Purpose: To investigate the influence of a single infrapositioned ankylosed tooth or implant-supported restoration on smile esthetics.
Materials And Methods: A series of 48 digitally modified images that simulated varying degrees of infraposition (from 0.25 to 2.0 mm, with a step of 0.25 mm) were created for each maxillary anterior tooth by altering the full-portrait image of a smiling man, adjusted to show medium and high smile lines. For the model with the high smile line, a series of 24 digitally modified images were created that simulated the infraposition of a single anterior tooth with a restored incisal edge. Smile esthetics for each of the images were evaluated by 160 participants (80 dentists and 80 laypersons), and a visual analog scale (VAS) was implemented.
Results: For the images with the high smile line, an infraposition of ≥ 0.25 mm in the central incisor region and ≥ 0.5 mm in the region of the lateral incisor or the canine had a negative effect on the perceived smile esthetics for both the dentists and the laypersons. Regarding the medium smile line, an infraposition of ≥ 0.5 mm in the central and lateral incisor region had a negative effect on the perceived smile esthetics for both groups of observers. In the canine area, an infraposition of ≥ 0.5 mm for the dentists and ≥ 0.75 mm for the laypersons also had a negative impact on the smile esthetics.
Conclusions: Even a minor infraposition of a single maxillary anterior ankylosed tooth or implant-supported restoration can reduce the perceived attractiveness of the smile. Infraposition in the canine site can be better tolerated in a medium smile line compared to a high smile line. In patients with a high smile line, prosthetic intervention is needed to restore the incisal edge of an infrapositioned tooth without harmonizing the gingival contour; this can be beneficial for the lateral incisor but ineffective for the central incisor and unfavorable for the canine.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.11607/jomi.10749 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Metastasis to jaw bones from renal cell carcinoma as the sole primary source: Systematic review.
Natl J Maxillofac Surg
November 2024
Certified Dental Assistant, Ladner Village Dental, Vancouver, BC, Canada.
Renal cell carcinoma (RCC) has been known for its high propensity of metastasis to unusual locations, and jaw bones (JBs) are one among those sites. The literature has reported several studies analyzing metastatic tumors to the oral region, but very little research work has been published to date to analyze solely JB metastasis (JBM) via RCC. The goal of this study was to examine the published cases of metastasis to JBs from RCC as the sole primary source till date.
View Article and Find Full Text PDFAssessment of complications in adjacent natural teeth compared to contralateral teeth in single posterior implant cases.
Sci Rep
January 2025
Department of Oral Rehabilitation, the Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, 6997801, Israel.
Osseointegrated dental implants represent a successful treatment modality for partial and complete edentulism. However, concerns persist regarding their impact on adjacent natural teeth. Conflicting literature exists regarding complications such as caries, mobility, and fractures in neighboring teeth, with few studies comparing these effects with those observed in contralateral natural teeth.
View Article and Find Full Text PDFA Prospective Study of a Custom-Made Eco-Friendly Thyroid Shield: A Breakthrough in Radiation Protection.
Cureus
December 2024
Department of Oral Medicine and Radiology, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Vijayawada, IND.
Background The thyroid gland is the most susceptible organ to radiation during the exposure of teeth because the thyroid area appears to be within the primary beam, and the dose levels are relatively high even after using collimation. This study aims to develop an eco-friendly thyroid shield by reusing lead foils from intra-oral periapical radiographic films and evaluate its effectiveness in intraoral radiography. Methods A total of 16 patients undergoing endodontic procedures who gave written consent to participate in the study were included and divided into four categories: anterior, canine, premolar, and molar.
View Article and Find Full Text PDFBiochemical components of corneal stroma: a study on myopia classification based on Raman spectroscopy and deep learning methods.
Biomed Opt Express
January 2025
Center for Biomedical-photonics and Molecular Imaging, Advanced Diagnostic-Therapy Technology and Equipment Key Laboratory of Higher Education Institutions in Shaanxi Province, School of Life Science and Technology, Xidian University, Xi'an, Shaanxi 710126, China.
The study aimed to identify differences in the biochemical composition of corneal stroma lenses across varying degrees of myopia using Raman spectrum characteristics. Corneal stroma lens samples from 38 patients who underwent small incision lens extraction (SMILE) surgery, were categorized into low (n = 9, spherical power -3.00D), moderate (n = 23, spherical power < -3.
View Article and Find Full Text PDFStability of small incision lenticule extraction over laser in situ keratomileusis at an altitude of 3874 m.
Sci Rep
January 2025
Xinqiao Hospital, Army Medical University, 183th, Xinqiao Street, Shapingba District, Chongqing, China.
The purpose of this study was to evaluate the stability of small-incision lenticule extraction (SMILE) and laser in situ keratomileusis (LASIK) when ascending from near sea level to an altitude of 3874 m. The visual acuity (VA), intraocular pressure (IOP), spherical equivalent refraction (SER) and biometric parameters of 20 normal subjects (40 eyes, controls) and 36 subjects who underwent corneal refractive surgery (35 eyes with SMILE and 36 eyes with LASIK) were examined in Chongqing (C, 500 m above sea level) and 7-10 days after a collective travel to Shigatse (S, 3874 m above sea level). SER and corneal thickness (CT) were choosed as main indicators of the stability of corneal refractive surgery at high altitude.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!