Comparison of success rates of orthodontic mini-screws by the insertion method

Abstract

ObjectiveThe aim of this study was to compare the success rates of the manual and motor-driven mini-screw insertion methods according to age, gender, length of mini-screws, and insertion sites.MethodsWe retrospectively reviewed 429 orthodontic mini-screw placements in 286 patients (102 in men and 327 in women) between 2005 and 2010 at private practice. Age, gender, mini-screw length, and insertion site were cross-tabulated against the insertion methods. The Cochran-Mantel-Haenszel test was performed to compare the success rates of the 2 insertion methods.ResultsThe motor-driven method was used for 228 mini-screws and the manual method for the remaining 201 mini-screws. The success rates were similar in both men and women irrespective of the insertion method used. With respect to mini-screw length, no difference in success rates was found between motor and hand drivers for the 6-mm-long mini-screws (68.1% and 69.5% with the engine driver and hand driver, respectively). However, the 8-mm-long mini-screws exhibited significantly higher success rates (90.4%, p < 0.01) than did the 6-mm-long mini-screws when placed with the engine driver. The overall success rate was also significantly higher in the maxilla (p < 0.05) when the engine driver was used. Success rates were similar among all age groups regardless of the insertion method used.ConclusionsTaken together, the motor-driven insertion method can be helpful to get a higher success rate of orthodontic mini-screw placement.

Selecting the Proper Screw for the Case: Review

“…da bu konuda benzer sonuçlar bulmuşlardır. 46 Bunların dışında mini vida, çevresindeki osteointegrasyon primer stabiliteyi etkileyebilmektedir. Osteointegrasyon; implant ve kemik arasında yumuşak-doku olmaksızın implant yüzeyi ile kemik arasındaki direkt bağlantı olarak tanımlan-makta ve eksternal-kuvvetlerin kemiğe direkt iletilmesini sağlamaktadır.…”

Effects of wobbling angle on the stability measures of orthodontic mini-implants during insertion and removal procedures

“…[5][6][7] However, this method requires space for equipment and expensive instruments. Moreover, it is difficult to obtain the proper tactile sensation and to monitor the insertion angle during the insertion procedure.…”

“…It can also provide better tactile sensation when the OMI tip contacts the alveolar bone, and it also allows for confirmation of the insertion orientation. 7 However, it is difficult to obtain the appropriate insertion torque, maintain the proper rotational speed, or access the palate or the most posterior area of the buccal attached gingiva in the mouth with a hand driver. 7 Crismani et al, 8 in a systemic review on the success rates of OMI placement, reported an average success rate of 83.6%.…”

“…7 However, it is difficult to obtain the appropriate insertion torque, maintain the proper rotational speed, or access the palate or the most posterior area of the buccal attached gingiva in the mouth with a hand driver. 7 Crismani et al, 8 in a systemic review on the success rates of OMI placement, reported an average success rate of 83.6%. Regarding the success rates of manual and motor insertion methods, Kim et al 7 reported that the success rate of the motor insertion method was significantly higher than that of the manual insertion method (84.6% vs 69.2%; P , .001).…”

“…7 Crismani et al, 8 in a systemic review on the success rates of OMI placement, reported an average success rate of 83.6%. Regarding the success rates of manual and motor insertion methods, Kim et al 7 reported that the success rate of the motor insertion method was significantly higher than that of the manual insertion method (84.6% vs 69.2%; P , .001).…”