implants

The Courage to implement Samplings to evaluation efficiency Medical Clinics OECD

Published on: 17th July, 2018

OCLC Number/Unique Identifier: 7795943428

We are able to test with statistic method Based Evidence Medicine the new Medicaments on common World Market or the new Medical Devices - Orthopaedic implants. Of course, with usage the same principles we could Tests similar ways the explicit efficiency, legalities and Technical Requirements Laws by Medical processing for implanting by standard Health care in Orthopaedic Clinics in network OECD.
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Final solution in femoroacetabular impingement - Threaded cups in hip revision surgery 2002-2012

Published on: 23rd October, 2018

OCLC Number/Unique Identifier: 7900083791

Purpose: Here, we report the complications of endoprosthesis with threaded cups according to our application in cases of complicated acetabulum (hip revisions and femoroacetabular impingement (FAI)). Methods: A total of 504 patients was analyzed, including 189 men and 315 women. For re-implanted patients (n = 49), the mean time to re-implantation was 6.3 years and the average age at re-implantation was 54.7 years. For censored patients (n = 455), the mean time to censoring was 5.5 years and the average age of the implant was 55.7 years. Among the patients that were censored, 77 died and 378 patients did not experience an event necessitating re-implantation. Results: For the total study population, the Kaplan-Meier estimate of 5 year survival is 0.94 and of 10 year survival is 0.85. 90% of the implants survived 7 years, 80% of the implants survived almost 12 years and 70% of implants survived almost 15 years. Kaplan-Meier survival analysis suggests that men have higher survival than women. Age of the patient at the time of implant was not a statistically significant factor for re-implantation (p value = 0.21) but sex was (p value = 0.02). Women had 2.25 times more risk of being re-implanted than men. Conclusions: In our case series, the failure rate, as a result of aseptic loosening, was 7.4% (n = 51). More than half the failure cases (56%) required re-implantation. Over one-third (37%) of the primary arthrosis cases, were found to be FAI, lessening the frequency of diagnosis of the former. In our clinic, the threaded cup seems to be indispensable in hip revision surgery and in treating FAI.
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Pulsed Shortwave Diathermy and Joint Mobilizations Restore a Twice Fractured Elbow with Metal Implants to Full Range of Motion

Published on: 27th January, 2017

OCLC Number/Unique Identifier: 7286359001

A 21-y-old recreationally active male lacking the last 30° of elbow extension from a fractured and dislocated elbow sustained while wakeboarding came to our clinic November of 2015. A regimen was applied of 20-minutes of pulsed shortwave diathermy (PSWD) treatments delivered at 100 watts to heat the affected tissue prior to approximately 40°C followed by 10 minutes of joint mobilizations. This was followed by application of an ice pack to the area for 30 minutes. Measurements and treatments were given on Nov 3,5 and 10. The changes in AROM extension were as follows: Nov 3, from 30° to 20°; Nov 5, from 24° to 10°; Nov 10, from 10° to 0°. Over the course of the treatment the PSWD/ joint mobilizations improved extension AROM of the elbow 30° (full AROM) in just 3 treatments. There was also no post-treatment pain.
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Comparative Study of Enophthalmos Treatment with Titanium Mesh Combined with Absorbable Implant vs. Costochondral Graft for Large Orbital Defects in Floor Fractures

Published on: 23rd March, 2017

OCLC Number/Unique Identifier: 7286350491

Introduction: Several treatment options are available for the optimal treatment for orbital fractures, depending on aesthetic and functional results after orbital wall reconstruction. The objective of this study is to compare the effect and safety of large orbital floor fractures with titanium mesh combined with poly-L-lactic acid/polyglycolic acid copolymer implants (Lactosorb®) vs. autologous costochondral graft. A wide range of permanent and biodegradable materials have been used successfully for orbital floor reconstruction, however they present with disadvantages for reconstruction of large defects, even if combined. Patients and Methods: A retrospective cohort study of patients from Estado de México, México, with access to ISSEMYM health care service, presenting with orbital floor fracture treated at Department of Plastic & Reconstructive Surgery/Maxillofacial Surgery at ISSEMYM Medical Center Toluca between January 2007 and July 2010. Age, sex, etiology, clinical findings, fracture pattern, and treatment modality (Titanium mesh with absorbable implant vs. costochondral graft) were considered. Predictor and outcome variables as complications, inpatient, trauma- surgery interval, surgical time and donor site pain are considered. Results: Follow up of 21 patients (12 weeks) 17 male, 4 female, ages 22-63 was made. Enophthalmos, main objective of this study, was identified with statistical significance presenting 0% (n=0) post-op Group B patients and 30% (n=3) for Group A (p=0.049). Statistical significance was found referring to inpatient days between two groups being less for costochondral reconstruction patients (p=0.02). No pain in patients undergoing alloplastic surgery. An interesting result was that donor area analogue pain scale for costochondral graft was 2.9/10. Conclusion: Surgical outcome and complications where evaluated comparing different materials for orbital floor reconstruction. Costochondral graft is a suitable choice when orbital reconstruction is indicated.
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Bruxism: Its multiple causes and its effects on Dental Implants: A Review

