Maxillary Anterior Teeth and Facial Index Parameters in Correlation With Recurring Esthetic Dental Proportion

The goal of this cross-sectional study is to state the inter relation between anthropometric parameters of pristine maxillary anterior teeth and facial index and their correlation with recurring esthetic dental proportion (RED) using 3D digital software (Medit) with intra intraoral scanner.The study comprised of 20 adult out patients with an equal number of males and females who had 20-35 years old.

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Key information

Conditions

There is no Disease the Study Focus on Facial Index in Relation to RED Erythema Pathological Conditions, Signs and Symptoms Signs and Symptoms Skin Diseases Skin Manifestations Skin and Connective Tissue Diseases

Age range

20 year–35 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Al Azhar University, Cairo, Egypt

About this study

The research focuses on analyzing the proportions of maxillary anterior teeth in relation to facial measurements, particularly within the Egyptian population. It evaluates how closely these dimensions align with the Recurring Esthetic Dental (RED) proportions, which suggest that the width of anterior teeth should decrease by a constant ratio moving distally. Using advanced digital tools such as the BELLUS 3D face scanner and MEDIT i700 intraoral scanner, the study collected detailed facial and dental measurements from participants to explore the correlation between facial index and tooth dimensions. The sample consisted of 20 participants (10 males and 10 females), with data analyzed using statistical methods to assess symmetry and gender variations in these proportions.). Moreover the results were statistically analyzed using the Independent t-test or an equivalent non-parametric test was used for comparison between the two groups, and the Pearson's correlation coefficient (r) test was used for correlating different parameters.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

must be in the same age group (20-35). 2. free of systemically disease (GI, D.M., gastric influx). 3. Free of facial asymmetry. 4. Free of facial trauma or surgeries. 6.Normal Class 1 occlusion. 7. Free from any tooth wear disorder. 8.periodontally healthy without any previous orthodontic treatment. 9. Maxillary anterior teeth free from restoration

Exclusion criteria

History of surgery in the anterior maxillary or mandibular region. 2. Restorations in anterior sextant. 3 pregnant or lactating females. 4. gingival hyperplasia. 5. orthodontic treatment. 6. Facial asymmetry and clefts 7.Smokers patient

Treatment and study plan

Bellus 3D smart application

Device

Bellus3D is a modern multi-digital digicam, 3-D face scanning that captures in an expert grade, complete 3-D face scans with the pressing of an unmarried button in seconds. It takes 10 s to create an excessive decision 3-D face scan. Bellus3D's excessive precision scanning detects the soft tissue parameters and over a hundred facial andmarks. It uses two Infrared structured light VCSEL (vertical-cavity surface-emitting laser) projectors for high-resolution face scanning. The technique of facial scanning by (Bellus3D) and measuring facial index by (Medit) software was performed following manufacture instructions , The patient's head Stabilized and aligned with the center of the face scan software (Bellus 3D) to avoid scan distortion, The head was tilted towards right and then towards left along with the face analog in the scan software combined with upward and downward movement to ensure complete detection and record of facial landmarks. Then the obj 3D file exported to Medit Software.

Medit i-700 intraoral scanner

Device

Medit i-700 intra oral scanner was used to measure the teeth dimensions , it has several advantages including that it can capture up to 70 FPS (FRAMES PER SECOND), which is significantly faster than the previous model. It delivers high image resolution for better quality. The Medit i700 offers a remote control mode and a built-in UV-C disinfection function. In this study a zigzage movement was used which more accurate rout for recording all anterior teeth dimensions and surrounding tissue while scanning. In agreement with a previous study, we started from the posterior left area by scanning the occlusal side, then it proceeded toward the posterior right area by following a zigzag movement when the anterior teeth were scanned. After the occlusal area, the palatal/lingual side was scanned from the right to the left area, and then the buccal side was scanned from the posterior left area to the posterior right one,Then the obj 3D file exported to Medit Software.

Primary outcomes

parameters of pristine maxillary anterior teeth and facial index in correlation with recurring esthetic dental proportion (RED)

Time frame: 20 years old to 35years old

Assessment of facial index and facial forms:the morphological face height (n-gn) was measured as the distance between the nasal root (n: nasion) and the lowest point of the lower border of mandible in the mid-sagittal plane, (gn: gnathion), while the maximum facial width was considered as bizygomatic width (zy-zy)which was measured from the left zygion to the right zygion.All measurements were performed by a 3D face scanning software (BELLUS 3D). the overall facial form was calculated according to the formula FI = FW / FH× 100. Assessment of Maxillary Anterior Teeth Dimensions:The dimensions of Maxillary anterior teeth were measured for each case as: width and length of central, lateral and canines, in both right and left segments and inter canine distance. All dimensions were measured using scans which were taken by MEDIT i700 intraoral scanner.Correlating the results with RED proportion :The formula for determining the ideal width of the central incisor is:CIW =ICW/2 (1+RED+RED2).

Sponsors and collaborators

Lead sponsor

Al-Azhar University

Other

Registry information

Official study title

Anthropometric Parameters of Pristine Maxillary Anterior Teeth and Facial Index in Correlation With Recurring Esthetic Dental Proportion (RED) by 3D Digital Software

Acronym: RED

Important dates

Study start: 2022
Primary completion: 2022
Study completion: 2022
First posted: Feb 6, 2025
Registry last updated: Feb 21, 2025

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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