A digital workflow with the virtual enamel evaluation and stereolithographic template for accurate tooth preparation to conservatively manage a case of complex exogenous dental erosion

2021 ◽  
Author(s):  
Tian Luo ◽  
Junjing Zhang ◽  
Lin Fan ◽  
Yutian Huang ◽  
Jiayi Yu ◽  
...  
Keyword(s):  
Dental Erosion ◽  
Digital Workflow ◽  
Tooth Preparation

Three-dimensional Quantification of Enamel Preservation in Tooth Preparation for Porcelain Laminate Veneers: A Fully Digital Workflow In Vitro Study

2022 ◽  
Author(s):  
J Gao ◽  
L Jia ◽  
X Tan ◽  
H Yu
Keyword(s):  
Three Dimensional ◽  
In Vitro Study ◽  
Ct Scanning ◽  
Vitro Study ◽  
Digital Workflow ◽  
Anterior Teeth ◽  
Tooth Preparation ◽  
The One ◽  
Laminate Veneers

SUMMARY Objective: This in vitro study aimed to evaluate the preservation of enamel after tooth preparation for porcelain laminate veneers (PLVs) at different preparation depths based on a fully digital workflow. Methods and Materials: Sixty extracted human maxillary anterior teeth, including 20 maxillary central incisors (MCIs), 20 maxillary lateral incisors (MLIs), and 20 maxillary canines (MCs) underwent microcomputed tomography (CT) scanning, and were reconstructed as three-dimensional (3D) enamel and dentin models. Subsequently, the three-dimensional (3D) enamel models were imported into Materialise, where each enamel model underwent seven types of virtual preparation for PLVs at preparation depths at 0.1-mm increments from 0.1-0.3-0.5 mm (D1) to 0.7-0.9-1.1 mm (D7). The enamel surface was depicted by merging the virtual preparation and, respective, dentin models. The enamel area and prepared surface were measured to calculate the percentage of enamel (R%). The data were statistically analyzed using one-way analysis of variance (ANOVA) (α=0.05). Results: The group-wise mean (standard deviation) R values for the MCIs were as follows: D1-D3: 100.00 (0) each, and D4-D7: 74.70 (2.45), 51.40 (5.12), 24.40 (3.06), and 0.00 (0), respectively. The group-wise mean R values for the MLIs were 100.00 (0), 73.70 (3.40), 53.50 (3.44), 25.20 (3.79), and 0.90 (0.99) for the D1-D5 groups, respectively; and 0.00 (0) each for the D6-D7 groups. The group-wise mean (standard deviations) R values for the MCs were as follows: D1-D3: 100.00 (0) each, and D4-D7: 99.00 (1.34), 77.10 (3.28), 74.20 (3.61), and 52.20 (4.09), respectively. The one-way ANOVA revealed significant differences between the seven groups in the MCIs, MLIs, and MCs (p<0.05). Conclusions: Our results recommended preparation depths of up to 0.3-0.5-0.7 mm (MCIs), 0.1-0.3-0.5 mm (MLIs), and 0.4-0.6-0.8 mm (MCs) to facilitate complete intraenamel preparation. Moreover, 50% enamel was preserved at preparation depths of 0.5-0.7-0.9 mm (MCIs), 0.3-0.5-0.7 mm (MLIs), and 0.7-0.9-1.1 mm (MCs).

Acquisition of psychomotor skills in tooth preparation using self-paced instruction

1978 ◽  
Vol 42 (8) ◽  
pp. 476-480 ◽  
Author(s):  
GJ Dilley ◽  
JB Machen ◽  
DC Dilley ◽  
EF Howden
Keyword(s):  
Psychomotor Skills ◽  
Tooth Preparation

The Importance of Abutment Teeth Preparation Guide for Telescopic Double Crown Restorations with Friction Element

DENTA ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 69
Author(s):  
Anindita Apsari ◽  
Chaterina Dyah Nanik K
Keyword(s):  
Case Management ◽  
Female Patient ◽  
Alternative Treatment ◽  
Speech Disorders ◽  
Friction Element ◽  
The Third ◽  
Double Crown ◽  
Abutment Teeth ◽  
Tooth Preparation ◽  
Crown Preparation