Published on: 12th May, 2017

OCLC Number/Unique Identifier: 7286350944

The rehabilitation of partially or completely edentulous patients with implant supported prostheses has been widely used, achieving high success rates. However, many studies consider the presence of bruxism as a contraindication for this treatment modality. The purpose of this study was to review the literature and identify risk factors in implant supported rehabilitation planning in subjects with bruxism. The rehabilitation of bruxers using implant supported prostheses, using implants with adequate length and diameter, as well as proper positioning, seems to be a reliable treatment with reduced risks of failure. Bruxism control through the use of a night guard by rigid occlusal stabilization appliance, relieved in the region of implants, is highly indicated. Although it is clear that implant supported rehabilitation of patients with bruxism requires adequate planning and follow-up, well-designed randomized controlled trials are needed to provide reliable evidence on the long-term success of this treatment modality.
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Preventing Peri-implantitis with a proper Cementation Protocol and with the consideration of alternatives to Cement-Retained Implant Restorations

Published on: 26th October, 2018

OCLC Number/Unique Identifier: 7929300020

Successful implant restoration is depending on an adequate surgical and prosthetic protocol. In the last few years an increase in Peri-Implantitis has been attributed, in part, to the excess cement left around the implant collar and threads, leading in many cases to bone loss and even the complete failure of the implant treatment [1-5]. This article will attempt: 1. To describe a proper cementation protocol for cement-retained implant restorations to reduce cement induced implant failures, and 2. To review the alternative implant restorative options to cement-retained crowns such as screw-retained restorations, screwless and cementless implant restorations, screw-retained-cemented implant crown, angulated screw channel restorations, the lingual locking screw-retained restorations and the multi-unit abutment restorations.
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Cranio-Facial Fibrous Dysplasia: A case report of a conservative treatment in a monostotic form associated with an orthodontic management and a bone graft of the non-lytic bone area for dental implant rehabilitation

Published on: 21st November, 2019

OCLC Number/Unique Identifier: 8405070202

Fibrous dysplasia is an osteolytic lesion in which bone is replaced by an instable fibrous osseous tissue. The aim of this case report is to highlight dental rehabilitation (bone grafts to allow dental implant) on patients suffering of this condition. A 39-year-old female with a hard-traumatic event in childhood desired a dental implant rehabilitation on her teeth 19 and 30 after an orthodontic alignment. A Cone-Beam Computed Tomography (CBCT) was performed showing a massive radiopaque lesion of the anterior mandible. The bone grafts and dental implants were successfully managed. A non-invasive treatment with regular follow up was chosen for this case. No evolution was noticed twenty-four month later at the follow up CBCT.
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Rehabilitation of hearing by cochlear implantation

Published on: 24th July, 2019

OCLC Number/Unique Identifier: 8206594527

Background: Cochlear implants (CI) are nowadays a widely accepted treatment for sensorineural hearing loss SNHL. Aim: This study aimed to describe the epidemiological characteristics and the surgical approach and to evaluate the outcomes of our experience in cochlear implantation. Setting: Department of Otolaryngology-Head and Neck Surgery of University Hospital Mohammed VI Marrakech Morocco. Methods: A retrospective chart review was conducted on 113 patients with severe to profound hearing loss who underwent a cochlear implantation between 2007-2018. Results: There were 65 females and 48 males with severe to profound bilateral deafness, of whom 103 had prelingual deafness. The mean age of pediatric cochlear implantation was 5.25 years. Implantation was unilateral in all patients. The procedure was followed by regular adjustments and speech therapy. The evaluation was carried out by the same team each month during the first 6 months, then every 6 months. The average duration of follow-up was 37.54 months. All patients benefited from their implants with inter individual variability. The good results were correlated with early implantation, significant parental investment and a steady follow-up of speech therapy. Conclusion: Cochlear implantation has revolutionized the management of severe to profound deafness. It is a safe and effective technique when it is aimed at correctly selected populations.
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“Vanishing” breast implant – when a breast prosthesis is moving into the pleural cavity

