Anchorage Provided during Intra-arch Distal Molar Movement: a Comparison between the Nance Appliance and a Fixed Frontal Bite Plane

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Anchorage Provided during Intra-arch Distal Molar Movement: a Comparison between the Nance Appliance and a Fixed Frontal Bite Plane

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dc.contributor.author Bondemark, Lars
dc.contributor.author Thorneus, Johan
dc.date.accessioned 2006-10-25T16:04:38Z
dc.date.available 2006-10-25T16:04:38Z
dc.date.issued 2005
dc.identifier.citation 437-43 en
dc.identifier.issn 0003-3219
dc.identifier.uri http://hdl.handle.net/2043/2992
dc.description.abstract The aim of this retrospective study was to evaluate and compare the anchorage provided with the Nance appliance (NA) and the fixed frontal bite plane (FBP) during intra-arch distal molar movement. After a sample size calculation, 20 patients were recruited and randomly selected for each group from patients who fulfilled the following criteria: use of an intra-arch Ni-Ti coil appliance with either NA or FBP to provide anchorage during a six-month molar distalization period, no orthodontic treatment before molar distalization, and first and second maxillary molars in occlusion. The outcome measures assessed were anchorage loss, ie, anterior movement of maxillary central incisors, distal movement of maxillary molars, and bite opening effect. The mean age in the NA group was 14.7 years (SD 1.09) and in the FBP group 15.0 years (SD 0.99). The data revealed that the maxillary central incisors moved anteriorly 1.4 mm in the NA group and 1.9 mm in the FBP group. The difference in anchorage loss was not significant. The mean amount of molar distalization within the maxilla was 1.7 mm in the NA group and 1.8 mm in the FBP group. In both groups, the overbite was significantly reduced and the overbite was decreased significantly more in the FBP group. Because neither the NA nor FBP provided stable anchorage, a second treatment phase is recommended to reverse the anchorage loss after distal molar movement. If molar distalization is planned in deep bite cases, the FBP is the anchorage system of choice. en
dc.language.iso eng en
dc.subject.classification Medicine en
dc.title Anchorage Provided during Intra-arch Distal Molar Movement: a Comparison between the Nance Appliance and a Fixed Frontal Bite Plane en
dc.type Article, other scientific en
dc.identifier.paperprint 0 en
dc.contributor.department Malmö University. Faculty of Odontology en
dc.subject.srsc Research Subject Categories::ODONTOLOGY
dc.relation.ispartofpublication Angle orthodontist;3 en
dc.relation.ispartofpublicationvolume 75 en
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