Full Denture Research Articles

Comparing the effect of occlusal adjustment using T scan and articulating paper on the vertical bone height changes around dental implants supporting lower single fixed detachable hybrid prosthesis

The Purpose of this study is to is to compare the effect of occlusal adjustment using T scan III and articulating paper on the vertical bone height changes around dental implants supporting lower single fixed detachable hybrid prosthesis Material and method: Fourteen male patients having completely edentulous mandibular arch and full dentate in the maxillary arch were selected from the outpatient clinic prosthodontics department faculty of dentistry Ain Shams University. All Patients were rehabilitated with six implants retaining mandibular fixed detachable prosthesis designed by CAD/CAM. According to the method of detection of occlusal errors and adjustment the patients were divided into two groups , Group I where T scan III device was used to detect occlusal errors and group II where articulating paper was used and occlusal adjustment were made according to the tool used. Radiographic evaluation using CBCT was done to evaluate the vertical bone loss around the supporting implant throughout the follow –up period. Results : There was increase in vertical bone loss in group I and II through-out the follow up period and on comparing the two groups there was a significant increase in the vertical bone height changes around the supporting implants in group I after one year from the follow up period Conclusion : Within the limitation of this study, it could be concluded that the use of t scan III device allow for better occlusal adjustment in case of implant supported lower single denture than articulating paper and resulting in less vertical bone loss

Implant loss and crestal bone loss in early loading versus delayed and immediate loading in edentulous mandibles. A systematic review and meta-analysis.

BackgroundInformation about the risk of early loss and crestal bone loss of dental implants which have been loaded early is scant if compared with data available for those conventionally or immediately loaded. A meta-analysis of early loss and crestal bone loss in immediate or delayed loaded full mandibular denture retaining dental implants has been recently published. It is interesting to evaluate also the risks of early versus immediate and delayed loading in complete mandibular restorations. The purpose of this systematic review and meta-analysis was to study early (EL) versus immediate (IL) and delayed loading (DL) protocols in edentulous mandibles to determine whether differences exist in implant success and crestal bone loss. Material and MethodsThe literature review was conducted in PubMed, Web of Science, and the Cochrane Library. Seven randomized clinical trials were included. ResultsThe result of a meta-analysis of implant loss before 1 year in EL versus IL was 0.34 (95% CI: 0.08, 1.52), favoring the EL control group, while the outcome for crestal bone loss at the three-year observation was -0.10 (95% CI: -0.28, 0.09), with a tendency toward reduced bone loss for EL. In the EL versus DL group, the result of the meta-analysis of implant loss before one year was inconclusive, while in the comparison regarding crestal bone loss in the first year of observation, the result was -0.03 (95% CI: -0.08,-0.02) with a tendency to less bone loss in EL. ConclusionsThe risk of early implant loss in the IL group was higher than in the EL group. The results in terms of early implant loss in EL versus DL are inconclusive. Besides, crestal bone loss is greater in immediately and delayed loaded implants, at 1 and 3 years of observation, compared to those loaded early. Key words:Dental implants, early dental implant loading, dental prostheses, implant- supported, alveolar bone loss, meta-analysis.

An update on CAD/CAM removable complete dentures: A review on different techniques and available CAD/CAM denture systems

(Times New Roman, 10, Bold) This article describes the different techniques and CAD/ CAM denture systems that are available. The fabrication of removable complete dentures by CAD/ CAM systems reduces chair side time and also number of appointments. If the dentures are lost or broken, it can be refabricated from the records saved digitally. The different CAD/ CAM denture systems evaluated in this article are AVADENT, the Whole You Nexteeth system, Ceramill Full Denture system, Baltic denture system and Wieland denture system and VITA VIONIC system. These systems differ in the number of appointments and the try in options provided by each of them.

