{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T17:03:25Z","timestamp":1780074205621,"version":"3.54.0"},"reference-count":26,"publisher":"The Angle Orthodontist (EH Angle Education & Research Foundation)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2012,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective:<\/jats:title>\n                    <jats:p>To evaluate the effects of quad-helix treatment on the eruption pattern of maxillary second molars in patients with maxillary incisor crowding.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>The lateral cephalograms of 40 consecutively treated patients in the early mixed-dentition group (treatment group) were examined in comparison with those of the same number of untreated patients with a similar form of malocclusion (control group). The cephalograms of the treated patients were taken at the start (T0) and at the end (T1) of treatment, and those of the untreated patients were also taken at about the same time as T0 and T1. The mean ages at T0 and T1 in the two groups were about the same.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Distal tipping and movement and impeded extrusion of the maxillary first molars were notable in the treatment group compared with the control group. The actual treatment changes with the use of the quad-helix found expression in distal tipping and impeded vertical eruption of maxillary second molars. The more the maxillary first molars were tipped distally and the less the maxillary first molars extruded, the more the vertical eruption of the maxillary second molars was impeded.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Quad-helix treatment gives rise to spontaneous distal tipping and impeded vertical eruption of the maxillary second molars.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2319\/072111-459.1","type":"journal-article","created":{"date-parts":[[2011,12,8]],"date-time":"2011-12-08T09:37:55Z","timestamp":1323337075000},"page":"676-681","source":"Crossref","is-referenced-by-count":4,"title":["Treatment effects of quad-helix on the eruption pattern of maxillary second molars"],"prefix":"10.2319","volume":"82","author":[{"given":"Yoshiki","family":"Kobayashi","sequence":"first","affiliation":[{"name":"Assistant Professor, Nippon Dental University Niigata Hospital, Niigata, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isao","family":"Shundo","sequence":"additional","affiliation":[{"name":"Assistant Professor, Nippon Dental University Niigata Hospital, Niigata, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshiya","family":"Endo","sequence":"additional","affiliation":[{"name":"Professor and Chair, Orthodontic Dentistry, Nippon Dental University Niigata Hospital, Niigata, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1164","reference":[{"key":"i0003-3219-82-4-676-b01","series-title":"Br J Orthod","first-page":"97","article-title":"Three-dimensional evaluation of dentoskeletal changes after posterior cross-bite correction by quad-helix or removable appliances.","volume":"19","author":"Boysen, B.","year":"1992","unstructured":"Boysen, B., K.La Cour, A. E.Athanasiou, and P. E.Gjessing. Three-dimensional evaluation of dentoskeletal changes after posterior cross-bite correction by quad-helix or removable appliances.Br J Orthod1992. 19:97\u2013107."},{"key":"i0003-3219-82-4-676-b02","series-title":"Am J Orthod Dentofacial Orthop","first-page":"287","article-title":"A comparison of different treatment techniques for posterior crossbite in the mixed dentition.","volume":"116","author":"Erdinc, A. E.","year":"1999","unstructured":"Erdinc, A. E., T.Ugur, and E.Erbay. A comparison of different treatment techniques for posterior crossbite in the mixed dentition.Am J Orthod Dentofacial Orthop1999. 116:287\u2013300."},{"key":"i0003-3219-82-4-676-b03","series-title":"Odontology","article-title":"Short-term treatment effects of quad-helix on maxillomandibular expansion in patients with maxillary incisor crowding.","author":"Shundo, I.","year":"In press","unstructured":"Shundo, I., Y.Kobayashi, and T.Endo. Short-term treatment effects of quad-helix on maxillomandibular expansion in patients with maxillary incisor crowding.OdontologyIn press."},{"key":"i0003-3219-82-4-676-b04","series-title":"Am J Orthod Dentofac Orthop","first-page":"321","article-title":"Skeletal and dental changes after maxillary expansion in the mixed dentition.","volume":"111","author":"Sandikcioglu, M.","year":"1997","unstructured":"Sandikcioglu, M. and S.Hazar. Skeletal and dental changes after maxillary expansion in the mixed dentition.Am J Orthod Dentofac Orthop1997. 111:321\u2013327."