{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T05:10:35Z","timestamp":1788930635785,"version":"build-2803163510"},"reference-count":31,"publisher":"SAGE Publications","issue":"2","license":[{"start":{"date-parts":[[2020,8,18]],"date-time":"2020-08-18T00:00:00Z","timestamp":1597708800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["The Cleft Palate Craniofacial Journal"],"published-print":{"date-parts":[[2021,2]]},"abstract":"<jats:sec>\n                    <jats:title>Objectives:<\/jats:title>\n                    <jats:p>To evaluate the tooth lengths, crown to root ratios (CRRs), and alveolar bone support (ABS) around cleft-adjacent maxillary central incisors (U1s) in patients with unilateral cleft lip and alveolus (UCLA) and to investigate the relationships between CRR and ABS.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Design:<\/jats:title>\n                    <jats:p>This is a retrospective study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Setting:<\/jats:title>\n                    <jats:p>Cleft Lip and Palate Care Center of Shanghai Ninth People\u2019s Hospital, Shanghai, China.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Patients:<\/jats:title>\n                    <jats:p>Fifty-eight Chinese patients with UCLA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Main Outcome Measure:<\/jats:title>\n                    <jats:p>Cone beam computed tomography data from 58 nonsyndromic patients with UCLA (36 males, 22 females; mean age = 12.65 \u00b1 3.64 years) were evaluated. Crown length and root length, alveolar bone thickness (ABT), and the distances between the cementoenamel junction and alveolar bone crest on 4 surfaces of cleft-adjacent U1 were measured and compared with those of noncleft side in the same patients. Crown to root ratio and frequency of dehiscence were calculated and comparisons were also made between cleft and noncleft sides. Regression analysis was performed to explore the association between CRR and ABS.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      The CRR of cleft-adjacent U1 and alveolar bone crest heights (ACHs) on the 4 surfaces were significantly greater than those of noncleft side (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .01). A 3 mm labial, all lingual, and apico-distal ABTs decreased on the cleft side (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .01). A positive correlation was found between lingual ACH and CRR (\n                      <jats:italic>R<\/jats:italic>\n                      = 0.316,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .05), between the 3 mm (\n                      <jats:italic>R<\/jats:italic>\n                      = 0.417,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .05) and 6 mm labial (\n                      <jats:italic>R<\/jats:italic>\n                      = 0.448,\n                      <jats:italic>P &lt;<\/jats:italic>\n                      .05) ABT and CRR. A negative correlation was found between the 3 mm and 6 mm labial ABTs and the root length.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>It can be suggested that the CRR is related to ACH and ABT. The lingual ACH, the 3 mm, and 6 mm labial ABTs tend to increase with the increasing CRR.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/1055665620950155","type":"journal-article","created":{"date-parts":[[2020,8,18]],"date-time":"2020-08-18T05:20:04Z","timestamp":1597728004000},"page":"215-221","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Relationship Between Crown to Root Ratio and Alveolar Bone Support in Patients With Unilateral Cleft Lip and Alveolus"],"prefix":"10.1177","volume":"58","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3068-164X","authenticated-orcid":false,"given":"Sijing","family":"Huang","sequence":"first","affiliation":[{"name":"Department of Orthodontics, Shanghai Ninth People\u2019s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Huangpu District, Shanghai, China"},{"name":"National Clinical Research Center for Oral Disease, Shanghai, China"},{"name":"Shanghai Key Laboratory of Stomatology &amp; Shanghai Research Institute of Stomatology, Shanghai, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Chen, PhD","sequence":"additional","affiliation":[{"name":"National Clinical Research Center for Oral Disease, Shanghai, China"},{"name":"Shanghai Key Laboratory of Stomatology &amp; Shanghai Research Institute of Stomatology, Shanghai, China"},{"name":"Department of Oral &amp; Craniomaxillofacial Surgery, Shanghai Ninth People\u2019s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Huangpu District, Shanghai, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenqi","family":"Chen, PhD","sequence":"additional","affiliation":[{"name":"Department of Orthodontics, Shanghai Ninth People\u2019s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Huangpu District, Shanghai, China"},{"name":"National Clinical Research Center for Oral Disease, Shanghai, China"},{"name":"Shanghai Key Laboratory of Stomatology &amp; Shanghai Research Institute of Stomatology, Shanghai, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2020,8,18]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/154405910408300218"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.2319\/020910-83.1"},{"key":"e_1_3_2_4_1","doi-asserted-by":"publisher","DOI":"10.2319\/042715-289.1"},{"key":"e_1_3_2_5_1","doi-asserted-by":"publisher","DOI":"10.1093\/ejo\/cju082"},{"key":"e_1_3_2_6_1","doi-asserted-by":"publisher","DOI":"10.1597\/07-226.1"},{"issue":"3","key":"e_1_3_2_7_1","first-page":"1003","article-title":"Assessment of the alveolar bone support of patients with unilateral cleft lip and palate: a cone-beam computed tomography study","volume":"85","author":"Esra E","year":"2015","unstructured":"Esra E, Mevlut C, Suleyman KB. 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