24 research outputs found

    Impacted maxillary canines and their relationship with lateral incisor resorption: a cone beam computed tomography (CBCT) study

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    Objective: The spatial position of a canine can affect the level of proximal root resorption and the success of orthodontic treatment. The aim of this study was to examine the mesiodistal and vertical position of impacted maxillary canines and to assess their relationship with the lateral incisor by using cone beam computed tomography (CBCT). Material and method: One hundred and sixty-nine CBCT scans of patients presenting with maxillary impacted canines were included in the study. The buccopalatal, mesiodistal (classified as sectors I, II, III, IV from distal to mesial) and vertical (cervical, middle, apical) position of the maxillary impacted canines were determined. The positional effect on the morphology (width, length, and depth) and resorption was assessed on the roots of the maxillary lateral incisors. Obtained data were statistically analysed by using Student t-test, the Mann Whitney U and Chi-Square tests. Results: Of the maxillary impacted canines, the 34.72% that had associated resorption on the adjacent lateral incisors were buccally positioned, and 65.28% were palatally positioned. While 45.58% of sector I impacted maxillary canines were buccally positioned, 68.31% of sector IV impacted maxillary canines were palatally positioned. Furthermore, there was a statistical significance between the mesiodistal position and palatal or buccal maxillary canine impaction (p < 0.05). In addition, the vertical position of the impacted maxillary canines was also related to their mesiodistal and buccopalatal positions (p < 0.05). Conclusion: While all maxillary impacted canines had the potential to cause lateral incisor resorption, there was no close relationship related to the canine’s buccopalatal, mesiodistal and vertical position. Nevertheless, if an impacted maxillary canine migrated towards the midline, the buccopalatal and vertical position of the tooth changed from buccal to palatal and cervical to apical, respectivel

    Radyoopak ve radyolusent görüntü veren lezyonların konik ışınlıbilgisayarlı tomografi ile retrospektif olarak incelenmesi

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    Amaç: Bu çalışmanın amacı; radyoopak ve radyolüsent görüntü veren lezyonların Konik Işınlı Bilgisayarlı Tomografi (KIBT) ile elde edilen görüntüler üzerinde bu lezyonların karakteristik radyografik özelliklerinden yararlanarak lokalizasyonlarını, hangi yaş ve cinsiyet aralığında daha sık görüldüğünü belirlemektir. Gereç ve Yöntemler: Zonguldak Bülent Ecevit Üniversitesi Diş Hekimliği Fakültesi’ne 2016-2018 yılları arasında teşhis ve tedavi amacıyla başvuran 1000 hastanın retrospektif olarak KIBT görüntüleri incelenmiştir. Çalışmamızda lezyonların histopatolojik tetkikleri kullanılmamış olup lezyonların karakteristik radyografik görüntüleri göz önünde bulundurulmuştur. Lezyonlar lokalizasyon, yaş ve cinsiyet olarak sınıflandırılmıştır. Bulgular: Radyoopak veya radyolüsent lezyon varlığı tanısı konmuş 1000 hastanın 89’u (% 48.4) kadın olup, 95’inin (% 51.6) erkek olduğu saptanmıştır. Radiküler ve dentigeröz kistler sırasıyla en çok gözlenen radyolüsent lezyonlar olmuştur. Çalışmamızda en çok rastladığımız tümöral oluşum odontomalardır. Sonuç: Radyoopak ve radyolüsent lezyonlar kist, tümör, kemiklerdeki displazik değişimler ve metabolik hastalıklar sonucu oluşabilir ve bu lezyonlar hastada estetik, fonksiyon ve fonasyon açısından sorunlara neden olabilmektedir. Rutin muayene esnasında alınan radyografilerde tesadüfi olarak kemik patolojileri tespit edilebilir ancak bazen de panoramik radyografilerde görülen distorsiyon, magnifikasyon ve süperpozisyon gibi durumlardan dolayı lezyonlar gözden kaçabilir ve tam anlamıyla teşhis edilemeyebilir. Bu nedenle KIBT gibi üç boyutlu görüntüleme teknikleri diş hekimlerine teşhis için daha güçlü bir olanak sağlamaktadır. Teşhisin daha hızlı ve kesin bir şekilde konması ile tedavinin de eş zamanlı bir şekilde daha kolay ve erken yapılması sağlanmış olmaktadır

