Abstract

The purpose of this systematic review was to analyze sinus lifting procedures and to compare the efficiency of this treatment associated with the second generation of platelet-rich fibrin related to its effects on bone gain and to clarify the regenerative efficacy in sinus lift procedure, whether alone or as a coadjutant to other bone graft materials. The PICOT question was, "In clinical studies with patients needing a maxillary sinus lift (P), does the use of PRF either alone (I) or in conjunction with other biomaterials (C) improve the clinical outcome associated with bone gain and density (O), with at least three months of follow-up (T)?" An electronic search was conducted in the MEDLINE (PubMed), Science Direct, and Scopus databases through a search strategy. A total of 443 articles were obtained from the electronic database search. Sixteen articles met all criteria and were included in this review. Within the limitation of this study and interpreting the results carefully, it was suggested that a higher risk for implant failure after a sinus elevation might be seen in patients with residual bone ≤4 mm, and PRF application was effective, suggesting reducing the time needed for new bone formation.

Abstract

OBJECTIVE To evaluate the clinical efficacy of intralesional platelet-rich plasma (PRP) injections compared to intralesional triamcinolone acetonide (TA) injections in the treatment of erosive oral lichen planus (EOLP). MATERIAL AND METHODS Twenty patients with EOLP were assigned randomly to either PRP or TA group. Patients received weekly intralesional injections for 4 weeks, and then followed up for 3 months on regular visits every 2 weeks. Pain scores using numerical pain score and clinical score were recorded by a blinded assessor each visit for all patients and remission score at the end of the trial was recorded. RESULTS Both groups showed significant improvement in the clinical parameters (pain and clinical score) "p = .001." Regarding remission of the lesions, 80% of patients in the PRP group showed complete remission compared to 70% in the TA group. However, there is no statistical significance when comparing the two groups in pain score, clinical score, or remission. CONCLUSIONS PRP injections could be considered as an effective alternative single treatment modality for EOLP. The protocol for this study registered in Clinicaltrials.gov registry under the identifier number: NCT03293368.

Abstract

BACKGROUND Several biomaterials have been suggested to augment the jumping gap during immediate implant placement. PURPOSE The aim of this study was to compare the effect of xenograft or platelet derived growth factor (PRF) to graft the jumping gap in immediate implant placement in the maxillary premolar region. MATERIALS AND METHODS Twenty patients underwent atraumatic extraction followed by immediate placement. The patients were equally divided into two groups. The first group received xenograft as a jumping gap filling material. The second group received PRF to graft the jumping gap. All patients received preoperative, immediate postoperative, and 6 months postoperative cone beam CT scan (CBCT). Implant stability quotient ISQ values were taken for the installed implants immediate postoperative and at 6 months. RESULTS Implants receiving PRF as a jumping gap graft material demonstrated a significantly greater amount of crestal bone loss 1.85 ± 0.89 mm as compared to xenograft group 0.77 ± 0.32 mm (t = 3.52, p = 0.005). PRF group showed significantly greater reduction in buccopalatal direction 1.63 mm as compared to xenograft group 0.59 mm (t = 4014, p <0.001). ISQ values were similar immediately postoperative (t = 0.070, p = 0.945) while the ISQ values were significantly lower in PRF group as compared to xenograft graft at the six-month interval (t = 0.248, p = 0.023). CONCLUSION The use of xenograft material as a jumping gap filling material resulted in superior results compared to PRF with regards to crestal bone loss, buccolingual socket reduction, and ISQ values.

