Journal of Conservative Dentistry

CASE REPORT
Year
: 2013  |  Volume : 16  |  Issue : 3  |  Page : 261--264

Combination of platelet rich fibrin, hydroxyapatite and PRF membrane in the management of large inflammatory periapical lesion


Vasundara Yayathi Shivashankar1, Dexton Antony Johns1, S Vidyanath2, George Sam3,  
1 Department of Endodontics, Government Dental College, Calicut, Kerala, India
2 Department of Oral Pathology, Government Dental College, Calicut, Kerala, India
3 Department of Periodontology, Government Dental College, Calicut, Kerala, India

Correspondence Address:
Dexton Antony Johns
Department of Endodontics, Government Dental College, Calicut, Kerala
India

Abstract

Periapical inflammatory lesion is the local response of bone around the apex of tooth that develops after the necrosis of the pulp tissue or extensive periodontal disease. The final outcome of the nature of wound healing after endodontic surgery can be repair or regeneration depending on the nature of the wound; the availability of progenitor cells; signaling molecules; and micro-environmental cues such as adhesion molecules, extracellular matrix, and associated non-collagenous protein molecules. The purpose of this case report is to add knowledge to the existing literature about the combined use of graft material [platelet rich fibrin (PRF) and hydroxyapatite (HA)] and barrier membrane in the treatment of large periapical lesion. A periapical endodontic surgery was performed on a 45 year old male patient with a swelling in the upper front teeth region and a large bony defect radiologically. The surgical defect was filled with a combination of PRF and HA bone graft crystals. The defect was covered by PRF membrane and sutured. Clinical examination revealed uneventful wound healing. Radiologically the HA crystals have been completely replaced by new bone at the end of 2 years. On the basis of the results obtained in our case report, we hypothesize that the use of PRF in conjunction with HA crystals might have accelerated the resorption of the graft crystals and would have induced the rapid rate of bone formation.



How to cite this article:
Shivashankar VY, Johns DA, Vidyanath S, Sam G. Combination of platelet rich fibrin, hydroxyapatite and PRF membrane in the management of large inflammatory periapical lesion.J Conserv Dent 2013;16:261-264


How to cite this URL:
Shivashankar VY, Johns DA, Vidyanath S, Sam G. Combination of platelet rich fibrin, hydroxyapatite and PRF membrane in the management of large inflammatory periapical lesion. J Conserv Dent [serial online] 2013 [cited 2019 Aug 22 ];16:261-264
Available from: http://www.jcd.org.in/text.asp?2013/16/3/261/111329


Full Text

 Introduction



Regeneration is defined as the reproduction or reconstitution of a lost or injured part of the body in such a way that the architecture and function of the lost or injured tissues are completely restored. [1] The final outcome of the nature of wound healing after endodontic surgery can be repair or regeneration depending on the nature of the wound; the availability of progenitor cells; signaling molecules; and micro-environmental cues such as adhesion molecules, extracellular matrix, and associated non-collagenous protein molecules. [2] Since repair is not an ideal outcome after wound healing, regenerative approaches that aim to restore the lost tissues (periodontal ligament, bone, cementum, and connective tissue) have been introduced. [3] Regenerative therapies like bone graft and barrier membranes have been used for the optimal healing of the periapical defect area after degranulation of the lesion. [4]

Porous hydroxyapatite (HA) has been used to fill the periodontal intrabony defects, which has resulted in clinically acceptable responses. [5] It has been shown that porous HA bone grafts have excellent bone conductive properties, which permit outgrowth of osteogenic cells from existing bone surfaces into the adjacent bone material. [6] Since there are no organic components contained in HA, this bone graft material does not induce any allergic reaction and is clinically very well tolerated. [7] However, true regeneration is not achieved with HA because, healing which occurs is just a connective tissue encapsulation of the graft. [8]

Barrier membranes are inert materials that maintains a confined space, which is one of the key biologic requirements for bone regeneration. [9] When a space is formed after periapical surgery, cells from the adjacent tissues will grow into this space to form their parent tissue. Membranes are placed to give preference to cells from desired tissues and to prevent cells from undesired tissues that have access to the space. [2]

