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ORIGINAL ARTICLE
Year : 2011  |  Volume : 1  |  Issue : 2  |  Page : 107-111

Role of povidone iodine in periapical surgeries: Hemostyptic and anti-inflammatory?


1 Department of Conservative Dentistry, Chettinad Dental College and Research Institute, Kelambakkam, Chennai, India
2 Department of Oral and Maxillofacial Surgery, Chettinad Dental College and Research Institute, Kelambakkam, Chennai, India
3 Department of Conservative Dentistry, Indira Gandhi Dental College, Puduchery, India

Date of Web Publication11-Feb-2012

Correspondence Address:
K Senthil Kumar
Department of Conservative Dentistry, Chettinad Dental College and Research Institute, Kelambakkam, Chennai
India
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DOI: 10.4103/2231-0746.92768

PMID: 23483078

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  Abstract 

Introduction: Periapical surgery needs asepsis, a bloodless field for ensuring success of the treatment. Efficacy of Povidone Iodine (PVI) in the elimination of pathogen causing periapical lesions is well established. PVI is also widely used as a disinfectant, sclerosing agent, styptic as well as an anti-odematous agent. Materials and Methods: This prospective pilot study done on 20 males between 20-40 years age group with periapical lesions in single rooted maxillary anterior tooth of 1-2 cm in diameter. The bleeding time, clotting time, bleeding time at the apex, drugs used and visual analogue scale of oedema on postoperative days were obtained. Descriptive statistics, paired t test and independent t-test were used. Results and Conclusion: Results show a statistically significant reduction in the time required to achieve a bloodless field and a marked decrease in oedema in the first and second postoperative days resulting in lesser consumption of NSAIDs. In conclusion, the effect of PVI in periapical surgery seems to reduce the bleeding time at apex, total dose of NSAIDs used, oedema on first two postoperative days with high statistical significance. Hence the routine use of saline in periapical surgeries may be effectively substituted with PVI. The finding of this pilot study has to be evaluated using wider samples for effective clinical translations.

Keywords: Apicoectomy, periapical surgery, periradicular surgery, povidone iodine


How to cite this article:
Kumar K S, Reddy G V, Naidu G, Pandiarajan R. Role of povidone iodine in periapical surgeries: Hemostyptic and anti-inflammatory?. Ann Maxillofac Surg 2011;1:107-11

How to cite this URL:
Kumar K S, Reddy G V, Naidu G, Pandiarajan R. Role of povidone iodine in periapical surgeries: Hemostyptic and anti-inflammatory?. Ann Maxillofac Surg [serial online] 2011 [cited 2019 Sep 20];1:107-11. Available from: http://www.amsjournal.com/text.asp?2011/1/2/107/92768


  Introduction Top


Hemostasis and asepsis are vital in periapical surgery. Intraoperative bleeding not only masks the visual field but also hampers the setting of materials used for retrograde filling. Although local anesthetic infiltration with 1:80,000 adrenaline provides vasoconstriction, it is often not adequate for the surgical manipulation of bone in the periapical region. Many methods are routinely used to control bleeding. Thermal coagulation using cautery, cryosurgery, lasers, etc. need additional armamentarium and skill. Bone wax is known to cause foreign body granulomas. [1] Astringents and styptics such as ferric sulfate, calcium sulfate, and tannic acid can modify the local tissue environment and thereby alter healing. Although hemostasis can be achieved, they shall also act as potential irritants and increase inflammation. Usage of biologically active autogenous or allogenous materials with regenerative capacity like thrombin, gelfoam, oxycel, surgicel, fibrin glue, or platelet-rich protein may be advocated for large critical sized bone defects where spontaneous regeneration of bone is not possible. Even in those cases, hemostasis needs to be achieved to provide better visualization of the size of the defect without hampering the vascularity. However, a few of these materials are also known allergens. [2]

Periapical surgical site is an infected wound site. Because periapical surgery is often performed as an out-patient procedure under not so optimal operation theater grade aseptic environment, an additional antiseptic for the complete sterilization of the area before closure of the wound would reduce the infection and inflammation by bringing down the bacterial load. Periapical infection also signals a recalcitrant infection of bacteria that have survived rigorous debridement, sterilizing procedures, and antibiotics; to ensure the success of the treatment, meticulous disinfection of the infected site is mandatory, hence the efficacy of the safe disinfectant should be unquestionable.