Fechamento de fissura palatina com prótese total adaptada – relato de caso

In order for us to understand the objectives of treatment with a palate prosthesis, it is necessary, initially, to understand the speech production mechanism, as well as the suction mechanism performed during feeding. The palate prosthesis consists of a removable device that has a fixed extension towards the pharynx and bulb, whose function is to act on the dynamics and functionality together with the pharynx musculature, so that there is control of the oronasal air flow, being the most common the removable type, which can be total, when the patient has no teeth, or partial, when the patient has some teeth, which can be used as anchorage. Its preparation is made from a combination of acrylic resin with the appropriate steps for making a prosthesis. MDGAF patient, 67 years old, female, attended to the clinic of the Brazilian Postgraduate Institute IBPG, reporting functional and aesthetic dissatisfaction of her prosthesis, as she had teeth with wear, pigmentation throughout the prosthesis, speech difficulties, and swallowing. On clinical examination, it was found that it was not just a conventional full denture, but a conventional full denture adapted for patients with cleft palates. In the anamnesis, the patient reported that she was diagnosed in 2003 with poor basilar formation, and the main symptom was severe headaches. She sought a neurologist for such diagnosis, where three attempts were made to close the communication that were unsuccessful.

Nutrition education and mastication improvement through social services provision in Ketapang sub-district, Probolinggo

Introduction: A community-based exercise was implemented with the specific theme “Awareness raising among Family Welfare Program and Youth Organization group members of the importance of Family Nutrition Literacy and of nutrition education and mastication improvement through provision of removable dentures” in Ketapang sub-district, Kademangan district, Probolinggo. Aim: This community-based service was intended to inform the public of the importance of nutritional consumption to ensure a well-nourished family and enhanced mastication resulting from the use of removable dentures. This event was held in the middle of the COVID-19 pandemic. Methods: Two teams managing innovative and promotion were created. The role of the former was to conceptualize activities, while that of the latter was to directly inform the target community using a combination of printed and electronic media. These teams consisted of lecturers and 2nd year residents of the Department of Prosthodontics, Faculty of Dentistry, Universitas Airlangga. Results: The event involved the use of video conferencing through which residents delivered online counselling session to Family Welfare Program, Youth Organization group, and health cadre mem-bers who had already gathered at Ketapang Health Center, while maintaining physical distancing. Several residents worked on site alongside health cadres from the Ketapang Health Center. Given the ongoing pandemic, the teams decided to donate certain props: four full dentures, four removable partial dentures and four fixed partial dentures. Conclusion: Online counseling of the Ketapang Health Center cadres was expected to increase their awareness and comprehension of nutrition education and improvement in the mastication function of dentures through the use of teaching aids.

Possibilities and prospects in early orthopaedic rehabilitation of children with ectodermal dysplasia and congenital edentulism. clinical features and practical experience

The article is devoted to the issue of early orthopaedic rehabilitation of youngest preschool children with ectodermal dysplasia and congenital edentulism. The essence and details of children’s psychophysiological development at this age are revealed, as well as main pedagogical tools making it possible to adapt the children to the specific environment of the dental clinic and motivate them for undergoing long-term multistage orthopaedic dental treatment. Clinical approaches and peculiarities in the dentist’s work with children of different psychological types as well as particular aspects in their adaptation to removable dentures are described. Two clinical cases of effective orthopaedic rehabilitation of 3-years-old children with ectodermal dysplasia and congenital edentulism using full removable lamellar dentures.

