Influence of occlusal anatomy on acrylic resin CAD/CAM crowns fracture load and stress distribution.

Alexandre Luiz Souto Borges, Aline Lins de Lima, Larissa Mendes Campaner, Marco Antonio Bottino, Amanda Maria de Oliveira Dal Piva, João Paulo Mendes Tribst

Abstract


Objectives: This study compared the influence of occlusal anatomy on acrylic CAD/CAM crowns fracture load and stress distribution. The null hypothesis was that there would be no difference between the provisional crowns fracture load and stress according to different occlusal anatomy.

Methods: A full-crown preparation was simulated using dentin analogue (G10, Protec, São Paulo, Brazil) totaling 20 identical preparations. Next, twenty acrylic crowns were milled using different occlusal design parameter (Young or Adult) available in the software database. The crowns were cemented (Temp-bond, NE Kerr Dental, Brea, CA, USA) and fractured using a compressive load (0.5 mm/min of cross-head speed). Data were analyzed by using one-way ANOVA and Tukey tests (p< 0.05). A similar geometry was modeled and exported to the analysis software to perform a static structural analysis. The maximum principal stress was calculated using the finite element method with 300 N chewing load simulation.

Results: The occlusal anatomy significantly influenced the load-to-fracture (p<0.05). Young design showed lower fracture load (1139±132 N) than Adult design (2007±345 N). The tensile stress distribution showed a similar pattern for both groups however the highest stress peak was calculated for Young design (76 MPa) in the occlusal surface.

Conclusion: The anatomy design with higher cusp angulation and occlusal sulcus more evident can increase the stress concentration and reduce the fracture load for acrylic resin CAD/CAM crowns.


Keywords


Finite Element Analysis; Computer-Aided Design; Crowns; Acrylic Resins; Weight-Bearing

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References


Abdullah AO, Tsitrou EA, Pollington S. Comparative in vitro evaluation of CAD/CAM vs conventional provisional crowns. J Appl Oral Sci 2016; 24(3):258-63.

Rodrigues VA, Dal Piva AO, Yamaguchi CA, Borges AL, Mukai MK, Tribst JP. Effect of framework type on survival probability of implant-supported temporary crowns: An in vitro study. J Clin Exp Dent 2020; 12(5):433-9.

Reeponmaha T, Angwaravong O, Angwarawong T. Comparison of fracture strength after thermo-mechanical aging between provisional crowns made with CAD/CAM and conventional method. J Adv Prosthodont 2020; 12(4):218-24.

Winter A, Schurig A, Rasche E, Rösner F, Kanus L, Schmitter M. The flexural strength of CAD/CAM polymer crowns and the effect of artificial ageing on the fracture resistance of CAD/CAM polymer and ceramic single crowns. J Mater Sci Mater Med 2019; 31(1):9.

Alt V, Hannig M, Wöstmann B, Balkenhol M. Fracture strength of temporary fixed partial dentures: CAD/CAM versus directly fabricated restorations. Dent Mater 2011; 27(4):339-47.

Bowley JF, Ichim IP, Kieser JA, Swain MV: FEA evaluation of the resistance form of a premolar crown. J Prosthodont 2013; 22(4):304-12.

Sornsuwan T, Swain MV. Influence of occlusal geometry on ceramic crown fracture; role of cusp angle and fissure radius. J Mech Behav Biomed Mater 2011; 4(7):1057-66.

Zhang Z, Sornsuwan T, Rungsiyakull C, Li W, Li Q, Swain MV. Effects of design parameters on fracture resistance of glass simulated dental crowns. Dent Mater 2016; 32(3):373-84.

Shahmoradi M, Wan B, Zhang Z, Wilson T, Swain M, Li Q. Monolithic crowns fracture analysis: The effect of material properties, cusp angle and crown thickness. Dent Mater 2020; 36(8):1038-51.

Dal Piva AO, Tribst JP, Borges AL, de Melo RM, Bottino MA. Influence of substrate design for in vitro mechanical testing. J Clin Exp Dent 2019; 1(11):119-25.

Souza AC, Xavier TA, Platt JA, Borges AL. Effect of base and inlay restorative material on the stress distribution and fracture resistance of weakened premolars. Oper Dent 2015; 40(4):158-66.