Among all disinfectants, iodine and sodium hypochlorite were found to be more effective against Prevotella intermedia, Peptostreptococcus micros, Streptococcus intermedius, Fusobacterium nucleatum, and Enterococcus faecalis. [3] Sodium hypochlorite being a protein solvent can cause severe complications when used in periapical region and therefore iodine is one of the best antimicrobial agents for elimination of periapical infection. [4]

Iodine combines irreversibly with tyrosine residues of proteins of microorganisms, interferes with the formation of hydrogen bonding by some amino acids and nucleic acids, oxidizes sulfydryl groups, and reacts with sites of unsaturation in lipids and is thereby a potent disinfectant. [5] Povidone iodine (PVI), a synthetic polymer of 1-vinylpyrrollidone, is free iodine bound to polyvinyl-pyrrollidone (PVP), a solubilizing agent, which releases iodine. [6] PVI iodine is a widely used perioperative disinfectant. However, its off-label use in intraoperative procedures such as pleurodesis as sclerosing agent, checking of  Fallopian tube More Details patency as irrigant, as scolicidal agent in hydatid cyst removal from peritoneal cavities, and the like are reported. [7] A meta-analysis of intraoperative PVI application to prevent surgical-site infection concludes that it significantly decreased the surgical site infection. [7] Efficacy and safety of PVI in minor oral surgical procedures have been well documented. PVI's effective use as a sclerosant in various parts of the body has also been well documented. [9],[10],[11],[12]

The effectiveness of PVI as a hemostyptic in open extraction wounds and antiedematous agent in minor oral surgical procedure has been demonstrated. The aim of this prospective study is to analyze the hemostyptic and the antiedematous effect of PVI in close oral surgical sites of periapical surgery.


  Materials and Methods Top


This study was conducted in the period between June 2009 and December 2010. This pilot study included 20 males in the age group of 20-40 years with a periapical lesion of size of about 1-2 cm in diameter in a maxillary single-rooted tooth to minimize bias. Patients were screened for thyroid disorders. Informed consent was taken as a part of the procedure. As the study did not deviate from the standard care procedure of periapical surgery, it was earlier exempted from Institutional Ethical Board clearance, provided the patients were not identified through photographs and radiographs.

The routine blood examination was performed to assess the fitness of the patient and to detect abnormalities of the bleeding time (BT) and clotting time (CT). A total of 2 ml of 2% lignocaine with adrenaline (1:80,000) was given during the surgery. During surgery, randomly, in 10 cases, 0.5% diluted povidone iodine (BETADINE, G.S. Pharmabutor Pvt Ltd., Uttarakand and distributed by Win-Medicare, New Delhi, India) was used as an irrigant along with cotton, if necessary, to clear the pooled blood along with suction. After adequate periapical curettage was performed, a gauze pellet soaked in PVI was placed in the periapical cavity for a minute. The pellet was removed and wound irrigated again with saline to clear the site. The time taken for achieving optimal hemostasis to start the retrograde filling was recorded [Figure 1]a to e.
Figure 1: (a) Intraoral view of the lesion, (b) Exposure of the cystic lesion, (c) Enucleation of the lesion and curettage, (d) Betadine-soaked gauze placed in the bony crypt to sterilize the cavity and achieve hemostasis, (e) achieving of adequate hemostasis for retrograde filling

