An Evaluation of Nasolabial Angle and the Relative Inclinations of the Nose and Upper Lip

Nandini, S; Prashanth, CS; Somiah, Sanju K; Reddy, S R K

doi:10.5005/jp-journals-10024-1026

Cited by 22 publications

(27 citation statements)

References 26 publications

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“…This gave 3 mm retraction of the upper lip and 4 mm retraction of the lower lip with respect to the E-line, improving the facial profile from convex to straight. The morphology of the mouth also showed an improvement, with a 10° increase in the nasolabial angle and 30° decrease in the inter-vermilion angle 10,14) . In addition, the maxillary front teeth showed intrusion of 4 mm, resulting in an improvement in the gummy smile 24) .…”

Section: ) Clinical Procedures and Outcomesmentioning

confidence: 96%

“…This yielded 3 mm of retraction in the upper lip and 5 mm in the lower lip with respect to the E-line, improving the facial profile from one that was convex to one that was straight. In addition, a 20° increase in the nasolabial angle and 20° decrease in the inter-vermilion angle improved the shape of the mouth 10,14) . Moreover, the patient had complained of incomplete closure of the lips due to maxillary incisor protrusion, and this also showed an improvement after treatment.…”

Section: ) Clinical Procedures and Outcomesmentioning

confidence: 99%

“…Analyzing what will happen to the E-line and nasolabial angle due to change in the position of the lips with movement of the incisors in orthodontic treatment should allow better prediction of the mouth shape that will ensue. Orthodontic treatment involving extraction is effective in cases of protrusion of the lips and a small nasolabial angle 10) . The nasolabial angle plays an important role in human esthetics.…”

Section: ) Nasolabial Anglementioning

confidence: 99%

“…Here, we report a dramatic improvement in esthetics by means of orthodontic anchor screws in two patients who visited our clinic with the main complaint of protrusion of the lips. Improvement of the shape of the mouth can be evaluated in reference to the E-line [11][12][13] or nasolabial angle 3,10) . Morphological change was observed in the lips in both the present cases, so change in the vermilion was also evaluated 14,23) .…”

Section: Introductionmentioning

confidence: 99%

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Esthetic Improvement through Orthodontic Treatment Involving Extraction: Use of Orthodontic Anchor Screws

Katada

2018

Bull. Tokyo Dent. Coll.

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Here, we report two cases of dental bimaxillary protrusion in which orthodontic anchor screws were used to improve the esthetics of the mouth and lips and facilitate complete closure of the mouth. Case 1 was a woman with dental maxillary protrusion and constriction of the dental arches, with the main complaint of protrusion of the lips and mandibular crowding. The maxillary and mandibular dental arches were first widened and traction applied to the maxilla via orthodontic anchor screws. The maxillary incisors were retracted 10 mm and the mandibular incisors 3 mm, resulting in upper lip retraction of 3 mm and bottom lip retraction of 5 mm with respect to the E-line. The nasolabial angle increased to 20°, and the inter-vermilion angle, which indicates the thickness of the vermillion, decreased to 20°, improving esthetics by reducing the thickness of the lips. Case 2 was a woman with bimaxillary dental protrusion, with the chief complaint of protruding lips and a gummy smile. Orthodontic anchor screws were used to achieve posterior traction and intrusion in the maxillary incisor region to improve the gummy smile. The maxillary incisors were retracted 9 mm and the mandibular incisors 8 mm. In the soft tissues, this yielded upper lip retraction of 3 mm and bottom lip retraction of 4 mm with respect to the E-line. The nasolabial angle increased to 10° and the inter-vermilion angle decreased to 30°, improving esthetics by reducing the thickness of the lips. The gummy smile was also improved, with 4 mm intrusion of the maxillary incisors. Increased ease in closing of the mouth was also a major factor in patient satisfaction with the results of orthodontic treatment.

