Comparison of Insertion Torque and Pull-Out Strength between Custom-Made Miniscrews and Commercial Miniscrews
Keywords:
Orthodontic miniscrews, Primary stability, Maximum insertion torque, Pull-out strengthAbstract
Custom-made orthodontic miniscrews are clearly different in characteristic components compared with imported commercial miniscrews. Their primary stability have not been well studied. The objective of this study was to compare the primary stability of the custom-made miniscrews with those of the commercial miniscrews. The primary stability was focused on maximum insertion torque and pull-out strength. Two types of miniscrew were used in this study; 20 miniscrews of each. Each miniscrew was inserted perpendicularly into a pig rib embedded in a self-cured acrylic block. Maximum insertion torque was measured using a torque wrench. To measure pull-out strength using a universal testing machine, the pulling force was directed perpendicularly to the bone surface and parallel to the miniscrew axis. The data was statistically compared using univariable linear regression analysis (P<0.05). The results showed that mean maximum insertion torque of the custom-made miniscrews (23.3±4.0 N.cm) was significantly greater than that of the commercial miniscrews (17.4±3.6 N.cm) (P<0.001), while mean pull-out strength of the custom-made miniscrews (277.9±51.2 N) was insignificantly less than that of the commercial miniscrews (284.9±70.3 N). In conclusion, the custom-made miniscrews are superior to the imported commercial miniscrews due to greater primary stability. The custom-made miniscrews are a good and affordable alternative for orthodontic use in Thailand.
References
Somchai M, Somporn R. Dentists acceptance towards the use of mini-implant as temporary implant anchorage. J Thai Assoc Orthod 2005; 4: 40-6.
Ohmae M, Saito S, Morohashi T, Seki K, Qu H, Kanomi R, et al. A clinical and histological evaluation of titanium mini-implants as anchors for orthodontic intrusion in the beagle dog. Am J Orthod Dentofacial Orthop 2001; 119: 489-97.
Florvaag B, Kneuertz P, Lazar F, Koebke J, Zoller JE, Braumann B, et al. Biomechanical properties of orthodontic miniscrews. An in-vitro study. J Orofac Orthop 2010; 71: 53-67.
Bae SM, Park HS, Kyung HM, Kwon OW, Sung JH. Clinical application of micro-implant anchorage. J Clin Orthod 2002; 36: 298-302.
Sarinporn T, Sirinan A, Yugo SE, Boonsiva S. Trends in miniscrew implant design and use for orthodontic anchorage : a systematic literature review. J Thai Assoc Orthod 2008; 7: 34-44.
Chen Y, Shin HI, Kyung HM. Biomechanical and histological comparison of self-drilling and self-tapping orthodontic microimplants in dogs. Am J Orthod Dentofacial Orthop 2008; 133: 44-50.
Migliorati M, Drago S, Schiavetti I, Olivero F, Barberis F, Lagazzo A, et al. Orthodontic miniscrews: an experimental campaign on primary stability and bone properties. Eur J Orthod 2015; 37: 531-8.
Ivanoff CJ, Sennerby L, Lekholm U. Influence of initial implant mobility on the integration of titanium implants. An experimental study in rabbits. Clin Oral Implants Res 1996; 7: 120-7.
Motoyoshi M, Matsuoka M, Shimizu N. Application of orthodontic mini-implants in adolescents. Int J Oral Maxillofac Surg 2007; 36: 695-9.
Chang JZ, Chen YJ, Tung YY, Chiang YY, Lai EH, Chen WP, et al. Effects of thread depth, taper shape, and taper length on the mechanical properties of mini-implants. Am J Orthod Dentofacial Orthop 2012; 141: 279-88.
Gracco A, Giagnorio C, Incerti Parenti S, Alessandri Bonetti G, Siciliani G. Effects of thread shape on the pullout strength of miniscrews. Am J Orthod Dentofacial Orthop 2012; 142: 186-90.
Morarend C, Qian F, Marshall SD, Southard KA, Grosland NM, Morgan TA, et al. Effect of screw diameter on orthodontic skeletal anchorage. Am J Orthod Dentofacial Orthop 2009; 136: 224-9.
Pickard MB, Dechow P, Rossouw PE, Buschang PH. Effects of miniscrew orientation on implant stability and resistance to failure. Am J Orthod Dentofacial Orthop 2010; 137: 91-9.
Lim SA, Cha JY, Hwang CJ. Insertion torque of orthodontic miniscrews according to changes in shape, diameter and length. Angle Orthod 2008; 78: 234-40.
Motoyoshi M, Hirabayashi M, Uemura M, Shimizu N. Recommended placement torque when tightening an orthodontic mini-implant. Clin Oral Implants Res 2006; 17: 109-14.
