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Bratner S, Hannak W, Boening K, Klinke T. Comparison of different illumination intensities of mobile units for tooth color differentiation: An in vitro study. J Prosthet Dent 2024; 131:918-924. [PMID: 35491259 DOI: 10.1016/j.prosdent.2022.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Visual color determination in clinics or dental offices should take place under reproducible environmental conditions. To reduce false tooth color measurements, daylight and illumination lamps (5000-7500 K) have been recommended. Those can be used either as stationary or mobile handheld illumination units. However, depending on the manufacturer, the handheld lights use different illuminance brightness, and whether the choice of unit affects shade selection is unclear. PURPOSE The purpose of this in vitro study was to determine whether the mobile handheld light-emitting diode (LED) lighting unit shows a significantly better result in visual color determination than the conventional reference lighting unit. MATERIAL AND METHODS Trained preclinical dental students (N=23) with a mean ±standard deviation age of 24 ±5 years participated in the study. Two color differentiation lamps (Smile lite 1620lx and Dialite Color 4450lx) (SL and DC) were each placed at a 15-cm distance to determine the color of the shade tabs (templates, N=10) with the VITA Linear Guide 3D Master in a double-blinded study. According to the manufacturer's recommendation, polarization filters were used with the Smile lite lamp. RESULTS Of N=220 shade determinations each, 31.8% (SL) and 33.2% (DC) were correct; the median (ΔE00) and interquartile range were 0.96 (±3.32) for SL and 1.35 (±3.28) for DC. The differences between the groups were not statistically significant (P=.67). CONCLUSIONS The results show that the use of the mobile LED illumination unit did not improve color determination compared with the reference illumination. The different illumination intensities of 980 lux (SL) with a polarizing filter or 1500 lux (DC) did not have a positive effect.
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Affiliation(s)
- Siegfried Bratner
- Medical Science Doctor, Department of Prosthodontics and Material sciences, University Leipzig, Leipzig, Germany
| | - Wolfgang Hannak
- Associate Professor, Charité, Universitätsmedizin Berlin, Abteilung für Zahnärztliche Prothetik, Alterszahnmedizin und Funktionslehre, Berlin, Germany
| | - Klaus Boening
- Professor, Dental Medicine Polyclinic for Dental Prosthetics, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
| | - Thomas Klinke
- Associate Professor, Department of Prosthodontics, Gerodontology and Dental Materials, Dental School, University Greifswald, Greifswald, Germany.
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Labis C, Seceleanu I, Rion K, Hassel A, Corcodel N. Accuracy of tooth color determination by dental students using daylight-calibrated dental operatory lighting sources. J Prosthet Dent 2023:S0022-3913(23)00782-5. [PMID: 38155046 DOI: 10.1016/j.prosdent.2023.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023]
Abstract
STATEMENT OF PROBLEM Lighting conditions are an essential factor for accurately determining tooth color. However, the ideal lighting conditions for determining tooth shade are rarely met and are difficult to quantify. While the use of a standardized daylight lamp D55 can improve accuracy, its high cost limits its use in dental offices. The use of modern operatory treatment units for tooth color determination is promising, as they now allow for the adjustment of light source settings such as color temperature and intensity. However, studies are needed to determine whether they provide accurate color determination. PURPOSE The purpose of this study was to assess the accuracy of visual tooth shade determinations under the adjusted light sources of 2 different dental treatment units in comparison with a standardized daylight lamp D55. MATERIAL AND METHODS Dental treatment units from 2 manufacturers KaVoLUX 540 LED (LK) and LEDview Plus (LDS) were tested. The light sources of these units were adjusted to match daylight conditions. A daylight lamp (Dialite Color 7; Eickhorst & Co. KG) was used as a control (D55). A total of 49 participants (median age of 25 years, 30 women) underwent the Ishihara screening and received standardized training calibration. A total of 2205 clinical visual tooth shade determinations were performed with the Toothguide Training Box using the Vita 3D-Master shade guide under the 3 different lighting types. Each participant had 15 color determinations made under each of the 3 light settings. Color differences were analyzed by using the Kruskal-Wallis, Wilcoxon rank-sum, and chi-squared tests (α=.05). RESULTS The type of lighting used for tooth shade determination had no significant effect on the accuracy of selected shade based on the ΔE00 metric (P=.133). Perfect matches were achieved in 50.8% of the cases under LK, 49.8% under LDS, and 53.6% under D55 light, with no significant difference among percentages (P=.315). Although there was a significant difference in time elapsed for shade determination by light type (P=.004), this difference was not clinically relevant (20.8 seconds for LK, 23.9 seconds for LDS, 21.9 seconds for D55). CONCLUSIONS The accuracy of color determination for both examined dental operatory lamps was found to be comparable with that of the standard D55 daylight lamp when adjusted to specific settings.
