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However, the outcome of SABG was not satisfactory as expected, factors that affecting the outcome were still controversial. The aims of this study were to summarize a new method for the classification of alveolar cleft morphology in patients with unilateral cleft lip and alveolus or unilateral cleft lip and palate, to evaluate the correlation between the morphology and SABG outcomes, to identify factors that might predict the outcomes.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>The characteristics of the cleft morphologies of 120 patients who underwent SABG were observed using the preoperative Cone-Beam Computed Tomography (CBCT) images. 52 patients who had CBCT scans performed at least 6\u00a0months after SABG were included for the evaluation of outcomes. Both categorical and continuous evaluation methods were measured. Correlations between cleft morphology and SABG outcomes were assessed using the Pearson correlation coefficient in SPSS 27.0.0.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>A new method for the classification of cleft morphology was summarized:type I, prism type (labial defect size\u2009\u2265\u2009palatal defect size; nasal defect size\u2009\u2265\u2009occlusal defect size); type II, prism\u2019 type (labial defect\u2009\u2265\u2009palatal defect; nasal defect\u2009&lt;\u2009occlusal defect); type III, inverted prism type (palatal defect\u2009\u2265\u2009labial defect); type IV, funnel type (presented as a significantly narrow defect area in the middle towards the vertical dimension); and type V, undefinable (extremely irregular morphology can\u2019t be defined as any of the above types). Categorical evaluation showed 8 failure, 11 poor, 12 moderate, and 21 good results, while the average bone filling rate was 59.24\u2009\u00b1\u200930.68%. There was a significant correlation between the cleft morphology and categorical\/continuous evaluation outcome (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The new method for the classification of alveolar cleft morphology summarized in this study was comprehensive and convenient for clinical application. Both categorical and continuous methods should be used for radiographic assessments in patients undergoing SABG. The chances of a successful procedure might be better when the patient has type I or IV morphology, in which the shape is like a funnel in the relatively palatal or occlusal area towards the vertical dimension. A relatively great amount of bone resorption was observed in most patients.<\/jats:p>\n                <jats:p><jats:italic>Trial registration<\/jats:italic> Chinese clinical trial registry; registration number: ChiCTR2100054438.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-022-02265-4","type":"journal-article","created":{"date-parts":[[2022,6,22]],"date-time":"2022-06-22T16:36:54Z","timestamp":1655915814000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Correlation between alveolar cleft morphology and the outcome of secondary alveolar bone grafting for unilateral cleft lip and palate"],"prefix":"10.1186","volume":"22","author":[{"given":"Xinlei","family":"Yu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiping","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weiran","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,6,22]]},"reference":[{"key":"2265_CR1","doi-asserted-by":"publisher","first-page":"124","DOI":"10.1159\/000337666","volume":"16","author":"G Semb","year":"2012","unstructured":"Semb G. 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Reference number: PKUSSIRB-202163059. The research was performed in accordance with the Declaration of Helsinki and have been approved by the ethics committee of the Peking University School and Hospital of Stomatology. Informed consent was obtained from all participants. All methods were performed in accordance with the relevant guidelines and regulations.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The author(s) declare no potential conflicts of interest with respect to the research, authorship, and\/or publication of this article.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"251"}}