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EFFECT OF A COUNTER-TORQUE DEVICE AND THE INTERNAL HEXAGON OF ABUTMENT ON THE TIGHTENING TORQUE TRANSMITTED TO THE IMPLANT  

Lee Sang-Min (Department of Prosthodontics, College of Dentistry, Pusan National University)
Jeon Young-Chan (Department of Prosthodontics, College of Dentistry, Pusan National University)
Jeong Chang-Mo (Department of Prosthodontics, College of Dentistry, Pusan National University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.41, no.2, 2003 , pp. 223-231 More about this Journal
Abstract
Statement of problem : Little is known about the effect of a counter-torque device and the internal hexagon of abutment on the tightening torque transmitted to the implant. Purpose : The purpose of this study was to examine the effect of a counter-torque device and the internal hexagon of abutment on the tightening torque transmitted to the implant. Material and Methods : In this study, three types of abutment were used, (1) two-piece conical abutment with hexagon, (2) two-piece conical abutment without hexagon, and (3) one-piece conical abutment without hexagon. The experimental groups were divided into five groups according to the type of abutment and the usage of a counter-torque device. Group I : two-piece conical abutment with internal hexagon was tightened without the use of a counter-torque device. Group II : two-piece conical abutment without internal hexagon was tightened without the use of a counter-torque device. Group III : one-piece conical abutment without internal hexagon was tightened without the use of a counter-torque device. Group IV : two-piece conical abutment with internal hexagon was tightened with the use of a counter-torque device Group V : two-piece conical abutment without internal hexagon was tightened with the use of a counter-torque device. Abutments were tightened 20Ncm torque with the use of manual torque wrench and then torque values were measured by torque-gauge. After the measurement of torque values, all groups were loosened with the use of manual torque wrench and then detorque values were measured by torque-gauge. Results : The results were as follows. 1. There were no differences in torque values among three types of abutment. 2. Regardless of the existence of the internal hexagon of abutment, a counter-torque device decreased the tightening torque transmitted to the implant about 92% 3. In group III showed the highest detorque value, however there were no differences among group I, II, IV and V. Conclusion : Within the limitations of this study, it was concluded that the internal hexagon of abutment has no effect on the tightening torque transmitted to the implant and the detorque value of abutment screw. The use of a counter-torque device is essential to prevent microfracture on the implant-bone interface but has no effect on preload.
Keywords
Counter-torque device; Internal hexagon; Tightening torque;
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1 Zarb GA, Schmitt A. The longitudinal clinical effectiveness of osseointegrated dental implants: the Tronto study. Part I: Surgical results. J Prosthet Dent 1990;63:451-457
2 Zarb GA, Schmitt A. The longitudinal clinical effectiveness of osseointegrated dental implants: the Tronto study. Part III: Problems and complications encountered. J Prosthet Dent 1990:64:185-194
3 Kallus T, Bessing C. Loose gold screws frequently occur in full-arch fixed prostheses supported by osseointegrated implants after 5 years. Int J Oral Maxillofac Implants 1994;9:169-178   PUBMED
4 Henry PJ, Laney WR, Jemt T. Krogh PHJ, Polizzi G, Zarb GA, Herrmann I. Osseointegrated implants for single-tooth replacement a prospective 5-year multicenter study. Int J Oral Maxillofac Implants 1996;11:450-455
5 Patterson EA, Johns RB. Theoretical analysis of the fatigue life of fixture screws in osseointegrated dental implants. Int J Oral Maxillofac Implants 1992:7:26-34
6 Haack JE, Sakaguchi RL, Sun T. Coffey JP. Elongation and preload stress in dental implant abutment screws. Int J Oral Maxillofac Implants 1995;10:529-536   PUBMED
7 English. CE. Externally hexed implants, abutments. and transfer device: A comprehensive overview. Implant Dent 1992;1:273-282   DOI
8 Goheen KL, Vermilyea SG, Vossoughi J, Agar JR. Torque generated by handheld screwdrivers and mechanical torquing devices for osseointegrated implants. Int J Oral Maxillofac Implants 1994;9:149-155   PUBMED