Tribst JPM, Monteiro JB, Venturini AB, Pereira GKR, Bottino MA, Melo RM, Valandro LF. Fatigue Failure Load of Resin-bonded Simplified Lithium Disilicate Glass-Ceramic Restorations: Effect of Ceramic Conditioning Methods. J Adhes Dent. 2019;21(4):373-381.

Tribst JP, Dal Piva AO, Madruga CF, Valera MC, Bresciani E, Bottino MA, de Melo RM. The impact of restorative material and ceramic thickness on CADCAM endocrowns. J Clin Exp Dent. 2019; 1;11(11):969-977.

Penteado MM, Tribst JPM, Dal Piva AM, Ausiello P, Zarone F, Garcia-Godoy F, Borges AL. Mechanical behavior of conceptual posterior dental crowns with functional elasticity gradient. Am J Dent. 2019; 32(4):165-168.

Calderon PDS, Kogawa EM, Lauris JRP, Conti PCR. The influence of gender and bruxism on the human maximum bite force. J Appl Oral Sci 2006;14(6):448-53.

Karaman T, Eser B, Altintas E, Atala MH. Evaluation of the effects of finish line type and width on the fracture strength of provisional crowns. Odontology 2020; 1-6.

Dureja I, Yadav B, Malhotra P, Dabas N, Bhargava A, Pahwa R. A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study. J Indian Prosthodont Soc 2018; 18(4):314-20.

Muric A, Gokcen Röhlig B, Ongul D, Evlioglu G. Comparing the precision of reproducibility of computer-aided occlusal design to conventional methods. J Prosthodont Res 2019; 63(1):110-4.

Fasbinder DJ, Poticny DJ. Accuracy of occlusal contacts for crowns with chairside CAD/CAM techniques. Int J Comput Dent 2010; 13(4):303-16.

Wan B, Shahmoradi M, Zhang Z, Shibata Y, Sarrafpour B, Swain M, Li Q. Modelling of stress distribution and fracture in dental occlusal fissures. Scientific reports 2019; 9(1):1-10.

da Fonseca GF, Dal Piva AM, Tribst JP, Borges AL. Influence of restoration height and masticatory load orientation on ceramic endocrowns. J Contemp Dent Pract 2018; 19(9):1052-7.

Syam S, Soegiharto BM, Siregar E. Stress distribution of maxillary anterior retraction using miniscrew with anterior hook on continuous wire (3D simulation finite element analysis). J Int Dent Medical Res 2018; 11(3):791-798.

Archangelo KC, Penteado MM, Dal Piva AMDO, Nogueira AS, Tribst JPM, Borges A LS. Stress distribution and failure load of multilayer and monolayer glass ceramic. Braz Dent Scii. 2019; 22(1), 17-22.

Costa VL, Tribst JP, Borges AL. Influence of the occlusal contacts in formation of Abfraction Lesions in the upper premolar. Braz Dent Sci. 2017; 20:115–123.

De Andrade GS, Tribst JPM, Orozco EI, Augusto MG, Bottino MA, Borges AL, Anami LC, Saavedra GD. Influence of different post-endodontic restorations on the fatigue survival and biomechanical behavior of central incisors. Am J Dent. 2020; 33(5):227-234.

Saisadan D, Manimaran P, Meenapriya PK. In vitro comparative evaluation of mechanical properties of temporary restorative materials used in fixed partial denture. J Pharm Bioallied Sci. 2016 Oct;8(Suppl 1):S105-S109.

Türp JC, Greene CS, Strub JR. Dental occlusion: a critical reflection on past, present and future concepts. J Oral Rehabil 2008; 35(6):446-53.

Tribst JPM, Dal Piva AMDO, Lopes GC, Borges ALS, Bottino MA, Özcan M, et al. Biaxial flexural strength and Weilbull characteristics of adhesively luted hybrid and reinforced CAD/CAM materials to dentin: effect of self-etching ceramic primer versus hydrofluoric acid etching. J Adhes Sci Technol. 2020; 34(12):1253-68

Reeponmaha T, Angwaravong O, Angwarawong T. Comparison of fracture strength after thermo-mechanical aging between provisional crowns made with CAD/CAM and conventional method. J Adv Prosthodont. 2020 Aug;12(4):218-224.




DOI: https://doi.org/10.5195/d3000.2021.118



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