{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T23:57:31Z","timestamp":1793059051741,"version":"4.5.0"},"reference-count":56,"publisher":"The Angle Orthodontist (EH Angle Education & Research Foundation)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,5]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objectives<\/jats:title>\n To evaluate the presence of dehiscences and changes in alveolar bone height and width in the area of the mandibular central incisors pre- and post-orthodontic treatment.<\/jats:p>\n <\/jats:sec>\n \n Materials and Methods<\/jats:title>\n In 60 skeletal Class II patients, cone-beam computed tomographic (CBCT) images were obtained and the patients were divided into four groups based on the presence of dehiscences at pre- and post-orthodontic treatment. The alveolar bone height and width were measured on CBCT in cross section along the long axis of the teeth. Lateral cephalograms were analyzed.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n The changes in L1-NB and IMPA appeared to be correlated with vertical bone loss and dehiscence. Alveolar bone height appeared to follow a segmented relationship with these two variables, with changes below a threshold (L1-NB = 0.71 mm, IMPA = 3.02\u00b0) having relatively minimal or no effect on bone loss but with changes beyond the threshold correlated with extensive bone loss. Similarly, increases in L1-NB or IMPA correlated with decreases in alveolar bone width (L1-NB: \u22120.25 mm\/mm, IMPA: \u22120.07 mm\/\u00b0) and increased the probability of developing dehiscences, with an estimated 50% probability of vertical bone loss at a L1-NB change of 2.00 mm or, equivalently, an IMPA change of 8.02\u00b0 was estimated.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n When treating skeletal Class II patients, the limits of incisor proclination\/protraction are less than previously thought. To prevent undesired periodontal outcomes, careful three-dimensional diagnosis is advisable. Furthermore, when excessive protrusion and\/or proclination is planned, additional treatment modalities, including orthognathic surgery, tooth extraction, and corticotomy with bone graft, should be considered.<\/jats:p>\n <\/jats:sec>","DOI":"10.2319\/080219-510.1","type":"journal-article","created":{"date-parts":[[2020,2,19]],"date-time":"2020-02-19T10:13:57Z","timestamp":1582107237000},"page":"330-338","source":"Crossref","is-referenced-by-count":45,"title":["A cone-beam computed tomographic evaluation of alveolar bone dimensional changes and the periodontal limits of mandibular incisor advancement in skeletal Class II patients"],"prefix":"10.2319","volume":"90","author":[{"given":"Kensuke","family":"Matsumoto","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott","family":"Sherrill-Mix","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Normand","family":"Boucher","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nipul","family":"Tanna","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1164","reference":[{"key":"i0003-3219-90-3-330-b01","series-title":"Current Orthodontic Concepts and Techniques, 1st ed","first-page":"3","article-title":"Diagnosis and treatment planning","author":"Proffit","year":"1982","unstructured":"Proffit\n WR,\n \n \n Ackerman\n JL.\n \n \n Diagnosis and treatment planning.\n\t\t\t\t\tIn:GraberTM,SwainBF,eds.Current Orthodontic Concepts and Techniques, 1st 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