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Symmetry
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Symmetry in Dentistry: From the Clinic to the Lab II
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Symmetry in Dentistry: From the Clinic to the Lab II

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Life Sciences".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 8639

Special Issue Editors

Dr. Carlos Miguel Marto

E-Mail Website
Guest Editor
1. Institute of Integrated Clinical Practice, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
2. Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
3. Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
4. Clinical Academic Center of Coimbra (CACC), 3000-354 Coimbra, Portugal
5. Center for Innovative Biomedicine and Biotecnhology (CIBB), 3000-354 Coimbra, Portugal
6. Institute of Experimental Pathology, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
Interests: experimental pathology; stem-cells; regeneration; animal models; dentistry; biocompatibility; evidence-based medicine
Special Issues, Collections and Topics in MDPI journals
Dr. Ana Cristina Gonçalves

E-Mail Website
Guest Editor
Faculty of Medicine, Laboratory of Oncobiology and Hematology, Institute for Clinical and Biomedical Research (iCBR)—Area of Environment Genetics and Oncobiology (CIMAGO), University of Coimbra, 3000-548 Coimbra, Portugal
Interests: oncobiology; genetics; molecular biology; nutrition; drug resistance
Special Issues, Collections and Topics in MDPI journals
Dr. Mafalda Laranjo

E-Mail Website
Guest Editor
Faculty of Medicine, Area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics and Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, 3000-548 Coimbra, Portugal
Interests: dentistry; dental biomaterials; photodynamic therapy; cancer; in vitro and animal models
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Due to the great success of our Special Issue "Symmetry in Dentistry: From the Clinic to the Lab" we decided to set up a second volume.

Although not always evident, symmetry is present in all aspects of our lives, from nature to human built structures, from macrostructures to the smallest components of our cells. The human body is no exception, and symmetry plays a fundamental role in human morphology, aesthetics and function.

In the field of dentistry, symmetry is responsible for the perfect balance between the oral structures, the beauty of the face and the smile, and the adequate function of the stomatognathic system. Due to its importance, we aim for symmetry in our daily practice, performing treatments and developing materials to restore the lost tissues, functions and aesthetics. Many of these materials present a symmetrical structure, which directly influences their properties.    

In this Special Issue of Symmetry, we will focus on symmetry in dentistry, from the clinic to the laboratory. We are interested in the application of symmetry in modern dentistry, covering the face, smile and teeth aesthetics and morphology, smile design, applications of symmetry for orthodontic and surgical treatments, symmetry on human development of the craniofacial region, and symmetrical patterns on oral diseases, among others. Importantly, papers discussing the role of natural asymmetry are welcome, since beauty is not always symmetrical. 

At the same time, we are focused on discussing the role of symmetry and asymmetry in the development and evaluation of biomaterials, such as ceramics, composites or polymers. This includes their design and structure, but also a strong focus on their biological behavior, from in vitro to in vivo models. Particularly, their effect at the tissue and cellular level is of great interest, from the impact on protein expression and function, DNA and RNA synthesis, cell membranes alterations, or cytoskeletal modifications, among others.

Lastly, the importance of symmetry on cell division and behavior, mainly stem cells from dental origin or for oral tissues regeneration, presents an exciting topic to be discussed.

We invite you to read the Special Issue at https://www.mdpi.com/journal/symmetry/special_issues/Symmetry_Dentistry_Clinic_Lab.

Dr. Carlos Miguel Marto
Dr. Ana Cristina Gonçalves
Dr. Mafalda Laranjo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • symmetry
  • dentistry
  • dental biomaterials
  • aesthetics
  • stem cells
  • in vitro models
  • in vivo models
  • smile design

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Published Papers (3 papers)