Published on: 4th August, 2021

OCLC Number/Unique Identifier: 9186946574

This case shown here represents a rare situation where the breast implant is spontaneously and inadvertently migrated from its submammary position via the thoracic wall into the ipsilateral pleural cavity after performing an ipsilateral thoracotomy due to atypical wedge resection of the right upper lobe four months ago. Intraoperatively, the implant has been neither dislodged nor manipulated in any way. In the literature, there are some sparse case descriptions where such breast implant migrations are encountered after VATS procedure (video-assisted thoracoscopy) [2] and open thoracotomy surgery [3]. Interestingly, our case report is quite similar to those which was published by Dutch colleagues in 2014 [4]. Considering the etiology and pathomechanism of such an implant migration as shown here, there is a common agreement that both a leakage of the implant´s fibrous capsule and an operative transection of the intercostal thoracic wall are prerequisite to create a potential migrating pathway to allow implants moving towards the pleural cavity [5]. Additionally, it is believed that the negative pressure within the pleural cavity also alleviates the unidirectional herniation by “sucking in the implant” into the interpleural space [6]. Sometimes, external repetitive pressures such as stretching massages may cause or trigger such an implant dislocation. Furthermore, there are cases described in which, seemingly, implant migration does occur without known preceding thoracic surgery [7]. Eventually, there are cases published in the literature with intrapleural spreading of disrupted breast implant debris [8]. With our patient, thanks to the absence of any discomfort or pain, it was concluded after agreed statement of an interdisciplinary round table discussion not to remove the dislocated implant surgically because of potential intercostal tissue damage and subsequent pain to await. More astonishing, the clinicians involved in this case wondered the fact that the missed implant of her right breast remained either unnoticed or has been completely neglected by the female patient. In this short communication, we present a rare and unusual case of an obviously vanishing breast implant which is found to be inadvertently migrated into the adjacent pleural space after undergoing thoracic surgery. According to common legal policy at our institution, an approval for case reports is generally provided as it was obtained in this particular case.
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Surgery and new Pharmacological strategy in some atherosclerotic chronic and acute conditions

Published on: 18th August, 2017

OCLC Number/Unique Identifier: 7317601909

Introduction In actual pharmacological therapy we can see that some drugs can be added to other medical instruments to improve their activity: in example we can see medicated stent for some coronary disease, or hormonal medical devices used in pregnancy prevention, but other example are known today. In example Carmustine wafer is delivered by delivery systems in some brain cancer and radioactive seed implants in prostatic cancer. Ocular intra vitreal implants for some macular degenerations (MABS or cortisones) other implants delivery systems drugs, naltrexone implant for opiate dependence. Other strategies imply carrier use to deliver the drugs in the site of action: In example MABS linked to radioactive isotopes in some relapse of severe Hodgkin disease but many other example we can see in therapy used today. So we can think that other chronic conditions can be treated using a combination of drugs with other instrument to improve the clinical outcomes. This to make possible that the ERLICH MUGIC BULLETS can act in the right site reducing the side effect. In example today we can see various medical interventional radiological strategy to treat in coronary and hearth disease with medicate stents positioning or to local use of contrast agents or other valvle surgery procedures with global good clinical results.
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Minimal treatment options with one-piece implants

Published on: 26th May, 2021

OCLC Number/Unique Identifier: 9070605670

The aim of this publication is to present case reports to show what is possible with pterygoid implants for the rehabilitation of edentulous space in the jaw (maxilla) while avoiding sinus lifts and bone grafting procedures. In addition, the added value of one-piece implants for screwed retention is elucidated.
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Biodegradation of gold and platinum implants in rats studied by electron microscopy

