Effect of Crown Height on the Screw Stability of Titanium Screw-Retained Crowns.
Height
implant crown
screw
Journal
Journal of prosthodontics : official journal of the American College of Prosthodontists
ISSN: 1532-849X
Titre abrégé: J Prosthodont
Pays: United States
ID NLM: 9301275
Informations de publication
Date de publication:
Jul 2021
Jul 2021
Historique:
pubmed:
6
3
2021
medline:
3
7
2021
entrez:
5
3
2021
Statut:
ppublish
Résumé
The aim of this in vitro study was to evaluate the effect of crown height on the screw stability of screw-retained titanium implant crowns subjected to cyclic loading conditions. Twenty-one implants with internal hex connections were placed in epoxy resin holders. Mandibular first molar screw-retained titanium implant crowns with UCLA type, crown-abutment connections were CAD/CAM fabricated. Seven crowns of 3 different heights (6 mm, 10 mm, and 14 mm) were made. The crowns were seated onto the implants and screws were tightened to 30 Ncm. The implants were clamped into holders and stepwise cyclic loads were applied to the occlusal surface at 30-degree angles to the long axes of the crowns. The detorque values were measured after each 5 million cycles. Before increasing the applied load, the crowns were secured with new screws and tightened to 30 Ncm. Failure times, survival estimates and detorque values were then analyzed. (alpha = 0.05). Crown height did not significantly affect detorque values. However, five 14-mm crowns failed with varying fractures during the 475 N loading condition. Overall, a significantly lower survival for 14 mm crowns was found compared to 6 mm and 10 mm crowns (p = 0.004). Crown heights of one-piece screw-retained titanium implant crowns did not significantly affect detorque values. Screw fracture, however, was greater for crown height of 14 mm than those of 6 mm and 10 mm.
Substances chimiques
Dental Implants
0
Titanium
D1JT611TNE
Types de publication
Journal Article
Langues
eng
Pagination
515-519Informations de copyright
© 2021 by the American College of Prosthodontists.
Références
Lee A, Okayasu K, Wang HL: Screw-versus cement-retained implant restorations: current concepts. Implant Dent 2010;19:8-15
Misch CE: Implant design considerations for the posterior regions of the mouth. Implant Dent 1999;8:376-386
English CE: Biomechanical concerns with fixed partial dentures involving implants. Implant Dent 1993;2:221-242
Nissan J, Gross O, Ghelfan O, et al.: The effect of splinting implant-supported restorations on stress distribution of different crown-implant ratios and crown height spaces. J Oral Maxillofac Surg 2011;69:2990-2994
Misch CE, Goodacre CJ, Finley JM, et al. : Consensus conference panel report: crown-height space guidelines for implant dentistry-part 2. Implant Dent 2006;15:113-121
Misch CE, Goodacre CJ, Finley JM, et al. : Consensus conference panel report: crown-height space guidelines for implant dentistry-part 1. Implant Dent 2005;14:312-318
Moraes SL, Pellizzer EP, Verri FR, et al. : Three-dimensional finite element analysis of stress distribution in retention screws of different crown-implant ratios. Comput Methods Biomech Biomed Engin 2015;18: 689-696
deMoraes SL, Verri FR, Santiago JF Jr, et al. : A 3-D finite element study of the influence of crown-implant ratio on stress distribution. Braz Dent J 2013;24:635-641
Alkan I, Sertgoz A, Ekici B: Influence of occlusal forces on stress distribution in preloaded dental implant screws. J Prosthet Dent 2004;91:319-325
Romanos GE, Gupta B, Eckert SE: Distal cantilevers and implant dentistry. Int J Oral Maxillofac Implants 2012;27:1131-1136
Hebel KS, Gajjar RC: Cement- retained versus screw-retained implant restorations: achieving optimal occlusion and esthetics in implant dentistry. J Prosthet Dent 1997;77:28-35
Parein AM, Eckert SE, Wollan PC, et al.: Implant reconstruction in the posterior mandible: a long-term retrospective study. J Prosthet Dent 1997;78:34-42
Johansson LA, Ekfeldt A: Implant- supported fixed partial prostheses: a retrospective study. Int J Prosthodont 2003;16:172-176
Ekfeldt A, Eriksson A, Johansson LA: Stability of the screw joints in patients with implant-supported fixed prostheses in edentulous jaws: a 1-year follow-up study. Int J Prosthodont 2004;17:177-180
McGlumphy EA, Mendel DA, Holloway JA: Implant screw mechanics. Dent Clin North Am 1998;42:71-89
Jemt T, Laney WR, Harris D, et al.: Osseointegrated implants for single tooth replacement: a 1-year report from a multi- center prospective study. Int J Oral Maxillofac Implants 1991;6:29-36
Arnetzl GV, Payer M, Falkensammer F, et al. : Effect of double conical abutment screw on implant preload. Clin Oral Implants Res 2016 ;27:553-557
Lang LA, Kang B, Wang RF, et al. : Finite element analysis to determine implant preload. J Prosthet Dent 2003;90:539-546
Salvi GE, Brägger U: Mechanical and technical risks in implant therapy. Int J Oral Maxillofac Implants 2009;24:69-85
Urdaneta RA, Rodriguez S, McNeil DC, et al. : The effect of increased crown-to-implant ratio on single-tooth locking-taper implants. Int J Oral Maxillofac Implants 2010;25:729-743
Verri FR, Batista VE, Santiago JF Jr, et al. : Effect of crown-to-implant ratio on peri-implant stress: a finite element analysis. Mater Sci Eng C Mater Biol Appl 2014;45:234-240
Bidez MW, Misch CE: Force transfer in implant dentistry: basic concepts and principles. J Oral Implantol 1992;18:264-274
Kwan N, Yang S, Guillaume D, et al. : Resistance to crown displacement on a hexagonal implant abutment. Implant Dent 2004;13:112-119
International Organization for Standardization - ISO Norm 14801. Dentistry fatigue test for endosseous dental implants. Geneva: 2007.
Wiskott HW, Nicholls JI, Belser UC: Fatigue resistance of soldered joints: a methodological study. Dent Mater 1994;10:215220
Rosentritt M, Behr M, Gebhard R, et al. : Influence of stress simulation parameters on the fracture strength of all-ceramic fixed-partial dentures. Dent Mater 2006;22:176-182
Gratton DG, Aquilino SA, S CM: Micromotion and dynamic fatique properties of the dental implant-abutment interface. J Prosthet Dent 2001;85:47-52
Cibirka RM, Nelson SK, Lang BR, et al. : Examination of the implant-abutment interface after fatique testing. J Prosthet Dent 2001;85:268-275
Clelland N, Chaudhry J, Rashid RG, et al. : Split-mouth comparison of splinted and nonsplinted prostheses on short implants: 3-year results. Int J Oral Maxillofac Implants 2016;31:1135-1141
Fabbri G, Fradeani M, Dellificorelli G, et al. : clinical evaluation of the influence of connection type and restoration height on the reliability of zirconia abutments: a retrospective study on 965 abutments with a mean 6-year follow-up. Int J Periodontics Restorative Dent 2017;37:19-31
Kim KS, Lim YJ, Kim MJ, et al. : Variation in the total lengths of abutment/implant assemblies generated with a function of applied tightening torque in external and internal implant-abutment connection. Clin Oral Implants Res 2011;22:834-839
Iinuma T, Arai Y, Takayama M, et al. : Association between maximum occlusal force and 3-year all-cause mortality in community-dwelling elderly people. BMC Oral Health 2016;16:82
Hagberg C. Assessment of bite force: a review. J Craniomandib Disord 1987;1:162-169