DYNAMICS OF SOUND PRODUCTION DURING THE PERIOD OF ADAPTION TO FULL REMOVABLE DENTURES

Introduction. One of the most important social tasks is the protection and strengthening of people's health. In the modern world, there is a tendency towards an aging population that leads to an overall increase in disease and mortality. This situation is also directly associated with the deterioration of the oral health status of the population that leads to an increase in the number of patients with dentition defects. Especially marked morphological, functional and aesthetic changes in the maxillofacial region are due to anodontia. In dental practice, anodontia is usually corrected with complete removable dentures, and production of correct speech sounds is one of the main tasks when manufacturing and placing complete removable dentures. The purpose of this study was to investigate the peculiarities of the speech adaptation in patients wearing full removable dentures. Materials and methods. 2 groups of patients were created: the group A included patients having no dentition defects, and the group B, which involved patients with complete secondary adentia. The studies were carried out using the method of sound computer spectrography before prosthetic correction, immediately after the fixation of a complete removable denture, after in 3, 7, 30 days. Results and discussion. The method of sound computer spectrography enabled us to record the sound speech production in Ukrainian language by patients before prosthetic correction and during adaptation to the complete removable denture. The obtained graphs demonstrate qualitative differences between the sound production by the individuals having no dentition defects (control) and by the patients with complete secondary adentia. The graphs also demonstrate certain dynamic patterns of acoustic processes during the first 30 days of wearing the complete removable denture. Conclusion. Thus, the complete anodontia significantly reduces the force and clearness of most vowels. At the beginning of wearing the complete removable denture, usually in 3 days, the force of sounds [o], [u] and the sound frequency of [a], [o] are restored. Following the temporary deviation from the norm, the frequency and force of vowels are usually restored in 30 days.

MANUFACTURING OF FULL REMOVABLE LAMINAR DENTURES USING DIFFERENT GROUPS OF MATERIALS FOR DENTURE BASES AND THEIR COMPARATIVE CHARACTERISTICS

Restoration of complete maxillary or mandibular adentia, despite the advances of dentistry nowadays, has always been and is still remaining one of the most challenging among the clinical issues of orthopedic dentistry. The effectiveness of a high-quality complete removable denture is largely predetermined by the properties of the denture base material. However, long experience in manufacturing the dentures has revealed a number of their disadvantages. The development of new denture base materials and their studies have been being carried out for many years. The aim of this work was to investigate the effectiveness of thermoplastic base material "Vertex ThermoSense" (Netherlands) and fluorine-containing acrylic plastic "Ftoraks" (Ukraine) used in manufacturing the dentures for edentulous patients who previously worn full removable dentures made of acrylic plastic over the past 3- 5 years. We examined and treated 43 patients with complete anodontia who went to the orthodontic clinic to order a new denture. We used fluorine-containing acrylic co-polymers "Ftorax" (Ukraine) and polyamide (nylon) "Vertex ThermoSense" (Netherlands), recommended by manufacturers for making removable dentures. We assessed the level subjective satisfaction with new dentures in different follow-up time intervals, checked the restoration of the chewing function in the patients using electromyographic techniques. Clinical findings obtained supported the superiority of Vertex ThermoSense thermoplastic material over fluorine-containing acrylic resins in terms of high functional quality and strength that facilitate the durability of these complete dentures. In addition, the denture base made of "Vertex ThermoSense" does not contain residual monomer, thereby preventing the occurrence of allergic reactions. The results of our work allow us to strongly recommend the material "Vertex ThermoSense" to implement into prosthodontic practice for manufacturing complete removable dentures.

Multivariate analysis of the influence of peri-implant clinical parameters and local factors on radiographic bone loss in the posterior maxilla: a retrospective study on 277 dental implants