Published on: 27th November, 2019

OCLC Number/Unique Identifier: 8452128684

Graphical abstract Biodegradation of implanted gold in human tissue. TEM images reveal markedly biodegradation of implanted gold and re-crystallization of dissolved gold as nanoparticle of different size, shape and crystallinity. Highly crystalline icosahedral Au nanoparticle and the corresponding power spectrum are shown on top. Background: Despite the importance of biodegradation for the durability of metal prosthesis and the widely use of gold implants, there exist a lack of knowledge regarding the stability of pure gold in tissue. Methods: We studied biodegradation of grids of pure gold, nickel, and copper as well as middle ear prosthesis of gold, platinum or titanium. Metals were implanted into rat skin and humans. Dissolution and re-crystallization process of the metals was analysed using SEM, TEM, power spectra as well as elemental analysis by EDX and EELS/ESI. Results: Biodegradation of gold was detected, presumably by solving and re-precipitation of gold around implants. Gold cluster, nanoparticles, and mesostructures were detected, formed by dissolution and re-crystallization process. This process results into a migration of gold into the farer off tissue. Cellular filaments as biomolecular templates facilitate the formation of mesostructures. Loss of function of middle ear prosthesis by biodegradation is caused by chronic inflammation and fibrosis. Indeed, similar processes were detected with platinum, but in a very lower level. Conclusion: Noble metal implants undergo biodegradation in oxidative environment in tissue. The dissolution – recrystallization process can be explained by enzyme catalysed redox processes comprising reactive oxygen species and reduction agents as ascorbic acid present in cells and body tissue. Enymes like myeloperoxidase inside lysosomes of inflammatory cells produce hypochloride ions and H2O2 which can dissolve the gold. General significance: The crucial role of the specific chemical environments of gold implants in tissue for their chemical stability and durability of function has been demonstrated. Due to widely use and importance of gold implants, this finding is of general interes.
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What is the future for Scapholunate interosseous ligament reconstruction?

Published on: 31st December, 2018

OCLC Number/Unique Identifier: 7991699168

This opinion paper provides a summary of the current reconstructive surgical techniques for the scapholunate interosseous ligament (SLIL) and critically highlights their benefits and shortcomings. Due to limited success with direct repair of the ligament, current practice focuses on achieving biomechanical stabilization and does not allow for tissue regeneration to occur. In addition, the biomechanical behaviour of the ligament is still poorly described and understood, resulting in a very large variation in published mechanical parameters. Therefore, a thorough understanding of the biomechanics of the joint, via both experimental testing and numerical modelling is necessary for enabling the design of the next generation of implants in order to address mechanical stabilisation and regeneration.
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Cranioplasty with preoperatively customized Polymethyl-methacrylate by using 3-Dimensional Printed Polyethylene Terephthalate Glycol Mold

Published on: 30th November, 2018

OCLC Number/Unique Identifier: 7935923400

Cranioplasty is a reconstructive procedure for the repair of skull defects or deformities. Polymethyl-methacrylate (PMMA) is a commonly used alloplastic material when autologous bone is unavailable. However, manual shaping of bone cement for frontal and orbital bone defects is challenging and may not lead to cosmetically satisfactory results. Advances in computer-aided 3-dimensional (3D) design and printing technology allow the production of patient-customized implants with improved cosmetic and functional results. A 39-year-old female patient presented with right-sided frontal swelling and headache. Computerized tomography (CT) demonstrated a right frontal calvarial mass extending to the orbital wall. The boundaries of the lesion were marked using a 3D design software. A polyethylene terephthalate glycol (PETG) mold was manufactured with help of a 3D printer. Artificial bone flap was formed by pouring PMMA into the mold. After surgical resection of the calvarial mass, customized PMMA implant was applied with titanium mini plate and screws. The defect was closed properly with good aesthetic results. Production of customized PMMA cranioplasty implants with 3D printed molds is a useful technique and can be preferred for calvarial defects due to skull tumors, bone resorption and traumatic bone loss.
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How to avoid partial implantation of people with cochlear malformation