9 Carlsson L. Avoiding the pitfalls of torque measuring. Nobelpharma News 1992;1:5
10 Carr AB, Larsen PE, Papazoglou E, McGlumphy E. Reverse torque failure of screw-shaped implants in baboons: Baseline data for abutment torque application. Int J Oral Maxillofac Implants 1995;10;167-174
11 Branemark R, Ohrnell LO, Skalak R, Carlsson L, Branemark PI. Biomechanical characterization of osseointegration : An experimental in vivo investigation in the beagle dog. J Orthop Res 1998;16:61-69   DOI   ScienceOn
12 Hwang BY, Kim YS, Kim CW. Study of screw loosening in cementation type implant abutment. J Koran Acad Prosthodont 2000;38:765-781   과학기술학회마을
13 Binon PP. Evaluation of machining accuracy and consistency of selected implants, standard abutments, and laboratory analogs. Int J Prosthodont 1995;8:162-178   PUBMED
14 McGlumphy EA, Mendel DA, Holloway JA. Implant screw mechanics. Dent Clin North Am 1988;42:71-89
15 Weiss EI, Kozak D, Gross MD. Effect of repeated closures on opening torque values in seven abutment-implant systems. J Prosthet Dent 2000;84:194-199   DOI   ScienceOn
16 Sullivan DY, Sherwood RL, Collins TA, Krogh PH. The reverse-torque test: A clinical report. Int J Oral Maxillofac Implants 1996;11:179-185   PUBMED
17 Avivi-Arber L, Zarb GA. Clinical effectiveness of implant-supported single tooth replacement: the Toronto Study. Int J Oral Maxillofac Implants 1996;11:311-321   PUBMED
18 Cibirka RM, Nelson SK, Lang BR, Rueggeberg FA. Examination of the implant-abutment interface after fatigue testing. J Prosthet Dent 2001;85:268-275   DOI   ScienceOn
19 Bickford JH. An introduction to the design and behavior of bolted joints. New York, NY: Marcel Dekker, Inc: 1981
20 Gross M, Kozak D, Laufer BZ, Weiss EI. Manual closing torque in five implant abutment systems: An in vitro comparative study. J Prosthet Dent 1999:81:574-578
21 Darle C, Jorneus L, Rangert B. Screw loosening & hexagonal play. Nobel Biocare Talk of the times 1998:15-19
22 Lang LA, May KB, Wang RF. The effect of the use of a counter-torque device on the abutment-implant complex. J Prosthet Dent 1999:81:411-417
23 Albrektsson T. A multicenter report on osseointegrated oral implants. J Prosthet Dent 1988;60:75-84   DOI   PUBMED   ScienceOn
24 Binon PP. The effect of implant/abutment hexagonal misfit on screw joint stability. Int J Prosthodont 1996;9:149-160   PUBMED
25 Lang LA, Wang RF, May KB. The influence of abutment screw tightening on screw joint configuration. J Prosthet Dent 2002;87:74-79   DOI   ScienceOn
26 Tan KB, Nicholls JI. The effect of 3 torque delivery systems on gold screw preload at the gold cylinder-abutment screw joint. Int J Oral Maxillofac Implants 2002;17:175-183   PUBMED
27 Laney WR, Jemt T, Harris D, Henry PJ, Krogh PH, Polizzi G, Zarb GA,Herrmann I. Osseointegrated implants for single tooth replacement: progress report from a multicenter prospective study after 3 years. Int J Oral Maxillofac Implants 1994;9:49-54   PUBMED
28 Carlson B, Jonsson G, Sandahl L, Nordin T,Hising P, Nelvig P, Branting C. A 1-year clinical report of a one-piece implant abutment. Int J Prosthodont 2001;14:159-163   PUBMED
29 Zarb GA, Schmitt A. The longitudinal clinical effectiveness of osseointegrated dental implants: the Tronto study. Part II: The prosthetic results. J Prosthet Dent 1989;64:53-61
30 Misch CE. Principles for screw-retained prostheses. in: Misch CE. Contemporary implant dentistry. 2nd ed., Missouri: CV Mosby; 1999. pp575-593
31 Ivanoff CJ, Sennerby L, Lekholm U. Reintegration of mobilized titanium implants. An experimental study in rabbit tibia. Int J Oral Maxillofac Surg 1997;26:310-315   DOI   ScienceOn
32 Hemmings KW, Schmitt A, Zarb GA. Complications and maintenance requirements for fixed prostheses and overdentures in the edentulous mandibles: A 5-year report. Int J Oral Maxillofac Implants 1994;9:191-196   PUBMED
33 Binon P, Sutter F, Beaty K, Brunski J,Gulbransen H, Weiner R. The role of screws in implant systems. Int J Oral Maxillofac Implants 1994:9(suppl);48-63
34 Standlee JP, Caputo AA. Accuracy of an electric torque-limiting device for implants. Int J Oral Maxillofac Implants 1999;14:278-281   PUBMED
35 Sakaguchi RL, Borgersen SE. Nonlinear contact analysis of preload in dental implant screws.Int J Oral Maxillofac Implants 1995;10:295-302   PUBMED