| Abstract|| |
Aims: Dental implants have revolutionized the treatment modality for replacing missing teeth. The ability of implants to osseointegrate with the bone leads to its success. The problem is sometimes there is inadequate bone available for implant. If hygiene is not maintained, biofilms of bacteria can be formed around the dental implant. One approach to this problem has been development of bioactive surgical additives. Platelet-rich fibrin (PRF) appears as an alternative. There are various techniques of using PRF. These techniques need skill and practice to use PRF. Objective: To evaluate implant stability and flow of injectable PRF (i-PRF) of regular implant and modified innovative design implant. Materials and Methods: Thirty goat jaw bones were selected. Implants were placed in mandibular posterior region. Fifteen implants were placed using regular dental implant system (Group A) on the left side of jaw bone. The other 15 implants were placed using modified dental implant (Group B) on the right side of jaw bone. The body of these implants at middle has drainage vents to drain/flow the i-PRF-like dye. The dye was injected through regular and modified implants (DV-PIMS technique). Then the stability was checked with the help of Periotest. Cross section was taken 3 cm away from dental implant at the angle of mandible, to check the flow of i-PRF/platelet-rich plasma (PRP)-like dye. Results: Periotest evaluation showed a mean of 2.3 for implant Group B and a mean of 1.5 for implant Group A. The flow of i-PRF-like dye was seen in Group B, and Group A does not show any flow. Conclusion: There are various techniques of using PRF. These techniques need skill and practice to use PRF. This (DV-PIMS) method aims to explain new implant design that disperses an i-PRF solution from inside out. The screw section of the new implant is made of a reservoir running vertically down inside. That reservoir is filled with (injectable) PRF, and then a cover screw is placed. The solution will begin to slowly diffuse out, through the vents in implant, keeping biofilms from forming or avoiding at the screw–bone interface and accelerate healing process.
Keywords: Bioactive surgical additives, dental implant, implant stability, osseointegrate, platelet-rich fibrin
|How to cite this article:|
Vikhe DM, Shah SV, Carrion JB, Palekar UG. Innovative method “DV-PIMS” technique and dental implant design for grafting injectable platelet-rich fibrin around the dental implant – Goat jaw cadaver study. Indian J Dent Res 2019;30:450-4
|How to cite this URL:|
Vikhe DM, Shah SV, Carrion JB, Palekar UG. Innovative method “DV-PIMS” technique and dental implant design for grafting injectable platelet-rich fibrin around the dental implant – Goat jaw cadaver study. Indian J Dent Res [serial online] 2019 [cited 2019 Aug 24];30:450-4. Available from: http://www.ijdr.in/text.asp?2019/30/3/450/264110
| Introduction|| |
Dental implantology has revolutionized the treatment modality for replacing missing single or multiple teeth with implant supported crown/prostheses. The criteria for success of an implant include its ability to osseointegrate with the bone bed in the host, to support a prosthesis, and to sustain occlusal stresses during function. Bone loss around the implant reduces its longevity. Bone loss begins from the crest/collar region of an osseointegrated implant and progresses apically. The possible causes of crestal bone loss could be a local inflammation/infection and mechanical stresses acting on the crestal bone around the implant crest module/collar. In the successful results of dental implants' placement, implant stability is considered as prerequisite and important factor toward long-term results in dental implantology treatment modality. The well-planned treatment mainly involves bone augmentation and use of bioactive surgical additives, so as to achieve optimal alveolar ridge dimensions., Patients with alveolar ridge defects or less dense bone are managed with bone grafts, bioactive surgical additives, or sinus lift procedures to achieve a successful and stable dental implant placement. However, current implants and their methods of implantation have a number of limitations and disadvantages. Most dental implants fail due to the nonoccurrence of osseointegration, leading to a loose and unattached implant. Other dental implants fail due to a perioperative infection. Infection at or near the site of insertion of a dental implant (either perioperative or postoperative) is resolved by a time-intensive and costly process.