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Research

12 pages, 1181 KiB  
Article
Relapse after Orthodontic-Surgical Treatment: A Retrospective Longitudinal Study
by João Matos, Raquel Travassos, Francisco Caramelo, Madalena Prata Ribeiro, Filipa Marques, Carlos Miguel Marto, Anabela Baptista Paula, Catarina Nunes, Inês Francisco and Francisco Vale
Symmetry 2023, 15(5), 1083; https://doi.org/10.3390/sym15051083 - 15 May 2023
Cited by 1 | Viewed by 3806
Abstract
Long-term stability is a crucial point in order to keep the patient’s aesthetic and functional balance. The aim of this study was to evaluate dental and skeletal relapse in patients who underwent orthodontic-surgical treatment. This retrospective study included 25 patients who corrected their [...] Read more.
Long-term stability is a crucial point in order to keep the patient’s aesthetic and functional balance. The aim of this study was to evaluate dental and skeletal relapse in patients who underwent orthodontic-surgical treatment. This retrospective study included 25 patients who corrected their dentofacial deformity through orthodontics and orthognathic surgery. The dental casts and lateral cephalograms were evaluated prior to orthodontic treatment (T0), final of orthodontic-surgical treatment (T1) and long-term retention phase (T2). The Wilcoxon test with p-value corrected by the Benjamini–Hochberg method was used to assess differences between the groups. The influence of retention duration was assessed using the Kruskal–Wallis method. The association of nominal variables and differences between quantitative variables were assessed using the Fisher and Mann–Whitney tests, respectively. No dental or skeletal variable presented statistically significant differences between the final orthodontic-surgical treatment and the long-term retention phase. Eight patients presented dental relapse (32–95% CI [12.4%; 51.7%]), but no skeletal relapse was observed in any of the 25 individuals. The type of malocclusion did not influence the relapse rate of orthodontic-surgical treatment (Fisher, p = 0.202). No differences were found between the different retention times, sex and age at the end of treatment. Orthodontic-surgical treatment showed long-term stability in the present study group. Full article
(This article belongs to the Special Issue Symmetry in Dentistry: From the Clinic to the Lab II)
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13 pages, 3537 KiB  
Article
Anatomic Comparison of Contralateral Maxillary Second Molars Using High-Resolution Micro-CT
by Ghassan Dandache, Umut Aksoy, Mehmet Birol Ozel and Kaan Orhan
Symmetry 2023, 15(2), 420; https://doi.org/10.3390/sym15020420 - 4 Feb 2023
Cited by 1 | Viewed by 1806
Abstract
The present study aimed to measure and compare anatomic parameters in contralateral maxillary second molars. A total of 18 intact maxillary second molar pairs (n = 36) extracted from 18 patients were scanned with micro-computed tomography (micro-CT) and then reconstructed. Axial, sagittal, [...] Read more.
The present study aimed to measure and compare anatomic parameters in contralateral maxillary second molars. A total of 18 intact maxillary second molar pairs (n = 36) extracted from 18 patients were scanned with micro-computed tomography (micro-CT) and then reconstructed. Axial, sagittal, and cross-sectional slices were used to analyze the parameters (lengths, widths, and thicknesses) and evaluate the symmetry of the right and left sides. The number of root canals and their internal patterns were classified following Vertucci’s classification. The number of lateral canals and their locations were also noted. Contralateral second molar pairs demonstrated a high degree of similarity in terms of the linear measurements (lengths, widths, and thicknesses). The root canal anatomy configuration symmetry of mesiobuccal, distobuccal, and palatal roots according to Vertucci’s classification were 41.1%, 88.2%, and 94.4%, respectively. In total, 41.6% of mesiobuccal roots, 2.7% of distobuccal roots, and 30.6% of palatal roots had at least one lateral canal. The apical third (38.7%) was the most frequent location of lateral canals, followed by the middle third (32.3%) of the root. This study provides insight into the anatomy of the root canals of contralateral maxillary second molars, which is valuable for both practitioners and researchers. Full article
(This article belongs to the Special Issue Symmetry in Dentistry: From the Clinic to the Lab II)
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13 pages, 2023 KiB  
Article
Finite Element Analysis of an Implant-Supported FDP with Different Connector Heights
by Laura H. J. Alberto, Lohitha Kalluri, Josephine F. Esquivel-Upshaw and Yuanyuan Duan
Symmetry 2022, 14(11), 2334; https://doi.org/10.3390/sym14112334 - 7 Nov 2022
Cited by 2 | Viewed by 2098
Abstract
All-ceramic fixed dental prostheses (FDPs) tend to fracture in the connector areas, due to the concentration of tensile stresses. This study aimed to evaluate the role of connector height on the stress distribution of a posterior three-unit implant-supported all-ceramic FDP using finite element [...] Read more.
All-ceramic fixed dental prostheses (FDPs) tend to fracture in the connector areas, due to the concentration of tensile stresses. This study aimed to evaluate the role of connector height on the stress distribution of a posterior three-unit implant-supported all-ceramic FDP using finite element analysis (FEA). Two titanium dental implants, their abutments, screws, and a three-unit all-ceramic FDP were scanned using a micro-CT scanner. Three 3D models with altered distal connector heights (3, 4, and 5 mm) were generated and analyzed on ABAQUS FEA software. The maximum principal stress values in MPa observed for each model with different connector heights and their respective locations (MA = mesial abutment; DA = distal abutment; F = framework; V = veneer) were: 3 mm—219 (MA), 88 (DA), 11 (F), 16 (V); 4 mm—194 (MA), 82 (DA), 8 (F), 18 (V); 5 mm—194 (MA), 80 (DA), 8 (F), and 18 (V). All the assembled models demonstrated the peak stresses at the neck area on the mesial abutments. The connector height had a significant influence on the stress distribution of the prosthesis. The models with higher distal connectors (4 and 5 mm) had a lower and more uniform distribution of maximum principal stresses (except for the veneer layer) when compared with the model with the smallest distal connector. Full article
(This article belongs to the Special Issue Symmetry in Dentistry: From the Clinic to the Lab II)
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