Treatment of horizontal defect with and without platelet-rich fibrin matrix: A randomized comparative clinical study

Supra-Alveolar Bone Regeneration: Progress, Challenges, and Future Perspectives

Periodontitis is a highly prevalent disease that damages the supporting tissues of a tooth, including the alveolar bone. Alveolar bone loss owing to periodontitis is broadly categorized as supra-alveolar and intra-alveolar bone loss. In intra-alveolar bone loss, the defect has an angular or oblique orientation to the long axis of the tooth in an apical direction. In contrast, the defect is perpendicular to the long axis of the tooth in supra-alveolar bone loss. Unlike intra-alveolar bone defects, supra-alveolar bone defects lack supporting adjacent space, which makes supra-alveolar bone regeneration more challenging. In addition, the limited availability of resources in terms of vascularity and underlying tissues is another obstacle to supra-alveolar bone regeneration. Currently, supra-alveolar bone loss is the least predictable periodontal defect type in regenerative periodontal therapy. In addition, supra-alveolar bone loss is much more common than other alveolar bone loss. Despite its prevalence, research on supra-alveolar bone regeneration remains sparse, indicating an unmet need for significant research efforts in this area. This review summarize recent advances, obstacles, and future directions in the field of supra-alveolar bone regeneration. We discuss the biomaterials, bioactive molecules, and cells that have been tested for supra-alveolar bone regeneration, followed by pre-clinical and clinical approaches employed in this field. Additionally, we highlight obstacles and present future directions that will propel supra-alveolar bone research forward.

Single-flap approach versus without concentrate growth factor in the treatment of periodontal supra-osseous defects: A randomized controlled clinical trial

Objectives

We aimed to compare treatment outcomes of periodontal supra-bony defects using single flap (SFA) plus concentrate growth factor versus SFA alone.

Methods

32 supra-bony periodontal defects were randomly assigned to test and control groups. Outcome variables were clinical attachment level (primary outcome). Probing pocket depths, gingival recessions, bone gain, post-surgical pain using visual analogue scale and wound healing index were recorded as secondary outcomes. Clinical and radiographic assessments were recorded at baseline and 6 months after treatment, whereas pain score and wound healing index were recorded within 10 days after surgery.

Results

Test group showed a significant improvement in all tested parameters compared to control group (P-value ≤ 0.05). Better patient centered outcomes (wound healing and pain scores) were highly achieved in the test group compared to controls.

Conclusion

The tested combined approach offers better periodontal and patient centered treatment outcomes in management of periodontal supra-bony defects.

Intramarrow penetration synergized with advanced platelet-rich fibrin in periodontal regeneration: A randomized controlled trial

Background

Intramarrow penetration (IMP) is one of the recent treatment protocol where decortication is performed to stimulate osteogenic cells. IMP improves the blood supply and the inherent osteogenic properties of the vital bone and has the advantages of minimal surgical invasion, time, and cost. Incorporation of IMP in the regeneration of periodontal defects is very scarce. Hence, the present study aimed to evaluate the involvement of IMP and advanced platelet-rich fibrin (A-PRF) in the regenerative outcomes in the treatment of intrabony defects.

Materials and Methods

In the present randomized controlled trial, 20 periodontitis patients with 20 defects were randomly allotted into two groups: group I open flap debridement (OFD) and A-PRF, group II OFD, intramarrow debridement, and A-PRF. Clinical parameters recorded were plaque index (PI), gingival index (GI), and clinical attachment level (CAL) probing depth. Radiographic parameters were defect depth, defect resolution, and change in alveolar crest height. Values were tabulated and subjected to statistical analysis. Paired and unpaired t-tests were performed for intra and intergroup comparisons. P <0.05 was set as statistically significant.

Results

Intragroup comparisons showed a significant reduction (P < 0.05) in probing pocket depth, GI, PI, gain in CAL, and greater bone fill in both the groups from baseline to 6 months postoperative. Intergroup comparisons were not statistically significant (P > 0.05).

