Showing 8 results for Orthodontics
S. Khedmat ,
Volume 18, Issue 1 (3-2005)
Abstract
The purpose of this article was reviewing the literature related to the mutual effects of endodontics and orthodontics on each other providing documented information that can be used by dentists in clinical practice. The effect of orthodontic treatment on the dental pulp and its role in root resorption, the influence of previous trauma to the tooth and endodontic treatment in orthodontic tooth movements and root resorption, recommendations regarding endodontic treatment during orthodontic tooth movement and the role of the orthodontic forces in provision and outcome of endodontic treatment are being discussed. The effect of the orthodontic tooth movement on the pulp is focused primarily on the neurovascular system which can cause degenerative and/or inflammatory responses in the dental pulp. Although, most of these changes are considered reversible, it seems that teeth with complete apical foramen and teeth subjected to previous insults, such as trauma, caries, restorations and periodontal diseases are more susceptible to pulpal irreversible changes. Teeth with root canal treatment that are well cleaned shaped, and three- dimensionally obturated, exhibit less propensity to apical root resorption during orthodontic tooth movement. This outcome depends on the absence of microleakage for bacterial ingress. A traumatized tooth can be moved orthodontically with minimal risk of resorption, provided that the pulp has not been severely injured (infection or necrosis). If there is evidence of pulpal demise, appropriate endodontic treatment is necessary prior to orthodontic treatment .If a previously traumatized tooth exhibits resorption, there is a greater chance that orthodontic tooth movement will enhance the resorptive process. If a tooth has been severely traumatized (intrusion, avulsion) there would be a greater incidence of resorption with tooth movement. It is recommended that teeth requiring root canal treatment during orthodontic movement be initially cleaned and shaped followed by the interim placement of calcium hydroxide. Final canal obturation with gutta-percha should be accomplished upon the completion of orthodontic treatment. Endodontically treated teeth can be moved orthodontically similar to teeth with vital pulps. In case of endodontic procedures like apexification, there may be no need to delay the orthodontic treatment.
F. Mojtahedzadeh, S. Alizadeh,
Volume 24, Issue 2 (4-2011)
Abstract
Background and Aims: Cephalometric measurements cannot be performed for screening purposes, therefore orthodontists usually have to use either photographic or anthropometric measurements in such occasions. Finding a valid and reliable alternative could be of great value. The purpose of this study was to evaluate the correlation between McNamara's cephalometric unit difference and a proposed soft tissue equivalent.
Materials and Methods: An anthropometric ruler was redesigned and used in this study. Soft tissue measurements were performed on 36 randomly selected specimens by two investigators. The soft tissue measurements included external auditory meatus to subnasale (Ext-Sn), external auditory meatus to soft tissue pogonion (Ext-Pog), and the difference between them (UDMA´). These measurements were considered as equivalents to cephalometric indices in McNamara's anteroposterior measurements, including maxillary (Co-A) and mandibular (Co-Gn) unit length and their difference (UDMA), respectively.
Results: All soft tissue variables had an intra-class correlation coefficient (ICC) above 0.90. There was a high and significant correlation between cephalometric and anthropometric measurements (P<0.01). The ICC between (Ext-Sn) and (Co-A) was 0.890, 0.869 between (Ext-Pog) and (Co-Gn), and 0.819 between UDMA´ and UDMA.
Conclusion: The proposed anthropometric method showed a good correlation with cephalometric equivalents and the results show that this method could be used for screening purposes, especially when a low-cost, non-invasive method is required. However it cannot be considered as a substitute for cephalometry in diagnostic and treatment purposes.
Faramarz Mojtahedzade, Neda Moslemi, Ahmad Sodagar, Gita Kiaee, Bita ,
Volume 30, Issue 1 (6-2017)
Abstract
Background and Aims: There is an increased risk of periodontal diseases in patients undergoing fixed orthodontic treatment. Chlorhexidine (CHX) is frequently used to promote oral hygiene; however, it is associated with several complications. Herbal mouthwashes can be used as the substitute without having similar complications. The aim the present study was to compare the effects of herbal mouthwashes (Matrica and Persica) with CHX 0.2% on the periodontal parameters of patients under fixed orthodontic treatment.