Published on: 14th November, 2022

Many advances have been made in recent years in the development of hearing and cochlear implants. These use acoustic and electrical stimulation technologies to improve speech intelligibility for the hearing impaired. However, for cochlear prostheses, the results are not very promising and vary from one patient to another. Certain technical and sometimes physiological problems have limited the expected performances of these devices, especially for children and the elderly. These problems include cochlear malformation and ossification of the auditory channels. This led us to reduce the number of electrodes in order to allow quality deep insertion while preserving the low-frequency acoustic bands of the operated patient.
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Review Article on the All-On-Four Treatment Concept in Dental Implants

Published on: 19th July, 2023

Edentulism, a condition characterized by the absence of teeth, significantly impacts facial aesthetics, eating efficiency, and speech fluency, thereby diminishing the quality of life. This paper aims to explore the All-On-Four Treatment Concept in Dental Implants, a promising solution to this issue. The All-On-Four approach, though complex, offers a pathway to restore smile and functionality by using four strategically positioned implants to hold a temporary prosthesis. This prosthesis is later replaced by a permanent version after approximately four months. This swift oral restoration technique significantly enhances a patient’s self-confidence and overall life quality. The significance of this treatment lies in its potential to provide a less invasive and more affordable solution for severe jawbone atrophy, where the proximity of critical anatomical structures and compromised bone conditions may hinder other prosthetic solutions. The paper concludes with a discussion on the potential of the All-On-Four treatment to revolutionize dental implant procedures, offering a beacon of hope for individuals suffering from edentulism.
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Hydrogel-Based Formulations for Drug Delivery to the Posterior Segment of the Eye

Published on: 12th September, 2023

Hydrogel-based formulations hold significant promise for treating ocular diseases that impact the posterior segment of the eye. These formulations exhibit the ability to surmount ocular barriers and offer sustained drug release, rendering them efficacious drug delivery systems. This article addresses the challenges linked to treating disorders affecting the posterior eye segment and underscores the imperative for less invasive drug delivery methodologies. We further delve into diverse contemporary ocular dosage forms, encompassing gels, nanostructures, and implants, with a specific emphasis on hydrogels. Hydrogels offer several merits, including precise targeting, sustained release, enhanced bioavailability, and non-invasiveness. Moreover, they curtail the risk of adverse effects and foster patient adherence. An enthralling advancement is the amalgamation of hybrid drug delivery systems, integrating nanoparticles, liposomes, dendrimers, and stimuli-activated nano-systems, with hydrogels for posterior eye ailment treatment. These hybrid nano-systems exhibit promise in enhancing drug stability, prolonging drug release, and pinpointing specific tissues within the posterior segment. We also provide an overview of ongoing clinical trials and approved hydrogel-based drug delivery systems, like Retisert and Ozurdex. These systems have demonstrated efficacy in managing chronic non-infectious uveitis, Age-related Macular Degeneration (AMD), and diabetic macular edema. Nevertheless, challenges persist, including optimizing bioavailability, maintaining drug stability, and implementing personalized treatment approaches. The incessant evolution of gel-based drug delivery systems stands to substantially enhance patients’ quality of life and establish new benchmarks in treating posterior eye diseases. The future of ophthalmology brims with excitement, as gel-based drug delivery systems hold the potential to revolutionize ocular therapies, providing effective remedies for an array of vision-related afflictions.
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Success, Survival and Prognostic Factors in Implant Prosthesis: Experimental Study

Published on: 19th December, 2023

The primary objective of this study was to detect the success and short-term survival rate of dental implant prosthetic therapy. The valuation of a possible relationship between the general and local clinical conditions of the patients (presence of risk factors and type of dental implant-supported prosthesis) and the satisfaction perceived by the patient, with success and survival of implant devices was investigated.The sample trial consisted of 23 patients, for a total of 50 dental implants supporting a prosthetic therapy. Preliminarily, an analysis of averages and frequencies of the anamnestic data was presented, as numbers and percentages. The implant success rate was calculated by assessing whether the implants fulfilled the success criteria defined by the Pisa Consensus Conference. The ANOVA test was used to check whether there was an association between the success of the implant device, the anamnestic data collected, and the type of prosthesis supported by the implants. Finally, the survival rate was calculated using the Kaplan - Meier method.The 2-year success rate of 50 implants was assessed at 98%. The 2-year survival rate was 97%. Finally, sex, age, compensated diabetes, a smaller and equal number of cigarettes per day (10 per day), the BOP, and the type of titanium dental implants supported by prosthesis, do not determine a change in success and are therefore not adequate parameters to predict the outcome of implant success. Following the results obtained, it is appropriate to continue the research by expanding the clinical observation times in order to obtain more solid scientific and clinical evidence.
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Bimatoprost Ophthalmic Solution (BOS) 0.3 mg w/v for 1 Open Trial of Long-term Preventive Therapy of Migraine in 3 patients with Pathophysiologic Shift from Brain to Eye

