ali rafighi | Tabriz University Of Medical Sciences (original) (raw)

Papers by ali rafighi

permits unrestricted use, distribution, and reproduction in any medium, provided the original wor... more permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Background and aims. Class III malocclusions are considered complex and difficult orthodontic problems to diagnose and treat. The purpose of this study was to investigate the morphologic characteristics of the craniofacial complex of adults with Class III malocclusion in an Iranian population. Materials and methods. Lateral cephalometric radiographs of 50 patients with Class III malocclusion (20 males and 30 females; age range of 18-27 years) were selected on the basis of molar relationship, concave profile and an overjet of ≤ 0 mm. The standard values of 19 soft tissue measurements were determined using McNamara, Burstone and Viazis methods. Results. Adults with Class III malocclusion exhibited distinct craniofacial morphologic characteristics manifested by a com-bination of retrusion of maxilla and protrusion of mandible. Conclusion. The most prevalent component wa...

Dental implants are commonly used to replace congenitally missing lateral incisors in adolescent ... more Dental implants are commonly used to replace congenitally missing lateral incisors in adolescent orthodontic patients. However, these restorations are often challenging for the orthodontist, surgeon, and restorative dentist. In some patients the space across the alveolar crest is too narrow to permit the surgeon to place the implant. Occasionally the root apices of the adjacent central incisor and canine are in close proximity. In other cases the ridge thickness could be inadequate and require augmentation. Finally, questions commonly arise regarding the appropriate age for implant placement in these young patients. This presentation will use clinical examples to discuss these problems and provide guidelines for their solutions. Conclusion: Dental implants are a treatment of choice for most patients with congenitally missing laterals. An implant will preserve tooth structure and alveolar bone and provide esthetics and function. However, successful restorative treatment involving imp...

Background and aim: The aim of this study was to find out influence of the orthodontic devices on... more Background and aim: The aim of this study was to find out influence of the orthodontic devices on the oral epithelial cells. Materials and methods: Cells of lower lip oral mucosa from 32 orthodontic patients were collected by exfoliative cytology in three times: Day 0 (just before appliance placement), and 14 and 60 days after appliance insertion. Nuclear (NA) and cytoplasmic (CA) areas, NA/CA ratio, cell morphology, and cellularity of smears were analyzed by using cytologic and cytomorphometric methods. Results: The NA of the cells adjacent to orthodontic devices diminished after appliance placement, and reached to its lower level in day 60 (p = 0.000). Investigated epithelial cells showed insignificant changes in CA. Type II inflammatory smears, according to Papanicolau, increased insignificantly after the treatment initiation. Superficial epithelial cells, were predominant cell type in day 14 and 60 (p= 0.002).. Conclusion: Orthodontic appliances cause reduction in NA and induce ...

Esthetics in orthodontics has been defined mainly in terms of profile enhancement, but if you ask... more Esthetics in orthodontics has been defined mainly in terms of profile enhancement, but if you ask lay people what an orthodontist does, their answers will usually include something about creating beautiful smiles. It is important to differentiate between the social smile and the enjoyment smile. The social smile is a voluntary smile a person uses in social settings or when posing for a photograph. In treating the smile, the social smile generally represents a repeatable smile. In this presentation we have chosen the social smile and will discuss esthetic teeth and gingival relationships, the evolution of smile analysis, and will analyze the smile in 4 dimensions: frontal, oblique, sagittal, and time-specific. Conclusion: This article represented a reemphasis of the importance of physical diagnosis and the appreciation of the soft tissues that both drive our treatment planning and limit the treatment response. The key element in this evaluation was the direct measurement of lip–tooth...

