{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:25:19Z","timestamp":1760189119300,"version":"3.40.5"},"reference-count":13,"publisher":"The Angle Orthodontist (EH Angle Education & Research Foundation)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n        <jats:sec>\n          <jats:title>Objective:<\/jats:title>\n          <jats:p> To test the hypothesis that the use of a combination headgear (HG) during the first phase of orthodontic treatment has no effect on the eruption pattern of the maxillary second permanent molars.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Materials and Methods:<\/jats:title>\n          <jats:p>The records of the patients in a two-phase randomized clinical trial of early Class II treatment were utilized. The HG group comprised 47 patients, and the control (CON) group comprised 52 patients. The mean age of both groups was 9.4 years at the beginning of the clinical trial (T1). Cephalograms and panoramic views obtained at T1 and at the end of 15 months of phase I treatment or observation (T2) were utilized. The vertical and horizontal movements of the first and second upper molars (U6 and U7, respectively) were measured. The beginning of phase II (T3) and the end of phase II (T4) records were visually reviewed for follow-up of the eruption of the U7.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Results:<\/jats:title>\n          <jats:p>The pattern of movement for the distal and vertical displacement of the U6 and U7 was significantly different in the HG and CON groups (<jats:italic>P<\/jats:italic> &lt; .001). At the end of phase I, none of the U7 in either group were diagnosed as malposed or suspected for impaction. At the end of phase II, all but one U7 with a possible cystic lesion had erupted.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Conclusions:<\/jats:title>\n          <jats:p>The hypothesis is rejected. Forces exerted by combination headgear to the U6 in phase I have a distalizing effect and a transitory slowing down effect on the eruption of the U7 buds. These latter teeth always erupted except when pathology occurred.<\/jats:p>\n        <\/jats:sec>","DOI":"10.2319\/100509-555.1","type":"journal-article","created":{"date-parts":[[2010,5,19]],"date-time":"2010-05-19T19:40:48Z","timestamp":1274298048000},"page":"642-648","source":"Crossref","is-referenced-by-count":8,"title":["Early headgear effect on the eruption pattern of maxillary second molars"],"prefix":"10.2319","volume":"80","author":[{"given":"Yossi","family":"Abed","sequence":"first","affiliation":[{"name":"Lecturer, Department of Orthodontics, Hadassah Faculty of Dental Medicine, Hebrew University Jerusalem, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ilana","family":"Brin","sequence":"additional","affiliation":[{"name":"Professor, Department of Orthodontics, Hadassah Faculty of Dental Medicine, Hebrew University Jerusalem, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1164","reference":[{"key":"i0003-3219-80-4-642-b01","series-title":"Semin Orthod","first-page":"25","article-title":"The role of the headgear in growth modification.","volume":"12","author":"Nanda, R.","year":"2006","unstructured":"Nanda, R. and T.Dandajena. The role of the headgear in growth modification.Semin Orthod2006. 12:25\u201333."},{"key":"i0003-3219-80-4-642-b02","series-title":"Semin Orthod","first-page":"11","article-title":"Class II malocclusion: diagnostic and clinical considerations with and without treatment.","volume":"12","author":"Bishara, S.","year":"2006","unstructured":"Bishara, S.\n          \n          Class II malocclusion: diagnostic and clinical considerations with and without treatment.\n          Semin Orthod\n          2006. 12:11\u201312."},{"key":"i0003-3219-80-4-642-b03","series-title":"Am J Orthod Dentofacial Orthop","first-page":"333","article-title":"Dentoalveolar and skeletal changes associated with the pendulum appliance.","volume":"117","author":"Bussick, T. J.","year":"2000","unstructured":"Bussick, T. J. and J. A.McNamaraJr. Dentoalveolar and skeletal changes associated with the pendulum appliance.Am J Orthod Dentofacial Orthop2000. 117:333\u2013343."},{"key":"i0003-3219-80-4-642-b04","series-title":"Am J Orthod Dentofacial Orthop","first-page":"8","article-title":"Efficiency of a pendulum appliance for molar distalization related to second and third molar eruption stage.","volume":"125","author":"Kinzinger, G. S.","year":"2004","unstructured":"Kinzinger, G. S., U. B.Fritz, F. G.Sander, and P. R.Diedrich. Efficiency of a pendulum appliance for molar distalization related to second and third molar eruption stage.Am J Orthod Dentofacial Orthop2004. 