Published on: 9th November, 2023

Known since antiquity, migraine is a complex primary disorder, an episodic painful Autonomic Nervous System (ANS) storm, generally following the stress/post-stress phase. Despite exhaustive study of neuropeptides, neurochemicals, molecules, neurogenetics, neuroimaging along with animal and human experiments over the last 50 years, the scientific basis of migraine remains unknown. Straddling eight decades from Cortical Spreading Depression (CSD) to Calcitonin-Gene Related Peptide (CGRP) and its antagonists, exponentially increasing data have failed to create a gestalt synthesis. This article lays cohesive and robust fundamental principles for the comprehension and management of migraine. The continuum between migraine and non-congestive Primary Open-Angle Glaucoma (POAG), Normal Tension Glaucoma (NTG), or Low-Tension Glaucoma (LTG) is advancing. The case of sustained remission of migraine attacks (> 75%) over 3 years - 5 years with ocular hypotensive topical Bimatoprost Ophthalmic Solution (BOS) 0.3% in an N-of-1 trial in 3 patients with refractory migraine is presented. A cause-effect-adaptive process underlies the ANS-stress/post-stress-linked biology of migraine. Vasopressin-serotonin-norepinephrine ‘homeostatic-adaptive system’ Lowers Intraocular Pressure (IOP), while enhancing anti-stress, antinociception, vasomotor, and behaviour control functions, thereby selectively decreasing algogenic neural traffic in the ophthalmic division of trigeminal nerve (V1), and, raising the threshold to develop migraine. Striking migraine headache-aborting feature of vomiting is also likely linked to a several hundred-fold increase in arginine-vasopressin secretion. Eye-cover tests and self-ocular digital displacement are essential to studying the visual aura. Real-time physical displacement of Scintillating Scotoma (SS) and floating ‘stars’ is reported. The basis of spontaneous onset and offset, self-limited duration of migraine attacks, as well as female preponderance, and age/menopause decline in prevalence, are elucidated. Intraocular implants with long-term ocular hypotensive effects, including bimatoprost, are the future of migraine management. Controlled trials are required to establish the migraine-preventive effect of topical bimatoprost, a revolutionary advance in neuroscience.
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Hygiene and Care Protocols for Implant-supported Dental Prostheses in Patients with Diabetes

Published on: 21st February, 2024

Background: Prophylactic dental procedures following implant placement are critical to the long-term success of implants and are also dependent on the patient maintaining effective home care.Purpose: Evaluation of the effectiveness of preventive measures in patients with diabetes during long periods after prosthetic treatment with implants.Materials and methods: The study included 62 patients with diabetes with edentulism using 146 dental implants. Patients underwent constant monitoring, including regular occupational hygiene during follow-up examinations. Their frequency was set individually from 2 to 4 times A clinical index including Bleeding on Probing (BOP), Probing Depth (PD), and Marginal Bone Loss (MBL). Results: In patients included in the preventive protocol after 12 months, the mean BOP was 1.4 ± 0.15, and PPD was 2.46 ± 0.42. After 12 months in patients mean MBL was 0.72 ± 0.6 mm, after 3 years MBL was 1.24 ± 0.25 mm. For patients who were excluded from preventive services after 12 months, the mean BOP 1.9 ± 0.25, and the mean PPD was 3.56 ± 0.28). After 12 months in patients mean MBL was 0.87 ± 0.7 mm, after 3 years MBL was 1.52 ± 0.32 mm (p > 05). Compared to persons enrolled in the preventive protocol, those in the group without services were more likely to develop peri-implantitis (42.4% vs. 12,6%). The survival rate of implants after 3 years was 98.4%. The survival rate of implants in those patients who were excluded from preventive services after 3 years was 95.4%.Conclusion: For patients with diabetes, regular medical examinations, accompanied by professional oral hygiene procedures, prevent the development of negative reactions of the soft tissues surrounding the implant.
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