An improved method to analyse tooth and restoration contour using image analysis: Application in the maxillary anterior teeth in Chinese population

Yu, Hao; Li, Qing; Liu, Jingmei

doi:10.1016/j.archoralbio.2007.12.012

Cited by 8 publications

(10 citation statements)

References 18 publications

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“…Average preparations were, however, closer to the normal range. There was a significant difference between the contours of all examined teeth, which is in accordance with the findings by Yu et al, 23 who also found a significant difference in contours of all tested teeth. The results for the canines being overcontoured coincides with the study by Syed et al, 17 whose study had higher BL values for maxillary canines.…”

Section: And Bl Dimensions Of Antimeric Natural Teeth and Cementedsupporting

confidence: 82%

Subjective Differences between Dentists and Patients about Relative Quality of Metal Ceramic Restorations placed in the Esthetic Zone

Moaleem

Alkhayrat

Madkhali

et al. 2017

The Journal of Contemporary Dental Practice

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Introduction: Esthetic perceptions could differ between the dentist and his patients among various regions and cultures.Aim: The aims of this study were to evaluate the subjective differences between the dentist and the patient in terms of esthetics of metal-ceramic crowns (MCcs). The study also aims to compare the mesiodistal (MD) and buccolingual (BL) dimensions of the cemented crown with its respective natural antimeric tooth. Materials and methods:A total of 85 patients seeking treatment for a single crown (MC) were treated by the undergraduate students under supervision of respective academic staff. After cementation of the crowns, a 9-point questionnaire was given to patient and different dentists. A treatment cast for every single crown was poured. Then, the MD and BL dimensions of the crowns were compared against their respective antimeric tooth. Results:The dentists and the patients agreed in the range of 50.5 to 90.5%. Least subjective differences were found for the length and width of the cemented crowns. The highest differences were noted for symmetry between the cemented crown and its antimeric natural tooth. A total of 31 to 38% of the patients differed from the dentist's evaluation for shade of the crown, color of the crown at the margin, contour of the crown, and the relationship of the crowns with the surrounding gingiva. The highest MD and BL dimensions were in the cemented crown of canines, while the lowest MD and BL diameters were for the cemented crowns of the lateral incisor crowns. Conclusion:Dentist and patient mostly agreed in terms of length (90%), width (81%) and relation of crown with free gingiva (74%). However, they differed mostly on the symmetry of the Clinical significance: While fabricating a dental prosthesis, the dentist must know about patients' perception of esthetics; otherwise both clinical and laboratory efforts would not be enough to satisfy the esthetic needs of the patient even if the restoration is technically correct. Perceptions related to symmetry differ mostly between dentist and patient.

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Section: And Bl Dimensions Of Antimeric Natural Teeth and Cementedsupporting

confidence: 82%

Subjective Differences between Dentists and Patients about Relative Quality of Metal Ceramic Restorations placed in the Esthetic Zone

Moaleem

Alkhayrat

Madkhali

et al. 2017

The Journal of Contemporary Dental Practice

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“…4 It must be pointed out that coronary contour may vary in different regions of the mouth, and also in a same tooth. Therefore, it is necessary to use the natural outline as a model during the reconstruction of the tooth contour, 5 aiming at obtaining a satisfactory rehabilitation. Nevertheless, this situation was not observed in the present study since 100% of the veneers presented overcontour, even when a morphological reference was used during the sculpture of the laminate veneers.…”

Section: Discussionmentioning

confidence: 99%

“…It additionally facilitates mastication and oral hygiene, preserving periodontal physiology and propitiating clinical longevity of the restoration. [1][2][3][4][5] Inadequate reproduction of the dental contour is frequently associated with esthetic drawbacks, in addition to periodontal damage. 3,4 The periodontal tissue is frequently colonized by agents associated with periodontal pathologies.…”

Section: Introductionmentioning

confidence: 99%

Influence of anatomic reference on the buccal contour of prosthetic crowns

et al. 2009

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During clinical practice, when performing prosthetic rehabilitation with single crowns, improper reproduction of the dental contour by the dental laboratory is a common occurrence. Therefore, the present study evaluated the fidelity of the reproduction of the buccal contour in an upper left canine performed by three Dental Prosthesis Technicians (DPT) using the indirect laminate veneer technique. First, the DPTs confected the veneers based on a model obtained from the upper arch of a dental dummy, containing a replica of an upper left canine with a prosthetic preparation for a laminate veneer. Then, the same DPTs received other identical models, now with the replica of the upper left canine with no preparation, to be used as an anatomical reference for confecting the laminate veneers. The laminate veneers were then bonded to the plaster models and had their buccal contour individually measured. Measurements were also made of the buccal contour of the reference canine. The data were analyzed by ANOVA and the t-test (p = 0.05). Results showed 100% of buccal overcontour when the laminate veneers were compared to the reference canine, regardless of which DPT confected the veneer and regardless of using or not the anatomical reference. The DPTs who participated in the present study were unable to acomplish a faithful anatomical reproduction of the buccal contour, creating an overcontour in all samples. This situation may be responsible for increasing the probability of periodontal and esthetic harm in clinical practice.

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“…The morphological features of maxillary anterior tooth crowns are influential factors for esthetic performance of the anterior dentition (Fu et al, 2007;Kokich et al, 1984;Ricketts, 1982;Yu et al, 2008). The ratio of width-to-height (W/H) is one feature that is helpful in guiding dentists during treatment and treatment planning to provide the patient a suitable dental appearance (Sarver and Yanosky, 2004).…”

Section: Introductionmentioning

confidence: 99%

Morphological features of maxillary anterior teeth in a sample of Chinese population

Zhao

Cao

2015

HOMO

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An improved method to analyse tooth and restoration contour using image analysis: Application in the maxillary anterior teeth in Chinese population

Cited by 8 publications

References 18 publications

Subjective Differences between Dentists and Patients about Relative Quality of Metal Ceramic Restorations placed in the Esthetic Zone

Subjective Differences between Dentists and Patients about Relative Quality of Metal Ceramic Restorations placed in the Esthetic Zone

Influence of anatomic reference on the buccal contour of prosthetic crowns

Morphological features of maxillary anterior teeth in a sample of Chinese population

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