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DOI: 10.1055/s-0039-1697349
Evaluation of Different Post Lengths’ Effect on Fracture Resistance of a Glass Fiber Post System
Publikationsverlauf
Publikationsdatum:
26. September 2019 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00042133/200801/lookinside/thumbnails/10-1055s-0039-1697349_00023-1.jpg)
ABSTRACT
Objectives: The purpose of this in vitro study was to evaluate the influence of different post lengths upon root fracture resistance.
Methods: 78 maxillary central teeth with similar dimensions were mounted in acrylic blocks with artificial silicone periodontal ligaments. Combinations of post lengths of 6 mm (shorter than 1/1 clinical crown length), 9 mm (1/1 clinical crown length), and 12 mm (longer than 1/1 clinical crown length) made up 6 different groups consisting of 13 teeth each. The glass fiber posts (Snowpost) were cemented with Super-Bond C&B and Panavia F luting cement. Composite-resin cores were made with Clearfil PhotoCore. The specimens were tested in a universal test machine. The testing machine applied controlled loads to the core, 2 mm from its incisal edge, on the palatal side at an angle 135 degrees to the long axis of the root. The testing machine was set at a crosshead speed of 5mm per minute. All samples were loaded until failure.
Results: There was no statistically significant difference between cements (P>.05). Posts shorter than clinical crown length, demonstrated root fracture under significantly lower loading forces (P<.05).
Conclusion: Usage of posts shorter than clinical crowns should be avoided to eliminate clinical failure. (Eur J Dent 2008;2:23-28)
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REFERENCES
- 1 Reeh ES, Messer HH, Douglas WH. Reduction in tooth stiffness as a result of endodontic and restorative procedures. J Endod 1989; 15: 512-516
- 2 Sorensen JA, Engelman MJ. Ferrule design and fracture resistance of endodontically treated teeth. J Prosthet Dent 1990; 63: 529-536
- 3 Sedgley CM, Messer HH. Are endodontically treated teeth more brittle?. J Endodon 1992; 18: 332-335
- 4 Carter JM, Sorensen SE, Johnson RR, Teitelbaum RL, Levine MS. Punch shear testing of extracted vital and endodontically treated teeth. J Biomech 1983; 16: 841-848
- 5 Hudis SI, Goldstein GR. Restoration of endodontically treated teeth: a review of the literature. J Prosthet Dent 1986; 55: 33-38
- 6 Plasmans PJ, Welle PR, Vrijhoef MM. In vitro resistance of composite resin dowel and cores. J Endod 1988; 14: 300-304
- 7 Assif D, Gorfil C. Biomechanical considerations in restoring endodontically treated teeth. J Prosthet Dent 1994; 71: 565-567
- 8 DeSort KD. The prosthodontic use of endodontically treated teeth: theory and biomechanics of post preparation. J Prosthet Dent 1983; 49: 203-206
- 9 Kern SB, von Fraunhofer JA, Mueninghoff LA. An in vitro comparison of two dowel and core techniques for endodontically treated molars. J Prosthet Dent 1984; 51: 509-514
- 10 Goldberg AJ, Burstone CJ. The use of continuous fiber reinforcement in dentistry. Dent Mater 1992; 8: 197-202
- 11 Sirimai S, Riis DN, Morgano SM. An in vitro study of the fracture resistance and the incidence ofvertical root fracture of pulpless teeth restored with six post-and-coresystems. J Prosthet Dent 1999; 81: 262-269
- 12 Eskitascioglu G, Belli S, Kalkan M. Evaluation of two post core systems using two different methods (fracture strength test and a finite elemental stress analysis). J Endod 2002; 28: 629-633
- 13 Sorensen JA, Engelman MJ. Effect of post adaptation on fracture resistance of endodontically treated teeth. J Prosthet Dent 1990; 64: 419-424
- 14 King PA, Setchell DJ. An in vitro evaluation of a prototype CFRC prefabricated post developed for the restoration of pulpless teeth. J Oral Rehabil 1990; 17: 599-609
- 15 Purton DG, Love RM. Rigidity and retention of carbon fiber versus stainless steel root canal posts. Int Endod J 1996; 29: 262-265
- 16 Ferrari M, Vichi A, Grandini S. Efficacy of different adhesive techniques on bonding to root canal walls: an SEM investigation. Dent Mater 2001; 17: 422-429
- 17 Kalkan M, Usumez A, Ozturk AN, Belli S, Eskitascioglu G. Bond strength between root dentin and three glass-fiber post systems. JProsthetDent 2006; 96: 41-46
- 18 Goodacre CJ, Kan JYK. Restoration of endodontically treated teeth. In: Ingle JI, Bakland LK. ed. Endodontics. London: BC Decker Inc.; 2002: 922
- 19 Assif D, Bitenski A, Pilo R, Oren E. Effect of post design on resistance to fracture of endodontically treated teeth with complete crowns. J Prosthet Dent 1993; 69: 36-40
- 20 Isidor F, Odman P, Brandum K. Intermittent loading of teeth restored using prefabricated carbon fiber posts. Int J Prosthodont 1996; 9: 131-136
- 21 Cobankara FK, Ungor M, Belli S. The effect of two different root canal sealers and smear layer on resistance to root fracture. J Endod 2002; 28: 606-609
- 22 Lauer HC, Ottl P, Weigl P. Mechanical load-bearing capacity of various post-and-core systems. Dtsch Zahnarztl Z 1994; 49: 985-985
- 23 Ottl P, Hahn L, Lauer CH, Fay M. Fracture characteristics of carbon fibre, ceramic and non-palladium endodontic post systems at monotonously increasing loads. J Oral Rehabil 2002; 29: 175-183
- 24 Hu YH, Pang LC, Hsu CC, Lau YH. Fracture resistance of endodontically treated anterior teeth restored with four post-and-core systems. Quintessence Int 2003; 34: 349-353
- 25 Newman MP, Yaman P, Dennison J, Rafter M, Billy E. Fracture resistance of endodontically treated teeth restored with composite posts. J Prosthet Dent 2003; 89: 360-367
- 26 Alaçam T. Endodonti. Ankara: Barṣ yayınları; 2000
- 27 Adanir N, Belli S, Eraslan O, Eskitascioglu G. Bir cam fiber post sistemiyle restore edilmiṣ üst birinci kesici diṣ modelinde post uzunluḡunun fonksiyonel kuvvetler altinda oluṣan stress daḡılımına etkisi. Türk Dişhekimliği Dergisi 2005; 59: 8-12
- 28 Nissan J, Dmitry Y, Assif D. The use of reinforced composite resin cement as compensation for reduced post length. J Prosthet Dent 2001; 86: 304-308
- 29 Braga NM, Paulino SM, Alfredo E, Sousa-Neto MD, Vansan LP. Removal resistance of glass-fiber and metallic cast posts with different lengths. J Oral Sci 2006; 48: 15-20
- 30 Yang HS, Lang LA, Molina A, Felton DA. The effects of dowel design and load dirction on dowel-and-core restorations. J Prosthet Dent 2001; 85: 558-67
- 31 Kvist T, Rydin E, Reit C. The relative frequency of periapical lesions in teeth with root canal-retained posts. J Endod 1989; 15: 578-580
- 32 Goodacre CJ, Kan JYK. Restoration of endodontically treated teeth. In: Ingle JI, Bakland LK. ed. Endodontics. London: BC Decker Inc.; 2002: 928