Platelet rich fibrin (PRF) is an immune and platelet concentrate with specific composition, three dimensional architecture and associated biology that collects all the constituents of a blood sample to favor wound healing and immunity. [10],[11] PRF contains multitude of growth factors like platelet derived growth factor (PDGF), transforming growth factor β1 (TGF β1), insulin like growth factor (IGF), etc., exhibiting varied potent local properties such as cell migration, cell attachment, cell proliferation, and cell differentiation. [12] It has been shown as an ideal biomaterial for pulp-dentin complex regeneration. [13]

PRF is both a healing and interpositional biomaterial. As a healing material, it accelerates wound closure and mucosal healing due to fibrin bandage and growth factor release. As interpositional material, it avoids the early invagination of undesired cells, thereby behaves as a competetive barrier between desired and undesired cells. [11]

Sculean et al. [14] in their study concluded that the combination of barrier membrane and grafting materials may result in histological evidence of periodontal regeneration, predominantly bone repair. Gassling et al. proved in their study that PRF membranes are suitable for cultivation of periosteal cells for bone tissue engineering. [15] Pradeep et al. in their study concluded that when HA is combined with PRF, it increases the regenerative effects observed with PRF in the treatment of human three wall intrabony defects. [16] The purpose of this case report is to add knowledge to the existing literature about the combined use of graft material and barrier membrane in the treatment of large periapical lesion. Literature survey reveals that there is no documentation of case report using combination of PRF, HA, and PRF membrane in the management of large inflammatory periapical lesion.

 Case Report



A 45-years-old male patient came to the Department of Endodontics with a chief complaint of swelling in the upper front teeth region (teeth #7 and #8). The patient had no medical contraindication to dental treatment. Dental history revealed an incident of trauma to the upper front teeth region 5 years ago. Clinical examination revealed discolored tooth #8 with an Ellis class 2 fracture. Both the teeth #7 and #8 were sensitive to percussion test. Upon radiographic examination gigantic periapical radiolucencies were observed at the apical region of teeth #7 and #8 [Figure 1]a and [Figure 2]a.{Figure 1}{Figure 2}

The root canal treatment was performed using step back technique till an apical size of # 55 and #45 in relation to teeth #8 and #7 respectively. 5.25% sodium hypochlorite solution (Novo Dental Product Pvt Ltd, Mumbai, India) was used to irrigate the canals during the canal preparation. The root canal treatment was performed in three visits and calcium hydroxide was used as the intracanal medicament. The root canals were obturated using gutta percha (Dentsply maillefer Ballaigues) and AH 26 (Dentsply DeTrey GmbH, Philadelphia, USA) by the lateral condensation technique. After a review period of 6 months, expected healing did not occur. Hence, a periapical endodontic surgery was planned. Under local anesthesia (1:200000 adrenaline, DJ Lab, India), a full thickness mucoperiosteal flap was reflected by a sulcular incision starting from the distal of the tooth #9 to distal of the tooth #6. A large periapical defect was seen with complete loss of labial cortical plate. The lesion measured 15 mm × 16 mm × 16 mm corresponding to the length, width, and depth of the lesion [Figure 1]b. Tissue curettage was done at the defect site followed by thorough irrigation using sterile saline solution. Using #702 tapered fissure bur (SS White burs), root end resection was performed in teeth #7 and #8 and Grey mineral trioxide aggregate (MTA) (ProRoot MTA; Dentsply, Tulsa, OK, USA) was used as the root end filling material. 20 mL of blood was drawn from the patient's antecubital vein and centrifuged (REMI centrifuge machine Model R-8c with 12 × 15 mL swing out head) for 10 min under 3000 revolutions (approximately 400 g) per minute to obtain the PRF. Commercially available HA bone graft crystals (Biograft HA, IFGL Bioceramics Ltd., India) were sprinkled over the PRF gel and together the mixture was placed into defect site [Figure 1]c. PRF membrane was prepared with compresses and placed as two layers covering the edge of the defect [Figure 1]d. Flap stabilization was done followed by suturing using 3-0 black silk suture material (Sutures India Pvt. Ltd, Karnataka, India). Patient was kept under the antibiotic (amoxycillin) coverage along with Affen PLUS Tab (Dr. Reddy's Lab, Andrapradesh, India) and 0.2% chlorhexidine gluconate solution as mouth rinse for a period of 5 days. Suture removal was done 1 week later and the healing was uneventful [Figure 1]e.

