Evaluating Change of Marginal Bone Height with Cone-Beam Computed Tomography Following Surgical Treatment with Guided Tissue Regeneration (Bone Grafting) or Access Flap Alone: A Retrospective Study

Abstract

Background and Objectives: This study aimed to evaluate the change of bone height following treatment of human intrabony defects with guided tissue regeneration (GTR) with bone grafting or access flap alone by cone-beam computed tomography (CBCT) scan. Materials and methods: This study was conducted as a retrospective longitudinal study. In this study, a total of 2281 teeth sites were included: the GTR group had 1210 sites, and the Flap group had 1071 sites. In the GTR group, demineralized freeze-dried bone (DFDBA) particles in combination with resorbable collagen membrane were used. No regenerative material was applied to the Flap group. CBCT images were taken twice at baseline and at least 2.5 months postoperatively. Bone heights were measured using software on CBCT images. Results: The bony change between the GTR and Flap groups was significantly different (p = 0.00001). Both males and females in the GTR group had smaller bone loss than in the Flap group. In age groups, significant differences of bony height between the GTR and Flap groups were observed in the subgroups consisting of those 29–45 and 46–53 years old. The non-smoking subjects in the GTR group had higher bone heights than those in the Flap group. In the absence of systemic disease and medicine, bone formation was higher in the GTR group than in the Flap group. In terms of oral position, the #14–17, #34–37, and #44–47 subgroups of the GTR group showed higher levels of bone heights than those of the Flap group. Conclusions. The results of this study indicated that the GTR procedure offers the additional benefit of higher bone heights than the Flap procedure does.

Regeneration of Intrabony Defects Using a Novel Magnesium Membrane

“…However, some authors have reported that the use of a collagen membrane in combination with xenograft provides no additional benefit when applied to large vertical defects [12,39]. Nevertheless, the use of a resorbable membrane provides a better clinical outcome in comparison to open-flap debridement performed alone [12,40,41]. The lack of clinical benefit of using a collagen membrane when used in combination with a bone graft for the vertical augmentation of IBDs could be associated with its low mechanical strength and inability to resist the pressure exerted on the augmentation material from the overlying soft tissue [13].…”

Assessment of Bone Height Changes Based on the Cone–Beam Computed Tomography Following Intentional Replantation for Periodontally Compromised Teeth

“…A serial number was assigned to each section of the CBCT images to prove the consistency of the measurements. [ 21 ] All pre- and postoperative bone height measurements were performed by the first tester (S.-h.P.). The second tester (S.-H.P.)…”

“…Cone–beam computed tomography (CBCT) has been proposed to overcome these limitations. Lee et al evaluated the marginal bone level after GTR and open flap procedures using CBCT [ 21 ]. Previous studies have suggested that CBCT is helpful in evaluating the anatomical structure of teeth and surrounding areas before and after IR procedures [ 22 , 23 ].…”