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Affiliation(s)
- Christos Labis
- Assistant Professor, Department of Prosthodontics, University Hospital Heidelberg, University of Heidelberg, Heidelberg, Germany
| | - Irina Seceleanu
- Professor, Department of Mathematics, Bridgewater State University, Bridgewater, Mass
| | - Kevin Rion
- Professor, Department of Mathematics, Bridgewater State University, Bridgewater, Mass
| | - Alexander Hassel
- Professor, Department of Prosthodontics, University of Heidelberg, Heidelberg, Germany
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Klinke TU, Hannak WB, Böning K, Jakstat HA, Prause E. Visual Tooth Color Determination with Different Reference Scales as an Exercise in Dental Students' Education. Dent J (Basel) 2023; 11:275. [PMID: 38132413 PMCID: PMC10742950 DOI: 10.3390/dj11120275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/07/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Visual color determination (VCD) requires color competence and individual training. The aim of this study was to evaluate the deviations in students' VCD with two different reference scales. The research hypothesis was that none of the color references would provide a better result. Participants evaluated nine templates randomly using two reference scales (VITA-classical (VC) and 3D-Master-Toothguide (3DM_TG)). The color distance to the chosen color (ΔEab) was calculated in the CIELAB 2000. The sum's changes in the parameters (LCh°) represented the target variable. Results were evaluated with non-parametric, rank-scaled methods, utilizing the median with a 25%-75% quartile. The significance level (α = 0.05) is determined using the Student's t-test. The mean ± 95%CI (SD) was -1.27 ± -1.09 (3.18); the median ΔE00 was -1.49 (-1.97; 0.96) for dC3DM_TG. The determination with VC showed noticeable differences (dCVC), with a mean ΔE00 of 0.00 ± 0.00 (2.20) and a median ΔE00 of 0.00 (1.17; 1.71). The standard error was 0.19 for the dCVC and 0.27 for the dC3DM_TG. dC3DM_TG vs. dCVC showed significant differences at p < 0.001. The dental student's VCD resulted in color deviations, regardless of the reference template used. The color deviations in hue and chroma were comparable, regardless of the reference scale. VCD's early implementation in dental education is useful to avoid shade misjudgments and potentially expensive remakes of dentures.
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Affiliation(s)
- Thomas U. Klinke
- Department of Prosthodontics, Gerodontology and Dental Materials, Center of Oral Health, University Medicine Greifswald, 17489 Greifswald, Germany
| | - Wolfgang B. Hannak
- Charité, Center for Dental and Craniofacial Sciences, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Campus Benjamin Franklin, 12203 Berlin, Germany; (W.B.H.); (E.P.)
| | - Klaus Böning
- Department of Prosthodontics, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, 01069 Dresden, Germany;
| | - Holger A. Jakstat
- Department of Prosthodontics and Material sciences, University Leipzig, 20251 Leipzig, Germany;
| | - Elisabeth Prause
- Charité, Center for Dental and Craniofacial Sciences, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Campus Benjamin Franklin, 12203 Berlin, Germany; (W.B.H.); (E.P.)
