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International Poster Journal of Dentistry and Oral Medicine
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Int Poster J Dent Oral Med 9 (2007), No. 3     15. Sep. 2007

Int Poster J Dent Oral Med 2007, Vol 9 No 03, Poster 377

Success of tunnel preparations in molars with class III furcation involvement

Language: English

Authors:
Dr. Jens Kaltschmitt, Sektion Parodontologie, Poliklinik für Zahnerhaltungskunde, Klinik für Mund-, Zahn- und Kieferkrankheiten, Universitätsklinikum Heidelberg
Martin Radek, Sektion Parodontologie, Poliklinik für Zahnerhaltungskunde, Klinik für Mund-, Zahn- und Kieferkrankheiten, Universitätsklinikum Heidelberg
Dr. med. dent. Bettina Dannewitz, Sektion Parodontologie, Poliklinik für Zahnerhaltungskunde, Klinik für Mund-, Zahn- und Kieferkrankheiten, Universitätsklinikum Heidelberg
Prof. Dr. med. dent. Peter Eickholz, Poliklinik für Parodontologie Zentrum der Zahn- Mund- und Kieferheilkunde, Klinikum der Johann Wolfgang Goethe Universität Frankfurt

Date/Event/Venue:
29.06.2006 - 01.07.2006
Europerio 5
Madrid

Objectives

Retrospective evaluation of success after tunnel preparation of class III furcation molars.

Material and Methods

Patients

  • 41 Patients (29 female) mean age 54.8±10.8 years (24-76 years)
  • 56 Molars (40 in women)
  • Tunnel preparation between 1992-2004
  • Examination pre and 1-13 years postoperative by two claibrated investigators MR and JK

Statistical analysis

  • descriptive
  • Multilevel-Regression-analysis using PC software (Systat for Windows Version 10, Systat Inc., Evanston, IL., USA)
  • Statistical unit: Patient
  • Dependent Variable: Remaining time of tunnel
  • Independent Variables: sex, jaw (upper [UJ] / lower [LJ]), type of molar (1st, 2nd or 3rd), smoking, participation in supportive periodontal therapy (SPT)

Fig. 1 Number of tunnel preperations at baseline (a) and still in function (b) Fig. 2 preoperative

Fig. 3. preoperative Fig. 4. Intraoperative

Fig. 5. Intraoperative Fig. 6. 82 month postoperative

Results

Descriptive Statistics

  • 6 tunnel preparations were performed in the maxilla, 50 in the mandible
  • 40 tunnel preparations were done at 1st, 15 at 2nd, and 1 at a 3rd molar
  • 8 tunnel preparations were lost during the observation period: 7 in the mandible
  • For the tunnel preparations that had failed during follpw-up a mean survival time of 40.8±18.6 months was observed
  • For the tunnel preparations that were still in function, a mean survival time of 53.1±22.9 months was calculated

Multilevel-Regression-analysis

  • Multilevel-Regression-analysis identified frequent SPT as positive (p = 0.08) and smoking (p = 0.075) as negative prog-nostic factors for tunnel survival.

3. Molar ri 2. Molar ri 1. Molar ri 1. Molar le 2. Molar le 3. Molar le
UJ 0 0% 0 0% 1 1.7% 4 7.1% 1 1.7% 0 0%
LJ 1 1.7% 4 7.1% 15 26.8% 20 35.7% 10 17.9% 0 0%
Tab. 1 Distribution of teeth with tunnel preparations by type and jaw (n=56 teeth)

3. Molar ri 2. Molar ri 1. Molar ri 1. Molar le 2. Molar le 3. Molar le
UJ 0 0% 0 0% 0 0% 1 1.7% 0 0% 0 0%
LJ 1 1.7% 1 1.7% 1 1.7% 3 5.4% 2 3.6% 0 0%
Tab. 2 Distribution of teeth with tunnel preparations by type and jaw (n=56 teeth)

Estimate Standard
deviation
t-value p
Intercept 46.181 7.688 6.007 0.000
SPT 13.903 7.947 1.749 0.080
Smoking -6.880 3.858 -1.783 0.075
Tab. 3 Multilevel-Regression-analysis: dependent variable: survival time of tunnels (n=41 patients/56 teeth)

Fig. 7 82 month postoperative

Conclusions

After an observation period of 50.7±22.6 months 48 of 56 tunnel preparations were still in function (86%). Frequent STP is a positive, smoking a negative prognostic factor for tunnel preparations.


This Poster was submitted by Dr. Jens Kaltschmitt.

Correspondence address:
Dr. Jens Kaltschmitt
Sektion Parodontologie
Poliklinik für Zahnerhaltungskunde, Klinik für Mund-, Zahn- und Kieferkrankheiten
Universitätsklinikum Heidelberg
Im Neuenheimer Feld 400
69120 Heidelberg