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Section: ) Clinical Procedures and Outcomesmentioning

confidence: 96%

Section: ) Clinical Procedures and Outcomesmentioning

confidence: 99%

Section: ) Nasolabial Anglementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Esthetic Improvement through Orthodontic Treatment Involving Extraction: Use of Orthodontic Anchor Screws

Katada

2018

Bull. Tokyo Dent. Coll.

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“…But only few studies were done in past to establish cephalometric standards in Indian communities and applying the standards of Caucasians to other ethnic groups may result in incorrect treatment. [891011]…”

Section: Introductionmentioning

confidence: 99%

Cephalometric evaluation of natural head position in Lingayat population of Karnataka

Singh¹,

Kumar²,

Raj

et al. 2019

J Pharm Bioall Sci

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Aims and Objectives: To ascertain norms in cephalometry for 11- to 13-year-old Lingayat children in natural head position (NHP). Materials and Methods: Lateral cephalograms of children were obtained by using fluid level device. We determined the variance in Frankfort horizontal plane (FHP) inclination to extracranial horizontal in NHP. The G * Power, version 20 for Windows was used for analysis. Results: Reduced facial convexity was observed when the analysis was carried out in relation to true horizontal with significant difference of “ t ” value of 3.05 and percentage difference of 1.1 ( P < 0.01) and for girls “ t ” value of 9.69 and percentage difference of 2.5 ( P < 0.001). The highest correlation coefficient for Lingayat boys ( r = 0.77) was seen between palatal plane and occlusal plane. We found least correlation coefficient among FHP and Sella–nasion plane (SNP). The coefficient was r = 0.62 and correlation coefficient of r = 0.70 was between FHP and determination coefficient r 2 = 0.38 or 38%. For girls, highest correlation coefficient of r = 0.70 was seen among FHP and palatal plane. Conclusion: Conventional study of craniofacial forms of Lingayat children showed the average skeletal pattern as Class II with retrognathic mandible in comparison to Caucasians. However, when seen in NHP by new method of analysis based on the true horizontal, the skeletal model was Class III in comparison to Caucasians.

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Influence of dental education on eye gaze distribution when observing facial profiles with varying degrees of lip protrusion

Fujii

Onuma

Nakamura

et al. 2020

Journal of Dental Education

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Objectives The purpose of the present study was to investigate the influence of dental education on eye gaze distribution when perceiving facial profile images with varying degrees of lip protrusion. Methods Fifty‐one subjects with dental education (dental‐education group) and 47 without dental education (no‐dental‐education group) were included in this study. The eye gaze distribution of the subjects was recorded for 10 seconds using a non‐contact eye tracker when determining whether or not the subjects judged each various facial profile image inappropriate. The facial profile images had varying degrees of upper‐lip and lower‐lip protrusion. The frequency of eye fixation (lasting >0.06 seconds) was counted. The duration was measured as the total time of eye fixation. The facial images were divided into 4 regions of interest (ROIs): the forehead (ROI‐I); the orbit and nose root (ROI‐II); the nose tip and upper lip (ROI‐III); and the lower lip and chin (ROI‐IV). The frequency and duration of eye fixation on each ROI was compared. Results The frequency of eye fixation on ROI‐II was greater in comparison to ROI‐I and ROI‐IV. The frequency of eye fixation on ROI‐III was also greater in comparison to ROI‐I and ROI‐IV. The duration of eye fixation on ROI‐III in the dental‐education group was longer in comparison to the no‐dental‐education group. Conclusions Dental education influenced the eye fixation on the nose tip and upper lip when perceiving facial profile images.

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An Evaluation of Nasolabial Angle and the Relative Inclinations of the Nose and Upper Lip

Cited by 22 publications

References 26 publications

Esthetic Improvement through Orthodontic Treatment Involving Extraction: Use of Orthodontic Anchor Screws

Esthetic Improvement through Orthodontic Treatment Involving Extraction: Use of Orthodontic Anchor Screws

Cephalometric evaluation of natural head position in Lingayat population of Karnataka

Influence of dental education on eye gaze distribution when observing facial profiles with varying degrees of lip protrusion

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