Yazar "Aktan, Ali Murat" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Evaluation of the relationship between maxillary sinus floor position and maxillary sinusitis using cone beam computed tomography
    (Springer, 2017) Yildirim, Eren; Ciftci, Mehmet Ertugrul; Kamak, Gulen; Aktan, Ali Murat
    The aim of this study was to evaluate the effect of the relationship between the horizontal position of the maxillary sinus floor and the tooth roots on maxillary sinus pathologies using cone beam computed tomography. The patients' age, sex, presence or absence of apical abscesses, and horizontal relationship between the maxillary sinuses and tooth roots were recorded. In total, 228 maxillary sinuses of 114 patients were divided into case and control groups according to whether pathology was present. The horizontal relationship between the tooth roots and the lower wall of the maxillary sinus was categorized into three types. The variables were analyzed using the Chi-square test. Of 42 apical abscesses, 13 (31 %) were present in the control group and 29 (69 %) were present in the case group. This difference was statistically significant (p = 0.003). Each of the 228 maxillary sinuses was classified according to its horizontal relationship to the tooth root. The most frequently seen relationship was Type II, followed by Type I and III, respectively. Although the control and case groups showed equilibrium in the distribution of Type II and III relationships, maxillary sinus pathologies were significantly less common in Type I (p < 0.001). This study shows that positioning of the maxillary sinus toward the buccal side (Type I) poses an obstacle to the spread of odontogenic infection to the sinus and that the presence of apical abscesses is correlated with maxillary sinusitis.
  • Küçük Resim
    Öğe
    Relationship between CBCT and panoramic images of the morphology and angulation of the posterior mandibular jaw bone
    (Springer France, 2016) Ciftci, Mehmet Ertugrul; Aktan, Ali Murat; Isman, Ozlem; Yildirim, Eren
    We determined actual bucco-lingual angulation values and morphological variations of residual bone in the mandibular posterior edentulous region using cone-beam computed tomography (CBCT) and panoramic radiography. A second aim was to investigate whether it was possible to predict bone morphology from panoramic radiographs. Data were collected from 77 consecutive patients referred for both CBCT and panoramic radiography in our department. Two-dimensional and three-dimensional images of the probable implant placement region were investigated. The bucco-lingual angulation values and crest type were determined directly from the cross-sectional images of the posterior edentulous region. The edentulous region was divided into three groups: second premolar, first molar, or second molar region. The observations were evaluated by the computer software, SPSS 22.0 (SPSS Inc. Chicago, USA). The crest type was classified into three groups: type U, type C, or type P. Kappa statistics, Kolmogorov-Smirnov tests, ANOVA, and Kruskal-Wallis tests were used in statistical analyses. The significance level was set at p < 0.05. Type C was more frequent in the second premolar region and the crest type had changed to type U in the second molar region. The predictability of the type U was highest in the second molar region. Moderate agreement was found in the predictability of type U in the molars (kappa = 0.602). The mean value of bucco-lingual angulation was highest in the second molar region, followed by the first molar region. There were statistically significant differences between the bucco-lingual angulation of the crest types in the second premolar and first molar regions (p < 0.05). Bucco-lingual angulation values and morphology change through the posterior mandible. Type U was predicted at a higher rate in the second molar region from panoramic radiographs. These results demonstrate predicting high-risk areas in the posterior mandible for implant therapy from panoramic radiography.