},{"key":"i0003-3219-82-4-676-b05","series-title":"Am J Orthod Dentofacial Orthop","first-page":"331","article-title":"Treatment response and stability of slow maxillary expansion using Haas, hyrax, and quad-helix appliances: a retrospective study.","volume":"136","author":"Huynh, T.","year":"2009","unstructured":"Huynh, T., D. B.Kennedy, D. R.Joondeph, and A. M.Bollen. Treatment response and stability of slow maxillary expansion using Haas, hyrax, and quad-helix appliances: a retrospective study.Am J Orthod Dentofacial Orthop2009. 136:331\u2013339."},{"key":"i0003-3219-82-4-676-b06","series-title":"Eur J Orthod","first-page":"97","article-title":"Treatment of unilateral posterior crossbite with quad-helix and removable plates: a retrospective study.","volume":"7","author":"Hermanson, H.","year":"1985","unstructured":"Hermanson, H., J.Kurol, and A.Ronnerman. Treatment of unilateral posterior crossbite with quad-helix and removable plates: a retrospective study.Eur J Orthod1985. 7:97\u2013102."},{"key":"i0003-3219-82-4-676-b07","series-title":"Am J Orthod Dentofac Orthop","first-page":"639","article-title":"Evaluation of an intraoral maxillary molar distalization technique.","volume":"110","author":"Ghosh, J.","year":"1996","unstructured":"Ghosh, J. and R. S.Nanda. Evaluation of an intraoral maxillary molar distalization technique.Am J Orthod Dentofac Orthop1996. 110:639\u2013646."},{"key":"i0003-3219-82-4-676-b08","series-title":"Angle Orthod","first-page":"686","article-title":"A comparative analysis of maxillary tooth movement produced by cervical headgear and pend-x appliance.","volume":"73","author":"Taner, T. U.","year":"2003","unstructured":"Taner, T. U., F.Yukay, M.Pehlivanoglu, and B.Cakirer. A comparative analysis of maxillary tooth movement produced by cervical headgear and pend-x appliance.Angle Orthod2003. 73:686\u2013691."},{"key":"i0003-3219-82-4-676-b09","series-title":"Angle Orthod","first-page":"857","article-title":"Treatment and posttreatment changes with combined headgear therapy.","volume":"77","author":"Tortop, T.","year":"2007","unstructured":"Tortop, T. and S.Yuksel. Treatment and posttreatment changes with combined headgear therapy.Angle Orthod2007. 77:857\u2013863."},{"key":"i0003-3219-82-4-676-b10","series-title":"Angle Orthod","first-page":"642","article-title":"Early headgear effect on the eruption pattern of maxillary second molars.","volume":"80","author":"Abed, Y.","year":"2010","unstructured":"Abed, Y. and I.Brin. Early headgear effect on the eruption pattern of maxillary second molars.Angle Orthod2010. 80:642\u2013648."},{"key":"i0003-3219-82-4-676-b11","series-title":"Angle Orthod","first-page":"189","article-title":"Repelling magnets versus superelastic nickel-titanium coils in simultaneous distal movement of maxillary first and second molars.","volume":"64","author":"Bondemark, L.","year":"1994","unstructured":"Bondemark, L., J.Kurol, and M.Bernhold. Repelling magnets versus superelastic nickel-titanium coils in simultaneous distal movement of maxillary first and second molars.Angle Orthod1994. 64:189\u2013198."},{"key":"i0003-3219-82-4-676-b12","series-title":"Eur J Orthod","first-page":"293","article-title":"Effects of a three-dimensional bimetric maxillary distalizing arch.","volume":"22","author":"Ucem, T. T.","year":"2000","unstructured":"Ucem, T. T., S.Yuksel, C.Okay, and A.Gulsen. Effects of a three-dimensional bimetric maxillary distalizing arch.Eur J Orthod2000. 22:293\u2013298."},{"key":"i0003-3219-82-4-676-b13","series-title":"Bolton Standards of Dentofacial Developmental Growth","author":"Broadbent, B. H.","year":"1975","unstructured":"Broadbent, B. H., B. H.BroadbentJr, and W. H.Golden. Bolton Standards of Dentofacial Developmental Growth. 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A comparison of different treatment techniques for posterior crossbite in the mixed dentition.Am J Orthod Dentofacial Orthop1999. 116:287\u2013300."},{"key":"i0003-3219-82-4-676-b03","series-title":"Odontology","article-title":"Short-term treatment effects of quad-helix on maxillomandibular expansion in patients with maxillary incisor crowding.","author":"Shundo, I.","year":"In press","unstructured":"Shundo, I., Y.Kobayashi, and T.Endo. Short-term treatment effects of quad-helix on maxillomandibular expansion in patients with maxillary incisor crowding.OdontologyIn press."},{"key":"i0003-3219-82-4-676-b04","series-title":"Am J Orthod Dentofac Orthop","first-page":"321","article-title":"Skeletal and dental changes after maxillary expansion in the mixed dentition.","volume":"111","author":"Sandikcioglu, M.","year":"1997","unstructured":"Sandikcioglu, M. and S.Hazar. Skeletal and dental changes after maxillary expansion in the mixed dentition.Am J Orthod Dentofac Orthop1997. 