Comparison of Intrusion Effects on Maxillary Incisors Among Mini Implant Anchorage, J-Hook Headgear and Utility Arch

Abstract

Background: Intrusion of maxillary incisors is one of the most important and difficult tooth movements to achieve as a part of orthodontic therapy. A variety of techniques were used in the past to intrude the maxillary incisors before the emergence of mini implants in Orthodontics. Mini implants are temporary anchorage devices used to produce various tooth movements. The research was carried out to evaluate and compare the efficiency of producing intrusion of maxillary incisors using mini implants, utility arch and j-hook headgear.

Effectiveness of miniscrew-supported maxillary incisor intrusion in deep-bite correction: A systematic review and meta-analysis

“…Less extrusive molar movement was noted in the miniscrew group (SMD, À0.86; 95% CI, À1.46 to À0.27; 95% PrI, À3.2 to 1.5; I 2 , 68%; tau 2 , 0.61; 6 RCTs; Figure 4). In one small RCT, 19 the amount of extrusion of the maxillary molars was not statistically significant between the J-HG group and the miniscrew group, with a mean difference of 0.2 mm (P ¼ .5).…”

“…A statistically significant SMD was noted favoring a higher amount of deep-bite reduction in the miniscrew group when compared with the intrusion arch group (SMD, À0.48; 95% CI, À0.89 to À0.07; 95% PrI, À1.45 to 0.49; I 2 , 24%; tau 2 , 0.05; 5 RCTs; Figure 2). One small study 19 compared the amount of deepbite correction between the miniscrews and J-HG. A statistically significant mean difference of À1.5 mm (P ¼ .025) was deduced favoring improved reduction in the deep bite for the miniscrew group.…”

“…Seven parallel-group RCTs were included in this review. [17][18][19][20][21][22][23] All included RCTs were conducted in university settings, with the exception of one study. 22 Studies included a total of 202 treated patients with an age range mostly falling between 15 and 22 years.…”

“…Only eight participants were analyzed as part of the J-HG group in one study. 19 All studies used a similar amount of applied force level in the intervention as well as the comparative groups. Applied forces ranged between 30-50 g per side.…”

Comparison of Vertical Parameters in Correction of Deep Bite Using ANS Implant And Utility Intrusion Arch

“…The appliances for incisor intrusion include utility arch by Ricketts, Burstone intrusion arch, Connecticut intrusion arch, and J-hook headgear. 4 Also, recently, many authors have demonstrated the use of mini implants and have reported statistically significant amounts of incisor intrusion with them. 4, , , , Despite the advantages and quick improvements with these treatment options, disadvantages prevail.…”