Oral hygiene in furcation defects of upper molars is difficult to achieve. In this case report, a combined surgical and orthodontic treatment procedure is presented to facilitate access and plaque control in furcation areas of upper molars with class-III furcation defects. After endodontic treatment and root resection in an upper 1st molar, the remaining mesiobuccal and palatal roots were separated and aligned orthodontically within the dental arch, as one-rooted teeth. The new morphological position of the roots greatly facilitated oral hygiene and may offer a better long-term prognosis.
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