Mini-implants and the efficiency of Herbst treatment: a preliminary study

Abstract

BackgroundThe purpose of this study is to present the use of a modified Herbst appliance in association with temporary anchorage devices (TADs) in order to enhance the correction of skeletal class II malocclusions.MethodsTen consecutive adolescents scheduled for Herbst treatment were assigned to two treatment groups. Five cases were treated with a modified miniscrew-supported Herbst appliance (experimental group (EG)) and five cases with a conventional cast Herbst appliance (control group (CG)). In all cases, the Herbst was kept in place for 9 months and was followed by fixed appliances until class I relationships were achieved. The initial (T1) and final (T2) lower incisor inclination on lateral headfilms were analyzed for each case, and the mean increase for the five EG patients and the five CG patients were compared.ResultsThe mean increase in lower incisor inclination at the end of treatment was 1° (range 0° to 2°) for the EG and 7° (range 4° to 10°) for the CG.ConclusionsThe rational association of TADs with the Herbst appliance can optimize treatment efficiency and skeletal response by reducing the occurrence of excessive lower incisor proclination.

Treatment effects of skeletally anchored Forsus FRD EZ and Herbst appliances: A retrospective clinical study

“…Those studies have proven the efficiency of fixed functional appliances; however, protrusion of mandibular incisors was also reported to be a common finding that limits the skeletal effects of the appliance used. 16,17 The use of miniscrew and miniplate anchorage in orthodontics has reduced the undesirable effects of many appliances. [18][19][20][21] Few studies 16,17,22,23 have shown the use of the Herbst and Forsus Fatigue Resistant Device (FRD) with miniscrew anchorage.…”

“…16,17 The use of miniscrew and miniplate anchorage in orthodontics has reduced the undesirable effects of many appliances. [18][19][20][21] Few studies 16,17,22,23 have shown the use of the Herbst and Forsus Fatigue Resistant Device (FRD) with miniscrew anchorage. Those studies 16,22,23 have shown that the skeletal response to the Herbst appliance was increased by minimizing the protrusion of the mandibular incisors, while the overjet and molar correction in patients treated with the Forsus FRD combined with miniscrew anchorage were totally dentoalveolar.…”

“…[18][19][20][21] Few studies 16,17,22,23 have shown the use of the Herbst and Forsus Fatigue Resistant Device (FRD) with miniscrew anchorage. Those studies 16,22,23 have shown that the skeletal response to the Herbst appliance was increased by minimizing the protrusion of the mandibular incisors, while the overjet and molar correction in patients treated with the Forsus FRD combined with miniscrew anchorage were totally dentoalveolar. 17 Recently, a skeletal Class II malocclusion was successfully treated using the Forsus FRD appliance with miniplate anchorage bilaterally inserted in the mandibular symphyses.…”

Camouflage-Behandlung eines Patienten mit skelettaler Klasse-II-Anomalie mittels M.A.R.A-Apparatur und kortikaler Verankerung

“…Zur Minimierung unerwünschter Nebenwirkungen gewinnen in der modernen Kieferorthopädie zunehmend kortikale Verankerungssysteme an Bedeutung. Diese Verankerungsschrauben bieten erstmals eine Methode der Verankerung, ohne reziproke Kräfte auf andere dentale Einheiten zu übertragen [8]. Die hier vorgestellte Methode soll die Möglichkeiten der modernen Kieferorthopädie am Beispiel einer Erwachsenenbehandlung ohne kieferchirurgische Umstellungsosteotomie im Sinne einer Camouflage-Behandlung aufzeigen.…”

Comparative study of the effects of the fixed functional appliances forsus fatigue resistant device and MARA in treatment of class II malocclusion through lateral cephalograms analysis

“…8 Many studies have proven the efficiency of Herbst for the treatment of Class II malocclusion [9][10][11][12] , however, some authors have attributed several side effects to the use of functional appliances -eg, protrusion of mandibular incisors. 8,13 Nowadays, the Forsus Fatigue Resistant device (3M Unitek, Monrovia, California) is a new fixed semirigid system, where its producer guarantees to be resistant against fractures and external forces. 14 The FRD is a threepiece, semirigid telescoping system incorporating a superelastic nickel-titanium coil spring that can be assembled chair-side in a relatively short amount of time.…”