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  • Küçük Resim
    Öğe
    Color stability of CAD/CAM materials with colored beverages thermocycling
    (2019) Ozen, Funda; Demirkol, Nermin
    Aim: The aim of this study was to compare the effects of different surface finishing treatments applied to two different CAD/CAM materials on the color stability after thermal aging with coffee and cola.Materials and Methods: Polymerized resin nanoceramic (LAVA Ultimate, LU) and lithium disilicate glass-ceramic (IPS e.max CAD, EC) were examined in the study. The samples with A1 HT color at a size of 14 x 12 mm and a thickness of 0.5 ± 0.05 mm were prepared from these ceramic materials (N=144). Color measurement of each specimen was calculated with a spectrophotometer using color parameters on a gray backing between baseline color, polishing/glazing and after 5000 cycles of coffee and cola thermocycling. ANOVA and the Fisher’s LSD test were used for testing statistical significance (p 0.05).Results: LU exhibited higher color change values than EC after thermal aging. In the EC group, glazing provided statistically different results as compared to the manual and control groups (p 0.05). The lowest color change for all stages was observed in IPS e.max CAD ceramics that were treated by glazing.Conclusion: In terms of color stability, glazing can be recommended for EC, and manual polishing as an alternative to glazing for LU.Keywords: CAD/CAM; ceramics; prosthodontics.
  • Küçük Resim
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    A retrospective analysis of anterior single dental implants
    (2019) Demirkol, Nermin; Demirkol, Mehmet
    Aim: This retrospective study aimed to examine the demographic data of patients who underwent an intraosseous maxillary anterior single dental implant and the characteristic features of dental implants, including diameter/length, distribution of anatomic localization and implant failure.Material and Methods: Demographic data, including the distribution of dental implants according to age, gender and the age of 108 patients who underwent dental implant placement in the researchers’ clinic between 2009 and 2015 were obtained from archival records. Only patients with the loss of a single tooth in the anterior region of the jaws were included. Anatomic localizations, diameter/height characteristics and implant failure results of the dental implants were analyzed with descriptive statistical analysis. Results: Of 108 patients, 47 (36.7%) were males and 61 (63.3%) were females. A total of 120 dental implants were evaluated. The mean age of the patients was 35.4±15.63 years, ranging from 18 to 70 years. The ages of the second decade, particularly 18 or 19 years old, was the most placed dental implant (n=24, 25%). A total of 103 (85.8%) implants were surgically placed into the maxillary anterior region and 17 (14.2%) into the lower jaw. The most common implant diameter was 4.1 mm (17 patients, 14.1%) and the length was 14 mm (42 patients, 35%).Conclusion: This study showed that the dental implant treatment in the esthetic region was demanded immediately by the patients without any further bone resorption.Keywords: Dental implant; mandible; maxilla; esthetic zone.
  • Küçük Resim
    Öğe
    A retrospective analysis of single dental implants in three different diameters
    (2019) Parlar Oz, Ozge; Demirkol, Nermin; Ercil, Mahmut
    Aim: The aim of this study is to examine the distribution of intra-osseous dental implants in the mandible and maxilla applied to correct single missing tooth defects in terms of their size and length and retrospectively evaluate the implant loss rate.Material and methods: Demographic data showing the age/sex and dental implant records of 180 patients who underwent dental implant treatment at our clinic between 2011 and 2016 were retrieved from archival records. Patients with a missing single tooth in the mandible and maxilla who had an implantation in three different diameters (4.1 mm, 4.5 mm, 4.8 mm) were included. The anatomical localizations, height characteristics and rate of losses concerning the implants were analyzed by descriptive statistical analysis.Results: Of the 180 patients, 79 received dental implants with a diameter of 4.1 mm; 49 received dental implants with a diameter of 4.5 mm and 52 received dental implants with a diameter of 4.8 mm, making it 221 in total. The mean age of the patients included in the study was 43.1 years. Of the 180 patients, 105 (58.3%) were male and 75 (41.7%) were female. The length of the most commonly used implant was 14 mm (34%) with a diameter of 4.1 mm (45.2%). Of the 221 implants examined, 111 were placed on the maxilla (50.22%) and 110 on the mandible (49.78%). Of the implants examined, 18 were implanted in the anterior region (8.14%); 33 in the premolar region (15%) and 170 in the molar region (77%).Conclusion: This retrospective study found that single-tooth implant treatment covers a wide range of ages, mainly applied to patients aged 30 to 40 years. Treatment with single-tooth implants was shown to be a successful treatment with a high survival rate when factors such as implant diameter/length and age/sex of the patient are considered.