ObjectivesThe aim of the present study was to investigate whether peri-implant clinical parameters (modified plaque index (mPI), bleeding and/or suppuration on probing (B/SOP)) and local factors (type of prostheses, screw emergence, platform diameter, and abutment angulation) might contribute to the development of additional bone loss and peri-implantitis around dental implants.Materials and methodsTwo hundred seventy-seven external hex connection implants placed in the posterior maxilla of 124 patients were retrospectively evaluated. They were divided into two groups: physiologic bone loss < 2 mm (PBL) or additional bone loss ≥ 2 mm (ABL). GEE logistic regression was applied to evaluate the influence of type of prostheses (implant-supported single crown (ISSC), fixed partial denture (ISFPD), and full denture (ISFD)) and clinical parameters (mPI and S/BOP) on bone loss.ResultsAmong the 277 implants, 159 (57.4%) presented PBL and 118 (42.6%) presented ABL. Within the ABL group, 20.6% implants were diagnosed with peri-implantitis. mPI significantly correlated with the type of prosthesis and the highest value of mPI (index = 3) was observed in ISFD (23.8%). Moreover, peri-implantitis was more frequently associated with ISFD (32.79%) than ISSC and ISFDP (13.79% and 13.48, respectively)ConclusionsISFD in the posterior maxilla presented high rates of ABL and showed a higher prevalence of peri-implantitis. None of the local factors seemed to contribute to the development of these conditions. Further investigations are needed to prospectively support the results of the present study.Clinical relevancePatients rehabilitated with ISFD should be carefully monitored and have more frequent maintenance visits to prevent or control peri-implant bone loss.

Frequency Of Neck Disability Among Patients Wearing Complete Dentures

BACKGROUND: Temporomandibular disorder (TMD) is a collective terminology embracing a number of medical issues, which involve the masticatory musculature, the temporomandibular joint or both. Complete denture wearing most often not only effects TMJ but also effects the neck and its functionality.&#x0D; OBJECTIVETo assess the frequency and level of Neck disability among patients wearing complete dentures.&#x0D; METHODSIn this study a total of 100 complete denture wearing patients participated. Patients with any previous maxillofacial injury, trauma and below the age of 40 were excluded. Simple convenient sampling was used to collect all the data. Results: A total of 100 complete denture wearing patients participated in this study. The study included 50(50%) male and 50(50%) female with and average mean age of 57.68.&#x0D; RESULTResults showed 11(11%) experienced moderate recurring pain at neck movement, 10(10%) needed help every day in most aspects of self-care, 6(6%) patients wearing full dentures suffered from moderate neck pain or disability.&#x0D; CONCLUSIONThe study concluded that frequency and level of Neck Pain was variable among patients wearing complete dentures. Many of the full denture wearing patients experienced more than one clinical symptoms of Neck Disability.

Barcodes in Naming Basic Denture for Forensic Identification Needs

Background: discipline within Forensic odontology is a part of the science of forensic medicine whichrecently demonstrated its role in the identification of victims, often confronted with various obstacles, toslow down the investigation of the identity of the victim. There are obstacles in the identification process,partly due to the incomplete identification data that can be collected, so that the identification of the remainsbecomes difficult and requires a long time to be confirmed despite obtaining good professional managementin the identification process. The American Board of Forensic Odontology shows that most identificationuses teeth based on restorations, caries, missing teeth and / or prosthetic devices such as removable denturesof the victim. The necessity of naming the removable denture as the data themselves are attached to thepatient can facilitate the identification of Purpose: Knowing how to manufacture and benefits of identitywith a barcode on the denture in the easy identification of individual Methods: this research was preexperiment with only posttest design. By using 10 Full Denture samples, the sample collection was obtainedfrom the Lemeshow Formula. The ten research samples were taken by simple random sampling. Conclusionbarcode contain identity data embedded in the denture base can be used as labeling on denture users becauseof their role in knowing the identity of individuals , and hacyl of reading barcodes are not influenced by thelength of the base submerged .

