Evaluation of lip position using different reference lines

Atanasova, Sandra and Proseva, Ljubica and Carceva-Salja, Sofija and Papakoca, Kiro and Zarkova Atanasova, Julija and Zlatanovska, Katerina (2022) Evaluation of lip position using different reference lines. In: 9th Congress of Macedonian dental society with international participation "Challenging new era in dentistry: burden and opportunities", 15-18 Sept 2022, Ohrid, Republic of North Macedonia.

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Abstract

Aim: The aim is to assess the position of the lips in relation to the three reference lines in individuals with class I, II and III malocclusion.
Material and method: The sample includes 15 individuals (9 females and 6 males), aged 22 years without a history of previous orthodontic treatment, divided into three groups based on the Angle classification. The first group consists of subjects with class I malocclusion, the second group with class II malocclusion and the third group with class III malocclusion. Profile photographs were taken using a Nikon Z6 II-24.5 MP digital camera with a NIKKOR Z 85mm f/1.8 lens and a Godox AD200 flash. Reference planes used are the Steiner S-line, the Rickett E-line and the Burstone B-line.
Results: The mean value of the position of the upper and lower lip was calculated. Rickett E-line in the first group (UL=-3.7; LL=-1.8), second group (UL=-4.87; LL=- 4.75), third group (UL=-6.5; LL=-4), while in relation to the whole sample the following results were obtained (-5.03; -3.52). S-line in the first group (UL=-0.5, LL=-0.2), second group (UL=-1.6; LL=-2.7), third group (UL=-3.1; LL=-1.8), whole sample (-1.7; -1.6). Burstone B-line in the first group (UL=3.75, LL=1.8), second group (UL =1.62; LL=-1.2), third
group (UL=0.8; LL=0.51), whole sample (2.06; 0.37).Regarding the E line, the greatest retrusion of the upper lip was observed in the subjects with class III malocclusion, the highest values of the lower lip were obtained in class II malocclusion. When evaluated according to Steiner’s reference line, similar results were obtained. During the B-line analysis, the largest deviations from the reference values were observed in relation to the position of the upper lip in the subjects with class III malocclusion and the lower lip in the class II malocclusion.
Conclusion: The position of the lips has been found to be related to the type of malocclusion.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Medical and Health Sciences > Health sciences Medical and Health Sciences > Other medical sciences
Divisions:	Faculty of Medical Science
Depositing User:	Sandra Atanasova
Date Deposited:	01 Feb 2023 10:50
Last Modified:	01 Feb 2023 10:50
URI:	https://eprints.ugd.edu.mk/id/eprint/31149

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