Smile Analysis In Orthodontics

Smile Analysis In Orthodontics

Write short note on smile analysis in orthodontics.
Answer. Smile analysis is the prerequisite for proper treatment planning and diagnosing the orthodontic problem.

Types of Smile

• Posed smile: It is voluntary and should not be accompanied by any of the emotion. Pose smile is static and can be sustained. Pose smile is actually the learned greeting which is characterized by less lip elevation.
• Unposed smile: This is natural and shows authentic human emotion. This is spontaneous and is characterized by more lip elevation.

Smile analysis in orthodontics

“Understanding the role of smile analysis in orthodontic treatment: Q&A explained”

Features of Smile

Following are the three characteristics of smile, i.e.

• Vertical characteristics
• Transverse characteristics
• Oblique characteristics

“Importance of studying smile analysis for better orthodontic outcomes: Questions explained”

Vertical Characteristics

• It has two main features, i.e.
  • Pertaining to incisor display
  • Pertaining to gingival display
• Inadequate incisor display is due to vertical maxillary deficiency which is restricted to lip mobility as well as short clinical crown.
• In persons having normal smile, gingival margins of canine are coincident with upper lip. Lateral incisors should be positioned slight inferiorly.
• Presence of gummy smile is associated with the vertical maxillary excess.
• Amount of incisor proclination can affect how much incisors are displayed on smile. Flare incisors reduce gingival display while upright maxillary incisors increases incisor display.

“Common challenges in performing smile analysis effectively: FAQs provided”

Orthodontic smile design

Transverse Characteristics

It consists of three important features:

• Buccal corridor width
• Arch form
• Transverse cant

Smile aesthetics in orthodontics

Buccal Corridor Width

• Calculation of buccal corridor is done from mesial line angle of maxillary first premolar to inner portion of commissure of lip.
• Representation of corridor is done by ratio of intercommissure width divided by distance from one maxillary fist premolar to opposite side of fist premolar.
• Excessive wide buccal corridor is called as negative space.

“Steps to explain different types of smile analysis: Static vs dynamic smile: Q&A guide”

Arch Form

• It plays an important role in the form of smile.
• Patients having collapsed arch and narrow maxilla shows narrow smile and their buccal corridor is wide.
• As orthodontic expansion of arch is carried out it improves smile by decreasing buccal corridor.
• Transverse smile dimension also get improved.

Transverse Cant

• Appearance of transverse cant or tilt of the smile line can be due to asymmetrical vertical growth of arches or due to differential eruption of teeth.
• Ideally transverse cant should be absent.

“Role of frontal smile analysis in orthodontic diagnosis: Questions answered”

Oblique Characteristics

• Maxillary occlusal plane from premolar to premolar is consonant along with curvature of the lower lip on smiling.
• If lower lip shows deviation on smiling there is downward tilt of posterior maxilla or upward tilt of anterior maxilla.