Background: After completion of orthodontic treatment, the retention phase is necessary for premo... more Background: After completion of orthodontic treatment, the retention phase is necessary for premolar teeth to preserve them in an ideal esthetic and functional relationship and to counteract the inherent tendency of teeth to return to their previous positions. Different fixed and removable retainers are used to prevent relapse in the anterior segment of the dental arch. Retainers that are bonded to 6 anterior teeth, i.e. flexible spiral wires (FSW), are more commonly used. In addition, extended bonded retainers are used to keep the extraction space closed, which are bonded to premolars in addition to anterior teeth. In orthodontic treatments involving tooth extraction, the inability of retainers to prevent the re-opening of the extraction space will result in some periodontal and occlusion problems and patient dissatisfaction. Objectives: Therefore, the present study evaluated the ability of extended fixed retainers in comparison to FSW retainers, along with overnight use of removab...

Minerva stomatologica, 2020

BACKGROUND Orthodontic appliances (ligatures, braces, wires, etc.), are one of the main sources o... more BACKGROUND Orthodontic appliances (ligatures, braces, wires, etc.), are one of the main sources of trauma in the oral cavity. Friction between brackets and mucosa is a kind of chronic trauma that may cause buccal mucosal proliferation and ulceration and is one of the most common complaints of patients during orthodontic treatment. The aim of this study was to evaluate the changes of the lower lip epithelial cells after the removal of orthodontic fixed appliances. METHODS Cells of lower lip oral mucosa of 31 orthodontic patients were collected by exfoliative cytology in three times: immediately (T0), 30(T1) and 60 (T2) days after debonding. Nuclear (NA) and cytoplasmic (CA) areas, NA/CA ratio, cell morphology and cellularity of smears were evaluated using cytomorphometric and cytomorphologic methods. Friedman test followed by the Wilcoxon test was used to compare the NA, CA and NA/CA values in three different times. Cell morphology and cellularity were analyzed by the Chi-square test...

Effect of orthodontic fixed appliances on epithelial cells morphology of buccal mucosa during ort... more Effect of orthodontic fixed appliances on epithelial cells morphology of buccal mucosa during orthodontic treatment , Effect of orthodontic fixed appliances on epithelial cells morphology of buccal mucosa during orthod... , کتابخانه الکترونیک و دیجیتال - آذرسا

Introduction: Achieving proper bond strength is an important objective in orthodontics, since bra... more Introduction: Achieving proper bond strength is an important objective in orthodontics, since bracket replacement is a costly and time consuming procedure. Bond failures depend on multiple factors such as etching process, primer application approach and masticatory forces. The aim of this study was to evaluate the effect of elapsed time between primer application and bracket transfer on the shear bond strength of the brackets bonded with no-mix composite. Materials & methods: One hundred intact bovine incisors were randomly divided into 4 groups (n=25). Brackets were bonded immediately after primer application in the first group and 5, 15, 30 minutes after primer application in the second, third, and fourth groups, respectively. A universal testing machine was used for debonding and measuring shear bond strength, and the failure sites were inspected under a stereomicroscope. One way ANOVA plus Tukey tests and Chi-square test were used to evaluate shear bond strength and adhesive remnant index(ARI), respectively. Results: Differences in shear bond strength among four groups were significant (p=0.001). The differences in shear bond strength between the first and second groups (p=0.011) and between the second and fourth groups (p=0.002) were significant with greater bond strength mean value for the second group. ARI evaluation showed significant differences among groups (p=0.032). Conclusions: It could be recommend not to delay bracket positioning more than 5 minutes after primer application, in order to avoid negative effects of elapsing time on the primer properties.