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In the rest of the cases, saline was used to irrigate the periapical surgical field along with cotton, if necessary, to remove the pooled blood along with suction. After adequate periapical curettage and retrograde cavity preparation, a saline-soaked pellet was placed for a minute on the bony cavity, removed, and the site irrigated well. The time taken for adequate hemostasis for placing the retrograde filling was measured [Figure 2]a to d. Same type suture material was used for all the cases. Same surgeon performed all the surgeries as a day care surgery in the morning between 9.00 am to 10.00 am.
Figure 2: (a) Exposure of the cyst, (b) Enucleation and curettage, (c) Soaking of the saline pack placed in the cystic cavity within seconds, (d) Achieving optimal hemostasis for retrograde filling

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The periapical bleeding time (PBT) was measured as the time that elapsed between the removal of the curette/rotary tool to the achievement of complete hemostasis (in seconds). Patient was prescribed with 500 mg of amoxycillin IP thrice daily for 3 days initially and extended as required. Similarly, ibuprofen IP 600 mg thrice daily was prescribed for 2 days and extended as required. The patient was advised to take ibuprofen as and when required only and to record the total dose taken per day. The patient was discharged on the same day by 4.00 pm after checking the surgical field. No pack (heat/cold) application was advised. Twenty-four hours after surgery, the patient's perception of edema on a visual analog scale (VAS) of 10 was asked and noted. This was repeated for all subsequent 5 days.

Statistical Package for Social Services (SPSS Version 16, IBM, IL, USA) was used to make data entry and analysis. P-P plot was initially performed to study the distribution of the data. Descriptive statistics for the outcome variable were presented. Paired t-test was used to find the difference between the VAS of the edema in the whole population. Independent t-test was used to find the difference between the two study groups. The mean of outcome measures and mean difference between the two study groups along with the 95% confidence interval are presented. Paired t-test was used to find the difference between the VAS of the edema in the whole population. P value of less than 0.05 was taken as significant.


  Results Top


This pilot study had involved all males in the age group of 20-40 years with a periapical lesion of about 1 cm in diameter in a maxillary single-rooted tooth to minimize bias. The mean age in saline group was 27.8 ± 4.61, while in the PVI group it was 28.7 ± 5.5. The difference in mean age between the groups was not significant (P = 0.696).

The descriptive statistics of the study group are presented in [Table 1]. It was observed that the difference between the mean edema VAS score increased in day 2 and from third postoperative day it decreased. The difference between the days was significantly different (P = 0.001) [Figure 1].
Table 1: Descriptive statistics of the study population

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[Table 2] depicts the comparison of the study group and the mean values of the outcomes. It was observed that there was significant difference between the CT and BT between the study groups. However, the time taken to achieve a clear periapical field after curettage as described in Materials and Methods section was significantly lower in the PVI group (P = 0.004) than the saline group. Similarly, the PVI group required much lower ibuprofen to control the postoperative pain.
Table 2: Difference between the type of irrigant used for the surgery and outcomes studied

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There was a significant difference in perception of edema by the patient between the two study groups. The perception varied significantly on the first (P = 0.002) and second day (P = 0.032). Although on the third to fifth day the PVI group had a lower score; the difference was not statistically significant.


  Discussion Top


Wound healing is a complex biological reparative process involving a series of sequentially orchestrated physiological events. In this process, the immunological resources of the host are recruited to fight infection and debride damaged tissue. [13] In the process of healing of surgeries removing periapical lesions, like any other surgeries, blood supply is reestablished after which regeneration of bone and soft tissue occurs after replacing damaged or destroyed tissue. The area to be healed is decreased via wound contraction and bone deposition. Closure of the wound in the surface area is achieved through epithelial cell migration. [14]

The decision regarding the choice of any wound treatment involves issue of the safety and efficacy of the treatment or the material modalities. Furthermore, the effect of these on the progress of the wound through the stages of healing determines the choice of treatment. The efficacy of a wound care treatment such as PVI can be primarily judged in vitro by its ability to kill microorganisms. In vivo studies have been used to demonstrate the effectiveness in influencing the rate or severity of wound. [15]

