Vol. 13 No. 3 (2023): International Dental Research

Aim: The aim of this study was to observe and evaluate the long- and short-term discoloration tendencies of lithium disilicate-based glass-ceramics (IPS e.max CAD LT) and leucite-based feldspathic glass-ceramics (VITA Mark II) materials, which are esthetically very close to each other at first glance. Methodology: 80 pieces of lithium disilicate and feldspathic blocks (A2 colored) were overglazed and polished separately to evaluate the surface treatment procedures according to CIELAB color coordinates. For accelerated aging purposes, half of the samples were treated with red wine, and the other half were treated with coffee. Color changes were calculated using the ΔE formula. The results were represented as ΔE-1, ΔE-2, and ΔE-3. Data distribution regarding numerical variety and changes was evaluated using the Shapiro-Wilk normality test and Q-Q graphics.  Results: The data was evaluated using O'Brien clinical color tolerance scales. After 4 weeks of accelerated aging, any of the samples did not show a perfect (ΔE=0-0.5) color match. Both groups have shown significant statistical changes at various rates and percentages. Conclusion: Since aging procedures affect ceramic systems' ΔE values in a variety of ways, the aging protocol utilizing in vitro aging techniques for color change should be evaluated alongside ceramic type and surface finishing procedures.   How to cite this article: Gül ÖD, Agüloğlu S. Evaluating the color stability of two esthetic ceramic materials after different surface treatments and accelerated aging procedures. Int Dent Res 2023;13(3)104-11. https://doi.org/10.5577/intdentres.426   Linguistic Revision:  The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Aim: This study aims to investigate the effects of exposure to different doses delivered by radiographic diagnostic tools on cell death pathways in isolated dental pulp stem cells on a molecular level using qRT-PCR data. Methodology: Seventy fully impacted mandibular third molars were used for the study. Extracted third molars were divided into seven groups (n = 10 each): A control group receiving no radiation, periapical (PER), panoramic (PAN), and dental tomography (CBCT) groups receiving one dose of radiation each, and periapical, panoramic, and CBCT groups receiving three consecutive doses of radiation each. Then, gene expressions in dental pulp stem cells were evaluated using the qRT-PCR this method.  Results: A significant difference was found in the expression of the ULK1 gene in the dental pulp tissue samples from the PAN1 group; GABARAP, LAMP3, APAF1, BCL2, CASPASE2, and CASPASE7 genes from the PER1 group; the ULK1 gene from the PER3 group; and ATG12, ATG16L1, ATG4A ATG5, BECN1L1, GABARAP, LAMP1, LAMP3, MAP1LC3B, ULK1, APAF1, BCL2, CASPASE-2, CASPASE-3, CASPASE-7, and CASPASE-8 genes from the CBCT3 group. Conclusion: While the radiation doses we applied to the DPSC cell culture are considered low levels, there was an increase in cell death markers with increased exposure to radiation through multiple radiography procedures. Taking measures to prevent errors during radiography and avoiding repeated, unnecessary patient exposure to radiation would help minimize the damaging effects of radiation.   How to cite this article: Kahraman OE, Karaman T, Talo Yıldırım T, Önalan E, Dündar S, Tektemur A. The effect of ionizing radiation from dental radiographic devices on dental pulp stem cells. Int Dent Res 2023;13(3):112-8 https://doi.org/10.5577/intdentres.426   Linguistic Revision:  The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Aim: Coronavirus disease 2019 (COVID-19) reportedly affects many body tissues and organs and is detectable in body fluids, such as saliva and gingival crevicular fluid (GCF). Additionally, COVID-19 can cause an increased GCF volume (GCFV). This study investigated GCFV in patients with a history of COVID-19 infection using periopapers. Methodology: This study included 50 patients (25 males and 25 females) aged 21–69 years who were considered periodontally healthy and had a history of COVID-19 infection. GCF was collected from the central incisors’ buccal sites using paper strips, and GCFV was calculated using a Periotron 8000.  Results: In patients with a history of COVID-19, the mean GCFV for all patients was 0.5226 ± 0.11 µl. The mean was 0.5208 ± 0.1011 µl in men and 0.5244 ± 0.1261 µl in women. No significant difference was found between the two genders regarding GCFV. Conclusion: Regarding GCFV, no significant difference was found between individuals with a history of COVID-19 infection and those with no history of COVID-19 infection.   How to cite this article: Üner DD, İzol BS. Evaluation of gingival crevicular fluid volume with periopapers in patients who have recovered from COVID-19 infections. Int Dent Res 2023;13(3):119-24. https://doi.org/10.5577/intdentres.492   Linguistic Revision:  The English in this manuscript has been checked by at least two professional editors, both native speakers of English.      

Aim: The aim of the study was to compare the stresses caused of different crown heights on short implants with different lengths, diameters, and designs under axial and oblique loads on the cortical bone and implant system using finite element analysis. Methodology: In the atrophic posterior mandible, four different implants of different sizes and designs were placed in the first molar region. Metal supported porcelain crowns with three different heights (10 mm, 12.5 mm, and 15 mm) were designed on the computer. A total of 12 study models were created. Axial and oblique loads were applied, and Von Mises values in the implant and abutment; maximum and minimum principal stress values in the cortical bone were evaluated by the finite element analysis method.  Results: Compared to axial load, significantly higher stress values were found at the implant and cortical bone in obliquely loaded models. As the length and diameter of the implant increased, the stress on the cortical bone decreased. Compared to the threaded implant, the plateau design implant caused less stress on the bone under vertical loads, while causing more stress on the oblique. Unlike the literature, it was observed that the stresses on the implant were higher in the larger diameter implant compared to the narrower. Conclusion: As a result of the stress values obtained within the limits of the analysis, when the lengths of the crowns restored on short implants were compared, it was determined that the axial forces were at an acceptable level under all conditions.   How to cite this article: Mahmutoğlu Eİ, Agüloğlu S. Influence of different crown lengths on shorter implants with different lengths, diameters and designs at atrophic posterior mandible: A finite element analysis. Int Dent Res 2023;13(3)125-132. https://doi.org/10.5577/intdentres.430   Linguistic Revision:  The English in this manuscript has been checked by at least two professional editors, both native speakers of English.  

Dyskeratosis congenita (DC) is the first genetic syndrome identified among telomeropathies. Its classical phenotype is characterized by mucocutaneous abnormalities, atrophy and pigmentation of the skin, oral leukoplakia, and nail dystrophy. Bone marrow failure and susceptibility to malignancy are rare, and DC is mostly an X-linked recessive, serious, multisystemic disease. This study aims to increase dentists’ awareness of this genetic disease, accompanied by oral findings. Two cases of DC are reported in this paper, along with a short review of the literature. Oral findings of the disease include dental caries, gingival recession, short roots, gingival bleeding, severe mobility of the teeth, and alveolar bone loss. DC is clinically seen mostly in males aged 5 to 12. This case report examines dermatological and oral findings consistent with the disease of two brothers diagnosed with DC who applied to the Gülhane Health Sciences University, Faculty of Dentistry, Pediatric Dentistry Department for dental caries complaints. DC is a rare disease, and dentists should pay attention to its systemic and oral symptoms during their examinations. Despite a positive prognosis of this disease, it is important to take into account any unexpected changes in hematological values and mucocutaneous malignant alterations.   How to cite this article: Aydın Varol E, Kılıç G, Bal C, Atay İ. Dyskeratosis congenita: A report of two cases. Int Dent Res 2023;13(3):133-7. https://doi.org/10.5577/idr2023.460   Linguistic Revision:  The English in this manuscript has been checked by at least two professional editors, both native speakers of English.