Conclusion

Within limitations, both treatment modalities stand good, but utilization of IMP along with A-PRF results in effective regenerative outcome in intrabony defects because of its stimulation of osteogenic properties.

Combined Effect of Platelet-Rich Fibrin Matrix (PRFM) and Demineralized Freeze-Dried Bone Allograft (DFDBA) in Immediate Implant Placement: A Single-Arm Clinical Trial

Introduction

Placement of immediate implants in contrast to delayed implant placement may be favorable. The factors contributing to this are shortened overall treatment time, aid in ideal orientation and fixture placement, bone preservation following extraction, and achieving optimal aesthetics involving soft tissue. However, the gap distance between the surface of the implant and the buccal bony wall during implant placement is critical for subsequent bone healing in a fresh extraction socket. Considering that as the gap broadens, the amount of bone-to-implant contact (BIC) decreases, causing an apical shift of the highest bone-implant contact. Incorporating a bone substitute material (BSM) within the fixture-socket gap preserves alveolar ridge volume by minimizing socket remodeling and encouraging de-novo bone formation.

Aim and objectives

To evaluate the efficacy of platelet-rich fibrin matrix (PRFM) and demineralized freeze-dried bone allograft (DFDBA) in fresh extraction socket with simultaneous implant placement.

Methods

Implants were immediately placed in 12 patients following a two-stage submerged protocol. The combination of PRFM and DFDBA was used to fill the gap between the implant body and the surrounding socket wall. The final restoration was placed after 3 months following implant placement. The full mouth plaque, gingival bleeding index, and gingival esthetics scores were assessed at baseline, 3, and 6 months. The crestal changes were evaluated using intraoral periapical radiographs (IOPA) at baseline, 3, and 6 months. Cone beam computed tomography (CBCT) images were obtained at baseline and 6 months after implant loading to analyze the buccolingual changes.

Results

At 6 months follow-up, the coronal bone remodeling detected on CBCT revealed a minimal (0.1 mm) narrowing of the alveolar ridge in a buccolingual direction, with a mean bone loss of 0.10+0.09, which was statistically non-significant (p > 0.05). Implant success was 100% at 6 months after loading as determined by Akbrektsson’s criteria for implant success.

Conclusions

The adjunctive use of PRFM with DFDBA following immediate implant placement yielded a significant reduction in bone resorption and maintenance of buccolingual dimensions.

Evaluation of Platelet-Rich Fibrin Matrix as a Regenerative Material in the Surgical Management of Human Periodontal Intraosseous Defects - A Randomized Controlled Trial

Background

Platelet-rich fibrin matrix (PRFM) has not been extensively studied as other platelet concentrates such as Choukron's platelet-rich fibrin (PRF). This randomized controlled trial aimed to evaluate PRFM regenerative ability in human periodontal intrabony defects.

Materials and Methods

Fifteen patients (age: 30-55 years) having probing pocket depth (PPD) ≥6 mm, and radiographic evidence of bilateral vertical intrabony defects were recruited. A split-mouth design was used in each patient; one quadrant of the arch was treated with open flap debridement (OFD) alone (control group) and the other quadrant with OFD + PRFM (test group). The PRFM was prepared by dual-spin technology using a patented thixotropic separator gel. Outcome measures comprising plaque index, gingival index (GI), PPD, clinical attachment level (CAL), depth of the defect, defect fill (DF), and percentage of DF (PDF) were recorded at baseline, after 3 months and 6 months. The parameters were applicably analyzed using the Friedman test, Fisher's exact test, t-test, paired t-test, repeated measures ANOVA, and Post Hoc-Bonferroni correction.

Results

The GI, a net reduction in CAL, and PPD of the test group were significantly better than the control group at 3 months and 6 months (P < 0.05), while DF and PDF showed significant results at 6 months (P < 0.05). A consistent early wound healing index of 1 at 1 week was displayed in the test group (66.7%) in comparison to the control group (33.7%).

Conclusion

PRFM can be a clinically significant periodontal regenerative material in the treatment of vertical intraosseous defects.