Perilaku Pembersihan Gigi Tiruan Lengkap Pada Lansia (Observasi Pada Panti Werda Hana-Pamulang, Tangerang Selatan)

Background: Behavior in cleaning full denture in the elderly has an important role in the success of complete denture treatment. This behavior is important so that patients can maintain the cleanliness of full denture and the health of their oral cavity. Objective: This study aims to determine the full denture cleaning behavior in the elderly. Method: This type of research was descriptive observational with a cross-sectional design conducted on 32 elderly people in Hana Nursing Home, Pamulang, South Tangerang. The behavior of the elderly is measured through a questionnaire that has been provided previously. Results: The results of the descriptive statistical test showed that in general the behavior of cleaning of the elderly at the Hana Nursing Home had good results (46.9%). This good behavior is obtained based on good knowledge (59.4%), fairly good attitude (56.3%), and fairly good actions (53.1%). Based on gender grouping, it was obtained by the elderly group of men having full denture cleaning behavior which entered into a fairly good category (50%). Whereas the elderly woman in the Hannah Nursing Home has cleaning behavior that is included in the good category (50%). Based on age grouping, it can be seen that full denture cleaning behavior is good for the eldery age group (60-74 years), whereas in the old age group (75-90 years) and very old age group (&gt; 90 years) has a cleaning behavior is in fairly good category. Conclusion: The behavior of cleaning the full denture influenced by the knowledge, attitudes and actions taken by the elderly full denture users.

1607-P: Real-World Evidence of the Impact of Obesity on Residual Teeth in the Japanese Population

Previous studies have shown that diabetes and obesity increase the severity of periodontal disease—a well-known risk factor for tooth loss. However, the effect of obesity on tooth loss has not yet been fully characterized. Thus, we investigated the association between obesity and residual teeth (number and sites) using a large database of the Japanese population. We used the MinaCare database, composed of data from Japanese health insurance claims and health check-ups in 2015 to select 233,517 subjects from 706,150 based on the availability of BMI, HbA1c, teeth, and smoking information. Obesity was defined as BMI ≥25.0. The number of residual teeth at every age group was correlated with 4 BMI subsets (&amp;lt;18.5, 18.5-24.9, 25.0-30.0, &amp;gt;30.0). The unadjusted and adjusted odds ratios (ORs) for fewer than 24 residual teeth were estimated using logistic regression models. The number of residual teeth decreased with age (p for trend&amp;lt;0.001). Groups with higher BMIs had fewer residual teeth at all ages over 40s (p for trend&amp;lt;0.001). The number of residual teeth in the lowest vs. highest BMI groups in the 50s and 60s were 26.0 ± 3.2 vs. 25.2 ± 3.9 and 24.0 ± 5.0 vs. 23.3± 5.1, respectively. The negative effects of obesity on residual teeth were dominant in the right mandibular first molar. Additionally, smoking enhanced the effect of obesity. The OR for fewer than 24 residual teeth in obese people was 1.47 (95% CI: 1.43-1.52). Although diabetes (defined as HbA1c ≥6.5%) is an independent factor, the OR for fewer than 24 residual teeth in obese people after adjustment with sex, age, smoking status, and diabetes was 1.35 (95% CI: 1.31-1.40). Thus, obesity is an independent risk factor for tooth loss in the Japanese population, suggesting the importance of weight management to maintain oral health in obese people. Further studies are necessary to confirm our findings, due to limitations in our study such as data-availability from only the subject’s dental visit and the exclusion of full dentures and a small number of residual teeth. Disclosure M. Hayashi: Employee; Self; Sunstar Group. K. Morino: None. K. Harada: Employee; Self; Sunstar Group. M. Ishikawa: None. I. Miyazawa: None. A. Ishikado: Employee; Self; Sunstar Group. Employee; Spouse/Partner; Sunstar Group. H. Maegawa: Speaker’s Bureau; Self; Astellas Pharma Inc., Boehringer Ingelheim Pharmaceuticals, Inc., Daiichi Sankyo, Merck Sharp &amp; Dohme Corp., Mitsubishi Tanabe Pharma Corporation, Sanofi K.K., Takeda Pharmaceutical Company Limited.

