Effect of Preparation Design on Marginal Integrity and Fracture Resistance of Endocrowns: A Systematic Review
Abstract
Objectives: Endocrown restorations were introduced for endodontically treated teeth as a conservative treatment. However, data about the effect of preparation design on marginal integrity and fracture resistance of endocrowns are lacking. The purpose of this systematic review was to investigate the effect of preparation design of endocrown restorations on marginal integrity and fracture resistance.
Materials and Methods: Based on PICO question and the search terms, PubMed, Embase, Scopus, and the Cochrane Library were searched. After including studies matched to predefined inclusion and exclusion criteria, the extracted data were tabulated in a table provided by the authors. Two reviewers assessed the methodological quality of each included study independently. Ten articles were selected for extracting the quantitative data. All included studies were in vitro. The potential risk of bias of the selected studies was assessed using the modified MINORS scale.
Results: Four studies assessed the marginal adaptation, five studies evaluated the fracture resistance and just one investigated both the marginal integrity and fatigue resistance of the specimens. The evaluated influencing items in preparation design were as follows: cavity depth, occlusal thickness, ferrule effect, internal divergence angle, type of finish line, and adding vents inside pulp chamber. Meta-analysis could not be done due to heterogeneity of preparation designs and evaluation methods.
Conclusion: Marginal discrepancy of endocrowns is intensified with adding preparation features, higher cavity depth and increasing the divergence. Fracture resistance of endocrowns is increased with more occlusal reduction and cavity depth. However, it is still beyond the normal clinical force range.
1. Sedrez-Porto JA, Rosa WL, da Silva AF, Münchow EA, Pereira-Cenci T. Endocrown restorations: A systematic review and meta-analysis. J Dent. 2016 Sep;52:8-14.
2. Kanat-Ertürk B, Saridağ S, Köseler E, Helvacioğlu-Yiğit D, Avcu E, Yildiran-Avcu Y. Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials. Dent Mater J. 2018 Mar 30;37(2):256-265.
3. Mincik J, Urban D, Timkova S, Urban R. Fracture Resistance of Endodontically Treated Maxillary Premolars Restored by Various Direct Filling Materials: An In Vitro Study. Int J Biomater. 2016;2016:9138945.
4. Kassem IA, Farrag IE, Zidan SM, ElGuindy JF, Elbasty RS. Marginal gap and fracture resistance of CAD/CAM ceramill COMP and cerasmart endocrowns for restoring endodontically treated molars bonded with two adhesive protocols: an in vitro study. Biomater Investig Dent. 2020 Feb 25;7(1):50-60.
5. Halawani SM, Amer Al-Harbi S. Marginal adaptation of fixed prosthodontics. IJMDC. 2017; 1(2): 78-84.
6. Rekow ED, Silva NR, Coelho PG, Zhang Y, Guess P, Thompson VP. Performance of dental ceramics: challenges for improvements. J Dent Res. 2011 Aug;90(8):937-52.
7. Soares CJ, Celiberto L, Dechichi P, Fonseca RB, Martins LR. Marginal integrity and microleakage of direct and indirect composite inlays: SEM and stereomicroscopic evaluation. Braz Oral Res. 2005 Oct-Dec;19(4):295-301.
8. Hopp CD, Land MF. Considerations for ceramic inlays in posterior teeth: a review. Clin Cosmet Investig Dent. 2013 Apr 18;5:21-32.
9. Haralur SB, Alamri AA, Alshehri SA, Alzahrani DS, Alfarsi M. Influence of Occlusal Thickness and Radicular Extension on the Fracture Resistance of Premolar Endocrowns from Different All-Ceramic Materials. App Sci. 2020;10(8):2696.
10. Elagra ME. Endocrown preparation: Review. Int J Appl Dent Sci 2019;5(1):253-256.
11. Ghajghouj O, Taşar-Faruk S. Evaluation of Fracture Resistance and Microleakage of Endocrowns with Different Intracoronal Depths and Restorative Materials Luted with Various Resin Cements. Materials (Basel). 2019 Aug 8;12(16):2528.
12. de Kuijper MCFM, Cune MS, Tromp Y, Gresnigt MMM. Cyclic loading and load to failure of lithium disilicate endocrowns: Influence of the
restoration extension in the pulp chamber and the enamel outline. J Mech Behav Biomed Mater. 2020 May;105:103670.
13. Moher D, Liberati A, Tetzlaff J, Altman DG; PRISMA Group. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. PLoS Med. 2009 Jul 21;6(7):e1000097.
