1.
Efficacy and Safety of Concentrated Growth Factors and Platelet- Rich Fibrin on Stability and Bone Regeneration in Patients with Immediate Dental Implants: A Randomized Controlled Trial
Gaur S, Chugh A, Chaudhry K, Bajpayee A, Jain G, Chugh VK, Kumar P, Singh S
The International journal of oral & maxillofacial implants. 2022;37(4):784-792
Abstract
PURPOSE Immediate dental implants revolutionized the field of implant dentistry with significant advantages over conventional implants. The lack of adequate bone in the extraction socket raises the question of the appropriate timing of implant loading. Platelet concentrates have been used widely to accelerate bone regeneration in the maxillofacial region. This study evaluates the effect of platelet concentrates on bone healing and implant stability in the maxillary and mandibular molar regions. Bone regeneration is regulated by several growth factors, particularly vascular endothelial growth factor (VEGF) and transforming growth factor-β1 (TGF-β1); therefore, quantification of these factors in platelet concentrates and its correlation with bone healing has been assessed in this study. MATERIALS AND METHODS The primary aim of this randomized clinical trial was to compare the stability of immediate dental implants in the maxillary and mandibular molar regions treated with platelet-rich fibrin (PRF) versus concentrated growth factors (CGF) using resonance frequency analysis (RFA). The secondary objectives were to evaluate the bone regenerate around implants with the use of PRF and CGF and to quantify growth factors VEGF and TGF-β1 in the prepared CGF and PRF and their correlation with bone healing, if any. A total of 36 patients were randomized into three groups (12 each): control, PRF, and CGF. In all patients, immediate implants were placed either with or without platelet concentrate (PRF or CGF). Implant stability was measured using RFA immediately postoperatively and at 4, 8, and 12 or 16 weeks (12 weeks for mandible and 16 weeks for maxilla) postoperatively. Radiodensity and the bone gap (horizontal/vertical) were measured on intraoral periapical radiographs immediately postoperatively and at 8 weeks and 12 or 16 weeks postoperatively. RESULTS On comparing the implant stability quotient (ISQ), radiodensity/grayscale (GS), and horizontal and vertical bone gap (HG and VG), there was no significant difference noted between the three groups at any point in time. On ISQ analysis at 8 weeks, the control group showed a significant improvement (P = .04), whereas at 12 or 16 weeks, significant improvement was seen in PRF (P = .03) and CGF groups (P = .02). In GS assessment, only the control group showed significant improvement at 12 or 16 weeks (P = .009). In horizontal and vertical bone gap analysis all three groups showed significant improvement at 8 weeks (control [P < .001], PRF [P = .001], CGF [P = .01]) as well as 12 or 16 weeks (control [P < .001], PRF [P < .001], CGF [P = .006]). The enzyme-linked immunosorbent assay (ELISA) quantification of VEGF and TGF-β1 showed significant concentration of VEGF in PRF as compared to the plasma, while concentration of TGF-β1 was found to be comparable in both groups. CONCLUSION The application of platelet concentrates seems to enhance stability of implants, but intergroup results were nonsignificant at all time points. There was no statistically significant difference between the three groups when comparing quality (radiodensity/grayscale) and quantity (horizontal and vertical gap reduction) of bone regenerate. Studies with larger sample sizes are required to make conclusive assertions regarding efficacy of platelet concentrates in dental implants.
2.
