Yazar "Kose, Mehmet Numan" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Comparison of Play Dough and Bread Dough with Ballistic Gel as Soft Tissue Simulator: An Ex-Vivo Study with Sheep's Head as the Gold Standard
    (Pera Yayincilik Hizmetleri, 2025) Cimen, Tansu; Saka, Yunus Yigit; Gulsen, Ibrahim Tevfik; Kose, Mehmet Numan; Satir, Samed
    Objective: This study aims to test the usability of bread dough, play dough, and ballistic gel in soft tissue simulations by comparing them with a sheep's head as the gold standard. Cone beam computed tomography (CBCT) images of the sheep's head was obtained as the gold standard. Methods: The sheep's head was re-covered with ballistic gel, play dough, and bread dough, respectively. Two different CBCT images (protocol A-FOV: 8x15cm, 90kVp, 6.3mA, 4.5s, 0.35mm-voxel size, 574 mGy cm(2); protocol B-FOV: 13x15cm, 90kVp, 5mA, 8.1s, 0.30mm-voxel size, 823 mGy cm(2)) were obtained from the gold standard and each simulation model. The Hounsfield unit (HU) feature in the software of the CBCT was used to evaluate gray values. Pearson Correlation Coefficient was used to examine the relationship between variables that comply with normal distribution, and Spearman's rho Correlation Coefficient was used to examine the relationship between variables that do not comply with normal distribution. The significance level was taken as p < 0.05. Results The highest positively significant correlation with the gold standard in the mandible was with bread dough (r = 0.944, p < 0.001), while in the maxilla it was with play dough (r = 0.879, p < 0.001). The highest positive significant correlation with the gold standard in gray values selected from teeth and bone was with ballistic gel (r = 0.762, p=0.004; r = 0.638, p=0.008, respectively), while in pulp it was with play dough (r = 0.874, p < 0.001). A very high, positive, and significant correlation was found between protocols A and B of all simulation models. The highest positive significant correlation of the gold standard protocol A was found with the ballistic gel simulation protocol B (r = 0.893, p < 0.001). Conclusion: Play-dough can be an alternative soft tissue simulator to ballistic gel, especially in ex vivo studies on pulp morphology.
  • [ X ]
    Öğe
    Evaluation of masseter muscle thickness of mouth breathing patients using ultrasonography
    (Bmc, 2025) Kose, Mehmet Numan; Cimen, Tansu
    Background Chronic mouth breathing negatively affects the growth of the craniofacial complex and creates problems on the dental structures and adjacent skeletal muscle structures. In this study, it was aimed to investigate the possible effects of this situation on the muscles in the chewing system by evaluating the masseter muscle thickness in mouth-breathing individuals by ultrasonography. Materials and methods A total of 50 patients (26 males and 24 females) between the ages of 18-65 years were included in the study and constituted the mouth breathing group, while a total of 50 patients (24 males and 26 females) constituted the control group. The masseter muscles of the patients were monitored both at rest and during contraction, separately on the right and left sides for both groups, and thickness measurements were made by ultrasonography imaging. Results According to the data obtained, the masseter muscle thickness values of the mouth breathing male patient group were found to be significantly lower than the control male group according to the variables of side and contraction status (p < 0.05), while no significant value was observed in the comparison of the female patient group and the control group (p > 0.05). While no difference was observed in the evaluation of the patient and control groups according to age factors (p > 0.05), the muscle thicknesses of male patients were significantly higher than those of female patients on both sides and in both positions in the gender variable (p < 0.05). Conclusion It can be stated that mouth breathing causes a negative effect on masticatory functions by creating an obstacle to normal physiology in the masticatory system and reduces the activation of the masseter muscle, which is one of the main elements of masticatory function.