14. Gaintantzopoulou MD, El-Damanhoury HM. Effect of Preparation Depth on the Marginal and Internal Adaptation of Computer-aided Design/Computer-assisted Manufacture Endocrowns. Oper Dent. 2016 Nov/Dec;41(6):607-616.
15. Shin Y, Park S, Park JW, Kim KM, Park YB, Roh BD. Evaluation of the marginal and internal discrepancies of CAD-CAM endocrowns with different cavity depths: An in vitro study. J Prosthet Dent. 2017 Jan;117(1):109-115.
16. Dartora NR, de Conto Ferreira MB, Moris ICM, Brazão EH, Spazin AO, Sousa-Neto MD, et al. Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis. J Endod. 2018 Jul;44(7):1179-1185.
17. Taha D, Spintzyk S, Schille C, Sabet A, Wahsh M, Salah T, et al. Fracture resistance and failure modes of polymer infiltrated ceramic endocrown restorations with variations in margin design and occlusal thickness. J Prosthodont Res. 2018 Jul;62(3):293-297.
18. Einhorn M, DuVall N, Wajdowicz M, Brewster J, Roberts H. Preparation Ferrule Design Effect on Endocrown Failure Resistance. J Prosthodont. 2019 Jan;28(1):e237-e242.
19. Haralur SB, Alamrey AA, Alshehri SA, Alzahrani DS, Alfarsi M. Effect of different preparation designs and all ceramic materials on fracture strength of molar endocrowns. J Appl Biomater Funct Mater. 2020 Jan-Dec;18:2280800020947329.
20. Ghoul WE, Özcan M, Tribst JPM, Salameh Z. Fracture resistance, failure mode and stress concentration in a modified endocrown design. Biomater Investig Dent. 2020 Aug 7;7(1):110-119.
21. Topkara C, Keleş A. Examining the adaptation of modified endocrowns prepared with CAD-CAM in maxillary and mandibular molars: A microcomputed tomography study. J Prosthet Dent. 2022 May;127(5):744-749.
22. Darwish HA, Morsi TS, El Dimeery AG. Internal fit of lithium disilicate and resin nano-ceramic endocrowns with different preparation designs. Future Dental Journal. 2017;3(2):67-72.
23. Rocca GT, Daher R, Saratti CM, Sedlacek R, Suchy T, Feilzer AJ, et al. Restoration of severely damaged endodontically treated premolars: The influence of the endo-core length on marginal integrity and fatigue resistance of lithium disilicate CAD-CAM ceramic endocrowns. J Dent. 2018 Jan;68:41-50.
24. Hayes A, Duvall N, Wajdowicz M, Roberts H. Effect of Endocrown Pulp Chamber Extension Depth on Molar Fracture Resistance. Oper Dent. 2017 May/Jun;42(3):327-334.
25. Sakrana A, Al-Zordk W, elameen A. Impact of Marginal Preparation Design on the Fracture Resistance of Endo-Crown All-Ceramic. IOSR Journal of Dental and Medical Sciences. 2019;18:11-7.
26. Abo-Elmagd A, Abdel-Aziz M. Influence of marginal preparation design on microleakage and marginal gap of endocrown cemented with adhesive resin cement. Dental Journal. 2015;61(5481):5489.
27. Pedrollo Lise D, Van Ende A, De Munck J, Umeda Suzuki TY, Cardoso Vieira LC, Van Meerbeek B. Biomechanical behavior of endodontically treated premolars using different preparation designs and CAD/CAM materials. J Dent. 2017 Apr;59:54-61.
28. Slim K, Nini E, Forestier D, Kwiatkowski F, Panis Y, Chipponi J. Methodological index for non-randomized studies (minors): development and validation of a new instrument. ANZ J Surg. 2003 Sep;73(9):712-6.
29. Lander E, Dietschi D. Endocrowns: a clinical report. Quintessence Int. 2008 Feb;39(2):99-106.
30. Mörmann WH, Bindl A, Lüthy H, Rathke A. Effects of preparation and luting system on all-ceramic computer-generated crowns. Int J Prosthodont. 1998 Jul-Aug;11(4):333-9.
31. Otto T, Mörmann WH. Clinical performance of chairside CAD/CAM feldspathic ceramic posterior shoulder crowns and endocrowns up to 12 years. Int J Comput Dent. 2015;18(2):147-61.
32. Zhu J, Rong Q, Wang X, Gao X. Influence of remaining tooth structure and restorative material type on stress distribution in endodontically treated maxillary premolars: A finite element analysis. J Prosthet Dent. 2017 May;117(5):646-655.
33. Veneziani M. Posterior indirect adhesive restorations: updated indications and the Morphology Driven Preparation Technique. Int J Esthet Dent. 2017;12(2):204-230.
