Browse > Article
http://dx.doi.org/10.4047/jkap.2009.47.1.29

Three-dimensional finite element analysis for the effect of retentive groove design on joint strength of casting connection  

Kim, Jung-Woo (Department of Dentistry, Graduate School, Pusan National University)
Jeong, Chang-Mo (Department of Dentistry, Graduate School, Pusan National University)
Jeon, Young-Chan (Department of Dentistry, Graduate School, Pusan National University)
Yun, Mi-Jung (Department of Dentistry, Graduate School, Pusan National University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.47, no.1, 2009 , pp. 29-38 More about this Journal
Abstract
Statement of problem: A casting connection technique is widely used for repair, correction and addition to base metal framework. However, a casting connection technique may increase the risk of failure in clinical situations when high stresses exist. Purpose: The purpose of this study was to investigate the mechanical retentive groove design comparatively to increase the joint strength by using the three-dimensional finite element analysis model of a 3-unit fixed partial denture. Material and methods: Ten finite element models were constructed. (Model A: One retentive groove, Model B: Two retentive grooves, Model C: Three retentive grooves, Model D: Four retentive grooves, Model E: One horizontal groove and two vertical grooves, Model F: Two horizontal grooves and one vertical groove, Model G: One groove with the enlarged dimension, Model H: Two grooves with the enlarged dimension, Model I: One groove with the increased height, Model J: One groove with the increased width of base). The vertical force was applied to the mesial and the distal fossa to the casting connection of mandibular first molar. Results: The main factors, affecting joint strength of casting connection were both the retention between the primary cast and the secondary cast and the thickness of the primary cast remaining after preparing retentive groove. The increase of retentive force, according to the numbers and the dimension of retentive groove had an effect on distributing stress. However, in some cases, the increase of retentive force resulted in the increase of stress by reducing thickness of the primary cast in the connection area. Conclusion: The design of retentive groove that limits number of retentive groove for metal thickness and increases the depth of retentive groove for retention is highly recommended.
Keywords
Casting connection; Retentive groove; Joint strength; Three-dimensional finite element analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Minagi S, Tanaka T, Sato T, Matsunaga T. Double-casting method for fixed prosthodontics with functionally generated path. J Prosthet Dent 1998;79:120-4.   DOI   ScienceOn
2 Fehling AW. Cast connectors as cores for ceramometal pontics on removable partial dentures and for splinting anterior crowns. J Prosthet Dent 1990;63:167-71.   DOI   ScienceOn
3 Smyd ES. Dental engineering. J Dent Res 1948;27:649-60.   DOI
4 Yang HS, Lang LA, Felton DA. Finite element stress analysis on the effect of splinting in fixed partial dentures. J Prosthet Dent 1999;81:721-8.   DOI   ScienceOn
5 Benzing UR, Gall H, Weber H. Biomechanical aspects of two different implant-prosthetic concepts for edentulous maxillae. Int J Oral Maxillofac Implants 1995;10:188-98.   PUBMED   ScienceOn
6 Thoupos GA, Zouras CS, Winkler S, Roussos VG. Connecting implant framework segments. Implant Dent 1995;4:97-9.   DOI   PUBMED   ScienceOn
7 Wheeler RC. Dental anatomy, Physiology and occlusion. 6th ed. Philadelphia;WB Saunders; 1984. pp. 184-287.
8 Goel VK, Khera SC, Gurusami S, Chen RC. Effect of cavity depth on stresses in a restored tooth. J Prosthet Dent 1992;67:174-83.   DOI   ScienceOn
9 Fehling AW, Sansom BP, Meiser ET, Johnson PF. Cast connectors: an alternative to soldering base metal alloys. J Prosthet Dent 1986;55:195-7   DOI   ScienceOn
10 Rabinowicz E. Friction and wear of materials. 2nd ed. John Wiley & Sons Inc.;1995. pp. 117.
11 McCartney JW, Pearson R. Stabilization investment template for direct casting connection of implant framework segments. J Prosthet Dent 1997;78:106-8.   DOI   ScienceOn
12 Weiss PA, Munyon RE. Repairs, corrections and additions to non-precious ceramo-metal frameworks (II). Quintessence Dent Technol 1980;4:45-58.   PUBMED   ScienceOn
13 Howell AH, Manly RS. An electronic strain gauge for measuring oral forces. J Dent Res 1948;27:705-12.   DOI
14 DeHoff PH, Anusavice KJ, Evans J, Wilson HR. Effectiveness of cast-joined Ni-Cr-Be structures. Int J Prosthodont 1990;3:550-4.   PUBMED   ScienceOn
15 Khera SC, Goel VK, Chen RC, Gurusami SA. A three-dimensional finite element model. Oper Dent 1988;13:128-37.   PUBMED   ScienceOn
16 Jeong CM. Effect of the undercut in retention grooves on flexure strength of cast-joined connector with Ni-Cr-Be alloy. J Pusan National University Hospital 2000;8:221-7.
17 Zoidis PC, Winkler S, Karellos ND. The effect of soldering, electrowelding, and cast-to procedures on the accuracy of fit of cast implant bars. Implant Dent 1996;5:163-8.   DOI   PUBMED   ScienceOn
18 Romero GG, Engelmeier R, Powers JM, Canterbury AA. Accuracy of three corrective techniques for implant bar fabrication. J Prosthet Dent 2000;84:602-7.   DOI   PUBMED   ScienceOn
19 Jeong CM, Lee HY. A finite element stress analysis of the stress distribution and the shock absorption in an osseointegrated implant-natural tooth supported fixed partial denture. J Korean Acad Prosthodont 1992;30:582-610.   과학기술학회마을   ScienceOn
20 Seol YH, Jeong CM, Jeon YC, Kang SW. Fit of implant frameworks fabricated by one-piece casting, laser welding, soldering, and electric discharge machining. J Korean Acad Prosthodont 2002;40:156-71.   과학기술학회마을   ScienceOn
21 Jeong CM, Jeon YC, Lim JS. Flexure strength of castjoined connector with Ni-Cr-Be alloy. J Korean Acad Prosthodont 1998;36:858-66.   과학기술학회마을
22 Son HO, Lee TJ, Jeong JH, et al. Dental anatomy. 5th ed. Seoul:Jeesung Publishing Inc.;2001. pp. 151-7, 179-92
23 Farah JW, Craig RG, Meroueh KA. Finite element analysis of three- and four-unit bridges. J Oral Rehabil 1989;16:603-11.   DOI   PUBMED
24 Bertolotti RL, Napolitano LH. Strength of cast-joined nonprecious alloy frameworks. J Dent Res 1984;63(special issue): 208(abstr no. 334).
25 Morris HF. Veterans Administration Cooperative Studies Project No. 147/242. Part VII: The mechanical properties of metal ceramic alloys as cast and after simulated porcelain firing. J Prosthet Dent 1989;61:160-9.   DOI   ScienceOn
26 Carranza FA. Glickman’s clinical periodontology. 7th ed.Philadelphia;WB Saunders; 1990. pp. 47-8.