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Ismail EH, Al-Moghrabi D. Interrelationship between dental clinicians and laboratory technicians: a qualitative study. BMC Oral Health 2023; 23:682. [PMID: 37730593 PMCID: PMC10512600 DOI: 10.1186/s12903-023-03395-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/08/2023] [Indexed: 09/22/2023] Open
Abstract
BACKGROUND Effective communication among members of the dental team is essential for the delivery of high-quality dental care. However, an in-depth understanding of issues concerning the interrelationship between dental clinicians and laboratory technicians has not been previously undertaken. Therefore, the aim of the study was to explore factors influencing the interrelationship between dental clinicians and laboratory technicians. METHODS Semi-structured interviews were conducted with dental clinicians and laboratory technicians using purposeful snowball sampling. Two trained researchers conducted the interviews based on a pre-piloted topic guide. The interviews were conducted via video conferencing platform, audio-recorded, and transcribed verbatim. Field notes were taken during the interviews. Framework Methodology was used to analyze the data. RESULTS A total of 20 dental clinicians and laboratory technicians were interviewed. The average interview duration was 37 min. Participants mainly reported negative encounters and highlighted the importance of training and exposure, collaborative learning, and alignment of expectations of both parties in terms of cost of laboratory work, turnaround time, and patient preferences. The relationship between dental clinicians and laboratory technicians depends largely on effective teamwork dynamics and open communication channels. Increased workload, workforce shortage, availability of digital systems, management policies, and financial challenges were emphasized as organizational factors affecting the interrelationship between both groups. Participants highlighted the importance of shadowing, mentorship, education courses, joint discussions, patient-technician rapport, and adoption of digital technology for fostering collaborative practices between the professions. CONCLUSIONS A multitude of factors influencing the dental clinician-laboratory interrelationship at individual, interpersonal and organizational levels were identified. This study highlights the need to build a transformative relationship underpinned by mutual trust and respect. Such a collaborative relationship will facilitate optimal patient care and successful treatment outcomes. The outcome of this study can help stakeholders identify solutions for enhancing the interrelationship among the dental team, to ultimately improve patient care and efficiency of dental services.
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Affiliation(s)
- Eman H Ismail
- Department of Clinical Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Dalya Al-Moghrabi
- Department of Preventive Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Kingdom of Saudi Arabia.
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Hein S, Westland S. Illuminant metamerism between natural teeth and zirconia restorations evaluated with a chromatic adaptation transform. J Prosthet Dent 2023:S0022-3913(23)00542-5. [PMID: 37696745 DOI: 10.1016/j.prosdent.2023.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 09/13/2023]
Abstract
STATEMENT OF PROBLEM Little is known about the effect of illuminant metamerism between natural teeth and zirconia restorations, despite their increasing clinical popularity. PURPOSE The purpose of this in vitro study was to compare illuminant metamerism between pairs of natural teeth and layered zirconia restorations and pairs of natural teeth and monolithic zirconia restorations under 10 different illuminants and analyze their metameric potential. MATERIAL AND METHODS Spectral reflectance factors were obtained from 10 pairs of extracted natural teeth and layered zirconia restorations and 28 pairs of extracted natural teeth and monolithic multilayer zirconia restorations. Each pair showed a color match that was within the visual threshold for clinical acceptability (CIEDE2000≤1.8). A special index of metamerism for the change of illuminant (Milm) was calculated from the CIEDE2000 color difference equation. Descriptive statistics and the one-sample t test were used to analyze the results for the Milm and for both groups of layered and monolithic zirconia restorations (α=.05). RESULTS Layered zirconia restorations reached a mean ±standard deviation value for Milm=0.3 ±0.2 and Milm=0.5 ±0.4 for monolithic zirconia restorations (P<.01). CONCLUSIONS The effect of illuminant metamerism between natural teeth and zirconia crowns was weak and generally within the clinical acceptability limit.
