart's classification by gingival display at maximum smile as follows: Class 1.Excessive gingival display (Gummy smile): ≥ 3mm gingival display Class 2.High smile line: 0-2 mm of gingival display Class 3. Average smile line: Dental papilla is visible. Class 4. Low smile line: Gingival margin, dental papilla is not visible at all.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026