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Radiographic evaluation of different techniques for ridge preservation after tooth extraction: a randomized controlled clinical trial

Authors


  • Conflict of interest and source of funding statement

    This study was predominantly supported by the Clinic of Fixed and Removable Prosthodontics and Dental Material Science, the Clinic of Preventive Dentistry, Periodontology and Cariology, both Center of Dental Medicine, University of Zurich, Zurich, Switzerland and in part by research grants of Geistlich Pharma AG, Wolhusen, Switzerland and Degradable Solutions AG, Schlieren, Switzerland. All patients were treated and all analyses performed at the Clinic of Fixed and Removable Prosthodontics and Dental Material Science, the Clinic of Preventive Dentistry, Periodontology and Cariology, both Center of Dental Medicine, University of Zurich, Zurich, Switzerland. The authors declare that they have no conflicts of interests.

Address:

Ronald E. Jung

Clinic of Fixed and Removable Prosthodontics and

Dental Material Science

Center of Dental Medicine, University of Zurich

Plattenstrasse 11

CH-8032 Zurich, Switzerland

E-mail: ronald.jung@zzm.uzh.ch

Abstract

Objective

To evaluate the radiographic changes of the alveolar ridge following application of different ridge preservation techniques 6 months after tooth extraction.

Materials and Methods

Four treatment modalities were randomly assigned in 40 patients: β-tricalcium-phosphate-particles with polylactid coating (β-TCP), demineralized bovine bone mineral with 10% collagen covered with a collagen matrix (DBBM-C/CM), DBBM-C covered with an autogenous soft-tissue graft (DBBM-C/PG) and spontaneous healing (control). Cone-beam computed tomography scans were performed after treatment and 6 months later.

Results

After 6 months, the vertical changes ranged between −0.6 mm (−10.2%) for control and a gain of 0.3 mm (5.6%) for DBBM-C/PG on the lingual side, and between −2.0 mm (−20.9%) for β-TCP and a gain of 1.2 mm (8.1%) for DBBM-C/PG on the buccal side. The most accentuated ridge width changes were recorded 1 mm below the crest: −3.3 mm (−43.3%, C), −6.1 mm (−77.5%, β-TCP), −1.2 mm (−17.4%, DBBM-C/CM) and −1.4 mm (−18.1%, DBBM-C/PG). At all three levels, DBBM-C with either CM or PG was not significantly differing (p > 0.05), while most other differences between the groups reached statistical significance (p < 0.05).

Conclusions

Application of DBBM-C, covered with CM or PG, resulted in less vertical and horizontal changes of the alveolar ridge as compared with controls 6 months after extraction.

Ancillary