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VOLUME 10 , ISSUE 2 ( March, 2009 ) > List of Articles


Evaluation of a New Furcation Stent as a Fixed Reference Point for Class II Furcation Measurements

Vandana Laxman, Manish Khatri, C.G. Devaraj, Kranti Reddy, Ramesh Reddy

Citation Information : Laxman V, Khatri M, Devaraj C, Reddy K, Reddy R. Evaluation of a New Furcation Stent as a Fixed Reference Point for Class II Furcation Measurements. J Contemp Dent Pract 2009; 10 (2):18-25.

DOI: 10.5005/jcdp-10-2-18

License: CC BY-NC 3.0

Published Online: 01-04-2011

Copyright Statement:  Copyright © 2009; The Author(s).



To date probing of the furcation using sounding has been one of the reliable methods to assess horizontal component of furcation in multirooted teeth. A more precise and reliable measurement of this horizontal component of furcation involves using a fixed reference point providing stability and reproducibility of measurements. A custom stent is used to provide a fixed reference point and can be used pre- and postsurgically without re-entry. Therefore, the purposes of this study were to (1) assess the reliability of furcation measurements by direct probing (without stent) and with the use of a newly designed furcation stent and (2) to assess the furcation measurements in relation to gingival margin position pre- and post-operatively.

Methods and Materials

Forty-three chronic periodontitis patients with buccal grade II furcation involvement in maxillary or mandibular molars were included. The furcation involvement was measured by direct probing using a UNC-15 calibrated probe with and without using a custom stent. The furcation involvement and gingival margin position were measured pre- and post-surgically.


There was a significant reduction in plaque (PI) and gingival inflammation (GI) during the study period. The reduction in plaque index and gingival index was observed from 1.75 ± 0.35 to 0.92 ± 0.30, 1.88 ± 0.35 to 0.98 ± 0.29, respectively. Complete agreement was found between the first and the second measurement for about 74% of sites without the custom stent, whereas 86% of the sites measured using the stent had complete agreement. The differences never exceeded 1 mm for any of the sites. There was significant (t = 2.49; p<0.05) difference observed at complete agreement level (‘0’ difference).


It may be concluded the clinical attachment level-H of the furcation involvement using a PCP UNC-15 probe and a custom designed stent provides reproducible information about the furcation depth in multirooted teeth.

Clinical Significance

Use of a simple modified furcation stent has shown greater reproducibility of furcal depth measurements than direct probing without the stent. The furcation stent definitely addresses the problems of existing methods of horizontal furcal depth measurements reported in the literature. The major advantages of the newly designed stent are the simple construction and non-invasive application which translates to wide practical applications.


Laxman VK, Khatri M, Devaraj CG, Reddy K, Reddy R. Evaluation of a New Furcation Stent as a Fixed Reference Point for Class II Furcation Measurements. J Contemp Dent Pract 2009 March; (10)2:018-025.

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  1. Clinical furcation diagnosis and interradicular bone defects. J Periodontol 1993; 64:219-227.
  2. The influence of molar furcation involvement and mobility on future clinical periodontal attachment loss. J Periodontol 1994; 65:25-29.
  3. Comparative study of collagen and expanded polytetraflouroethylene membranes in the treatment of human class II furcation defect. J Periodontol 1994; 65:598-604.
  4. Computer-assissted densitometric image analysis (CADIA) for the assessment of alveolar bone density changes in furcations. J Clin Periodontol 1989; 16:46-52.
  5. The reliability of furcation measurements. J Clin Periodontol 1994; 21: 611-614.
  6. Methods of assessing periodontal regeneration. Periodontol 2000 1999; 19:87-103.
  7. Radiographs in periodontics. J Clin Periodontol 1977; 4:16.
  8. The effect of structural noise on the detection of radiographic abnormalities. Invest Dermatol Radiol 1974; 9:479-486.
  9. Reproducibility and the validity of furcation measurements as related to class of furcation invasion. J Periodontol 1995; 66:984-989.
  10. Reproducibility and validity of furcation measurements using a pressure-calibrated probe. J Clin Periodontol 1996; 23:826-831.
  11. Probing bone level measurements for the determination of the depths of class II furcation defects. J Periodontol 2002; 73:637-642.
  12. Inter-examinar reproducibility of probing pocket depths in molar furcation sites. J Clin Periodontol 1988; 15:68-72.
  13. Use of furcal bone sounding to improve accuracy of furcation diagnosis. J Periodontol 1994; 65:649-657.
  14. Clinical Periodontology,1st ed. Philadelphia:Saunders; 1953.
  15. The gingival index, the plaque index and the retention index system. J Periodontol 1967; 38:610-616.
  16. Reliability of attachment level measurements using the cementoenamel junction and a plastic stent. J Periodontol 1987; 58:115-118.
  17. Reproducibility of probing attachment level measurements. J Clin Periodontol 1984; 11:475-485.
  18. Indices for prevalence and incidence of periodontal disease. J Periodontol 1959; 30:51-59.
  19. Periodontal probing: what does that mean? J Clin Periodontol 1980; 17:165-176.
  20. Periodontal probing: interinvestigator discrepancies and correlations between probing force and recorded depth. Helvetica Odontologica Acta 1973; 17:38-42.
  21. Accuracy of probing attachment levels using CEJ probe versus traditional probes. J Clin Periodontol 2004; 31:173-176.
  22. Validity of clinical assessments related to cementoenamel junction. J Dent Res 1983; 62:825-829.
  23. A new periodontal probe with automated cementoenamel junction detection. J Clin Periodontol 1986; 13:276-280.
  24. Alterations of the position of the marginal soft tissue following periodontal surgery. J Clin Periodontol 1980; 7:525-530.
  25. The effect of root planning as compared to that of surgical treatment. J Clin Periodontal 1984; 11:669-681.
  26. Routine-sulcus-diepte metingen in de parodontologie. Het beland-de betrouwbaar-heid – detoepassing. Thesis. Amsterdam University. 1994:pp. 44-52.
  27. Effect of non surgical periodontal therapy (I). Moderately advanced periodontitis. J Clin Periodontol 1981; 8:57-72.
  28. The influence of probing force on the reproducibility of pocket depth measurement. J Clin Periodontol 1980; 7:414-420.
  29. A pressure sensitive periodontal probe. Helvetica Odontologica Acta 1971; 5:114-117.
  30. Constant force probing with and without a stent in untreated periodontal disease: The clinical reproducibility problem and possible sources of error. J Clin Periodontol 1987; 14:407-411.
  31. Reproducibility and validity of the assessment of clinical furcation parameters as related to different probes. J Periodontol 1998; 69:328-336.
  32. Guided tissue regeneration in degree II furcation involved mandibular molars. A clinical study. J Clin Periodontol 1988; 15:247-254.
  33. Periodontal treatment of multirooted teeth. Results after 5 years. J Clin Periodontol 1975; 2:126-135.
  34. Periodontal regeneration: Current status and Directions (ed). 1994 Page 156, chap 9, Quintessence Publishing.
  35. The use of collagen membranes to guide regeneration of new connective tissue attachment in dogs. J Periodontol 1988; 59:830-836.
  36. Evaluation of guided tissue regeneration in class II furcation defects. A clinical reentry study. J Periodontol 1989; 60:694-698.
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