Abstract

CONTEXT Status of bone-implant interface or osseointegration can be assessed by using resonance frequency analysis (RFA), which measures implant stability. A modified implant surface can significantly enhance osseointegration and reduce healing period. Platelet-rich fibrin (PRF) consists of fibrin mesh with entrapped platelets and leukocytes that release a huge number of growth factors which contribute to wound healing and tissue regeneration. AIMS The present study aims to evaluate the effect of PRF on osseointegration in terms of implant stability. SETTINGS AND DESIGN This was a split-mouth randomized clinical trial. MATERIALS AND METHODS Sixty surgical sites were divided randomly into two groups. In Group 1 (thirty sites), PRF was placed in osteotomy sites before implant placement whereas no PRF was placed in Group 2 (thirty sites). Stability was measured using RFA in terms of implant stability quotient (ISQ) at baseline, 1 week, 1 month, and 3 months. STATISTICAL ANALYSIS Intergroup comparison was done using Mann-Whitney U-test. Intragroup comparison was done using Friedman's test followed by pairwise comparison using Wilcoxon signed-rank test. RESULTS On intergroup comparison, Group 1 showed higher values for ISQ which were statistically significant (P < 0.05) at 1 week and 1 month. No significant difference (P > 0.05) was found at baseline and 3 months. Intragroup comparison and further pairwise comparison revealed a highly significant difference for values between all pairs of time intervals (P < 0.01) with higher values at 3 months. CONCLUSIONS PRF has a significant effect on osseointegration of dental implants during the early healing period prior to loading.

Abstract

BACKGROUND/PURPOSE Temporomandibular joint disc displacement is the most frequently reported temporomandibular disorder that may severely impair quality of life and can be challenging to treat. This study aimed to evaluate and compare the efficiency of intra-articular injection of injectable platelet rich fibrin (i-PRF) following arthrocentesis or arthrocentesis alone in treatment of patients with TMJ disc displacement with reduction. MATERIALS AND METHODS Forty patients for a total of forty joints with reducible anterior disc displacement, as confirmed by Magnetic Resonance Imaging (MRI) were selected and divided into 2 equal groups. In group I (control group), arthrocentesis alone was performed with Ringer solution. In group II (study group), a combination of arthrocentesis and intra-articular injection with 1.5 ml i-PRF was performed. The outcome variables included pain intensity evaluated with a visual analogue scale, inter-incisal opening, lateral movement evaluated in millimeters, and clicking. Assessments were done pre-operatively, and 1 week, 3 months, and 6 months postoperatively. RESULTS There was statistically significant reduction in pain intensity and clicking sound and increase in mouth opening and lateral movement in i-PRF group when compared to arthrocentesis group. In addition, the differences between preoperative and postoperative status in all the measured parameters were statistically significant within the study and the control group throughout the postoperative period. CONCLUSION The combination of i-PRF with arthrocentesis is a safe and effective method in the treatment of TMJ disc displacement with reduction.

Abstract

Background Several procedures have been used to enhance thin gingival phenotype and the majority of these procedures have been surgical. A new minimally invasive approach that involved multiple injections of platelet-rich fibrin (i-PRF) to enhance the thin gingival phenotype has been proposed. As the hyaluronic acid (HA) and the i-PRF share similar properties in terms of promoting periodontal regeneration, the present trial aimed to evaluate the effectiveness of multiple injections of the i-PRF in patients with thin gingival phenotypes in comparison with those of the HA in increasing the gingival thickness (GT) and the keratinized tissue width (KTW). Materials and methods Eighty-four sites from 14 systematically healthy patients who had thin gingival phenotypes (GT ≤1 mm) were included in this split-mouth randomized controlled trial. For each patient, each side of the anterior mandible was randomly allocated to one of the two materials (HA or i-PRF). In the HA group, the selected sites of the gingiva were injected with cross-linked HA using a 30-gauge microneedle. In the i-PRF group, the i-PRF was injected in the same manner. This procedure was repeated in both groups three times with intervals of 7 days. The GT, KTW, and periodontal indices: gingival index (GI), bleeding on probing (BOP), and probing depth (PD) were measured at baseline, 1 month, and 3 months following the initial injection. Results The GT increased significantly in both groups at the three assessment times (p<0.001). The KTW also showed a statistically significant increase in the intragroup comparisons in both groups (p<0.05). No statistically significant difference was observed between the two groups at the three assessment times for the GT and the KTW (p>0.05). The GI significantly decreased after 1 month and 3 months compared to the baseline values in both groups (p<0.05). The intergroup comparisons for the GI revealed no statistically significant differences at the three assessment times (p>0.05). As for the BOP and the PD, no statistically significant differences were found between the three assessment times (p>0.05) and between the two groups at each assessment time (p>0.05). Conclusion Multiple injections of the i-PRF and the HA in the thin gingival phenotype resulted in an increased GT and increased KTW, with no statistically significant differences between the two methods. Both minimally invasive techniques were more effective in improving the GT rather than the KTW.

