Fogorvosi szemle, 1999 (92. évfolyam, 1-12. szám)

1999-05-01 / 5. szám

tsumoto, M.: The effects on the maxillary complex induced by the quadhelix appliance — measurement by strain gauges. J. Japanese Orthod. Soc. 42, 442, 1983. b. Krebs, A. A.: Expansion of mid palatal suture studied by means of metallic implants. Acta Odontol. Scand. 17, 491-501. 1959. c. Krebs, A. A.: Midpalatal suture expansion studied by the implant method over a seven year period. Trans Eur. Orthod. Soc. 40, 131-142, 1964. - 22. Molnár Gy., Dénes J., Végh A.: A Burstone-féle szegmentív technika. Fogorv Szle. 88, 59, 1995. — 23. Moyers, R. E.: Orthodontics 4th Edition. Year Book medical Publishers, INC. Chicago 1988. - 24. Radóczy В., Werner P., Domokos Gy., Balogh M., Dénes J.: A fogívszűkületek kezelése módosított „quad-helix” készülékkel. Fogorv. Szle, 79, 268, 1986. — 25. Ranta, R.: Treatment of unilateral posterior crossbite: comparison of the quad-helix and removable plate. J. Dent Child. 55, 102, 1988. — 26. Ranta, R. : Orthodontic treatment in adults with cleft lip and palate. J. Craniomaxillofac. Surg. 17, Suppl: 1, 42, 1989. - 27. Rickets, R. M.:Growth prediction. Part 2. J. Clin. Orthod. 9, 340, 1975. — 28. Rickets, R. M., Bench, R. W., Gugino, C. F., Hilgers, J. J., Schulhof R. J.: Bioprogressive Therapie. 2. Auflage, Dr Alfred Hüthig Verlag GmbH, Heidelberg 305, 1988. - 29. Snow, M. D.: A removable quadhelix appliance for upper or lower arches. Aust. Orthod. J. 8, 41, 1983. - 30. Simon, P. W.: System einer biologischnechanischen Therapie der Gebissanomalien. Hermann Mausser Verlag Berlin, 1933. — 31. Tinlund, R. s., Rygh, P. : Soft- tissue profile changes during widening and protraction of the maxilla in patients with cleft lip and palate compared with cleft lip and palate compared with normal growth and development. Cleft-palata-craniofac. J. 30, 454, 1993. 32. Tenti, F. V.: Atlas of orthodontic appliances. CARAVEL s.a.s. Genova, 89, 1984. - 33. Thomas, G, G., Bell, R. A., Mitchell, R.: Experimentally determined forces of maxillary lingual arch expansion appliances J. Pedodont. 7, 3, 1982. - 34. Urbaniak, J. A., Brantley, W. A., Pruhs, R. J., Zussman, R. L., Post, A. C.: Effects of appliance size, arch wire diameter and alloy composition on the in vitro force delivery of the quad-helix appliance. Am. J. Orthod. Dentofacial Orthop. 94, 311, 1988. - 35. West, V. C.: The Cricket appliance. J. Clin Orthod. 18, 806, 1984.

Dr. Végh, A., dr. Dénes, Zs., dr. Razouk, G., dr. Dénes, J.: The development and effect-mechanism of quadhelix in the orthodontic treatment

Authors present a historical review of the development of quadhelix appliance. In conclusion, slow maxillary expansion with the quadhelix appliance provides an alternative approach to rapid maxillary expansion that is particularly beneficial for correction of transverse and arch-length discrepancies during the mixed dentition. There are numerous indications for this approach with two major advantages. First, a lower force that is within the elastic limits of maxillary sutural and periodontal tissue is generated. Second, a low separation rate of 0.4-1.1 mm per week allows for more physiologic adaptation to the expansion that may result in a more stable correction with less sutural relapse. The quadhelix is a versatile appliance that provides practitioners a convenient means to normalize developing malocclusions.

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