111:321\u2013327."},{"key":"i0003-3219-82-4-676-b05","series-title":"Am J Orthod Dentofacial Orthop","first-page":"331","article-title":"Treatment response and stability of slow maxillary expansion using Haas, hyrax, and quad-helix appliances: a retrospective study.","volume":"136","author":"Huynh, T.","year":"2009","unstructured":"Huynh, T., D. B.Kennedy, D. R.Joondeph, and A. M.Bollen. Treatment response and stability of slow maxillary expansion using Haas, hyrax, and quad-helix appliances: a retrospective study.Am J Orthod Dentofacial Orthop2009. 136:331\u2013339."},{"key":"i0003-3219-82-4-676-b06","series-title":"Eur J Orthod","first-page":"97","article-title":"Treatment of unilateral posterior crossbite with quad-helix and removable plates: a retrospective study.","volume":"7","author":"Hermanson, H.","year":"1985","unstructured":"Hermanson, H., J.Kurol, and A.Ronnerman. Treatment of unilateral posterior crossbite with quad-helix and removable plates: a retrospective study.Eur J Orthod1985. 7:97\u2013102."},{"key":"i0003-3219-82-4-676-b07","series-title":"Am J Orthod Dentofac Orthop","first-page":"639","article-title":"Evaluation of an intraoral maxillary molar distalization technique.","volume":"110","author":"Ghosh, J.","year":"1996","unstructured":"Ghosh, J. and R. S.Nanda. Evaluation of an intraoral maxillary molar distalization technique.Am J Orthod Dentofac Orthop1996. 110:639\u2013646."},{"key":"i0003-3219-82-4-676-b08","series-title":"Angle Orthod","first-page":"686","article-title":"A comparative analysis of maxillary tooth movement produced by cervical headgear and pend-x appliance.","volume":"73","author":"Taner, T. U.","year":"2003","unstructured":"Taner, T. U., F.Yukay, M.Pehlivanoglu, and B.Cakirer. A comparative analysis of maxillary tooth movement produced by cervical headgear and pend-x appliance.Angle Orthod2003. 73:686\u2013691."},{"key":"i0003-3219-82-4-676-b09","series-title":"Angle Orthod","first-page":"857","article-title":"Treatment and posttreatment changes with combined headgear therapy.","volume":"77","author":"Tortop, T.","year":"2007","unstructured":"Tortop, T. and S.Yuksel. Treatment and posttreatment changes with combined headgear therapy.Angle Orthod2007. 77:857\u2013863."},{"key":"i0003-3219-82-4-676-b10","series-title":"Angle Orthod","first-page":"642","article-title":"Early headgear effect on the eruption pattern of maxillary second molars.","volume":"80","author":"Abed, Y.","year":"2010","unstructured":"Abed, Y. and I.Brin. Early headgear effect on the eruption pattern of maxillary second molars.Angle Orthod2010. 80:642\u2013648."},{"key":"i0003-3219-82-4-676-b11","series-title":"Angle Orthod","first-page":"189","article-title":"Repelling magnets versus superelastic nickel-titanium coils in simultaneous distal movement of maxillary first and second molars.","volume":"64","author":"Bondemark, L.","year":"1994","unstructured":"Bondemark, L., J.Kurol, and M.Bernhold. Repelling magnets versus superelastic nickel-titanium coils in simultaneous distal movement of maxillary first and second molars.Angle Orthod1994. 64:189\u2013198."},{"key":"i0003-3219-82-4-676-b12","series-title":"Eur J Orthod","first-page":"293","article-title":"Effects of a three-dimensional bimetric maxillary distalizing arch.","volume":"22","author":"Ucem, T. T.","year":"2000","unstructured":"Ucem, T. T., S.Yuksel, C.Okay, and A.Gulsen. Effects of a three-dimensional bimetric maxillary distalizing arch.Eur J Orthod2000. 22:293\u2013298."},{"key":"i0003-3219-82-4-676-b13","series-title":"Bolton Standards of Dentofacial Developmental Growth","author":"Broadbent, B. H.","year":"1975","unstructured":"Broadbent, B. H., B. H.BroadbentJr, and W. H.Golden. Bolton Standards of Dentofacial Developmental Growth. St Louis, MoCV Mosby. 1975."}],"container-title":["The Angle Orthodontist"],"original-title":[],"link":[{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/view\/journals\/angl\/82\/4\/article-p676.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/downloadpdf\/journals\/angl\/82\/4\/article-p676.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/downloadpdf\/journals\/angl\/82\/4\/article-p676.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T16:02:12Z","timestamp":1780070532000},"score":1,"resource":{"primary":{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/view\/journals\/angl\/82\/4\/article-p676.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,7]]},"references-count":26,"journal-issue":{"issue":"4"},"URL":"https:\/\/doi.org\/10.2319\/072111-459.1","relation":{},"ISSN":["0003-3219","1945-7103"],"issn-type":[{"value":"0003-3219","type":"print"},{"value":"1945-7103","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,7]]}}}