<p><strong><em>Background: </em></strong><em>Telescopic double crown restoration can be used as an alternative treatment if the patient wants the tooth to be maintained as long as the supporting tooth has a healthy periodontal. In dental preparation telescopic double crown support requires a preparation guide so that the preparation can be acurate. Minimal preparation can cause the results of the telescopic double crown restoration to be overcontoured, so that the patient may occur uncomfortable, speech disorders and esthetic is not good. <strong>Objective:</strong> to provide information about the importance teeth preparation guidelines for prosthodontic treatment with telescopic double crown restorations. <strong>Case: </strong>A 72-year-old female patient, coming to the dentist wants to make dentures so that she can chew food well and improve her appearance. The remaining teeth are only 13 and 23. In making the denture, the patient wants the teeth to be retained (not removed) and the denture is aesthetically good. <strong>Case Management: </strong>Make a diagnostic wax-up on a semiadjustable articulator to estimate the results of restoration, </em><em>mould</em><em> </em><em>the patient's teeth before starting the preparation with three times putty for the preparation guide and making a temporary crown. the first putty mold is cut mesial-distal right in the middle of the incical teeth, the second putty mould is cut in the labial-palatal direction right in the middle of the tooth mould, the third putty mould is fixed on the stock tray to make the temporary crown. Preparation of teeth 13 and 23 with regard to the putty cut preparation guide, then moulding the maxilla and mandibula with double impressions using an individual tray, after that make the temporary crown directly with the third putty mould. <strong>Conclusion: </strong>The preparation guide of teeth is very necessary so that the making of telescopic double crown restorations is not overcontoured, so that esthetic and retention can be achieved which are good and do not cause speech disorders.</em></p><p><strong><em>Keywords:</em></strong><em> Telescopic double crown, tooth preparation guide, esthetic</em></p><p><strong><em>Correspondence:</em></strong><em> Anindita Apsari. Prostodonsia, Fakultas Kedokteran Gigi, Universitas Hang Tuah, Arief Rahman Hakim 150, Surabaya, Telepon 031-</em><em>5945864, </em><em>5912191, </em><em>E</em><em>mail: <span style="text-decoration: underline;">[email protected]</span></em></p>

scholarly journals In Vitro Effects of Resin Infiltration on Enamel Erosion Inhibition

2015 ◽  
Vol 40 (5) ◽  
pp. 492-502 ◽  
Author(s):  
GC Oliveira ◽  
AP Boteon ◽  
FQ Ionta ◽  
MJ Moretto ◽  
HM Honório ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Artificial Saliva ◽  
In Vitro Study ◽  
Adhesive System ◽  
Dental Erosion ◽  
Deep Penetration ◽  
Resin Infiltration ◽  
Fluorescence Confocal Microscopy ◽  
In Vitro Effects

SUMMARY Resin-based materials that show promising effects for preventing the progression of erosion have been studied. This in vitro study evaluated the effects of applying resin-based materials, including resin infiltration, on previously eroded enamel subjected to erosive challenges. The influence of enamel surface etching prior to application of the material was also studied. Bovine enamel blocks were immersed in hydrochloric acid (HCl), 0.01 M (pH 2.3), for 30 seconds in order to form a softened erosion lesion. The blocks were then randomly divided into nine groups (n=12) and treated as follows: C = control without treatment; Hel = pit & fissure resin sealant (Helioseal Clear); Adh = two-step self-etching adhesive system (AdheSe); Tet = two-step conventional adhesive system (Tetric N-bond); and Inf = infiltrant (Icon). The Helno, Adhno, Tetno, and Infno groups received the same materials without (or with no) surface conditioning. The depth of the material's penetration into softened erosion lesions was qualitatively analyzed using reflection and fluorescence confocal microscopy. After application of the materials, the blocks were immersed in HCl for two minutes; this step was followed by immersion in artificial saliva for 120 minutes four times a day for five days (erosive cycling). Both the enamel alteration and material thickness were analyzed using profilometry, and the results were submitted to Kruskal-Wallis and Dunn tests (p&gt;0.05). Images from the confocal microscopy showed minimal penetration of Adh/Adhno and deep penetration of Inf/Infno into the erosive lesions. The groups Hel, Adh, Inf, Tetno, and Infno resulted in the formation of a layer of material over the enamel, which was effective in inhibiting the progression of erosion. In conclusion, the infiltrant, with or without etching, was able to penetrate and protect the enamel against dental erosion. The other resin-based materials, except for the two-step conventional adhesive, were able to penetrate and inhibit the progression of erosive lesions only when they were applied after enamel etching.

DENTAL EROSION: Authors' response

1995 ◽  
Vol 126 (9) ◽  
pp. 1208-1210
Author(s):  
John O. Grippo ◽  
Marvin Simring
Keyword(s):  
Dental Erosion
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