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Effect of the size of the bony access window and the collagen barrier over the window in sinus floor elevation: a preclinical investigation in a rabbit sinus model

  • Sim, Jeong-Eun (Department of Dentistry, Graduate School, Kyung Hee University) ;
  • Kim, Sangyup (Department of Dentistry, Graduate School, Kyung Hee University) ;
  • Hong, Ji-Youn (Department of Periodontology, Periodontal-Implant Clinical Research Institute, School of Dentistry, Kyung Hee University) ;
  • Shin, Seung-Il (Department of Periodontology, Periodontal-Implant Clinical Research Institute, School of Dentistry, Kyung Hee University) ;
  • Chung, Jong-Hyuk (Department of Periodontology, Periodontal-Implant Clinical Research Institute, School of Dentistry, Kyung Hee University) ;
  • Lim, Hyun-Chang (Department of Periodontology, Periodontal-Implant Clinical Research Institute, School of Dentistry, Kyung Hee University)
  • Received : 2021.11.03
  • Accepted : 2022.03.02
  • Published : 2022.08.31

Abstract

Purpose: The aim of this study was to investigate the effect of (1) the size of the bony access window and (2) collagen membrane coverage over the window in sinus floor elevation in a rabbit sinus model. Methods: Small bony access windows (SW; ø 2.8 mm) were made in 6 rabbits and large windows (LW; ø 6 mm) in 6 other rabbits. Both sinuses in each rabbit were allocated to groups with or without coverage of a collagen membrane (CM) on the window, resulting in 4 groups: SW, LW, SW+CM, and LW+CM. After 4 weeks of healing, micro-computed tomographic, histologic, and histomorphometric analyses were performed. Results: Bony healing in the window area was incomplete in all groups, but most bone graft particles were well confined in the augmented cavity. Histologically, the pattern of new bone formation was similar in all groups. Histomorphometrically, the percentage of newly formed bone was greater in the groups with CM than in the groups without CM, and in the groups with SW than in the groups with LW (12.92%±6.40% in the SW+CM group, 4.21%±7.73% in the SW group, 10.45%±4.81% in the LW+CM group, 11.77%±3.83% in the LW group). The above differences were not statistically significant (P>0.05). Conclusions: The combination of a small bony access window and the use of a collagen membrane over the window favored new bone formation compared to other groups, but this result should be further investigated due to the limitations of the present animal model.

Keywords

Acknowledgement

The authors appreciate the research team at the Department of Periodontology, Kyung Hee University. The bone substitute materials (Maxpore) were kindly supported by Shinhung.

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