Fogorvosi szemle, 2017 (110. évfolyam, 1-4. szám)
2017-06-01 / 2. szám
42 FOGORVOSI SZEMLE ■ 110. évf. 2. sz. 2017. 15. Kyung SH, Hong SG, Park YC: Distalization of maxillary molars with a midpalatal screw. J Clin Orthod 2003; 37: 22-26. 16. Lundskog J: Heat and bone tissue. An experimental investigation of the thermal properties of bone and threshold levels for thermal injury. Scand J Plast Reconstr Surg 1972; 9: 1-80. 17. Matsuoka M, Motoyoshi M, Sakaguchi M, Shinohara A, ShigeedeT, Saito Y: Friction heat during self-drilling of an orthodontic miniscrew. Int J Oral Maxillofac Surg 2011 ; 40: 191-194. 18. Okhyun N, Wonjae Y, Man YC, Hee-Moon K: Monitoring of Bone Temperature During Osseous Preparation for Orthodontic Micro- Screw Implants: Effect of Motor Speed and Pressure. Key Engin Mat 2006; 321-323: 1044-1047. 19. Paik CH, Woo YJ, Boyd RL: Treatment of an adult patient with vertical maxillary excess using miniscrew fixation. J Clin Orthod 2003; 37: 423-428. 20. Pandey RK, Panda SS: Drilling of bone. A comprehensive review. J Clin Orthop Trauma 2013; 4: 15-30. 21. Papageorgiou SN, Zogakis IP, Papadopoulos MA: Failure rates and associated risk factors of orthodontic miniscrew implants A metaanalysis. Am J Orthod Dentofacial Orthop 2012; 142: 577-595. 22. Park HS, Kwon OW, Sung JH: Micro-implant anchorage for forced eruption of impacted canines. J Clin Orthod 2004; 38: 297-302. 23. Park HS, Kwon TG: Sliding mechanics with microscrew implant anchorage. Angle Orthod 2004; 74: 703-710. 24. Proffit WR, Fields HW, Sarver DM: Contemporary orthodontics. (5th ed.) St. Louis, Mosby 2013; 295-299. 25. Reingewirtz Y, Szmukler-Moncler S, Senger B: Influence of different parameters on bone heating and drilling time in implantology. Clin Oral Implants Res 1997; 8: 189-197. 26. Sherwood KH, Burch JG, Thompson WJ: Closing anterior open bites by intruding molars with titanium miniplate anchorage. Am J Orthod Dentofacial Orthop 2002; 122: 593-600. 27. Tachibana R, Motoyoshi M, Shinohara A, Shigeeda T, Shimizu N: Safe placement techniques for self-drilling orthodontic mini-implants. Int J Oral Maxillofacial Surg 2012; 41: 1439-1444. 28. Tehemar SH: Factors affecting heat generation during implant site preparation: a review of biologic observations and future considerations. Int J Oral Maxillofac Implants 1999; 14: 127-136. 29. Weng D, Jacobson Z, Tarnow D, HCirzeler MB, Faehn O, Sanavi F és mtsai: A prospective multi-center clinical trial of 3i machinedsurface implants: Results after 6 years of follow-up. Int J Oral Maxillofac Implants 2003; 18: 417-423. 30. Winkler S, Morris HF, Ochi S: Implant survival to 36 months as related to length and diameter. Ann Periodontol 2000; 5: 22- SI. 31. Wu TY, Kuang SH, Wu CH: Factors Associated with the stability of mini-implants for orthodontic anchorage: A study of 414 samples in Taiwan. J Oral Maxillofac Surg 2009; 67: 1595-1599. G u fi dán Z, Szalma J The effect of pre-cooling of the orthodontic miniscrew on the in vitro intraosseous heat production. Orthodontic miniscrews can be applied safely for skeletal anchorage during orthodontic treatments. During manual insertion of self-drilling miniscrews, heat may be expected, which can be harmful to the bone. The aim of the authors was to determine the intraosseous temperatures produced both with room temperature and pre-cooled mini screws. 1.6 x 8 mm miniscrews were placed into porcine ribs with -2 mm cortical thickness with the help of the manual wrench while temperature changes were registered using thermocouple sensors. For the pre-cooled screws, the adapter and the screws were placed into commercially available refrigerator before measurements. The temperature differences of the two procedures i.e. room temperature vs. refrigerated screw placements were compared using the two-sample t-test. The average temperature increase in the bone was significantly higher (AT = 11,3°C) when a room temperature miniscrew was applied than during the insertion of the pre-cooled miniscrew (AT = 6,6 °C). The intraosseous temperature values of this in vitro study, during manual insertion of orthodontic miniscrews showed clearly, that pre-cooling can significantly reduce bone temperatures, which may reduce complications originating from overheating of the bone. Keywords: mini screw, sceletal anchorage, temperature increase, bone damage