125:8\u201323."},{"key":"i0003-3219-80-4-642-b05","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":"i0003-3219-80-4-642-b06","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":"i0003-3219-80-4-642-b07","series-title":"Am J Orthod Dentofacial Orthop","first-page":"391","article-title":"The effect of early intervention on skeletal pattern in Class II malocclusion: a randomized clinical trial.","volume":"111","author":"Tulloch, J. F.","year":"1997","unstructured":"Tulloch, J. F., C.Phillips, G.Koch, and W. R.Proffit. The effect of early intervention on skeletal pattern in Class II malocclusion: a randomized clinical trial.Am J Orthod Dentofacial Orthop1997. 111:391\u2013400."},{"key":"i0003-3219-80-4-642-b08","series-title":"Statistical Methods for Medical and Biological Students","author":"Dahlberg, E.","year":"1940","unstructured":"Dahlberg, E.\n          \n          Statistical Methods for Medical and Biological Students. New York, NYInterscience Publications. 1940."},{"key":"i0003-3219-80-4-642-b09","series-title":"Am J Orthod Dentofacial Orthop","first-page":"746","article-title":"Comparison of second molar eruption patterns in patients with skeletal Class II and skeletal Class I malocclusions.","volume":"130","author":"Brin, I.","year":"2006","unstructured":"Brin, I., S.Camasuvi, N.Dali, and D.Aizenbud. Comparison of second molar eruption patterns in patients with skeletal Class II and skeletal Class I malocclusions.Am J Orthod Dentofacial Orthop2006. 130:746\u2013751."},{"key":"i0003-3219-80-4-642-b10","series-title":"J Orofac Orthop","first-page":"94","article-title":"Sagittal space relations in the maxilla during molar eruption.","volume":"69","author":"Tschechne, S.","year":"2008","unstructured":"Tschechne, S., B.Muller, and J.Dibbets. Sagittal space relations in the maxilla during molar eruption.J Orofac Orthop2008. 69:94\u201398."},{"key":"i0003-3219-80-4-642-b11","series-title":"Textbook and Color Atlas of Tooth Impactions: Diagnosis, Treatment, Prevention","author":"Andreasen, J. O.","year":"1997","unstructured":"Andreasen, J. O., J. K.Petersen, and D. M.Laskin. Textbook and Color Atlas of Tooth Impactions: Diagnosis, Treatment, Prevention. Copenhagen, DenmarkMunksgaard. 1997."},{"key":"i0003-3219-80-4-642-b12","series-title":"Angle Orthod","first-page":"159","article-title":"Behavior of the maxillary first molar in three planes with emphasis on its role of providing room for the second and third molars during growth.","volume":"45","author":"Mitani, H.","year":"1975","unstructured":"Mitani, H.\n          \n          Behavior of the maxillary first molar in three planes with emphasis on its role of providing room for the second and third molars during growth.\n          Angle Orthod\n          1975. 45:159\u2013168."},{"key":"i0003-3219-80-4-642-b13","series-title":"J Orofac Orthop","first-page":"189","article-title":"Cephalometric analysis of molar and anterior tooth movement during cervical headgear treatment in relation to growth patterns.","volume":"69","author":"Godt, A.","year":"2008","unstructured":"Godt, A., M.Berneburg, M.Kalwitzki, and G.Goz. Cephalometric analysis of molar and anterior tooth movement during cervical headgear treatment in relation to growth patterns.J Orofac Orthop2008. 69:189\u2013200."}],"container-title":["The Angle Orthodontist"],"original-title":[],"link":[{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/view\/journals\/angl\/80\/4\/article-p642.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/downloadpdf\/journals\/angl\/80\/4\/article-p642.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/downloadpdf\/journals\/angl\/80\/4\/article-p642.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,5,16]],"date-time":"2025-05-16T00:52:05Z","timestamp":1747356725000},"score":1,"resource":{"primary":{"URL":"https:\/\/angle-orthodontist.kglmeridian.com\/view\/journals\/angl\/80\/4\/article-p642.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,7]]},"references-count":13,"journal-issue":{"issue":"4"},"URL":"https:\/\/doi.org\/10.2319\/100509-555.1","relation":{},"ISSN":["0003-3219","1945-7103"],"issn-type":[{"type":"print","value":"0003-3219"},{"type":"electronic","value":"1945-7103"}],"subject":[],"published":{"date-parts":[[2010,7]]}}}