Apicoectomy is the treatment of choice when there is a periapical infection that cannot be cleared by conventional root canal treatment and orthograde retreatment may not be possible due to obliteration of the canal, fractured instrument, or the presence of a large post and core. Success of this surgical procedure lies in the prevention of spread of bacteria from the root canal to the surrounding tissues. To achieve the same, the root-end filling should prevent microleakage and the curetted periapical region needs to be sterilized meticulously. The conventional materials used for such fillings, such as amalgam, glass ionomer cement, and the resins, are moisture sensitive and require decontamination of the resected root end from blood, moisture, and bacteria. Whatever the material of choice, success of the procedure lies in achieving a bloodless, sterile field of working. [16]

It has been reported that the Federal Drug Administration of United States has approved PVI as a nonprescription first-aid antiseptic product. It has been described as short-term treatment for about a week on superficial and acute wounds. Its efficiency in controlling infection has been already been demonstrated. [7],[8] PVI is regularly available in dental clinics and much cost-effective. Use of PVI helps to maintain the asepsis of the periapical region after the surgery.

Literature is full of contradiction on the safe limits of the PVI concentration to be used in surgeries. It has been found that PVI at concentrations greater than 0.05% can be toxic to granulocytes [17] while at concentration greater than 0.004% to be entirely toxic to keratinocytes. [18] Several studies have identified PVI of concentration 0.05% to be safe for fibroblasts. [18] Lineaweaver and associates found PVI to be an effective bactericidal agent at a concentration of 0.001%. [19] Findings, based on qualitative evaluation using vital micrography, electron micrography, and vital angiography, showed "a very slight reaction" in wound microcirculation when exposed to a 1% solution of PVI. [20]

Similarly, the optimal method of application of PVI has not been clearly established. It has been reported that the brief contact such as wound irrigation, especially if followed by a saline rinse, or use of extremely diluted solution might minimize the risk of cytotoxicity. [21] On the contrary, prolonged contact such as packing the wound with gauze saturated with PVI, however, might enhance the bactericidal effects. No toxicity has been reported clinically with PVI used as a brief rinse or soak. [22]

The effect of spraying of dry powder PVI into intra-abdominal surgical wounds on wound healing was assessed experimentally (in Wistar rats) and clinically. It was inferred from this study that PVI did not interfere with wound healing macroscopically, histologically, or mechanically in Wistar rats and that it did not affect wound healing in any way. [23]

Study on the short- and long-term effects of PVI on osteoblast number, viability, and function after short exposure to PVI with and without additional bone-morphogenetic protein-2 (BMP-2) concludes that short-time application of PVI in concentrations of 1:10 and higher lead to decreased viability and impaired differentiation. However, surviving cells showed good recovery and mineralization potential. [24]

In this study, the study group did not demonstrate significant difference between BT and CT. However, the PBT varied significantly among the study group. This indicates the efficacy of the PVI as a hemostyptic that has been demonstrated earlier in exodontia cases. In this study, we had significant reduction in BT in the PVI group resulting in a faster procedure, better setting, and cleaner field of working. It concurs with earlier finding of PVI when used for irrigation of extraction sockets reduced postextraction bleeding significantly. [25] The explanation provided was that iodine, being corrosive (owing to its oxidizing potential) and povidone, is a thickening and granulating agent. Combined they produced a chemocauterizing effect that could be the reason for the cessation of bleeding. [25]

