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[Light reflection zone on the incisors' surface--a new parameter for smile esthetics evaluation]
N Brezniak1, A Wasserstein, T Shmuli
1IDF, Tel Hashomer, Israel.
Refu'At Ha-Peh Veha-Shinayim (1993)
|December 22, 2012
Summary
The light reflection zone (LRZ) on teeth is a new parameter for smile aesthetics. Most people prefer smiles where the LRZ appears lower, near the gingiva, indicating a more attractive smile.
Area of Science:
- Dentistry
- Aesthetic Dentistry
- Facial Aesthetics
Context:
- The light reflection zone (LRZ) is a visible bright area on maxillary central incisors.
- Previous research linked LRZ location to incisor inclination.
- The LRZ's role in smile aesthetics was previously unexplored.
Purpose:
- To investigate if the LRZ location influences perceived smile aesthetics.
- To determine if the LRZ can be a new parameter for diagnosing smile aesthetics.
Summary:
- 138 participants evaluated paired photographs with varying LRZ positions (gingival vs. incisal).
- Most participants did not notice subtle LRZ shifts.
- When differences were perceived, the gingival LRZ position was consistently rated as more aesthetically pleasing, especially for models (p < 0.05).
Impact:
- The LRZ is a novel, unrecognized parameter for smile aesthetic assessment.
- A gingival LRZ location is preferred in the general population for a nicer smile.
- Further research into the LRZ is recommended across various dental disciplines, including orthodontics.
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