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dc.contributor.authorIverson, Dennis B.en_US
dc.date.accessioned2018-10-31T16:07:34Z
dc.date.available2018-10-31T16:07:34Z
dc.date.issued1972
dc.date.submitted1972
dc.identifier.other16126616
dc.identifier.otherb14341797
dc.identifier.urihttps://hdl.handle.net/2144/31837
dc.descriptionThesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1972 (Orthodontics)en_US
dc.descriptionBibliography included.en_US
dc.description.abstractThe present study was undertaken to compare the efficiency of three different biomechanical mechanisms in preserving mandibular molar anchorage. Thirty-five patients were treated with intercanine coil, lip bumper, 9r mandibular cervical traction through the end of cuspid retraction. Midtreatment cephalograms were then taken. Superimposition of these midtreatment cepbalograms with the pretreatment cephalograms provided the author with the net mesial or distal movement of the mandibular first molar in each case. The data obtained from each case was accordingly placed in the appropriate biomechanical group. Each group was then statistically related to one another by means of the Mann-Whitney U Test. It was found that a stastically significant difference existed between lower cervical traction and the intercanine coil. The confidence level obtained (P < .02) indicated that less than two cases out of a hundred had a chance of coming from the same population. This data also showed a mean increase in mandibular anchorage with lower cervical traction ( +.062 mm. gained) indicating that there may be very good possibilities for this system to be used in orthodontic cases when anchorage is of a critical nature.en_US
dc.language.isoen_US
dc.publisherBoston Universityen_US
dc.rightsThis work is being made available in OpenBU by permission of its author, and is available for research purposes only. All rights are reserved to the author.en_US
dc.subjectOrthodontics, correctiveen_US
dc.subjectOrthodontic appliancesen_US
dc.titleComparative anchorage maintenance between the intercanine coil, lip bumper, and mandibular cervical traction during cuspid retractionen_US
dc.typeThesis/Dissertationen_US
etd.degree.nameMaster of Science in Dentistryen_US
etd.degree.levelmastersen_US
etd.degree.disciplineOrthodonticsen_US
etd.degree.grantorBoston Universityen_US


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