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Affiliation(s)
- Sascha Hein
- Postgraduate Researcher, Graduate School of Color Science and Technology, School of Design, University of Leeds, Leeds, England, UK.
| | - Stephen Westland
- Professor, Color Science and Technology, Graduate School of Color Science and Technology, School of Design, University of Leeds, Leeds, England, UK
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Corcodel N, Herpel C, Rammelsberg P, Rion K, Seceleanu I. Effect of grinding on the optical properties of monolithic zirconia. J ESTHET RESTOR DENT 2022; 34:942-950. [PMID: 35274430 DOI: 10.1111/jerd.12898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/14/2022] [Accepted: 02/20/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The purpose of this study was to analyze the color infiltration in monolithic zirconia after grinding, which plays an essential role in the color stability of restorations after occlusal adjustment. METHODS One hundred and eight white zirconia plates (36 Dentsply Sirona-Cercon high translucency [C], 36 Zirkonzahn-Prettau [P], 36 Zirkonzahn-Prettau anterior [Pa]) were stained by infiltration with target colors Vita A2, A3.5, and A4. In a standardized experimental setup, all plates were grinded in nine successive steps (from baseline to 500 μm), and color was measured with a spectroradiometer at each grinding step. Color differences ΔE00 between initial color and after each grinding step were calculated. The data was analyzed using regression, Kruskal-Wallis test, inverse prediction, and simultaneous 95%-confidence intervals. RESULTS Grinding had a significant effect on color stability across all zirconia types and target colors (p < 0.001). At each cut level and target color, ΔE00 means for groups C, P, and Pa were statistically different (p < 0.05). Among the three zirconia types, Pa had the lowest ΔE00 mean score for cut levels 20-100 μm for A2 and between 50 and 300 μm for A3.5 and A4. For all other cut levels, differences between Pa and P were not significant (α = 0.05). C had the largest mean ΔE00 except for A4 until 100 μm, where it was second best. CONCLUSION Zirconia type had a significant effect on the color infiltration depth across all target colors. Pa showed the best color stability until 150 μm material reduction, whereas C presented significantly less color stability than the other two zirconia materials. CLINICAL SIGNIFICANCE Color stability is important for minimizing the risk of restoration failure due to unacceptable color changes after grinding. Pa is less susceptible to color change and has an additional buffer of 60 μm until exceeding the color acceptability threshold. When higher flexural strength is needed, P is to be preferred.
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Affiliation(s)
- Nicoleta Corcodel
- Department of Prosthodontics, University Hospital Heidelberg, University of Heidelberg, Heidelberg, Germany
| | - Christopher Herpel
- Department of Prosthodontics, University Hospital Heidelberg, University of Heidelberg, Heidelberg, Germany
| | - Peter Rammelsberg
- Department of Prosthodontics, University Hospital Heidelberg, University of Heidelberg, Germany
| | - Kevin Rion
- Department of Mathematics, Bridgewater State University, Bridgewater, Massachusetts, USA
| | - Irina Seceleanu
- Department of Mathematics, Bridgewater State University, Bridgewater, Massachusetts, USA
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Bratner S, Hannak W, Boening K, Klinke T. Color determination with no‐match‐templates using two different tooth color scales—An in vitro evaluation. J ESTHET RESTOR DENT 2020; 32:593-600. [DOI: 10.1111/jerd.12594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 04/07/2020] [Accepted: 04/27/2020] [Indexed: 11/27/2022]
Affiliation(s)
- Siegfried Bratner
- Department of Prosthodontics and Material SciencesUniversity Leipzig Leipzig Germany
| | - Wolfgang Hannak
- Charité – Universitätsmedizin Berlin, Abteilung für Zahnärztliche Prothetik, Alterszahnmedizin und Funktionslehre Berlin Germany
| | - Klaus Boening
- Universitätsklinikum Carl Gustav Carus Dresden, UniversitätsZahnMedizin, Poliklinik für Zahnärztliche Prothetik Dresden Germany
| | - Thomas Klinke
- Department of Prosthodontics, Gerostomatology and BiomaterialsUniversity Medicine Greifswald Greifswald Germany
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Hein S, Modrić D, Westland S, Tomeček M. Objective shade matching, communication, and reproduction by combining dental photography and numeric shade quantification. J ESTHET RESTOR DENT 2020; 33:107-117. [PMID: 32840048 DOI: 10.1111/jerd.12641] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/29/2020] [Accepted: 08/04/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The subject of this case report is the application of a newly developed workflow for objective shade communication sans visual shade assessment or the use of shade guides. CLINICAL CONSIDERATIONS Clinical complications stemming from issues relating to esthetic integration can present a burden on the restorative team, often resulting in strenuous relationships among its members. The faithful imitation of the optical appearance of dental hard tissues with direct- and indirect restorations has been at the center of interest in a great number of publications from the realm of esthetic dentistry over the past 40 years. The present report describes a new approach to objective shade communication, by transcending the role of dental photography from its purely descriptive purpose to the level of quantification, thus abandoning the use of the established shading regimes and replacing them with a patient personal shade recipe based on the CIELAB color space instead. CONCLUSIONS Objective shade communication is possible with the eLAB system by combining numeric shade quantification with dental photography. CLINICAL SIGNIFICANCE The eLAB system presents a viable alternative to the traditional approach to shade communication and shade matching in dentistry.