PVI, reported as an antiedematous agent earlier, [26],[27] in this study have been proved once again. As demonstrated in [Figure 3], there was a significant difference between each postoperative day with high statistical significance. However, the difference between the two study groups varied significantly only on the first and second postoperative day. The difference in the perception of edema varied significantly between the PVI group and the saline group. There had been a less amount of swelling perceived by the PVI group than the saline. Similar observation is seen in the literature. [26],[27] This effect of PVI was suspected due to its inhibitory effect on leukotriene B4 and leukocyte extravasation (chemotaxis). [27] It could have also reduced inflammation by eliminating the pathogen from the infected area, thereby halting the disease process. In vitro and in vivo studies have shown that PVI also decreases leucocyte chemotaxis and its extravasation, thereby bringing down edema. [28] PVI also could possibly cause a denudation of mesothelial cells and resulting in a complex sequence of events leading to an acute inflammatory response to the local injury, followed by the regeneration of the damaged cells, and the wound strength established by the migration of connective tissue cells, the synthesis of extracellular matrix proteins, and finally collagenization. [26] Moreover, PVI also decreases the availability of cytochrome oxidase thereby altering the prostaglandin synthesis, thereby influencing initial phases of healing, as observed in this study. [29],[30] From these studies and our results, it could be safely concluded that PVI produces lesser edema during the initial phases of healing. This would effectively translate as a significantly reduced morbidity to the patient when used in clinical situation.
Figure 3: Comparison of edema based on Visual Analog Scale in the study population

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  Conclusion Top


This study establishes the efficacy of PVI as an effective hemostyptic and antiedematous agent in periapical surgery when compared with saline. Further clinical trials could establish the usage of PVI as an ideal hemostypic antiseptic for periapical surgery and a 1-minute saturation of the periapical cavity with the solution may be incorporated in the regular procedure for the treatment. The difference in the effect of various stages of the sequale of periapical diseases needed to be studied in depth. Future direction in this regard would warrant large-scale studies.

 
  References Top

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2.Witherspoon DE, Gutmann JL. Haemostasis in peri-radicular surgery. Int Endod J 1996;29:135-49.  Back to cited text no. 2
    
3.Spratt DA, Pratten J, Wilson M, Gulabivala K. An in vitro evaluation of the antimicrobial efficacy of irrigants on biofilms of root canal isolates. Int Endod J 2001;34:300-7.  Back to cited text no. 3
    
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5.Gottardi W. Iodine and iodine compounds. In: Block SS, editor. Disinfection, Sterilization and Preservation. 1 st ed. Philadelphia: Lea and Febiger; 1983. p. 183-6.   Back to cited text no. 5
    
6.Dedo DD, Alonso WA, Ogura JH. Povidone-iodine an adjunct in the treatment of wound infections, dehiscence's and fistulas in head and neck surgery. Trans Am Acad Opthalmol Otolaryngol 1977;84:68-74.  Back to cited text no. 6
    
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9.Lim HK, Cho JY, Kim SH. Sclerotherapy of peritoneal inclusion cysts: A long-term evaluation study. Abdom Imaging 2010;35:431-6.  Back to cited text no. 9
    
10.Karcaaltincaba M, Akhan O. Radiologic imaging and percutaneous treatment of pelvic lymphocele. Eur J Radiol 2005;55:340-54.  Back to cited text no. 10
    
11.Seelig MH, Klingler PJ, Oldenburg WA. Treatment of a postoperative cervical chylouslymphocele by percutaneous sclerosing with povidone-iodine. J Vasc Surg 1998;27:1148-51.  Back to cited text no. 11
    
12.Keating JP, Neill M, Hill GL. Sclerosing encapsulating peritonitis after intraperitoneal use of povidone iodine. Aust N Z J Surg 1997;67:742-4.  Back to cited text no. 12
    
13.Kloth LC, McCulloch JM. The inflammatory response to wounding. In: McCulloch JM, Kloth LC, Feedar JA, editors. Wound Healing: Alterative in Management. Philadelphia, PA: FA Davis Co.; 1995. p. 1-15.  Back to cited text no. 13
    