The Journal of Contemporary Dental Practice, 2018

Aim: Retention is one of the stages of orthodontic treatment, which is an attempt to retain teeth... more Aim: Retention is one of the stages of orthodontic treatment, which is an attempt to retain teeth in their corrected positions after active treatment with the use of fixed orthodontic appliances. The aim of the present study was to compare the stability of the results of orthodontic treatment and the gingival health between Hawley retainer (HR) and vacuum-formed retainer (VFR) with two different thicknesses. Materials and methods: In this randomized clinical trial, 66 patients undergoing comprehensive orthodontic treatment in a private office were evaluated after completion of treatment. The subjects were randomly assigned to three groups. At the end of orthodontic treatment, the subjects in all the groups received a fixed bonded retainer in the mandible; in the maxilla, group I received an HR, group II received a VFR with a thickness of 1.5 mm, and group III received a VFR with a thickness of 1 mm. The American Board of Orthodontics objective grading system (ABO-OGS) index was used at the end of treatment (before the delivery of the retainers) and 6 months after the use of retainers to evaluate the stability of the results of orthodontic treatment. Gingival index (GI) was used at the two above-mentioned intervals to evaluate gingival health. The ABO-OGS measurements were carried out on dental casts by a clinician who was blinded to the types of retainers the patients wore. Data were analyzed with Statistical Package for the Social Sciences (SPSS) version 20, using proper statistical analyses. Results: Six months after the delivery of retainers, ABO-OGS and GI scores with the 1.5 mm VFR were higher than those in the two other groups, with no significant differences between the three groups. There were no significant differences between the ABO-OGS scores before the delivery of retainers and 6 months after the use of retainers in any of the study groups. In the HR

Journal of Dental Research, Dental Clinics, Dental Prospects, 2019

Background. The aim of this longitudinal observational study was to evaluate patients’ perception... more Background. The aim of this longitudinal observational study was to evaluate patients’ perceptions of alignment changes during the first stage of fixed orthodontic treatment. Methods. Ninety-three non-extraction patients (mean age: 17.6 years) who were scheduled to undergo fixed-appliance treatment in the first author's private office were included. Patients assessed the alignment of their teeth subjectively using visual analogue scale at the bonding session and four, eight and 12 weeks later. The amount of Little's irregularity index at each session was calculated on stone casts. Freidman test was used to compare the "alignment changes" between different intervals. Correlation coefficients were calculated using Spearman test between Little’s irregularity indices and alignment scores reported by the patients in each session. Results. No patients reported regression in alignment changes during three-month course of treatment. The final changes (from bonding session ...

Advances in Bioscience and Clinical Medicine, 2017

Background: Maintaining the results of orthodontic treatment and keeping the teeth in the correct... more Background: Maintaining the results of orthodontic treatment and keeping the teeth in the corrected position is a great challenge in orthodontics. This study aimed to compare the survival time of three types of retainers including Hawley, 1-mm Vacuum-Formed (VF), and 1.5-mm VF within 6-month period. Methods: In this randomized clinical study, 152 patients were allocated into three groups to receive one type of the retainers. They were visited 1, 3, and 6 months after retainer delivery and checked for breakage, loss, local perforation, and discoloration from the…

Journal of clinical and diagnostic research : JCDR, 2017

The use of mini-implants has increased in recent years because of their role in absolute anchorag... more The use of mini-implants has increased in recent years because of their role in absolute anchorage, but the placement sites may affect the success or failure of the procedure, so it is very important to determine the appropriate and safe location for orthodontic mini-implants. On the other hand, the Cone Beam Computed Tomography (CBCT), which offers clear 3-Dimentional (3D) images, has been widely used in orthodontics and implant dentistry for surgical guidance of mini-implant placement. The aim of this retrospective study was to evaluate inter-radicular spaces between mandibular canines to second molars using cone beam 3D images. In this retrospective cross-sectional descriptive study, maxillofacial CBCT scan data were obtained from 40 adults. The 3D images were evaluated in five axial sections at 2, 4, 6, 8 and 10 mm from the cementoenamel Junction (CEJ). To determine inter-radicular spaces, tangent lines were drawn buccolingually to the roots in axial section and the minimum dist...

Iranian Journal of Orthodontics, 2016

Iranian Journal of Orthodontics, Jul 15, 2013

Iranian Journal of Orthodontics, Oct 15, 2012

12 Th International Congress of Iranian Academy of Restorative Dentistry 24 26 October 2012 Tabriz Iran, Oct 23, 2012