34. Fages M, Bennasar B. The endocrown: a different type of all-ceramic reconstruction for molars. J Can Dent Assoc. 2013;79:d140.
35. Govare N, Contrepois M. Endocrowns: A systematic review. J Prosthet Dent. 2020 Mar;123(3):411-418.e9.
36. Patel D, Invest JC, Tredwin CJ, Setchell DJ, Moles DR. An analysis of the effect of a vent hole on excess cement expressed at the crown-abutment margin for cement-retained implant crowns. J Prosthodont. 2009 Jan;18(1):54-9.
2. Kanat-Ertürk B, Saridağ S, Köseler E, Helvacioğlu-Yiğit D, Avcu E, Yildiran-Avcu Y. Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials. Dent Mater J. 2018 Mar 30;37(2):256-265.
3. Mincik J, Urban D, Timkova S, Urban R. Fracture Resistance of Endodontically Treated Maxillary Premolars Restored by Various Direct Filling Materials: An In Vitro Study. Int J Biomater. 2016;2016:9138945.
4. Kassem IA, Farrag IE, Zidan SM, ElGuindy JF, Elbasty RS. Marginal gap and fracture resistance of CAD/CAM ceramill COMP and cerasmart endocrowns for restoring endodontically treated molars bonded with two adhesive protocols: an in vitro study. Biomater Investig Dent. 2020 Feb 25;7(1):50-60.
5. Halawani SM, Amer Al-Harbi S. Marginal adaptation of fixed prosthodontics. IJMDC. 2017; 1(2): 78-84.
6. Rekow ED, Silva NR, Coelho PG, Zhang Y, Guess P, Thompson VP. Performance of dental ceramics: challenges for improvements. J Dent Res. 2011 Aug;90(8):937-52.
7. Soares CJ, Celiberto L, Dechichi P, Fonseca RB, Martins LR. Marginal integrity and microleakage of direct and indirect composite inlays: SEM and stereomicroscopic evaluation. Braz Oral Res. 2005 Oct-Dec;19(4):295-301.
8. Hopp CD, Land MF. Considerations for ceramic inlays in posterior teeth: a review. Clin Cosmet Investig Dent. 2013 Apr 18;5:21-32.
9. Haralur SB, Alamri AA, Alshehri SA, Alzahrani DS, Alfarsi M. Influence of Occlusal Thickness and Radicular Extension on the Fracture Resistance of Premolar Endocrowns from Different All-Ceramic Materials. App Sci. 2020;10(8):2696.
10. Elagra ME. Endocrown preparation: Review. Int J Appl Dent Sci 2019;5(1):253-256.
11. Ghajghouj O, Taşar-Faruk S. Evaluation of Fracture Resistance and Microleakage of Endocrowns with Different Intracoronal Depths and Restorative Materials Luted with Various Resin Cements. Materials (Basel). 2019 Aug 8;12(16):2528.
12. de Kuijper MCFM, Cune MS, Tromp Y, Gresnigt MMM. Cyclic loading and load to failure of lithium disilicate endocrowns: Influence of the
restoration extension in the pulp chamber and the enamel outline. J Mech Behav Biomed Mater. 2020 May;105:103670.
13. Moher D, Liberati A, Tetzlaff J, Altman DG; PRISMA Group. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. PLoS Med. 2009 Jul 21;6(7):e1000097.
14. Gaintantzopoulou MD, El-Damanhoury HM. Effect of Preparation Depth on the Marginal and Internal Adaptation of Computer-aided Design/Computer-assisted Manufacture Endocrowns. Oper Dent. 2016 Nov/Dec;41(6):607-616.
15. Shin Y, Park S, Park JW, Kim KM, Park YB, Roh BD. Evaluation of the marginal and internal discrepancies of CAD-CAM endocrowns with different cavity depths: An in vitro study. J Prosthet Dent. 2017 Jan;117(1):109-115.
16. Dartora NR, de Conto Ferreira MB, Moris ICM, Brazão EH, Spazin AO, Sousa-Neto MD, et al. Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis. J Endod. 2018 Jul;44(7):1179-1185.
17. Taha D, Spintzyk S, Schille C, Sabet A, Wahsh M, Salah T, et al. Fracture resistance and failure modes of polymer infiltrated ceramic endocrown restorations with variations in margin design and occlusal thickness. J Prosthodont Res. 2018 Jul;62(3):293-297.
18. Einhorn M, DuVall N, Wajdowicz M, Brewster J, Roberts H. Preparation Ferrule Design Effect on Endocrown Failure Resistance. J Prosthodont. 2019 Jan;28(1):e237-e242.
