Dentin exposure in tooth preparations for porcelain veneers: A pilot study

Cherukara, George; Davis, Graham; Seymour, Kevin; Zou, Lifong; Samarawickrama, Dayananda

doi:10.1016/j.prosdent.2005.08.016

Cited by 28 publications

(30 citation statements)

References 14 publications

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“…Dentin exposure, is mostly seen in the cervical area of the preparation and contains often a quarter of the entire labial preparation surface [3]. Thus, it was suggested that preparations having enamel between 50 to 70% on the entire tooth surface would ensure durable adhesion [31,32]. Built on this statement, in our study, ¼ dentin exposure was considered as the critical amount of dentin during preparations.…”

Section: Discussionmentioning

confidence: 79%

“…Former studies showed that removal of only 0.5 mm in the cervical area could already result dentin exposure [1,2]. Dentin exposure, is mostly seen in the cervical area of the preparation and contains often a quarter of the entire labial preparation surface [3]. Thus, it was suggested that preparations having enamel between 50 to 70% on the entire tooth surface would ensure durable adhesion [31,32].…”

Section: Discussionmentioning

confidence: 99%

“…Although preparation for laminate veneers could be achieved within the vicinity of enamel, some dentin exposure, especially at the cement-enamel junction or below in the cervical area, is sometimes unavoidable [1][2][3]. Freehand preparation of such restorations, without the use of putty indices or guiding grooves of depth may yield to deeper preparations with higher amount of dentin exposure [2].…”

Section: Introductionmentioning

confidence: 99%

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Effect of immediate and delayed dentin sealing on the fracture strength, failure type and Weilbull characteristics of lithiumdisilicate laminate veneers

et al. 2016

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OBJECTIVES Adhesion on dentin is less reliable than on enamel, which could affect the durability of laminate veneers (LV). Immediate dentin sealing (IDS) is suggested instead of delayed dentin sealing (DDS) to overcome hypersensitivity and prevent debonding from dentin. This study evaluated the effect of IDS and DDS on the durability of Li2Si2O5 laminate veneers in vitro. METHODS Window preparations were made on the labial surfaces of sound maxillary central incisors (N=50). They were randomly divided into five groups: Group 1: Enamel only+H3PO4+Adhesive (control); Group 2: <1/4 dentin+H3PO4+DDS (2 weeks later); Group 3: Complete dentin+H3PO4+DDS (2 weeks later); Group 4: <1/4 dentin+H3PO4+IDS; Group 5: Complete dentin+H3PO4+IDS. Li2Si2O5 laminate veneers (e.max Press) were bonded to the labial surfaces of the teeth with adhesive resin cement (Variolink Veneer). IDS layers were silicacoated (CoJet System) and silanized (ESPE-Sil). The teeth with their bonded laminates were thermocycled (10.000× cycles) and then subjected to static loading (1mm/min). Failure type and location after debonding were classified. Data were analyzed using ANOVA and Tukey's post hoc test ( =0.05). Two-parameter Weibull distribution values including the Weibull modulus, scale (m) and shape (0), values were calculated. RESULTS Mean fracture strength (N) per group in descending order was as follows: Group 5 (576±254), Group 4 (478±216), Group 1 (473±159), Group 2 (465±186), and Group 3 (314±137). The presence of complete dentin exposure sealed with DDS after 2 weeks on the bonded surface (Group 3) resulted in significantly lower fracture strength results than those in group 5 with IDS (p=0.034). Weibull distribution presented higher shape (0) for Group 1 (3.67), than those of other groups (2.51-2.89). Failure types were predominantly adhesive failure between the cement and the laminate veneer in Groups 1, 2, 4 whereas Group 3 presented more often complete adhesive failures between the cement and dentin. In Group 5, failures showed some IDS and cement with or without ceramic fracture attached on the tooth. SIGNIFICANCE When laminate veneers are bonded to a large dentin substrate, application of immediate dentin sealing improves adhesion and thereby, the fracture strength of Li2Si2O5 laminate veneers. Gresnigt, Marco M M; Cune, Marco S; de Roos, Joanne G; Özcan, Mutlu (2016) ABSTRACTObjectives. Adhesion on dentin is less reliable than on enamel, which could affect

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of immediate and delayed dentin sealing on the fracture strength, failure type and Weilbull characteristics of lithiumdisilicate laminate veneers

et al. 2016

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“…The tip of the diamond establishes a slight chamfer finish line at the gingiva. [3,4] • Proximal reduction: Proximal extension is just a continuation of facial reduction with the round end tapered diamond. Adequate reduction is recommended at the line angle and uneven finish line is avoided by keeping the bur parallel with the long axis of the teeth.…”

Section: Methodsmentioning

confidence: 99%

“…The multiwheel diamond burs are used to create 0.5-mm deep orientation grooves in the incisal edge and the remaining tooth structure is removed by round end tapered diamond. [4] • Lingual reduction: Lingual finish line is created by round end tapered diamond by holding the bur parallel to the lingual surface and forming a slight chamfer of 0.5-mm deep. Moreover, the lingual finish line depends on the thickness of the teeth and the patient's occlusion.…”

Section: Methodsmentioning

confidence: 99%

Porcelain laminate veneers: A review

Hari¹,

Poovani²

2017

JCRI

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The evolution of porcelain veneers started by Pincus, who attached thin labial porcelain veneers temporarily with denture adhesive powders to enhance the appearance of Hollywood stars close-up photographs has now became one among the most recommended treatment for a dentist and a requested treatment by many of the patients. They are considered as the first alternative to improve the esthetics of the anterior teeth and by consequent-related quality of life. Successful results of porcelain veneers depend on the clinical and laboratory steps involved, along with the understanding of the scientific background of procedure. Therefore, porcelain veneers have to be reviewed and discussed in detail. The purpose of this article is to review literature and present important parameters such as case selection, shade selection, tooth preparation, provisionalization, cementation, and patient maintenance for long-term success of porcelain veneers.

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Update to Preparation Design and Clinical Concepts Using the LeSage Veneer Classification System

LeSage¹

2020

Esthetic Oral Rehabilitation With Veneers

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Dentin exposure in tooth preparations for porcelain veneers: A pilot study

Cited by 28 publications

References 14 publications

Effect of immediate and delayed dentin sealing on the fracture strength, failure type and Weilbull characteristics of lithiumdisilicate laminate veneers

Effect of immediate and delayed dentin sealing on the fracture strength, failure type and Weilbull characteristics of lithiumdisilicate laminate veneers

Porcelain laminate veneers: A review

Update to Preparation Design and Clinical Concepts Using the LeSage Veneer Classification System

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