Materials and Methods: In a double-blind randomized clinical trial, 84 patients under fix orthodontic treatment were selected. After receiving oral hygiene instruction, the patients were randomly assigned to four groups (group 1: Matrica, group 2: Persica, group 3: CHX 0.02%, group 4: normal saline). Dental plaque scores (PI), gingival inflammation (GI) and papillary bleeding (PBI) indices were measured at the beginning, 1 week after receiving oral hygiene instructions and 30 days after mouthwash consumption. The scores of the periodontal indices were statistically analyzed by Kruskal Wallis, ANOVA the paired Mann-whitney U test and Tukey test.
Results: All of the indices were significantly reduced in study groups (except for the control). Matrica and Persica mouthwashes were similarly effective in improving the periodontal parameters. Their efficacy in decreasing the PBI scores was significantly higher than CHX 0.2% (P<0.01).
Conclusion: Application of the two herbal mouthwashes was effective in improving the periodontal parameters in patients undergoing fixed orthodontic treatment.
Behrad Tanbakuchi, Abolghasem Bahador,
Volume 31, Issue 2 (9-2018)
Abstract
Background and Aims: The purpose of this study was to investigate the application of nanoparticles in orthodontics.
Materials and Methods: This study was conducted using a review method by searching Scopous, Google Scholar and Web of science. Key words (Nano silver, Nano ZnO, Nano Chitosan, Nano Curcumin and Nanoparticles) were used. These searches were limited to the English ariticles after the year 2010.
Conclusion: According to the published studies, silver nanoparticles, curcumin, titanium oxide, chitosan, zinc oxide, quaternary ammonium derivatives exhibit appropriate antibacterial properties. Further studies are recommended to investigate the effect of each of these nanoparticles on the bond strength. In order to reduce the decay, there is lack of evidences regarding the addition of ACP nanoparticles and nanoparticles of calcium- phosphate and fluoride. Therefore, further studies are recommended. Studies have shown that the addition of zinc oxide nanoparticles to orthodontic wires could reduce the friction between the wire and the bracket. While, adding titanium oxide nanoparticles to bracket increased the friction. Although, evidences in this regard are inadequate but it seems that nanoparticulates are less toxic than conventional materials.aa
Vahid Nemati, Reza Shrgi, Nastaran Mansoureiyeh,
Volume 35, Issue 0 (5-2022)
Abstract
Background and Aims: Malocclusion in orthodontics is one of the dental and jaw abnormalities that can cause psychosocial and social problems. Personality traits, body image, and self-concept are different in orthodontic applicants due to the different effects of malocclusions on appearance and psychological well-being. The aim of this study was to investigate the personality traits, body image, and self-concept in patients seeking orthodontic treatment in Tabriz-Iran in 1400.
Materials and Methods: The statistical population of the study included all patients requesting orthodontic treatment whom were referred to one of the orthodontic clinics in Tabriz during 1399-1400. This study was performed on 149 patients seeking orthodontic treatment (127 females and 22 males) by Convenience Sampling method. Neo personality traits, the Body Image Concern, and Marsh body self-concept questionnaires were used. SPSS software was used for data analysis.
Results: According to the results, neuroticism, agreement, conscience, extraversion and openness to experience were high in orthodontic patients (P<0.05). The average dissatisfaction with body image was high (P<0.05). Also, the body outside self-concept was low and the self-esteem was high (P<0.05).
Conclusion: Personality factors, body image, and self-concept are three effective psychological characteristics in patients seeking orthodontic treatment. Therefore, the request for orthodontic treatment is largely due to psychological factors such as differences in personality traits, body image, and self-concept.
Afsaneh Ghorbani, Sedigheh Sheikhzadeh, Homayoun Alaghehmand, Valiollah Arash, Seyyed Ali Seyyed Majidi,
Volume 37, Issue 0 (3-2024)
Abstract
Background and Aims: Ensuring the long-term stability of orthodontic treatments and preventing tooth relapse remains a significant challenge in orthodontics, often addressed through the extended use of retainers. Given the pivotal role of retainers' physical and mechanical properties in this regard, this study aimed to investigate the tensile strength, flexural strength, and deflection of three distinct types of fixed orthodontic retainers.
Materials and Methods: In this laboratory study, each group comprised 12 samples of twisted, flat, and coaxial retainer wires, each measuring 8 mm in length. These samples were affixed onto the polyethylene blocks using cyanoacrylate adhesive and subsequently subjected to compressive loads using a universal testing machine. The maximum bending strength and deflection rate were recorded from stress-strain diagrams. To evaluate the tensile strength, the identical samples underwent tensile loading. Statistical analysis was performed utilizing SPSS software, employing analysis of variance tests to compare data between groups.
