Imaging Science and Photochemistry ›› 2020, Vol. 38 ›› Issue (4): 662-665.DOI: 10.7517/issn.1674-0475.191217

• Review and Articles • Previous Articles     Next Articles

Accuracy of Cone Beam Computed Tomography in Assessing the Therapeutic Effects of Er: YAG Laser with Guided Tissue Regeneration on Furcation Involvements of Mandibular Molars

WANG Jinhe   

  1. Medical Imaging Department, The Second Hospital of Bazhou, Bazhou 065700, Hebei, P. R. China
  • Received:2019-12-13 Revised:2020-01-22 Online:2020-07-15 Published:2020-07-15

Abstract: In this paper, we discussed the effect of cone beam CT in assessing the therapeutic effects of Er:YAG laser with guided tissue regeneration (GTR)on furcation involvements of mandibular molars. 30 patients with furcation involvement of mandibular molars (degree Ⅱ) were divided randomly into group C (treated with GTR alone) and group L (treated with Er:YAG laser combined with GTR). Sulus bleeding index (SBI), gingival recession (GR), keratinized gingival (KG), probing pocket depth (PPD), horizontal clinical attachment loss (CAL-H), vertical clinical attachment loss(CAL-V) and cone beam CT measurement indexes such as vertical bone loss (BL-V), horizontal bone loss (BL-H) were observed and compared between the two groups. The results showed that SBI decreased and GR increased in both groups (P<0.05) one year after surgery. PPD, CAL-H and CAL-V decreased in both groups (P<0.05),the changes of group L were greater than those of group C (P<0.05). There were no statistical differences in the pre-operative conical beam CT measurement indexes such as BL-V and BL-H in the two groups (P>0.05). BL-V and BL-H improved one year after operation in both groups (P<0.05), and there were statistical differences in the improvements between the two groups (P<0.05). The results indicate that Er:YAG laser combined with GTR is better than GTR alone in the treatment of furcation involvements of mandibular molars. Cone beam CT has certain application value in assessing the therapeutic effects of Er:YAG laser combined with GTR in the treatment of furcation defect.

Key words: cone beam CT, Er:YAG laser, guided tissue regeneration, furcation defect, mandibular molars