Abstract

BACKGROUND Postoperative morbidities following impacted lower third molar (M3) surgery is of concern. The influence of platelets concentrates on postoperative inflammatory sequelae of M3 is promising. However, the comparative efficacy of platelet-rich fibrin (PRF) to platelet-rich plasma (PRP) in ameliorating postoperative morbidities remains controversial. OBJECTIVE The study aimed to compare the bioactive effects of PRP and PRF on postoperative pain, swelling, and trismus after impacted M3 surgery. SUBJECTS AND METHODS A randomized, parallel-group study of 50 subjects was designed. Preoperative and postoperative swelling, degree of mouth opening and pain were assessed on days 1, 3, and 7. Linear mixed model analysis was used to compare the effects of treatment, time-point assessment within the group, and treatment with time interaction. RESULTS Interaction estimates show statistically significant pain reduction with PRF (p = 0.00, 95% CI [-0.95, -0.25]. Trismus based on a time-point assessment within the PRP and PRF groups was significantly reduced (p =0.01, 95% CI [0.06, 0.38]) and (p = 0.00, 95% CI [0.12, 0.44]) respectively. Facial swelling within the PRP and PRF groups were significantly decreased (p = 0.00, 95% CI [-0.30, -0.06]) and (p = 0.00, 95% CI [-0.37, -0.13) respectively. There were no statistically significant differences between the groups for trismus and swelling. Age was a significant predictor of trismus in both groups (p = 0.04, 95% CI [-0.07, -0.01]). CONCLUSION PRF was more effective in reducing postoperative pain compared to PRP. Furthermore, the study shows that platelet concentrates positively modulate post-inflammatory sequelae of impacted M3 surgery.

Abstract

PURPOSE This study evaluated  the effects of advanced platelet-rich fibrin (A-PRF +) on the healing of upper third molar post-extraction sockets. METHODS Sixteen patients who underwent extractions of the upper third molars (18 and 28) were included in this randomized split-mouth study. The alveoli on the test side were filled with A-PRF + , while the control side was maintained with blood clot. The side that received treatment was randomly defined. Alveolar bone regeneration was evaluated by CBCT scans to assess healing stage, bone density, and fractal analysis 1 week and 90 days post-extraction. Additionally, pain, edema, bleeding, and soft tissue alveolar repair were evaluated by clinical analyses 3, 7, 14, 30, and 90 days after the surgical procedure using a visual analog scale. RESULTS There were no clinical differences regarding treatments in any experimental period. In the tomographic evaluation, at 7 days, the alveoli treated with A-PRF + presented a suggestive sign of higher bone density than the control alveoli, which was not confirmed 90 days after the surgical procedure. CONCLUSION Thus, the use of A-PRF + does not demonstrate a clinical advantage in the repair of post-extraction sockets of upper third molars.

Abstract

OBJECTIVE The aim of this study was to assess the clinical effects of concentrated growth factor (CGF) in combination with coronally advanced flap (CAF) compared with platelet rich fibrin (PRF)+CAF for the treatment of multiple adjacent gingival recessions (GRs). METHOD AND MATERIALS 18 subjects with total of 76 Type I GRs in the maxilla were included. Recessions were randomly treated according to a split-mouth design by means of CGF+CAF (39 defects, CGF side), or PRF+CAF (37 defects, PRF side). Clinical outcomes were evaluated at 6 months. RESULTS The mean root coverage was 86.32% and 80.86%, and complete root coverage was 61.53% (24/39) and 51.35% (19/37) for CGF side and PRF side, respectively, at 6 months. Statistically significant gains were observed in the terms of clinical attachment level, recession depth, keratinized gingiva width, gingival thickness, and recession width in the both sides at 6 months compared to baseline values; no statistically significant difference was observed in these parameters between the two sides at 6 months. CONCLUSIONS According to results, the use of CGF+CAF was not superior to PRF+CAF in providing additional benefits in clinical parameters. Keratinized gingiva width and gingival thickness significantly increased with the use of CGF and PRF membranes together with CAF.

Abstract

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.