Patient was reviewed at 3 months [Figure 2]b, 6 months [Figure 2]c, 1 year [Figure 2]d, and 2-year period during which there were no symptoms of pain, inflammation, or discomfort. These follow-up visits included routine intraoral examinations and professional plaque control. Radiographically, HA particles have been almost completely resorbed and replaced with new bone at the end of 2 years [Figure 2]e. Patient was completely satisfied with the results of the treatment.

 Discussion



The four critical factors that influence bone regeneration after the periapical surgery are primary wound closure, angiogenesis as a blood supply and source of undifferentiated mesenchymal cells, space maintenance, and stability of the wound (PASS principle). [17] HA has shown positive results with respect to periodontal regeneration in periapical defects. [3] It has been reported that combination of HA with PRF resulted in greater pocket depth reduction, gain in clinical attachment and defect fill than PRF used alone. [16] For this reason, we chose HA, as that it could enhance the effects of PRF by maintaining the space for tissue regeneration to occur, as well as by exerting an osteoconductive effect in the bony defect area. Bone grafts alone without a blood clot or angiogenic factors are unlikely to be capable of promoting periapical wound healing. [18] Biologically, a blood clot is a better space filler than all bone grafting materials. A blood clot is the host's own biologic product and is indispensable in tissue wound healing. Tissue wound healing would be impaired without a blood clot, [19],[20] as in a dry socket after tooth extraction. [2]

PRF is in the form of a platelet gel and can be used in conjunction with bone grafts, which offers several advantages including promoting wound healing, bone growth and maturation, graft stabilization, wound sealing, and hemostasis and improving the handling properties of graft materials. [19] PRF is a concentrated suspension of the growth factors found in platelets. These growth factors are involved in wound healing and are postulated as promoters of tissue regeneration. Clinical trials suggest that the combination of bone graft along with the growth factors in the PRF may be suitable to enhance the bone density. [19] PRF is a rich source of PDGF, TGF, and IGF, etc., In vivo application of PDGF increased bone regeneration in calvarial defects when a bio-absorbable membrane was used as a carrier. [20] TGF-stimulates bio-synthesis of type I collagen and induces deposition of bone matrix in vitro. [21] When TGF-was applied with a biodegradable osteogenic material, bone growth around calvarial defects increased significantly. [22] IGF-I stimulates bone formation by proliferation and differentiation, [23] and it is synthesized and secreted by osteoblasts. [24] An increase in the proliferation of human osteoblasts has been demonstrated with a combination of PDGF, IGF-I, TGF, and epidermal growth factor. [25]

The intended role of the PRF membrane in our case report was to contain the HA and PRF in the bony defect in the early phase of wound healing. PRF can serve as a resorbable membrane, which can be used in pre-prosthetic surgery and implantology to cover bone augmentation site. [10] Since the surface of PRF membrane is smoother, it can cause superior proliferation of human periosteal cells thereby enhancing bone regeneration. [15] The progressive polymerization mode of coagulation in PRF helps in the increased incorporation of the circulating cytokines into the fibrin meshes (intrinsic cytokines) which helps in wound healing by moderating the inflammation. [15],[26] In our case report, two layers of PRF membranes were placed over the defect because, firstly this membrane is a thin fibrin scaffold that might undergo quick resorption, secondly PRF membranes are inhomogenous, since leukocytes and platelet aggregates are concentrated within one end of the membrane. Therefore, the use of two membrane layers with membranes in opposite sense, allows to have the same components (platelets, leukocytes, fibronectin, vitronectin) on the whole surgical surface. [11] The membrane was slightly hanged over the edge of the wound as it controls the migration of the different tissue families on the wounded site thereby directing the organization of the wound.

To conclude, PRF membrane has been used as a barrier membrane over a large bony defect to maintain a confined space for the purpose of guided tissue regeneration. On the basis of the results obtained in our case report, we hypothesize that the use of PRF in conjunction with HA crystals might have accelerated the resorption of the graft crystals and would have induced the rapid rate of bone formation. However, histological studies are required to examine the nature of newly formed tissue in the defect and long-term, controlled clinical trial will be required to know the effect of this combination over bone regeneration.

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