Showing 6 results for Canine
J. Mahmodian , A. Kowsary , Sh. Javadi-Nejad ,
Volume 11, Issue 4 (8-1998)
Abstract
Eruption is a kind of development move of tooth from the place of its formation to its functional position in the mouth.Time and sequence of permanent's teeth eruption from the point of health diagnosis and orthodontic treatments is very important.Because of this, we decided to evaluate and determine the mean eruption time of canine and premolars from gum penetrations toward occlusion and also their sequence of eruption.The average time of eruptions in this study was higher than other similar studies.Our findings showed that the mean eruption time of canine and premolars in girls is earlier than boys lower canines erupt earlier than upper ones and maxillary premolars erupt before mandibular premolars in boys.
H. Razmi , D. Sharifi , F. Sasani , M. Eghdami ,
Volume 14, Issue 3 (9-2001)
Abstract
The cleaning and shaping of root canals is one of the most important proccesses in endodontics. In many cases, the physiologic or pathologic proccedures can affect the canals. So, using the instruments and materials, which could be applied in cleaning and shaping of narrow canals is necessary. The aim of this study was the evaluation of Iranian and foreign chelating agents on periradicular tissue of cats. After cleaning and shaping of canals in 18 lower canines of cats, the original RC-Prep and an Iranian chelating agents were placed equally in two groups with 9 teeth in each one. The patency of canals preserved for materials leakage. In 3 lower canines of cats, phosphoric acid was placed as positive controls.3 canine teeth as negative controls had nothing in them. The crowns were sealed and the cats were sacrificed in 1/21/42 days periods after conducting vital perfussions. The teeth samples with their surrounding osseous tissues were gathered and placed in three groups each contained 6 samples. Histologic preparations were done and the tissue reactions to these materials were evaluated by counting the proliferative inflammatory cells. Also the morphometric analysis for these samples was done. The inflammatory reactions of these materials (the original RC-Prep. & the Iranian chelating agent) were not statistically different. Both of these materials were different in inducing tissue reactions in comparison with those of positive and negative controls, and these differences were statistically important.
V. Talebi , H. Mahmood Hashemi , H. Gahani Hashemi ,
Volume 16, Issue 2 (5-2003)
Abstract
Statement of Problem: One of the easiest and most practical methods to predict the size of permanent canines and premolars, is of Tanaka-Johnston, but their research has been only performed on white skin North Europeans and it should be noted that the size of teeth, in various races, differ from each other.
Purpose: The aim of this study was to determine the validity of Tanaka-Johnston method, in a sample population taken from Ghazvin city.
Materials and Methods: The numbers of 235 pairs of study casts, prepared before any kind of treatment, were selected. The size of lower permanent incisors and permanent canines and premolars of both arches were measured. To analyze the results, "regression analysis" and "t test" were used.
Results: Based on the findings obtained from this study, new prediction equations as Y=12.9+0.4(X) and Y=]0.6+0.5(X) were presented for maxilla and mandible, respectively. However, these equations did not differ from Tanaka-Johnston equations statistically.
Conclusion: Tanaka- Johnston equations can be acceptably applied for the sample population taken from Ghazvin city, if the predictions are not overestimated.
H. Pakshir , A. Zare Emani , B. rahsepar ,
Volume 17, Issue 4 (1-2005)
Abstract
Statement of Problem: Reduction of orthodontic therapy treatment time is considered an important goal in the management of malocclusion in adult patients. Corticotomy- facilitated orthodontic treatment may be considered an intermediate therapy between orthognatic surgry and conventional orthodontics for reducing treatment time.
Purpose: This study was undertaken to evaluate and compare the rate of tooth movement of upper canine following corticotomy with conventional method.
Materials and Methods: Ten young adult patients, 17-25 years old was selected through sequential sampling procedure in orthodontics department of Shiraz Dental School. The patients exhibited different orthodontic problems and needed extraction of premolars. Following extraction of premolars and initial phase of orthodontic treatment, corticotomy were performed unilaterally on buccual and palatal sides of extraction area as described by Takami. The other imoperated sides were used as control. After subsiding the resultant inflammation, the activated NiTi spring was used and measurement of the amount of tooth movement were assessed by using Rugae as reference point. The panoramic radiographs were super imposed for evaluation of canines tipping. For analyzing the results, Kolmogorou- simirnov and t.tcst were used.
Results: The rate of canine tooth movement was much greater in the corticotomy sides than the unoperated (control) side (P=0.015). This was especially significant at the end of first week of tooth movement (P=0.000). Comparing the two sides, the amount of canine tipping was much lesser in corticotomy group than the control group (P=0.046). There was no significant difference concerning the anchorage loss between the two groups (P=0.410).
Conclusion: Corticotomy procedure had a positive effect on the rate of tooth movement with less tipping of the canines comparing to conventional orthodontic treatment. To get more benefit from this procedure, it is recommended to select those patients who do not need canine alignment after premolars extraction, such as bimaxillary dento alveolar protrusions.
Mh. Hosseini, A. Kamali, M Mahmoodzadeh Darbandi,
Volume 23, Issue 1 (6-2010)
Abstract
Background and Aims: Lasers with different characteristics have been used to stimulate orthodontic tooth movements and to inhibit the pain during tooth movements. Considering the contradictory finding in this respect, the effect of low level laser therapy (LLLT) was evaluated on the pain during orthodontic tooth movement.
Materials and Methods: In this randomized clinical trial study, 12 patients were included with extracted upper first premolars and required canine retraction into extraction site. While in both sides canines were retracted by Niti coil spring, one side was exposed to GaAlAs laser (890nm). LLLT was done on the buccal and palatal mucosa by slow movement of probe. The patients were asked about their pain on both sides 2 days after beginning of retraction. Pain measurement was evaluated with VAS.
Results: Pain perception in LLLT side significantly decreased (P=0.007).
Conclusion: Based on the results, single irradiation of GaAlAs laser (12J energy per tooth) can decrease pain perception.
Seyed Hadi Hosseini, Fatemeh Ghobadi, Vahid Rezaii, Donya Maleki,
Volume 34, Issue 0 (5-2021)
Abstract
Background and Aims: Knowing the depth and type of the teeth impaction with radiographic approaches can guide the clinicians into selecting the most appropriate treatment and prevent surgical complications. Therefore, the purpose of this article was to evaluate the prevalence of canine and premolar impaction in the digital panoramic view of patients referred to Rasht dental school in 2019.
Materials and Methods: This annalistic-descriptive cross-sectional study comprised patients who attended the Faculty of Dentistry, Rasht, Iran in 2019. Dental records and panoramic radiographs of 500 patients were reviewed retrospectively. Demographic information as well as the type and depth of impaction, involved jaw, and also, the associated pathological lesions were recorded. Data were analyzed with SPSS24 version with significant level of P<0.05.
Results: The findings revealed that among 500 individuals (300 (60%) were females and 200 (40%) were males), 35 individuals (7%) had at least one impacted tooth, 80% of impacted teeth were canines and the others were premolars. The most common impaction type, impaction level, and pathological lesion were mesioangular, B, and carries of the adjacent tooth, respectively. A significant relation was not observed between the type and level of impaction with the involved jaw (P=0.15, P=0.99) and also, the relation between the type of pathological lesion and gender was insignificant (P=0.85).
Conclusion: Functional and esthetic complications of impacted tooth can be prevented or declined by on-time radiographic screening.
