{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T07:18:51Z","timestamp":1782890331318,"version":"3.54.5"},"reference-count":0,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[1996,4,1]],"date-time":"1996-04-01T00:00:00Z","timestamp":828316800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[1996,4]]},"abstract":"<jats:p>M<jats:sc>ultirooted teeth in which chronic<\/jats:sc> periodontitis has progressed to involve the furcation present special problems in treatment. The apical placement of furcation, narrow furcation entrance, concavities on the root surface, and the undesirable root configuration make instrumentation and plaque control difficult. Furcation involvement, when present in maxillary first premolars in particular, presents \u00e1 poor prognosis as the furcation opens mesiodistally. This study on 100 extracted maxillary first premolars is an attempt to determine the frequency of bifurcation, the proximity of bifurcation to cemento\u2010enamel junction, the depth of concavities on the root trunk and the furcal aspect of root, the diameter of furcation entrance, and the extent of root divergence. <jats:italic>J Periodontol 1996;67:386\u2013389.<\/jats:italic><\/jats:p>","DOI":"10.1902\/jop.1996.67.4.386","type":"journal-article","created":{"date-parts":[[2012,3,20]],"date-time":"2012-03-20T20:40:47Z","timestamp":1332276047000},"page":"386-389","source":"Crossref","is-referenced-by-count":27,"title":["Clinical Significance of Furcation Anatomy of the Maxillary First Premolar: A Biometric Study on Extracted Teeth"],"prefix":"10.1002","volume":"67","author":[{"given":"Ida","family":"Joseph","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.R.R.","family":"Varma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K. Mahalinga","family":"Bhat","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[1996,4]]},"container-title":["Journal of Periodontology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/aap.onlinelibrary.wiley.com\/doi\/pdf\/10.1902\/jop.1996.67.4.386","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T14:38:19Z","timestamp":1760884699000},"score":1,"resource":{"primary":{"URL":"https:\/\/aap.onlinelibrary.wiley.com\/doi\/10.1902\/jop.1996.67.4.386"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1996,4]]},"references-count":0,"journal-issue":{"issue":"4","published-print":{"date-parts":[[1996,4]]}},"alternative-id":["10.1902\/jop.1996.67.4.386"],"URL":"https:\/\/doi.org\/10.1902\/jop.1996.67.4.386","archive":["Portico"],"relation":{},"ISSN":["0022-3492","1943-3670"],"issn-type":[{"value":"0022-3492","type":"print"},{"value":"1943-3670","type":"electronic"}],"subject":[],"published":{"date-parts":[[1996,4]]}}}