24 research outputs found
Impacted maxillary canines and their relationship with lateral incisor resorption: a cone beam computed tomography (CBCT) study
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
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
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
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
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
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)
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
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
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
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 < 0.05). The reduced mean values of eminence inclination and height in the +50-year-old group were detected (p < 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