19. Haralur SB, Alamrey AA, Alshehri SA, Alzahrani DS, Alfarsi M. Effect of different preparation designs and all ceramic materials on fracture strength of molar endocrowns. J Appl Biomater Funct Mater. 2020 Jan-Dec;18:2280800020947329.
20. Ghoul WE, Özcan M, Tribst JPM, Salameh Z. Fracture resistance, failure mode and stress concentration in a modified endocrown design. Biomater Investig Dent. 2020 Aug 7;7(1):110-119.
21. Topkara C, Keleş A. Examining the adaptation of modified endocrowns prepared with CAD-CAM in maxillary and mandibular molars: A microcomputed tomography study. J Prosthet Dent. 2022 May;127(5):744-749.
22. Darwish HA, Morsi TS, El Dimeery AG. Internal fit of lithium disilicate and resin nano-ceramic endocrowns with different preparation designs. Future Dental Journal. 2017;3(2):67-72.
23. Rocca GT, Daher R, Saratti CM, Sedlacek R, Suchy T, Feilzer AJ, et al. Restoration of severely damaged endodontically treated premolars: The influence of the endo-core length on marginal integrity and fatigue resistance of lithium disilicate CAD-CAM ceramic endocrowns. J Dent. 2018 Jan;68:41-50.
24. Hayes A, Duvall N, Wajdowicz M, Roberts H. Effect of Endocrown Pulp Chamber Extension Depth on Molar Fracture Resistance. Oper Dent. 2017 May/Jun;42(3):327-334.
25. Sakrana A, Al-Zordk W, elameen A. Impact of Marginal Preparation Design on the Fracture Resistance of Endo-Crown All-Ceramic. IOSR Journal of Dental and Medical Sciences. 2019;18:11-7.
26. Abo-Elmagd A, Abdel-Aziz M. Influence of marginal preparation design on microleakage and marginal gap of endocrown cemented with adhesive resin cement. Dental Journal. 2015;61(5481):5489.
27. Pedrollo Lise D, Van Ende A, De Munck J, Umeda Suzuki TY, Cardoso Vieira LC, Van Meerbeek B. Biomechanical behavior of endodontically treated premolars using different preparation designs and CAD/CAM materials. J Dent. 2017 Apr;59:54-61.
28. Slim K, Nini E, Forestier D, Kwiatkowski F, Panis Y, Chipponi J. Methodological index for non-randomized studies (minors): development and validation of a new instrument. ANZ J Surg. 2003 Sep;73(9):712-6.
29. Lander E, Dietschi D. Endocrowns: a clinical report. Quintessence Int. 2008 Feb;39(2):99-106.
30. Mörmann WH, Bindl A, Lüthy H, Rathke A. Effects of preparation and luting system on all-ceramic computer-generated crowns. Int J Prosthodont. 1998 Jul-Aug;11(4):333-9.
31. Otto T, Mörmann WH. Clinical performance of chairside CAD/CAM feldspathic ceramic posterior shoulder crowns and endocrowns up to 12 years. Int J Comput Dent. 2015;18(2):147-61.
32. Zhu J, Rong Q, Wang X, Gao X. Influence of remaining tooth structure and restorative material type on stress distribution in endodontically treated maxillary premolars: A finite element analysis. J Prosthet Dent. 2017 May;117(5):646-655.
33. Veneziani M. Posterior indirect adhesive restorations: updated indications and the Morphology Driven Preparation Technique. Int J Esthet Dent. 2017;12(2):204-230.
34. Fages M, Bennasar B. The endocrown: a different type of all-ceramic reconstruction for molars. J Can Dent Assoc. 2013;79:d140.
35. Govare N, Contrepois M. Endocrowns: A systematic review. J Prosthet Dent. 2020 Mar;123(3):411-418.e9.
36. Patel D, Invest JC, Tredwin CJ, Setchell DJ, Moles DR. An analysis of the effect of a vent hole on excess cement expressed at the crown-abutment margin for cement-retained implant crowns. J Prosthodont. 2009 Jan;18(1):54-9.
| Issue | Vol 19 (Continuously Published Article-Based) | |
| Section | Review Article | |
| DOI | https://doi.org/10.18502/fid.v19i37.11250 | |
| Keywords | ||
| Crowns Tooth Preparation Prosthodontic Flexural Strength Dental Marginal Adaptation | ||
| Rights and permissions | |
|
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
How to Cite
1.
Mostafavi A, Allahyari S, Niakan S, Atri F. Effect of Preparation Design on Marginal Integrity and Fracture Resistance of Endocrowns: A Systematic Review. Front Dent. 2022;19.