Results: Significant differences were observed in the bending strength (P=0.004), deflection (P<0.001), and tensile strength (P<0.001) among the investigated retainer wires. The flat retainer wire exhibited the highest bending strength, averaging 822.876±136.07 MPa, while the coaxial retainer wire showed the lowest, with an average of 673.65±73.35 MPa. Regarding deflection, the flat retainer wire displayed the highest average at 4.04±0.6 mm, surpassing the other two types of retainers. However, the tensile strength of the twisted retainer wires, averaging 699.7±83.46 MPa, exceeded that of both the flat and coaxial retainer wires.
Conclusion: The flat retainer wires demonstrated the highest bending and deflection strength, while the twisted retainer wires exhibited the highest tensile strength. Overall, the bending strength, deflection, and tensile strength of the 3-strand twisted and flat retainer wires outperformed those of the 5-strand coaxial retainer wires, increased flexural and tensile strengths imply a higher resistance of the wires to the forces induced by harder and more viscous foodstuffs.
Amirhossein Mirhashemi, Yasaman Sanaee,
Volume 38, Issue 0 (4-2025)
Abstract
Background and Aims: Artificial intelligence (AI) has emerged as a transformative force in various fields, including orthodontics. AI has demonstrated encouraging results in enhancing diagnostic precision, treatment decision, and outcome prediction. With the accessibility of different AI software, its utilization in orthodontics has grown significantly. In this review study, we examined various applications of artificial intelligence within the field of orthodontics.
Materials and Methods: A comprehensive search was conducted in the PubMed database using the keywords; “Orthodontics” and “Artificial intelligence” between 2020 and 2025. 643 articles were found in the initial search. After eliminating articles based on the inclusion and exclusion criteria, 293 articles remained for full-text review, and finally 38 articles were included in our review to obtain a comprehensive review of the applications of artificial intelligence in orthodontics.
Results: Today, artificial intelligence has been used in different stages of orthodontic treatment, including diagnosis, decision making, outcome prediction and education. It has shown high accuracy in many areas, including cephalometric analysis and treatment planning. However, enhancements are necessary in certain aspects, particularly in space analysis and the prediction of treatment outcomes.
Conclusion: Conducting systematic reviews focusing on each of these applications can provide a better perspective for clinicians to use this technology in their everyday practice.
Mohammad Mehdi Alishahi, Hemmat Gholinia, Meisam Moradi,
Volume 39, Issue 0 (3-2026)
Abstract
Background and Aims: Despite the functional and aesthetic benefits, orthodontic treatment is often associated with pain and discomfort that can adversely affect patients’ quality of life. Given the growing emphasis on the patient-reported outcomes in clinical care, this study aimed to investigate the association between the pain intensity caused by orthodontic treatment and orthodontic-related quality of life in patients undergoing fixed orthodontic therapy.
Materials and Methods: This descriptive-analytical cross-sectional study was conducted in 2022 on patients receiving fixed orthodontic treatment with a metallic MBT system (slot 0.022 inch) at a private clinic in Babol, Iran. A total of 85 patients aged 15–25 years were selected using convenience sampling. Pain intensity was assessed using a visual analog scale (VAS) ranging from 0 to 10. Quality of life was evaluated using the persian version of the Orthodontic Quality of Life questionnaire, with a scoring range of 22 to 88. Data were analyzed using independent samples t-test and Pearson’s correlation coefficient in SPSS, with a significance level set at P<0.05.
Results: Among the participants, 72.9% were female, 68.2% were under the age of 20, and 31.8% were aged between 20 and 25 years. The mean pain score was 4.75 ± 1.91, and the mean Oral Health Related Quality of Life (OHRQoL) score was 37.95 ± 9.51. A significant negative correlation was found between the pain intensity and overall OHRQoL, as well as all of its subdomains (oral function, social impact, dentofacial aesthetics, and self-awareness of appearance) (P≤0.001). No statistically significant differences in pain or OHRQoL scores were observed based on gender or age group (P>0.05).
Conclusion: Orthodontic pain has a significant negative impact on patients’ quality of life. Early pain management strategies and supportive interventions during the initial phases of orthodontic treatment can enhance patients’ overall treatment experience and improve compliance.