Selection of dental implant with proper design also plays an important role to avoid crestal bone loss. Introduction of bioactive surgical additives in dentistry to control the inflammation and accelerate the speed of healing is one of the great challenges in clinical research. Platelet-rich fibrin (PRF) appears as a natural and satisfactory option with better prognosis and with less complications. Many implant designs and methods have been developed by various companies to achieve greater degree of osseointegration and initial healing. Two factors should be considered (1) implant collar design and (2) method of using platelet concentrates. Tissue regeneration is a thought-provoking area in the field of dentistry. Platelets had been proven to be a good source of growth factors. Using platelet concentrates is a way to accelerate and enhance the body's natural wound healing mechanisms. There are various techniques of using PRF. The previous techniques need skill and practice to use PRF.
Keeping all the above points under consideration, a study was planned on goat jaw cadaver, for innovative implant design to avoid initial crestal bone loss and to store and flow injectable PRF (i-PRF) and the innovative method/”DV-PIMS” technique called Deepak Vikhe Pravara Institute of Medical Sciences Technique – for using i-PRF with less skills and a way to accelerate and enhance the body's natural wound healing mechanisms.
Purpose of the study
This study was undertaken on goat cadaver/jaw bone to evaluate implant flow of i-PRF with new method and dental implant design for grafting PRF (i-PRF) around the dental implant. Second, to evaluate implant stability of implants with regular design and implants with modified innovative design.
| Aims and Objectives|| |
The aim of this study was to determine and evaluate the implant stability of regular implant and modified innovative design and to evaluate flow of i-PRF through modified dental implant.
Goat mandibular jaw bone with adequate bone support was used for implant placement. Implants were placed in goat jaw bone in the posterior region.
| Materials and Methods|| |
Required armamentarium: 30 goat jaw bones, LifeCare dental implant system (System A), EZ Hi-Tec Implant (LifeCare, [Herzelia Industrial Area, Israel]), modified dental implant, Periotest instrument (Periotest S 3218; Medizintechnik Gulden, [Eschenweg, Austria]), and dye in i-PRF consistency. This dye was compared with the actual i-PRF consistency and then used. Heavy-duty micromotor with disc bur was used. Thirty goat mandibular jaw bones were selected with adequate bone height and width for implant placement. Implants were placed in goat jaw bone in the posterior region.
After receiving institutional ethical clearance (CPCSEA) committee approval, 30 goat jaw bones with proper bone height and width were selected for DV-PIMS technique called Deepak Vikhe Pravara Institute of Medical Sciences Technique – for using i-PRF. Implants were placed in mandibular posterior region. Fifteen implants were placed using LifeCare dental implant system (EZ LifeCare) (Group A) in the left side of jaw bone with 35 N torque. The other 15 implants were placed with modified dental implant (Group B) on the right side of jaw bone with 35 N torque. The size of implants selected in both the groups was 4.2 × 10 mm. Group B dental implants were modified implants of EZ LifeCare implant with three zones of implant collar, as given below. This modified dental implant has been provisionally registered for Patent; application number is 201721035360 (Government of India) [Figure 1]. Ethical approval from Institutional CPCSEA Committee has been taken. Dated = 23/06/2018.
Zone 1 = polished collar
Zone 2 = dotted collar
Zone 3 = micro-threads
The polished collar region, a dotted collar region, and a micro-threaded collar region can be sequentially arranged one below the other. In an aspect, the polished collar region and the dotted collar region can be at least partially in contact with gingival tissue, whereas micro-threaded collar region can be at least substantially in contact with crestal bone. The different portion of the crest module/neck collar design includes a polished collar (hereinafter interchangeably referred as “zone 1”) to avoid plaque accumulation, a dotted collar (hereinafter interchangeably referred as “zone 2”) for gingival tissue attachment, and a micro-threaded collar (hereinafter interchangeably referred as “zone 3”) to avoid crestal bone loss. The body of modified implants at middle has reservoir running vertically down the inside with drainage vents to drain/flow the dye [Figure 2] and [Figure 3]. The vents are 45° facing downward. The implants have modified pitch of 0.2 mm. The bottom portion can include a rounded profile.
