Iranian Journal of Orthodontics最新文献_第3页

Comparison of the Mandibular Foramen Position Among Different Skeletal Classes Using Panoramic Radiographs 不同骨骼类型的下颌孔位置的全景x线片比较

Iranian Journal of Orthodontics Pub Date : 2019-01-23 DOI: 10.5812/IJO.65691

Z. Kajan, A. Sigaroudi, Negar Khosravifard, Nahid Farsam

{"title":"Comparison of the Mandibular Foramen Position Among Different Skeletal Classes Using Panoramic Radiographs","authors":"Z. Kajan, A. Sigaroudi, Negar Khosravifard, Nahid Farsam","doi":"10.5812/IJO.65691","DOIUrl":"https://doi.org/10.5812/IJO.65691","url":null,"abstract":"Background: The mandibular foramen has often been considered as the most reliable reference point for several anesthetic and surgical procedures in the maxillofacial region. This study evaluated the position of the mandibular foramen in diﬀerent skeletal classes. Methods: A total of 90 panoramic and lateral cephalometric images belonging to class I (n = 30), class II (n = 30), and class III (n = 30) patients were used for this study. The position of the mandibular foramen in relation to the anterior and posterior borders of the mandibular ramus, inferior border of the mandible, sigmoid notch and occlusal plane was determined in each panoramic radiograph. Results: Thepositionof themandibularforamenrelativetotheocclusalplaneandthesigmoidnotchsigniﬁcantlydiﬀeredamong the three skeletal groups; however, no signiﬁcant diﬀerence existed among the skeletal classes with regard to the position of the mandibular foramen in relation to the anterior and posterior borders of the ramus and the inferior border of the mandible. Conclusions: The position of the mandibular foramen tends to be lower in skeletal class II patients; therefore, it seems that lower injection heights in these patients could result in better outcomes.","PeriodicalId":320129,"journal":{"name":"Iranian Journal of Orthodontics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124874221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cephalometric Norms in an Iranian Kurdish Population According to the Steiner Analysis 根据斯坦纳分析，伊朗库尔德人的头颅测量标准

Iranian Journal of Orthodontics Pub Date : 2019-01-20 DOI: 10.5812/IJO.63439

M. Imani, Saman Farzaneh, A. Ghanbari, Sepideh Arab

{"title":"Cephalometric Norms in an Iranian Kurdish Population According to the Steiner Analysis","authors":"M. Imani, Saman Farzaneh, A. Ghanbari, Sepideh Arab","doi":"10.5812/IJO.63439","DOIUrl":"https://doi.org/10.5812/IJO.63439","url":null,"abstract":"Background: Cephalometric analyses norms and orthodontic software have been mainly developed for Caucasians. Thus, they might not be true for other ethnical groups. Objectives: This study sought to determine cephalometric norms of an Iranian Kurdish population according to Steiner analysis. Methods: In this cross-sectional study, 100 lateral cephalograms of adult orthodontic patients between 18 - 30 years including 40 malesand60femaleswithnormalocclusionandsymmetricalfaceswereevaluated. Lateralcephalogramsweretracedandanalyzed based on Steiner’s cephalometric parameters. Data were analyzed using SPSS. Diﬀerences between Kurdish and Caucasian norms were analyzed using one-sample t -test. Independent t -test was used to compare males and females (P < 0.05). Results: TheSNA,SNB,ANB,SND(Sella-Nasion-Dpoint),interincisalangle,GoGn-SNL1-NB(bothangularandlinearmeasurements), SL(distancefromSellapointtoL,whichistheprojectionof themost-anteriorpointinthebodyof mandibleorpogoniononSNand SE (distance from Sella point to E point, which is the intersection of a line drawn from the most distal limit of the posterior surface of condyle head and SN) values were signiﬁcantly diﬀerent between the Kurdish population and Caucasian norms (P < 0.05). No signiﬁcant diﬀerences existed in Occl-SN (occlusal plane to SN) and U1-NA (both angular and linear measurements) between the KurdishpopulationandtheCaucasians(P> 0.05). Kurdishmalesandfemalesweresigniﬁcantlydiﬀerentintermsof SND,Occl-SN, GoGn-SN and U1-NA angles, U1-NA distance and SL and SE values (P < 0.05). No signiﬁcant diﬀerence existed between Kurdish males and females in SNA, SNB, ANB, interincisal angle and L1-NB (P > 0.05). Conclusions: CephalometricnormsforKurdishadultsarediﬀerentfromthoseof Caucasians. Thenormsobtainedinourstudycan be used for orthodontic treatments and orthognathic surgeries in Kurdish population.","PeriodicalId":320129,"journal":{"name":"Iranian Journal of Orthodontics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128916821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

The Cytotoxic Effect of Titanium Oxide Surface Modified Orthodontic Stainless Steel Wires 氧化钛表面改性正畸不锈钢丝的细胞毒性作用