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Elaborative feedback in clinical dental teaching—An assessment from the students’ perspective. Ann Anat 2017; 212:48-54. [DOI: 10.1016/j.aanat.2017.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 02/17/2017] [Accepted: 02/24/2017] [Indexed: 11/18/2022]
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In vivo study for tooth colour determination—visual versus digital. Clin Oral Investig 2017; 21:2863-2871. [DOI: 10.1007/s00784-017-2088-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 02/20/2017] [Indexed: 10/20/2022]
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Klinke TU, Olms C, Pirek P, Jakstat HA, Hannak WB. Influence of tongue position on the determination of tooth shade. J Prosthet Dent 2016; 117:289-293. [PMID: 27646799 DOI: 10.1016/j.prosdent.2016.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 07/12/2016] [Accepted: 07/12/2016] [Indexed: 10/21/2022]
Abstract
STATEMENT OF PROBLEM Dentists frequently use electronic devices to determine tooth color. However, neither the instructions for these devices nor the accompanying brochures refer to the environmental conditions required at the point of measurement. PURPOSE The purpose of this multicenter prospective clinical study was to reveal whether a change in the oral background influences tooth color determination. MATERIAL AND METHODS Students (N=42) at the dental clinic in Berlin, Leipzig, Greifswald and Olomouc (women n=27, men n=15) participated in this study. It was their first contact with the spectral photometer (Easyshade Advance 4.0; VITA Zahnfabrik). After a short introduction on how to use the device, the students made 1-point measurements on the same patient on the maxillary central incisor. In the first measurement, the patient's mouth was open, and the palatal surface uncovered. In the second measurement, the patient's mouth was closed slightly, and the tongue pressed on the lingual surface of the maxillary central incisor. The mean ±SD and the 95% confidence interval (95 % CI) were calculated using the Student t test for each test series (α=.05). RESULTS Statistical evaluation of the 2 measurements revealed changes in the L*a*b* values with a mean L*=0.204, a*=-0.351, and b*=0.02; a median of 0.4, -0.3, and -0.1, respectively; a ±SD of 2.37, 0.64, and 0.89, respectively; and 95% CIs of L*=-0.476 to 0.884, a*=-0.531 to -0.702, and b*=-0.23 to 0.52, respectively. These differences were not statistically significant (P>.05). The measurements of L*, a*, and b* with and without tongue coverage of the lingual surfaces of the maxillary teeth did not show any statistically significant differences (P=.663). CONCLUSIONS The results demonstrate that the position of the tongue does not influence measurement accuracy during the application of the Easyshade Advance device.
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Affiliation(s)
- Thomas U Klinke
- Associate Professor, University of Greifswald, Dental School, Department of Prosthodontics, Gerodontology and Dental Materials, Greifswald, Germany.