14.Daly TJ. Contraction and re-epithelialization. In: McCulloch JM, Kloth LC, Feedar JA, editors. Wound Healing: Alternatives in Management. Philadelphia, PA: FA Davis Co.; 1995. p. 32-46.  Back to cited text no. 14
    
15.Burks RI. Povidone-iodine solution in wound treatment. Phys Ther 1998;78:212-8.  Back to cited text no. 15
    
16.Otani K, Sugaya T, Tomita M, Hasegawa Y, Miyaji H, Tenkumo T, et al. Healing of experimental apical periodontitis after apicoectomy using different sealing materials on the resected root end. Dent Mater J 2011;30:485-92.  Back to cited text no. 16
    
17.Vanden Broek PJ, Buys LM, Vanfurth R. Interaction of povidoneiodine compounds, phagocytic cells, and microorganisms. Antimicrob Agents Chemother 1982;22:593-7.  Back to cited text no. 17
    
18.Tatnall EM, Leigh IM, Gibson JR. Comparative toxicity of antimicrobial agents on transformed keratinocytes. J Invest Dematol 1987;89:316-7.  Back to cited text no. 18
    
19.Lineaweaver W, Howard R, Soucy D, McMorris S, Freeman J, Crain C, et al. Topical antimicrobial toxicity. Arch Surg 1985;120:267-70.  Back to cited text no. 19
    
20.Brånemark PI, Ekholm R. Tissue injury caused by wound disinfectants. J Bone Joint Surg Am 1967;49:48-62.  Back to cited text no. 20
    
21.Dela Cruz F, Brown DH, Leikin JB, Franklin C, Hryhorczuk DO. Iodine absorption after topical administration. West J Med 1987;146:43-5.  Back to cited text no. 21
    
22.Aronoff GR, Friedman SJ, Doedens DJ, Lavelle KJ. Increased serum iodide concentration from iodine absorption through wounds treated topically with povidone-iodine. Am J Med Sci 1980;279:173-6.  Back to cited text no. 22
    
23.Gilmore OJ, Reid C, Strokon A. A study of the effect of povidone-iodine on wound healing. Postgrad Med J 1977;53:122-5.  Back to cited text no. 23
    
24.Schmidlin PR, Imfeld T, Sahrmann P, Tchouboukov A, Weber FE. Effect of short-time povidone-iodine application on osteoblast proliferation and differentiation. Open Dent J 2009;3:208-12.  Back to cited text no. 24
    
25.Kumar BP, Maddi A, Ramesh KV, Baliga MJ, Rao SN, Meenakshi. Is povidone-iodine a hemostyptic? A clinical study. Int J Oral Maxillofac Surg 2006;35:765-6.  Back to cited text no. 25
    
26.Dey A, Bhuniya S, Datta Chaudhuri A, Pandit S, Saha-Dutta Chowdhury M, Sengupta A, et al. Iodopovidonepleurodesis: Experience of a tertiary hospital in Kolkata. Singapore Med J 2010;51:163-5.  Back to cited text no. 26
    
27.Arakeri G, Brennan PA. Povidone-iodine: An anti-oedematous agent? Int J Oral Maxillofac Surg 2011;40:173-6.  Back to cited text no. 27
    
28.Rahn R, Adamietz IA, Boettcher HD, Schaefer V, Reimer K, Fleischer W. Povidone-iodine to prevent mucositis in patients during antineoplastic radio-chemotherapy. Dermatology 1997;195 Suppl 2:57-61.  Back to cited text no. 28
    
29.Rothwell KG. Povidone iodine and leucocytes. Lancet 1986;1:104.  Back to cited text no. 29
    
30.Zamora JL. Chemical and microbiologic characteristics and toxicity of povidone iodine solutions. Am J Surg 1996;151:401-6.  Back to cited text no. 30
    


    Figures

  [Figure 1], [Figure 2], [Figure 3]
 
 
    Tables

  [Table 1], [Table 2]


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