Iranian Journal of Orthodontics Pub Date : 2019-01-19 DOI: 10.5812/ijo.66957

S. Laxmikanth, S. Malik, C. Ramachandra, Sushruth Shetty, A. Shetty, Ashok Kumar, Ronnie Joseph

{"title":"The Cytotoxic Effect of Titanium Oxide Surface Modified Orthodontic Stainless Steel Wires","authors":"S. Laxmikanth, S. Malik, C. Ramachandra, Sushruth Shetty, A. Shetty, Ashok Kumar, Ronnie Joseph","doi":"10.5812/ijo.66957","DOIUrl":"https://doi.org/10.5812/ijo.66957","url":null,"abstract":"Background: The fixed orthodontic mechano therapy has been associated with white spot lesions and plaque accumulation. Titanium oxide (TiO2) is a compound that possesses clinically significant anti-microbial action especially against lactobacillus and streptococci. However the safety of the TiO2 coated wires has still not been tested. In this study, we evaluated the cytotoxic effects of TiO2 coated stainless steel orthodontic wires. To assess the same, we used A549 cells as experimental cell line. Cells were categorized into 4 groups (n=6/group): cellular control group, represented by the cell growth; negative control group (stainless steel wire) positive control group (hydrogen peroxide), experimental group (titanium oxide coated stainless steel wires). The cultures were carried out either on 6 well plates or 96 well plates and pictures were captured using a microscope or assessed by MTT assay. \u0000Results: MTT assay revealed no cytotoxic effect by TiO2 coated wires as compared to control. Similarly, structural assessment of cellular morphology and nuclear membrane structure further showed no change in toxic effects of TiO2 coated SS wires on the cells. \u0000Conclusion: Despite the limitations of this study, we demonstrated that titanium oxide coated wires had no cytotoxic effects like uncoated stainless steel wires and that there is a strong demand for long-term studies of TiO2 coated wires and brackets, with a strong focus on the cytotoxic properties, concentrations and exposure times, to make the desired applications for TiO2 coated wires safe and suitable for orthodontic use.","PeriodicalId":320129,"journal":{"name":"Iranian Journal of Orthodontics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126866028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparison of the Application of Different Fluoride Supplements on Enamel Demineralization Adjacent to Orthodontic Brackets: An In Vitro Study 不同氟化物补剂在正畸托槽牙釉质脱矿中的应用比较

Iranian Journal of Orthodontics Pub Date : 2019-01-19 DOI: 10.5812/IJO.64157

A. Shayan, M. Rassouli, S. Kimyai, H. Valizadeh, M. Atashi, S. Rikhtegaran

{"title":"Comparison of the Application of Different Fluoride Supplements on Enamel Demineralization Adjacent to Orthodontic Brackets: An In Vitro Study","authors":"A. Shayan, M. Rassouli, S. Kimyai, H. Valizadeh, M. Atashi, S. Rikhtegaran","doi":"10.5812/IJO.64157","DOIUrl":"https://doi.org/10.5812/IJO.64157","url":null,"abstract":"Background: White spot lesion is considered as one of the main problems in the orthodontic treatment. Brackets used in ﬁxed orthodontic treatment create an environment that provides enamel demineralization. Objectives: Theobjectiveof thecurrentstudywastoperformaninvitrostudytocomparediﬀerentapplicationsof ﬂuoridesupple-mentsonenameldemineralizationadjacenttoorthodonticbracketsandﬁnallytounderstandthebestsupplementtorecommend the patients. Methods: One hundred and twenty extracted caries-free human premolar teeth were randomly assigned into six groups: group 1: Controlgroup,group2: Fluoridetoothpaste,group3: Fluoridetoothpaste/mouthrinse,group4: Fluoridetoothpaste/vanish,group 5: Fluoridetoothpaste/gelandgroup6: Fluoridetoothpaste/foam. Afterbondingthebracketstotheteeth,theﬂuoridesupplements were applied based on each group above, except the control group. Then all the specimens were cycled for 30 days in demineralization solution for 8 hours a day, rinsed, placed in artiﬁcial saliva for 4 hours a day, brushed (except the control group), and put back to artiﬁcial saliva for 12 hours. DIAGNOdent laser ﬂuorescence was used to quantify the demineralization changes. Results: Signiﬁcantdiﬀerencesexistedbetweenallﬂuoride-containinggroupsandcontrolgroup. Analysesof theresultsshoweda signiﬁcantdiﬀerencebetweencontrolgroupandtherest5treatmentgroups(P< 0.001). Othersigniﬁcantdiﬀerenceswerebetween groups 2/5, 3/5, 2/4 and 5/6 (P < 0.05). There was no signiﬁcant diﬀerence among the other groups (P > 0.05). Conclusions: Accordingtotheresults,allﬂuoridesupplementscouldbeusedduringorthodontictreatmenttodecreasetheenamel demineralization. It has been illustrated that ﬂuoride-containing toothpaste and mouth rinse is better than no ﬂuoride treatment but is not eﬀective as well as ﬂuoride gel and varnish.","PeriodicalId":320129,"journal":{"name":"Iranian Journal of Orthodontics","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124690310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recovery of Clinical Periodontal Parameters After Orthodontic Appliance Removal: A Prospective Study 正畸矫治器移除后临床牙周参数的恢复:一项前瞻性研究

Iranian Journal of Orthodontics Pub Date : 2019-01-07 DOI: 10.5812/IJO.55047

S. Soheilifar, Sanaz Soheilfar, B. Javanshir, Milad Malekshoar, Z. Mohamadi

引用次数: 1

Comparison of Ricketts, Pancherz and Centrographic Superimposition Methods in Post-Treatment Assessment of the Effects of Twin Block-Appliance Therapy 双块矫治器治疗后疗效评价的Ricketts, Pancherz和centrlographic迭加法比较

Iranian Journal of Orthodontics Pub Date : 2019-01-01 DOI: 10.5812/IJO.12512

Rency Annie Abraham, S. Sundareswaran

引用次数: 2

Anterior Teeth Splint with Various Degrees of Alveolar Bone Loss; A 3D Finite Element Study 不同程度牙槽骨丢失的前牙夹板三维有限元研究

Iranian Journal of Orthodontics Pub Date : 2018-12-18 DOI: 10.5812/IJO.7981

P. Pedram, Hannaneh Ghadirian, Sepideh Arab