| | - Constanze Olms
- Associate Professor, Department of Prosthodontics and Material Science, University of Leipzig, Leipzig, Germany
| | - Petr Pirek
- Associate Professor, Palacký University, Department of Prosthodontics, Olomouc, Czech Republic
| | - Holger A Jakstat
- Professor, Department of Prosthodontics and Material Science, University of Leipzig, Leipzig, Germany
| | - Wolfgang B Hannak
- Associate Professor, Charité Universitätsmedizin Berlin, Department of Prosthodontics, Geriatric Dentistry, and Craniomandibular Dysfunction, Berlin, Germany
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Olms C, Haak R, Jakstat HA. Development and implementation of the Clinical Tooth Shade Differentiation Course--an evaluation over 3 years. GMS JOURNAL FOR MEDICAL EDUCATION 2016; 33:Doc2. [PMID: 26958650 PMCID: PMC4766937 DOI: 10.3205/zma001001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 11/02/2015] [Accepted: 11/12/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Tooth shade differentiation concerns the identification and classification of tooth shades. The objective of this project was to implement the Clinical Tooth Shade Differentiation Course in the preclinical stage of studies and to evaluate the students' perspective over a period of 3 years. METHODOLOGY The course is planned for a duration of 10 weeks with two 45-minute sessions per semester week. The entire attendance time was 10:15 h. 2 lectures of 90 minutes each, 2 seminars of 60 min each and 2 teaching units with the phantom head and role playing took place. In addition to the various parameters of tooth shade, changes in tooth shade and the basics of dental esthetics, clinical procedures for manual and digital tooth shade determination were explained and practiced. 96% (69 of 72) of the students participated in the first evaluation in 2012/2013 (T1), and 68% of these were women. In the following year, 2013/2014 (T2), 92% (45 of 48 students) took part; 62% of these were women and 38% men. The 2014/2015 evaluation (T3) comprised 94% (45 of 48 students). Of these, 67% were women. RESULTS In the evaluation, the students gave the course a positive grade. The questions in "General/Organization" were given a mean (M) of 1.5 (SD=0.7) in T1 and T2, and 1.2 (SD=0.3) in T3. The "Overall Assessment" yielded M(T1)=1.6 (SD=0.6), M(T2)=1.5 (SD=0.5) and M(T3)=1.1 (SD=0.3). In T1 and T2, the item "The instructor actively involved the students in the course" was given a mean of 2.1 (SD=0.9), and in T3 a mean of 1.2 (SD=0.5). CONCLUSIONS The course presented here conceptually shows how practical dental skills can be taught in a theoretical and clinical context. Educational objectives from the role of a dental expert were taken from the national competence-based catalog of educational objectives for dentistry and can also be supplemented. The objectives can be transferred to other dental faculties.
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Affiliation(s)
- Constanze Olms
- University of Leipzig, Department of Prosthodontics and Material Science, Germany
| | - Rainer Haak
- University of Leipzig, Department of Cariology, Endodontology and Periodontology, Germany
| | - Holger A. Jakstat
- University of Leipzig, Department of Prosthodontics and Material Science, Germany
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Weyhrauch M, Igiel C, Pabst AM, Wentaschek S, Scheller H, Lehmann KM. Interdevice agreement of eight equivalent dental color measurement devices. Clin Oral Investig 2015; 19:2309-18. [PMID: 25797414 DOI: 10.1007/s00784-015-1456-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 03/11/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The reproducibility of electronic color-measuring devices used in dentistry refers to the consistency of measurements of a single device and also that between identical devices. This in vitro study evaluated the short-term interdevice agreement of eight equivalent dental measurement devices. METHODS The short-term repeatability of eight identical VITA Easyshade Advance color measurement devices was evaluated. Each device was used to quantify the Commission Internationale de l'Eclairage (CIE) L*a*b* color coordinates of ceramic disks, designed in accordance with guidelines set by the VITA Toothguide 3D-Master shade tab organization. Statistical analysis involved calculating the intraclass correlation coefficients (ICCs) and color differences (ΔE*) for corresponding measurements taken by the devices. In addition, the mean color difference from the mean (MCDM) was calculated for each color. RESULTS All devices showed high ICCs for the color coordinates (L = 0.996, a = 0.993, b = 0.999). The ΔE* by shade ranged from 0.62 to 1.67. The MCDM by color-measuring device ranged from 0.11 to 0.23. CONCLUSION This in vitro study showed that the color-measuring devices used were suitable for determining shade with high repeatability. CLINICAL RELEVANCE The high interdevice agreement of the VITA Easyshade Advance means that dental professionals can use this device independently, without compromising the consistency and quality of color measurements.
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Affiliation(s)
- M Weyhrauch
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany.
| | - C Igiel
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - A M Pabst
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - S Wentaschek
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - H Scheller
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - K M Lehmann
- Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
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