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Öğe Clinical assessment of scanning deviations of four intraoral scanner systems following the cut-out and rescan procedures with dental dam isolation(Elsevier Inc., 2026) Korkut, Bora; Senol, Ayse Aslı; Saygılı, Cevdet Can; Doğu Kaya, Bengü; Gresnigt, Marco M.M.; Özcan, MutluStatement of problem: The effect of errors in the cut-out and rescan procedure with dental dam isolation in restorative dentistry might be crucial for the clinical success of indirect restorations, but investigations are lacking. Purpose: The purpose of this clinical study was to assess the scanning deviations of 4 intraoral scanners (IOSs) after the cut-out and rescan procedure with dental dam isolation and to compare 2 different computer software programs in the assessment of the deviations. Material and methods: Twenty initial scans (prescans) were collected from 20 participants using 4 dental IOSs (TRIOS 3; 3Shape A/S, Cerec Primescan; Dentsply Sirona, iTero Element 5D; Align, iTero Lumina; Align). The 3-dimensional data were obtained from the right side of the mandible between the canine and the second molar area and recorded in standard tessellation language (STL) format. Then, the second premolar was cut on the screen of each IOS using the cutting tool in its software program, within 1 mm of the adjacent teeth. The dental dam was applied, and the same quadrant was rescanned by each IOS for each participant to allow the software program to overlap the 2 scans and fill in the cut-out area. The superimposition scan was recorded in STL format as the rescan data. The trueness of each scanner was assessed by overlapping the prescan and rescan data with Geomagic ControlX (3D Systems) and Oracheck (Dentsply Sirona) software programs to assess the root mean square (RMS) errors and the mean distance (MD) deviations, respectively. The deviations were assessed individually for the first premolar, second premolar, and first molar. Two-way ANOVA and Robust ANOVA with the median method were used for the statistical analyses (?<.05). Results: The overall RMS errors ranged between 60 and 90 µm, and the overall MD deviations ranged between 80 and 200 µm. All scanners presented beyond 60 µm of RMS errors with significant differences between them for the overall comparisons (P=.001). The iTero Lumina presented the lowest RMS error (60 ±20), followed by iTero Element 5D (70 ±20), Primescan (70 ±30), and TRIOS 3 (80 ±30) (P=.001). Regardless of the scanner type, the second premolar had significantly the highest RMS error (90 ±30) (P<.001). Regarding the overall data, a very low agreement was observed between MD deviations and RMS errors (Cronbach alpha=.047). Conclusions: The cut-out and rescan procedure with dental dam isolation may cause RMS errors ranging from 60 to 90 µm, which were below the clinically acceptable limits. The deviation occurred mainly in the cut-out area, while the adjacent teeth were less affected. The level of deviation may vary depending on the selected IOS. The Oracheck may not be a good replacement for the Geomagic ControlX regarding the assessment of the deviations between the 2 scans. © 2025 Editorial Council for The Journal of Prosthetic DentistryÖğe Clinical Evaluation of Complications for Single Visit Class III and Class V Restorations at the First Recall Appointment(Marmara Univ, Inst Health Sciences, 2025) Kaya, Bengu Dogu; Korkut, Bora; Ozturk, Ezgi Kizil; Alkan, Elif; Atali, Pinar YilmazObjective: Clinical evaluation of senior students' Class III and Class V restorations at the first recall (control) appointment, regarding revised FDI criteria. Methods: Seventy-six anterior Class III and V restorations were assessed. A nano-ceramic, simplyshade composite (NeoSpectra-ST, Dentsply) was used. Restorative procedures were checked and approved by an experienced (3 years) restorative dentistry instructor. The first recall (control) appointment was scheduled 1 week after the restorations and a restorative instructor re-evaluated the restorations based on the biological, functional, and esthetic aspects of revised FDI criteria. Results: Significantly greater scores were observed for Esthetic criteria compared to Functional and Biological criteria (p<.001). Six failures were detected forform and contour, two for surface luster and texture, two for marginal staining, and two for color match. Onlyfortheform and contour criteria, Class V restorations obtained significantly higher scores than Class III (p=.033). Conclusion: Although anterior composite restorations were approved by an experienced instructor, various irreversible complications were observed at the first recall. Following the restorative procedure, a control appointment shortly is considered mandatory. The highest risk for failure was detected for Esthetic criteria. Class III restorations are considered more prone to failures compared to Class V.Öğe Influence of the cut-out-rescan procedure and rubber dam color on the trueness of intraoral scanners: A laboratory evaluation(Mosher and Linder, Inc, 2025) Senol, Ayse Aslı; Kaya, Beng¨ Do?u; Bal, Ece; Cengiz, Hatice B.; Korkut, Bora; Yılmaz Atalı, PınarPurpose: To evaluate the laboratory effect of the cut-out-rescan procedure and the rubber dam color on the trueness of two intraoral scanners (IOS). Methods: An onlay preparation was performed on a typodont maxillary left 1st molar. The left hemi-arch of the maxilla was scanned using two IOS (Trios 3, 3Shape; n=20). These digital scans were defined as references and exported. The prepared tooth and 1 mm proximal surfaces were cut-out using the IOS' software tools. Following the rubber dam (blue-color) isolation, the cut-out area was rescanned and recorded. Reference and rescan data in .STL were uploaded to the software programs and superimposed. The deviations were obtained selectively for the teeth. Also, additional hemiarc rescans with different rubber dam sheet colors (blue, purple, and black) were obtained and superimposed with reference scan without cut-out procedure. Trueness was evaluated using root mean square (RMS) error by Geomagic Control X and mean distance (Md) by Oracheck. Data were analyzed using ANOVA, Shapiro-Wilk, and Independent Samples (P< 0.05). Results: The Md values by the Trios 3 were significantly higher than Omnicam for the 1st premolar and 1st molar (P< 0.05). Omnicam's RMS and Md values for the 2nd molar were significantly higher than 1st premolar and 1st molar (P< 0.001). Trios's RMS values were significantly higher for the 2nd molar than the 1st molar (P< 0.001). A lower deviation in Md values was obtained for black rubber dam color compared to the blue and purple in Omnicam and the purple in Trios (P< 0.005). © 2025 Mosher and Linder, Inc. All rights reserved.Öğe Nine-year Follow-up of Autotransplantation in the Maxillary Anterior Region: Replacing a Fused Incisor with a Supernumerary Tooth(Elsevier Inc., 2025) Sezer, Berkant; Şen Yavuz, Betül; Korkut, Bora; Menteş, AliThe goal of tooth autotransplantation is to restore a missing tooth by using a functional tooth from the same patient. Although this procedure is gaining more recognition as a viable treatment option in dentistry, it is important to monitor and report long-term results. This case report presents the long-term follow-up of a fused maxillary central incisor that was extracted and replaced with a supernumerary tooth. Although the donor tooth displayed favorable characteristics, including an intact periodontal ligament and minimal extraoral time, which contributed to the success of the transplantation, it also presented certain disadvantages, such as having a fully developed root apex. Over a 9-year follow-up period, no clinical symptoms indicative of functional failure were observed. However, external cervical root resorption, first detected at the 6-year follow-up, progressed by the ninth year. Despite the lack of clinical symptoms, radiographic findings suggested that the root resorption was a significant concern. This case underscores the potential for long-term success of autotransplanted teeth, even in complex scenarios involving fused teeth. However, it also highlights the importance of thorough, long-term monitoring to detect complications such as root resorption. The findings suggest that, while autotransplantation can offer favorable outcomes, careful management and periodic evaluations are essential to ensure the longevity of the transplanted tooth. © 2025 American Association of Endodontists
