In vitro comparison of microleakage, marginal fit, and cement thickness of conventional and prepless lithium disilicate veneers

PURPOSE To assess the influence of two preparation techniques on the microleakage, marginal fit, and cement thickness of lithium disilicate veneers. MATERIALS AND METHODS A total of 24 human maxillary central incisors were divided randomly into two groups according to preparation technique (n = 12): minimally invasive preparation with butt-joint design (0.3-mm depth) and a chamfer finish line (group MP); and no preparation (NP). All teeth were restored with lithium disilicate veneers cemented with photopolymerizable resin cement. Specimens were aged thermally (6,000 cycles of 5°C to 55°C) and mechanically (100,000 cycles at 100 N, 4 Hz). Specimens were immersed in fuchsin for 24 hours employing a standard dye penetration technique, then sectioned and evaluated under a stereomicroscope (x20). Data were analyzed by ANOVA and Kruskal-Wallis tests (P < .05). RESULTS There was significant microleakage (P = .0163) at the cervical area compared to the proximal area. The marginal fit was similar, with no statistical difference (P = .212) between groups MP (153 ± 81 μm) and NP (111 ± 74 μm). Group MP showed a significantly (P = .006) reduced cement thickness at the cervical area (87 ± 27 μm) compared to group NP (210 ± 89 μm). CONCLUSION Although the preparation technique was shown to influence the cement thickness, it did not show any influence on microleakage or marginal fit.

[1]  R. Frankenberger,et al.  Ceramic laminate veneers: effect of preparation design and ceramic thickness on fracture resistance and marginal quality in vitro , 2020, Clinical Oral Investigations.

[2]  D. Kugiumtzis,et al.  Influence of preparation depth and design on stress distribution in maxillary central incisors restored with ceramic veneers: A 3D finite element analysis. , 2020, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[3]  J. M. Barbosa,et al.  Periodontal considerations for adhesive ceramic dental restorations: key points to avoid gingival problems. , 2019, The international journal of esthetic dentistry.

[4]  M. Imburgia,et al.  Minimally invasive vertical preparation design for ceramic veneers: a multicenter retrospective follow-up clinical study of 265 lithium disilicate veneers. , 2019, The international journal of esthetic dentistry.

[5]  A. Farias-Neto,et al.  Tooth preparation for ceramic veneers: when less is more. , 2019, The international journal of esthetic dentistry.

[6]  M. Özcan,et al.  Comparison of fit accuracy of pressed lithium disilicate inlays fabricated from wax or resin patterns with conventional and CAD‐CAM technologies , 2018, The Journal of prosthetic dentistry.

[7]  M. Grossi,et al.  Analysis of Marginal Adaptation of Porcelain Laminate Veneers Produced by Computer-Aided Design/Computer-Assisted Manufacturing Technology: A Preliminary In Vitro Study. , 2018, The International journal of prosthodontics.

[8]  F. de Angelis,et al.  Protocol for a new concept of no-prep ultrathin ceramic veneers. , 2018, Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.].

[9]  S. Eckert,et al.  The marginal fit of lithium disilicate crowns: Press vs. CAD/CAM. , 2018, Brazilian oral research.

[10]  Yasemin Kulak Özkan,et al.  Marginal Adaptation and Fracture Resistance of Lithium Disilicate Laminate Veneers on Teeth with Different Preparation Depths. , 2018, The International journal of periodontics & restorative dentistry.

[11]  R. Reggiani,et al.  Minimally Invasive Laminate Veneers: Clinical Aspects in Treatment Planning and Cementation Procedures , 2016, Case reports in dentistry.

[12]  F. de Angelis,et al.  No-Prep Rehabilitation of Fractured Maxillary Incisors with Partial Veneers. , 2016, Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.].

[13]  S. Toksavul,et al.  3D quantification of clinical marginal and internal gap of porcelain laminate veneers with minimal and without tooth preparation and 2-year clinical evaluation. , 2016, Quintessence international.

[14]  M. O. Ahlers,et al.  Controlling the depth of ceramic veneer preparations by using a color marker in the depth grooves. , 2015, The Journal of prosthetic dentistry.

[15]  Rubén Agustín-Panadero,et al.  Vertical preparation for fixed prosthesis rehabilitation in the anterior sector. , 2015, The Journal of prosthetic dentistry.

[16]  Zhongjie Li,et al.  A three-dimensional finite element study on anterior laminate veneers with different incisal preparations. , 2014, The Journal of prosthetic dentistry.

[17]  Yogesh J. Kale,et al.  Comparative evaluation of fracture resistance of Ceramic Veneer with three different incisal design preparations - An In-vitro Study. , 2014, Journal of international oral health : JIOH.

[18]  B Kosovka Obradovic-Djuricic,et al.  Porcelain veneers - preparation design: A retrospective review , 2014 .

[19]  M. Coutinho,et al.  A meta-analysis of the most indicated preparation design for porcelain laminate veneers. , 2013, The journal of adhesive dentistry.

[20]  Galip Gurel,et al.  Influence of enamel preservation on failure rates of porcelain laminate veneers. , 2013, The International journal of periodontics & restorative dentistry.

[21]  Moustafa N Aboushelib,et al.  Internal adaptation, marginal accuracy and microleakage of a pressable versus a machinable ceramic laminate veneers. , 2012, Journal of dentistry.

[22]  G. Goldstein,et al.  Single visit fabrication of a porcelain laminate veneer with CAD/CAM technology: a clinical report. , 2011, The Journal of prosthetic dentistry.

[23]  B. Freydberg.  No-prep veneers: the myths. , 2011, Dentistry today.

[24]  Anjali Kaiwar,et al.  Survival rates of porcelain laminate restoration based on different incisal preparation designs: An analysis , 2011, Journal of conservative dentistry : JCD.

[25]  O. Addison,et al.  Adhesive Cementation and the Strengthening of All-Ceramic Dental Restorations , 2009 .

[26]  John Nosti,et al.  "Thin is in" the art of minimal & no prep veneer. , 2009, Journal of the New Jersey Dental Association.

[27]  M. Goldstein.  No-prep/minimal-prep: the perils of oversimplification. , 2007, Dentistry today.

[28]  N. Anil,et al.  A microleakage study of ceramic laminate veneers by autoradiography: effect of incisal edge preparation. , 2004, Journal of oral rehabilitation.

[29]  Daniel Edelhoff,et al.  Tooth structure removal associated with various preparation designs for anterior teeth. , 2002, The Journal of prosthetic dentistry.

[30]  Ç. Çelik,et al.  Comparison of marginal integrity of ceramic and composite veneer restorations luted with two different resin agents: an in vitro study. , 2002, The International journal of prosthodontics.

[31]  D. Samarawickrama,et al.  Stresses within porcelain veneers and the composite lute using different preparation designs. , 2001, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[32]  B Van Meerbeek,et al.  Porcelain veneers: a review of the literature. , 2000, Journal of dentistry.

[33]  P Magne,et al.  Effect of luting composite shrinkage and thermal loads on the stress distribution in porcelain laminate veneers. , 1999, The Journal of prosthetic dentistry.

[34]  S. Patroni,et al.  Measurement of enamel thickness in relation to reduction for etched laminate veneers. , 1992, The International journal of periodontics & restorative dentistry.

[35]  E. Kidd,et al.  Microleakage: a review. , 1976, Journal of dentistry.