|Figure 2: Line diagram showing flow of i-PRF-like dye through modified implant|
Click here to view
The dye was injected through regular and modified implants with the help of syringe with proper viscosity [Figure 4]. A 5-mL syringe with 21-gauze needle used, with adjustable stopper placed at 1 cm. Then the stability was checked with the help of Periotest between regular implant design and modified implant design implant [Figure 5]. Cross section was taken 3 cm away from the dental implant at the angle of mandible as it was difficult to section and measure less than 3 cm, to check the flow of i-PRF/platelet-rich plasma (PRP)-like dye through goat mandible [Figure 6]. The flow of the dye was checked in millimeters from dental implant to the extent. The goat cadaver was to be discarded in co-ordination with biomedical department with proper bioethical guidelines. Periotest is the device to check the stability of dental implant. Periotest values were tabulated and analyzed. Statistical analysis was done by descriptive statistics mean, standard deviation, percentage, and so on. Statistical test of significance namely Student's unpaired t-test was applied at 5% level of significance. Statistical analysis software SYSTAT Version 12 was used.
| Results|| |
Within limitation of this study, Periotest evaluation showed a mean of 2.3 for implant Group B and a mean of 1.5 for implant Group A [Table 1]. The flow/grafting of i-PRF was seen in Group B (modified implant), whereas Group A does not show any flow. More stress should be given on developing implant collar, implant design, and technique of grafting i-PRF around dental implant to reduce the initial crestal bone loss and for better initial healing. By applying Student's unpaired t–test, there is a significant difference between mean values of implant stability in Group A and Group B (i.e. P < 0.05).
| Discussion|| |
In implant dentistry, the implant placement in compromise alveolar ridges with bony defects needs bone augmentation procedures such as use of growth factors, sticky bone, and grafts. These procedures need extra skills and proper handling. One of the recent innovations is the use of platelet concentrates for in vivo tissue applications: (1) PRP and (2) PRF. Platelet concentrates are a concentrated suspension of growth factors found in platelets, which act as bioactive surgical additives that are used locally to induce wound healing. PRP was first used in oral surgical procedures by Whitmann et al. in 1997.
Furthermore, Choukroun et al. in their study results showed a less healing time prior to implant placement when PRF was used with freeze-dried bone graft. Simonpieri et al. noted good clinical results in cases of immediate implants, placing implants in bone defect areas and covering it with several layers of PRF mix with bone graft. There are different forms of platelet concentrates. In this study, injectable form PRF was used, that is, i-PRF. This i-PRF is mixed with bone graft to form sticky bone which can be added in layer form over the defect locally. There are various techniques of using PRF. These techniques need skill and practice to use PRF. Therefore, it would be advantageous to provide a way in which the conventional method, system, and device is being replaced or supplemented by an improved, quicker, and more convenient dental implant surgery or technique or method using PRF which does not demand higher level of effort and expertise while dental implantation. Employment of new simple technique “DV-PIMS” method aims to explain new implant design that disperses an i-PRF solution from the inside out. The LifeCare EZ implants were modified to achieve new design. The screw section of new implant is made of a reservoir running vertically down the inside. That reservoir is filled with (injectable) PRF, and then cover screw is placed. The solution will begin to slowly diffuse out, through the vents in implant, keeping biofilms from forming or avoiding at the screw–bone interface and accelerate healing process. Over this solution, we can place bone graft layer and flap can be closed.
The implant stability was recorded with the help of Periotest device. Periotest is the device to check the stability of dental implant. Periotest was described by Schulte. The Periotest's scale ranges from − 8 to + 50. The lower the Periotest value, the higher is the stability/damping effect of the test object (tooth or implant). A negative value indicates that the implant is stable and well osseointegrated. Studies conducted by Truhlar et al. and Misch  found that the Periotest instrument is capable of assessing implant stability.
In this study, the average value of Periotest evaluation showed a mean of 2.3 for implant Group B and a mean of 1.5 for implant Group A. That means Group B (modified implant) showed better results.
| Conclusion|| |
The results and outcome of this study/technique (“DV-PIMS” method) will help clinicians use bioactive surgical additives (i-PRF) with more ease and effectively. This article explains an improved implant design for better attachment of gum tissues, grafting i-PRF around implant. This implant can also be filled with an antimicrobial mouthwash. As it can be dispersed and stop Streptococcus mutans biofilms from forming and kill ones that had grown on the implant beforehand at initial healing stage.
The authors are thankful to the Rural Dental College, Pravara Institute of Medical Sciences.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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Dr. Deepak M Vikhe
Associate Professor, PhD Scholar, Department of Prosthodontics, Rural Dental College and Hospital, PIMS, Pravara Medical Trust, Loni - 413 736, Maharashtra
Source of Support: None, Conflict of Interest: None
[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6]