{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,5]],"date-time":"2025-12-05T07:36:15Z","timestamp":1764920175814,"version":"3.46.0"},"reference-count":7,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T00:00:00Z","timestamp":1761955200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T00:00:00Z","timestamp":1761955200000},"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":["J Orthod"],"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:p>Ectopic eruption of the first permanent molar is prevalent in children, with a reported prevalence of up to 6%. Treatment options usually range from passive observation to active correction with orthodontic appliances like separators or distalising devices. This study outlines the step-by-step procedure for creating a \u2018pistol spring\u2019 system, which delivers a consistent, sustained force, reducing the need for frequent reactivation. The system is easy to fabricate, well-tolerated and enhances treatment efficiency, improving patient compliance and reducing chair-side time. The \u2018pistol spring\u2019 offers a cost-effective, time-efficient solution for managing ectopic first molars, particularly in paediatric patients with limited appointment availability.<\/jats:p>","DOI":"10.1177\/14653125251389981","type":"journal-article","created":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T10:31:24Z","timestamp":1761993084000},"page":"386-389","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["The \u2018pistol spring\u2019 for correcting ectopic permanent molar"],"prefix":"10.1177","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7856-8091","authenticated-orcid":false,"given":"Li","family":"Mei","sequence":"first","affiliation":[{"name":"Discipline of Orthodontics, Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,11]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.3390\/dj11090206"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/ijcp.13880"},{"key":"e_1_3_2_4_1","first-page":"26","article-title":"Etiology, classification and management of ectopic eruption of permanent first molars","volume":"98","author":"Hsiao CC","year":"2016","unstructured":"Hsiao CC, Boynton JR (2016) Etiology, classification and management of ectopic eruption of permanent first molars. Journal of the Michigan Dental Association 98: 26\u201330.","journal-title":"Journal of the Michigan Dental Association"},{"key":"e_1_3_2_5_1","first-page":"652","article-title":"The piston elastic: A novel device for treating entrapped ectopic permanent molars","volume":"8","author":"Kim IH","year":"2021","unstructured":"Kim IH, Kang CM, Song JS, Lee J, Choi HJ, Kim SO (2021) The piston elastic: A novel device for treating entrapped ectopic permanent molars. Children (Basel) 8: 652.","journal-title":"Children (Basel)"},{"key":"e_1_3_2_6_1","first-page":"454","article-title":"First molar bypass technique for uprighting ectopic second molars","volume":"38","author":"McFarlane RB","year":"2004","unstructured":"McFarlane RB (2004) First molar bypass technique for uprighting ectopic second molars. Journal of Clinical Orthodontics 38: 454.","journal-title":"Journal of Clinical Orthodontics"},{"key":"e_1_3_2_7_1","first-page":"57","article-title":"Orthodontic management of ectopic maxillary first permanent molars: A case report","volume":"27","author":"Seehra J","year":"2011","unstructured":"Seehra J, Winchester L, DiBiase AT, Cobourne MT (2011) Orthodontic management of ectopic maxillary first permanent molars: A case report. Australasian Orthodontic Journal 27: 57\u201362.","journal-title":"Australasian Orthodontic Journal"},{"key":"e_1_3_2_8_1","first-page":"407","article-title":"The piston elastic for uprighting an ectopic molar","volume":"57","author":"Wangsrimongkol B","year":"2023","unstructured":"Wangsrimongkol B (2023) The piston elastic for uprighting an ectopic molar. Journal of Clinical Orthodontics 57: 407\u2013408.","journal-title":"Journal of Clinical Orthodontics"}],"container-title":["Journal of Orthodontics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/14653125251389981","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/14653125251389981","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/14653125251389981","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,5]],"date-time":"2025-12-05T07:04:48Z","timestamp":1764918288000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/14653125251389981"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,11]]},"references-count":7,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2025,12]]}},"alternative-id":["10.1177\/14653125251389981"],"URL":"https:\/\/doi.org\/10.1177\/14653125251389981","relation":{},"ISSN":["1465-3125","1465-3133"],"issn-type":[{"type":"print","value":"1465-3125"},{"type":"electronic","value":"1465-3133"}],"subject":[],"published":{"date-parts":[[2025,11]]}}}