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  • Title: Periodontal probing of dental furcations compared with diagnosis by low-dose computed tomography: a case series.
    Author: Laky M, Majdalani S, Kapferer I, Frantal S, Gahleitner A, Moritz A, Ulm C.
    Journal: J Periodontol; 2013 Dec; 84(12):1740-6. PubMed ID: 23578249.
    Abstract:
    BACKGROUND: Therapeutic decisions in periodontal surgery are based on the accurate diagnosis of the furcation. Clinical probing is the basic diagnostic tool; however, the accuracy of clinical probing to distinguish Class II and Class III furcation defects is unknown. Therefore, this study compares clinical probing diagnoses to those of computed tomography (CT). METHODS: Seventy-five patients with severe periodontal disease were enrolled in this case series study. A total of 582 furcation sites in molars were assigned for the diagnosis of Class II and Class III furcation defects by clinical probing. Diagnosis based on CT served as a reference. RESULTS: The degree of furcation involvement on clinical findings was confirmed in 57% of the sites, whereas 20% were overestimated and 23% were underestimated compared with the radiologic analysis. Only 32% of Class III furcations in the CT scan were detected clinically. The best correlation of CT scan and clinical probing was found at buccal furcation sites in the mandible, with a κ-coefficient of 0.52, and buccal furcation sites in the maxilla, κ = 0.38. The κ-coefficient was 0.35 for lingual furcations, 0.29 for mesial furcations, and 0.27 for distal furcations, showing weaker correlations. CONCLUSIONS: CT scans offer more detailed information on furcation involvement than clinical probing. Especially before surgical treatment, three-dimensional radiographic imaging can be a useful tool to assess the degree of furcation involvement and optimize treatment decisions.
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