    Comparison of CBCT with different voxel sizes and intraoral scanner for detection of periodontal defects: an in vitro study

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    Objectives: This study aimed to compare the diagnostic accuracy of cone beam CT (CBCT) units with different voxel sizes with the digital intraoral scanning technique in terms of the detection of periodontal defects. Methods and materials: The study material comprised of 12 dry skulls with maxilla and mandible. Artificial defects were created on teeth separately using burs randomly on dry skulls. In total 46 dehiscences, 10 fenestrations, 17 furcations, 12 wall defects and 13 without periodontal defect were used in the study. Each tooth with and without defects was imaged at various vertical angles using each of the following modalities: a Veraviewepocs 3D R100 CBCT device and a 3D Shape TRIOSㄾ Color P13 Shade Intraoral Scanner. Results: The κ values for interobserver agreement between observers ranged between 0.29 and 0.86 for the CBCT 10 × 8 cm field of view (FOV) with 0,160 mm3 voxel size; 0.35 and 1 for the CBCT 8 × 8 cm FOV with 0,125 mm3 voxel size; and 0.30 and 1 of intraoral scans. The κ values for detecting defects on anterior teeth were the least, following premolar and molar teeth both CBCT and intraoral scanning. Conclusions: Smaller voxel sizes and smaller CBCT FOV has the highest sensitivity and diagnostic accuracy for detecting various periodontal defects among the scanner modalities examined. Advances in knowledge: Adequate evaluation of the condition of the alveolar bone and periodontal tissues is important for the diagnosis, treatment, and prognosis of periodontal disease. Limited examination methods, such as palpation, inspection, and periodontal probe examination, may provide insufficient information for the diagnosis of periodontal diseases

    Evaluation of the visibility of the materials used in furcation perforation in imaging devices

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    Background: Variable radiographic techniques are used for postoperative evaluation of the materials used in furcation perforation. Since it is easily accessible clinically and the radiation dose which the patient is exposed to, is lower than the advanced imaging methods, intraoral imaging is applied. In cases that cannot be determined by 2D radiographs, cone beam computed tomography is more relevant because of the absence of superimpositions and allowing for multiplanar imaging. The aim of this study was to assess the diagnostic acceptability of the radiographic visibility of the materials used in furcation perforations and to find out which radiographic technique was efficient to view the materials. Methods: One hundred and twelve lower molar teeth were used according to the study criteria. Biodentin, BioAggregate, MTA and Endosequence were applied individually to the teeth, in order to repair the perforation zone. Periapical radiographs were obtained with Soredex Digora Optime with photostimulated phosphor plates. Other radiographic images were obtained using Planmeca Dixi 3 CCD, while CBCT images were obtained using Morita Veraviewepocs 3D R100. An endodontist and two dentomaxillofacial radiology specialists evaluated the images of CBCT and periapical radiographs. Teeth were evaluated randomly for the visibility of the repair materials in furcal perforations and scored. Results: MTA and Biodentine presented low image clarity while Bioaggregate and Endosequence had high image clarity. Morita Veraviewepocs 3D R100 depicted the highest sharpness, but no difference was observed between Soredex Digora Optime and Planmeca Dixi 3 devices. Conclusion: In the postoperative follow-up of the materials used in the treatment of furcation perforations, the usage of CBCT and the use of Bioagregate and Endosequence, which provide the best image clarity, has been suggested

    Relationship between pterygomaxillary fissure morphology and maxillary/mandibular position

