open access
메뉴
open access
메뉴
ISSN : 0376-4672
Purpose : The purpose of this study was to evaluate the effect of amount of cantilever in intra-crown according to implant fixture position on mechanical strength of internal conical joint type implant. Materials and Methods : Internal conical joint type implant fixture, abutment screw, abutment was connected and gold alloy prostheses were fabricated and cemented on abutment. For fatigue fracture test, the specimens were loaded to the 350 N, 2,000,000 cycle on 3, 4, 5, and 6 mm off-center of gold alloy prostheses. The fracture pattern of implant component was observed. Results : No fatigue fracture found on 3 and 4 mm group. But initial crack pattern found on 3 specimens of 4 mm group. Fatigue fracture found on all specimens of 5 mm group. But complete fracture was not observed. One specimen of 6 mm group fracture completely. Implant fixture fracture wax not observed. Conclusion : The mechanical failure of implant prostheses increased with the loading area farther from center of implant fixture. To reduce mechanical problem of internal joint type implant, surgical and prosthetic consideration is needed..
1. Brånemark PI. Osseointegration and its experimental back-ground. J Prosthet Dent 1983; 50:399-410.
2. Brånemark PI, Adell R, Breine U, Hansson BO, Lindström J, Ohlsson A. Intra-osseous anchorage of dental prostheses. I. Experimental studies. Scand J Plast Reconstr Surg 1969; 3:81-100.
3. Jemt T. Multicenter study of overdentures supported by Brånemark. Int J Oral Maxillofac Implants 1992; 7:513-22.
4. Rangert B, Jemt T, Jörneus L. Forces and moments on Brånemark implants. Int J Oral Maxillofac implants 1989; 4:241-7.
5. Richter EJ. Basic biomechanics of dental implants in prosthetic dentistry. J Prosthet Dent 1989; 61:602-9.
6. Van Rossen IP, Braak LH, de Putter C, de Groot K. Stress-absorbing elements in dental implants. J Prosthet Dent 1990; 64:198-205.
7. Weinberg LA. Kruger B. Biomechanical considera tions when combining tooth-supported and implantsupported prostheses. Oral Surg Oral Med Oral Pathol 1994; 78:22-7.
8. McGlumphy EA, Mendel DA, Holloway JA. Implant Screw Mechanics. Dent Clinics North Am 1998; 42:71-89.
9. Balshi TJ. An analysis and management of fractured implants. Int J Oral Maxillofac Implants 1996; 11:660-6.
10. Morgan MJ, James D, Pillar RM. Fractures of the fixture component of an osseointegrated implant. Int J Oral Maxillofac Implants 1993; 8:409-14.
11. Norton MR. An in vitro evaluation of the strenght of an internal conical interface compared to a butt joint interface in implant design. Clin Oral Impl Res 1997; 8:290-8.
12. Linkow LI, Donath K, Lemons JE. Retrieval analysis of a blade implant after 231 months of clinical function. Implant Dent 1992; 1:37-43.
13. Levine RA, Clem DS 3rd, Wilson TG Jr, Higginbottom F, Solnit G. Multicenter retrospective analysis of the ITI implant system used for singletooth replacements: results of loading for 2 or more years. Int J Oral Maxillofac Implants 1999; 14:516-20.
14. Maeda Y, Satoh T, Sogo M. In vitro differences of stress concentrations for internal and external hex implant-abutment connections: a short communi cation. J Oral Rehabil 2006; 33:75-8.
15. Pieri F, Aldini NN, Marchetti C, Corinaldesi G. Influence of implant-abutment interface design on bone and soft tissue levels around immediately placed and restored single-tooth implants: a randomized controlled clinical trial. Int J Oral Maxillofac Implants 2011; 26:169-78.
16. Merz BR, Hunenbart S, Belser UC. Mechanics of the implant-abutment connection: a 8-degree taper compared to abutt joint connection. Int J Oral Maxillofac Implants 2000; 15:519-26.
17. ISO/FDIS 14801 Dentistry-fatigue test for endosseous dental implants, Internal Organization for Standardization, 2003(E).
18. Kirkwood WF, Feng WW, Scott RG, Streit RD, Goldberg A. Mechanical properties and science of engineering materials. In: Blake A[ed]. Handbook of Mechanics, Materials and Structures. London:Wiley, 1985: 320-8.
19. Leempoel PJB, Van’s Hof MA, De Haan AFJ. Survival studies of restorations: Criteria, Methods and analyses. J Oral Rehabil 1989; 16:387-94.
20. Richter EJ. In vivo vertical forces on implants. Int J Oral Maxillofac Implants 1995; 10:99-108.
21. Carlsson GE, Haraldson T. Functional response. In:Brånemark PI. Zarb GA, Albreksson T. (Eds) Tissue intergrated prostheses. Osseointegration in clinical dentisty. 4th ed. Chicago; Quintessence; 1986 :74-8.
22. Craig RG. Restorative Dental Materials 6th ed. St. Louis; Mosby;1980: 60-1.
23. Ban JH, Shin SW, Kim SJ, Lee JY. Threedimensional finite element analysis on stress distribution of the mandibular implant-supported cantilever prostheses depending on the designs. J Korean Acad Prosthodont 2009; 47:70-81.
24. Lee HS, Kim MR, Park JM, Kim SJ. A 3-dimensional finite element analysis of tapered internal connection implant system (Avana SS Ⅲ ) on different abutment connection. J Korean Acad Prosthodont 2010; 48:181-8.
25. Rangert B, Krogh PH, Langer B, Van Roekel N. Bending overload and implant fracture; a retrospective clinical analysis. Int J Oral Maxillofac Implants 1995; 10:326-34.
26. Kwon JH, Choi, MH, Kim YL, Cho HW. Threedimensional finite element stress analysis of single implant restoration using different fixture and abutment screw diameters, J Korean Acad Prosthodont 2005; 43:105-19.