To compare the dentofacial effects of mandibular incisor intrusion using mini-implants with those of a conventional incisor intrusion mechanic, the utility arch. Materials and Methods: Twenty-six deep-bite patients were enrolled to one of the two groups. In group 1 the mandibular incisors were intruded using a 0.16 3 0.22-inch stainless-steel segmental wire connected to two mini-implants. In group 2 the mandibular incisor intrusion was performed using a conventional utility arch. Conventional lateral cephalometric radiographs were taken at pretreatment and at the end of intrusion. Thirty landmarks were identified to measure 23 linear and 20 angular measurements. Intragroup comparisons were made using a paired t-test or a Wilcoxon test. Intergroup comparisons were made using a Student's t-test or a Mann-Whitney U-test.Results: The duration of intrusion was 5 months for group 1 and 4 months for group 2. In the implant group, the mean amount of change was 0.4 mm/mo for the incisor tip and 0.3 mm/mo for the center of resistance, and in the utility arch group, the mean amount of change was 0.25 mm/mo for the incisor tip and 0.2 mm/mo for the center of resistance. The mandibular incisors showed an average protrusion of 7u in the implant group and 8u in the utility arch group. Conclusions: Incisor intrusion that was achieved using an implant-supported segmented archwire was no different than the movement achieved with a conventional intrusion utility arch. The only difference between the two methods was in the molar movement. ( Recently, several researchers 3,4 have focused on the effect of aging on anterior tooth display and on how treatment mechanics change the perception of age. Sarver and Ackerman 3 and Zachrisson 4 drew attention to the importance of lower incisor intrusion in deep-bite patients with reduced upper incisor display to preserving a youthful appearance.Lower incisor intrusion can be accomplished using different arches, such as a reverse Spee arch, 5 a three-piece intrusion arch, 6 or a utility arch. 7 Even though intrusion can be achieved successfully with all of these appliances, incisor proclination during intrusion and unwanted distal tipping on posterior anchorage teeth are inevitable.The use of temporary anchorage devices for lower incisor intrusion have been described in a few case reports, 8,9 and the effects were limited to the mandibular anterior area. In this prospective study, the effects of mandibular incisor intrusion achieved using a segmented arch and two miniscrews were evaluated a Private Practice, Edirne, Turkey.

Mandibular distraction with intraoral curvilinear distractor is an effective procedure for lengthening the mandibular corpus and ramus dimensions. Mandibular distractor is valuable for the treatment of hypoplastic mandible. The aim of this article was to describe the treatment of a patient with hypoplastic and severely retrognathic mandible resulting from isolated Pierre Robin sequence, by means of curvilinear distraction osteogenesis followed by fixed orthodontic treatment. As a result, the curvilinear path of distraction can form a new mandibular angle and bring the mandible significantly forward. Attention should be given for the stability of the treatment results.