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    Purpose The aim of this study was to investigate the possible correlation between maxillary and mandibular positioning via cephalometric analysis with pterygomaxillary fissure (PMF) morphology using cone beam computed tomography (CBCT). Methods In this study, CBCT images from 825 individuals (448 female, 377 male; age range was 18-91 years with this cohort) were analyzed; PMF length and width were measured. Three-dimensional cephalometric analysis was also performed using cephalometric analysis software. The landmarks and measurements in relation to maxillary and mandibular positions were identified and performed for the cephalometric analysis. Analysis of variance (ANOVA) was used for comparison of the parameters, while the Bonferroni test was used for multiple comparisons. Pearson’s test was also used to assess the correlations between the parameters. Results The results showed that males had significantly larger PMF length (p< 0.001) and width (p< 0.001) compared to females. The mean PMF length was 17.7mm (standard deviation [SD] 3.2mm) for right and 17.7mm (SD 3.3mm) for left but were not significantly different (p> 0.05). In terms of the cephalometric measurements, a significant correlation was found between upper central incisor (U1toAperp2D) and posterior facial height (PostFaceHtSGo2D) and PMF length, while correlations were found between PMF width and several cephalometric parameters such as lower lip (LwLiptoEPln2D and LwLiptoHLine2D) and occlusal plane (OPtoFHAng2D) (p< 0.05). Conclusion A significant relationship was observed between PMF morphology and the position of the maxilla or mandible. PMF lengths and widths were larger in males than females. Posteroanterior maxillary and mandibular lengths and posterior facial height are associated with PMF length and width

    Non-syndromic oligodontia: A case report

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    Diş agenezisi insanlarda en sık görülen doğumsal anomalilerden biridir ve hipodonti, oligodonti, anodonti şeklinde sınıflandırılır. Oligodonti; molarlar hariç, altı ya da daha çok sayıda dişin eksikliğidir. Oligodonti sendroma bağlı olmayan izole şekilde ortaya çıkabileceği gibi bir sendroma bağlı olarak da görülebilmektedir. Bu vaka raporunda genetik konsültasyon sonucu sendroma bağlı olmayan oligodonti tanısı koyulmuş olan16 daimi diş eksikliği olan 16 yaşındaki erkek hastanın klasik hareketli bölümlü protez ile tedavisi sunulmaktadır. Bu gibi hastaların protetik rehabilitasyonu ve uzun dönem klinik takipleri estetik, fonksiyon ve fonasyon ile ilgili problemlerin giderilmesi açısından önemlidir

    Mandibulada intraosseöz transmigre daimi kanin: Vaka serisi (8 vaka)

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    Dental transmigrasyon, sürmemiş dişlerin orta hattın karşı tarafına intraosseöz göçüdür. Etiyolojisi tam olarak bilinmemektedir. Genellikle asemptomatik olmakla beraber patoloji bulundurma ihtimali nedeniyle erken dönemde teşhis edilmesi tedavi planlaması için önem taşımaktadır. Kanin transmigrasyonu mandibulada maksillaya göre daha sık görülmektedir. Bu vaka serisinde 8 mandibular transmigre kanin vakası sunulmuştur

    Jaw Cysts: A Retrospective Study in a Turkish Subpopulation

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    Objectives: Cysts seen in the jaws may be odontogenic or non-odontogenic, depending on the tissue of origin. Although there are different methods to diagnose these lesions, histopathological examination of tissue biopsy of the lesion is accepted as the 'gold standard' in cases where the diagnosis is insufficient. Although there are different methods to diagnose these lesions, histopathological examination of tissue biopsy of the lesion is accepted as the 'gold standard' in cases where the diagnosis is insufficient. Materials and Methods: Pathology results of 436 patients who applied to Zonguldak Bülent Ecevit University Faculty of Dentistry, Oral and Maxillofacial Radiology Clinic between 2016-2021 for any reason and underwent biopsy were retrospectively scanned using digital archives. While classifying the cyst, the criteria published by the World Health Organization (WHO) in 2017 were taken into account. Obtained results were recorded for statistical analysis. SPSS 22.0 Software Package Program (SPSS 22.0 Software Package Program, Inc. Chicago, IL, USA) was used as statistical software in the study. Results: Of the 436 patients included in the study, 250 (57.3%) were male and 186 (42.7%) were female. The ages of the patients ranged between 7 and 82 years, and the mean age of the patients was 35.5±15.8. As a result of the findings, it was determined that the most common cysts were radicular cysts (53.7%). Radicular cysts were most commonly located in the posterior mandible and anterior maxilla anatomically. Conclusions: In addition to clinical and radiological examination, histopathological examination of biopsy samples taken from tissues is of great importance in the correct diagnosis and treatment planning of jaw cysts