Shah AH, Behrents RG, Kim KB, Kyung HM, Buschang PH. Effects of screw and host factors on insertion torque and pullout strength. Angle Orthod 2012; 82: 603-10.
Lai TT, Chen MH. Factors affecting the clinical success of orthodontic anchorage: Experience with 266 temporary anchorage devices. J Dent Sci 2014; 9: 49-55.
Lim HJ, Choi YJ, Evans CA, Hwang HS. Predictors of initial stability of orthodontic miniscrew implants. Eur J Orthod 2011; 33: 528-32.
Kim YK, Kim YJ, Yun PY, Kim JW. Effects of the taper shape, dual-thread, and length on the mechanical properties of mini-implants. Angle Orthod 2009; 79: 908-14.
O’Sullivan D, Sennerby L, Meredith N. Influence of implant taper on the primary and secondary stability of osseointegrated titanium implants. Clin Oral Implants Res 2004; 15: 474-80.
Cha JY, Takano-Yamamoto T, Hwang CJ. The effect of miniscrew taper morphology on insertion and removal torque in dogs. Int J Oral Maxillofac Implants 2010; 25: 777-83.
Yoo SH, Park YC, Hwang CJ, Kim JY, Choi EH, Cha JY. A comparison of tapered and cylindrical miniscrew stability. Eur J Orthod 2014; 36: 557-62.
Migliorati M, Signori A, Silvestrini-Biavati A. Temporary anchorage device stability: an evaluation of thread shape factor. Eur J Orthod 2012; 34: 582-6.
Migliorati M, Benedicenti S, Signori A, Drago S, Barberis F, Tournier H, et al. Miniscrew design and bone characteristics: an experimental study of primary stability. Am J Orthod Dentofacial Orthop 2012; 142: 228-34.
Brinley CL, Behrents R, Kim KB, Condoor S, Kyung HM, Buschang PH. Pitch and longitudinal fluting effects on the primary stability of miniscrew implants. Angle Orthod 2009; 79: 1156-61.
Meursinge Reynders RA, Ronchi L, Ladu L, van EttenJamaludin F, Bipat S. Insertion torque and success of orthodontic mini-implants: a systematic review. Am J Orthod Dentofacial Orthop 2012; 142: 596-614.e5.
Chaddad K, Ferreira AF, Geurs N, Reddy MS. Influence of surface characteristics on survival rates of mini-implants. Angle Orthod 2008; 78: 107-13.
Wang Z, Zhao Z, Xue J, Song J, Deng F, Yang P. Pullout strength of miniscrews placed in anterior mandibles of adult and adolescent dogs: a microcomputed tomographic analysis. Am J Orthod Dentofacial Orthop 2010; 137: 100-7.
Yano S, Motoyoshi M, Uemura M, Ono A, Shimizu N. Tapered orthodontic miniscrews induce bone-screw cohesion following immediate loading. Eur J Orthod 2006; 28: 541-6.
Wilmes B, Panayotidis A, Drescher D. Fracture resistance of orthodontic mini-implants: a biomechanical in vitro study. Eur J Orthod 2011; 33: 396-401.
Poggio PM, Incorvati C, Velo S, Carano A. “Safe Zones”: a guide for miniscrew positioning in the maxillary and mandibular arch. Angle Orthod 2006; 76: 191-7.
Chaimanee P, Suzuki B, Suzuki EY. “Safe Zones” for miniscrew implant placement in different dentoskeletal patterns. The Angle Orthodontist 2011; 81: 397-403.
Liou EJ, Pai BC, Lin JC. Do miniscrews remain stationary under orthodontic forces? Am J Orthod Dentofacial Orthop 2004; 126: 42-7.
Liu Y-J, Sar JIC, Chen Y-Y, Chiang Y-Y, Lai EH-H, Chen W-P, et al. Mechanical properties of temporary anchorage device. J Dent Sci 2015; 10: 68-73.
Holm L, Cunningham SJ, Petrie A, Cousley RR. An in vitro study of factors affecting the primary stability of orthodontic mini-implants. Angle Orthod 2012; 82: 1022-8.
Hou SM, Hsu CC, Wang JL, Chao CK, Lin J. Mechanical tests and finite element models for bone holding power of tibial locking screws. Clin Biomech 2004; 19: 738-45.
Chapman JR, Harrington RM, Lee KM, Anderson PA, Tencer AF, Kowalski D. Factors affecting the pullout strength of cancellous bone screws. J Biomech Eng 1996; 118: 391-8.
Cheng SJ, Tseng IY, Lee JJ, Kok SH. A prospective study of the risk factors associated with failure of mini-implants used for orthodontic anchorage. Int J Oral Maxillofac Implants 2004; 19: 100-6.
Suzuki EY, Suzuki B. Placement and removal torque values of orthodontic miniscrew implants. Am J Orthod Dentofacial Orthop 2011; 139: 669-78.
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