Platelet-Rich Fibrin for Hard- and Soft-Tissue Healing in Mandibular Third Molar Extraction Socket
Sybil D, Sawai M, Faisal M, Singh S, Jain V
Annals of maxillofacial surgery. 2020;10(1):102-107
Abstract
BACKGROUND Successful management of patients reporting with extreme sensitivity in second molar after surgical extraction of deeply impacted mandibular third molar poses a big challenge to oral surgeons and periodontists worldwide. A variety of grafts, barrier membranes, and guided tissue regeneration techniques have been used postsurgically for soft- and hard-tissue formation. In the current study, platelet-rich fibrin (PRF), a second-generation platelet aggregate, was assessed for its effectiveness in promoting hard- and soft-tissue healing. OBJECTIVE The aim of the study was to evaluate the efficacy of PRF in hard- and soft-tissue healing after extraction of mandibular third molar. MATERIALS AND METHODS Bilateral surgical disimpaction of mandibular third molar was done on 25 patients. In every patient, randomly allocated test side received PRF and the other side acted as control. Pain, edema, tenderness, sensitivity, Sulcus Bleeding Index (SBI), Plaque Index, clinical attachment level (CAL), probing depth, and bone height were measured at different intervals for a maximum period of 6 months. RESULTS There was a statistically significant improvement in patients' signs and symptoms of pain, tenderness, edema, and sensitivity with the use of PRF. A statistically significant improvement was seen in SBI, Plaque Index, and probing depths, while CALs and bone height were not influenced by PRF use. CONCLUSION PRF is a very viable and useful biomaterial for soft-tissue healing and relieving patient symptoms, however, it does not help in hard-tissue healing with respect to cortical bone.
3.
A comparison of two pulp revascularization techniques using platelet-rich plasma and whole blood clot
Ramachandran N, Singh S, Podar R, Kulkarni G, Shetty R, Chandrasekhar P
Journal of conservative dentistry : JCD. 2020;23(6):637-643
Abstract
AIM: The aim of this preliminary study was to compare outcomes of two regenerative endodontic protocols in necrotic teeth with open apices. METHODOLOGY Forty teeth with open apices in patients with an age range of 15-54 were randomly distributed in two groups: group 1, with whole blood clot in the canal (n=20) and group 2, whole blood with Platelet rich plasma (PRP) in the canal (n=20). Clinical and radiological follow up assessments were undertaken over a period ranging from 6 months to one year. Radiographic Root Area (RRA) was measured using the freeware ImageJ. Statistical analysis was performed using the independent samples t test and the Chi-squared test, the significance level was set at p=0.05. RESULTS There was no difference in the percentage change in RRA between the PRP group and whole blood-clot + PRP group. CONCLUSION Whole blood clot and PRP are comparable on the grounds of percentage change in RRA and there is no statistically significant difference between the two in a follow-up period of up to one year.
4.
Evaluation of the relative efficacy of autologous platelet-rich fibrin membrane in combination with beta-tricalcium phosphate (Septodont- resorbable tissue replacement) alloplast versus beta-TCP alloplast alone in the treatment of grade II furcation defects
Rani N, Kaushal S, Singh S, Nandlal, Khan MA, Pathak AK
National journal of maxillofacial surgery. 2018;9((2):):196-204.
Abstract
Introduction: Platelet-rich fibrin (PRF) is considered as the second-generation platelet concentrate, contains combined properties of fibrin, platelets, leukocytes, growth factors, and cytokines that make it as healing biomaterial with incredible potential for hard tissue and soft tissue regeneration. The present study was aimed to evaluate the effectiveness of PRF with beta-tricalcium phosphate (beta-TCP) graft (R. T. R) and compare it with beta-TCP allograft alone in the treatment of mandibular Grade II furcation defects. Material and Methods: A total of 20 mandibular Grade II furcation defects sites were assigned in the study and treated with either beta-TCP alone (Group I) or beta-TCP with PRF membrane (Group II). The clinical parameters analyzed were probing pocket depth (PPD), clinical attachment level (CAL), gingival recession (GR), horizontal defect depth (HDD), and vertical defect depth (VDD), recorded baseline and at 6 months reentry. Results: At 6 months, both groups showed statistically significant results for all parameters from their baseline value, although intergroup changes were statistically insignificant. In Group I, gain in CAL was 2.80 +/- 1.40 and in Group II it was 3.00 +/- 1.44. Bone fill in Group I was VDD (3.50 +/- 2.12) and HDD (3.70 +/- 0.67), whereas Group II showed VDD (3.70 +/- 1.57) and HDD (4.0 +/- 0.88), respectively. PPD reduction was higher in Group I (3.50 +/- 2.27) than Group II (2.80 +/- 1.93). At reentry GR was established, Group I showed higher GR (0.70 +/- 0.67) and Group II (0.40 +/- 0.52). Conclusions: Significant improvement was found in both groups, but the combination of PRF with beta-TCP allograft led to more favorable improvement in the management of Grade II furcation defect except PPD.