    Retrospective Evaluation of Maxillofacial Fractures With Cone-Beam Computed Tomography

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    ÖZ Amaç: Bu çalışmanın amacı maksillofasiyal bölgede meydana gelen fraktürlerin yaş ve cinsiyete göre dağılımlarını, lokalizasyonlarını, sayısını, deplasman varlığını, radyolojik özelliklerini Konik Işınlı Bilgisayarlı Tomografi (KIBT) ile retrospektif olarak değerlendirmektir. Gereç ve Yöntemler: Zonguldak Bülent Ecevit Üniversitesi Diş Hekimliği Fakültesi, Ağız Diş ve Çene Radyolojisi Anabilim Dalı’na 2019 ve 2021 yılları arasında travma nedeniyle başvuran 84 hastadan alınan KIBT görüntüleri retrospektif olarak incelenmiştir. Yaş, cinsiyet, fraktür lokalizasyonu, fraktürlerde deplasman varlığı kayıt altına alındı. İstatistiksel analiz için tüm hasta grubuna tanımlayıcı ve frekans analizleri uygulanırken, hastaların yaş ve cinsiyetlerini; fraktür hattı ve fraktür bölgesi ile karşılaştırırken ki-kare testi uygulandı. Bulgular: 60 erkek 24 kadın hasta (E/K, 2,5/1) olmak üzere toplam 84 hastanın maksillofasiyal travma nedeniyle KIBT görüntüsü incelendi. Çalışmada incelenen hasta grubunun yaşları 6 ve 72 arasında değişmekte olup yaş ortalaması 33.17±1.48 olarak belirlendi. Farklı etiyolojik nedenlerden kaynaklı çeşitli lokalizasyonlarda meydana gelen 116 fraktür hattı sayısı radyolojik olarak tespit edildi. İncelenen tüm fraktürlerin 73’ünde deplasman izlenirken kalan 43 fraktür hattında deplasman görülmedi. Meydana gelen fraktürler en sık angulus mandibulada (%22,61:n=19) tespit edildi. En az fraktür mandibula ramus (%3,57; n=3) ve koronoid proseste (%3,57; n=3) görüldü. Sonuçlar: Fraktür hatlarının varlığının, lokalizasyonlarının ve kırık parçalarının yer değişiminin doğru radyografik teknikler aracılığıyla tespit edilmesi, gerekli tedavi prosedürlerinin uygulanması açısından önem taşımaktadır. İki boyutlu radyografilerin kullanımının yetersiz kaldığı durumlarda KIBT gibi üç boyutlu görüntüleme yöntemleri tercih edilmelidir. Anahtar Kelimeler: Konik Işınlı Bilgisayarlı Tomografi, Fraktür, Mandibula, Teşhi

    RELATIONSHIP BETWEEN THE DEGENERATIVE CHANGES IN THE MANDIBULAR CONDYLE AND ARTICULAR EMINENCE INCLINATION, HEIGHT, AND SHAPE: A CBCT STUDY

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    Objectives: This study aimed to analyze the articular eminence inclination and height and correlate these findings with the eminence shapes and degenerative condylar changes using cone-beam computed tomography (CBCT). Materials and Methods: The assessments were established on CBCT images of 566 temporomandibular joints (TMJ) that were included from the computer database. Age and gender were recorded for all individuals. Degenerative changes were examined in the articular surface of the condyle. The articular eminence (AE) inclination and height measurements were performed on central parasagittal slices of the TMJ. The shape of the AE was classified as box, sigmoid, flattened, and deformed. Results: The prevalence of degenerative changes in the condyle was higher in males, but no significant difference was found (p ˃ 0.05). The AE inclination and height have a relation with gender and age groups. The AE inclination and height results were greater in males (p &lt; 0.05). The reduced mean values of eminence inclination and height in the +50-year-old group were detected (p &lt; 0.05). Sigmoid and box-shaped articular eminence morphologies were more common. The eminence with deformed-shaped was related to two or more degenerative alterations in the condylar head. Conclusion: The degenerative condylar changes can affect eminence inclination and height by mechanical loading and changed articular dynamics. Gender and age have a significant effect on the AE morphology. The articular eminence shape is influenced by combinations of two or more degenerative changes
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