1061 Problems During Daytime Due To Poor Sleep Are Associated With Indicators Of Poor Dental Health In A Largely Non-smoking Population

Abstract Introduction Growing evidence connects periodontal disease, a major and modifiable cause of local and systemic inflammation, with metabolic and cardiovascular morbidity and mortality, as well as mental illness. Sleep has been previously predictively associated with metabolic and psychiatric morbidity and mortality, and has recently been linked with periodontal disease. We are now evaluating associations between self-reported insomnia measures and surrogate indicators of periodontal disease in a population with a very low prevalence of smoking — a major confounder in previous studies. Methods Dental and sleep questionnaires (Pittsburgh Sleep Quality Index) were obtained from 3881 Old Order Amish from Lancaster county. Difficulty falling or staying asleep, sleep quality, problems during the day due to poor sleep, and sleepiness during daytime were related to self-reported loose teeth, partial dentures, full dentures and any dentures using linear models with adjustment for age and sex. Results Significant associations emerged between problems falling asleep and loose teeth (p&amp;lt;0.05), problems staying asleep and any dentures (p&amp;lt;0.05), sleep quality with loose teeth and partial, as well as complete dentures (p&amp;lt;0.05 for both). Problems during daytime due to poor sleep were associated with loose teeth (p&amp;lt;0.05), any dentures (p&amp;lt;0.003) and full dentures (p&amp;lt;0.0001 — the only associations resisting Bonferroni correction). Sleepiness during daytime, which is the most important marker associated with sleep apnea was not associated with any dental health measures. Conclusion Limitations include not accounting for family aggregation, limited generalizability, not fully differentiating between respiratory versus non-respiratory sleep impairment, and periodontal versus traumatic dental pathology. Yet, the results of our study, which minimizes the strong potential confounding by smoking, confirm associations between sleep-related problems and periodontal disease, and justify future longitudinal and interventional research to dissect causality and identify multi-target treatment modalities. Support This work was supported by the Mid-Atlantic Nutrition Obesity Research Center Preliminary Developmental NORC grant (Postolache, PI), a sub-award of the parent grant P30 DK072488 (Mitchell, PI), and intramural funds from the University of Maryland, Baltimore.

Ocena wpływu procedur klinicznych i wykonawstwa laboratoryjnego protez całkowitych na funkcje układu mięśniowo-stawowego pacjentów bezzębnych z zaburzeniami skroniowo-żuchwowymi

Ocena wpływu procedur klinicznych i wykonawstwa laboratoryjnego protez całkowitych na funkcje układu mięśniowo-stawowego pacjentów bezzębnych z zaburzeniami skroniowo-żuchwowymi

Comparison of the Accuracy of Three-Dimensional Printed Casts, Digital, and Conventional Casts: An In Vitro Study.

Objectives The integration of computer-aided design and manufacturing technologies in diagnosis, treatment planning, and fabrication of prosthetic restoration is changing the way in which prosthodontic treatment is provided to patients. The aim of this study was to compare the accuracy of three-dimensional (3D) printed casts produced from the intraoral scanner using stereolithographic (SLA) 3D printing technique, their digital replicas, and conventional stone casts. Materials and Methods In this in vitro study, a typodont of maxillary and mandibular arches with full dentate ivory teeth was used as a reference cast. The typodont was digitized using Trios 3Shape intraoral scanner to create digital casts. The digital files were converted into 3D printed physical casts using a prototyping machine that utilizes the stereolithography printing technology and photocurable polymer as printing material. Linear measurements (mesiodistal and occlusocervical) and interarch measurements (intercanine and intermolar) were made for digital and prototyped models and were compared with the original stone casts. The reference teeth were canines, first premolars and second premolars in the maxillary and mandibular arches on the right and left sides. The measurements on printed and conventional casts were done by digital caliper while on digital casts; Geomagic Qualify software was used. Statistical Analysis One-way analysis of variance (ANOVA) was used to compare measurements among groups. Results Digital casts showed significantly higher error than the other two groups in all linear and interarch measurements. The mean errors of the digital cast in occlusocervical (OC) and mesiodistal (MD) measurements (0.016 and 0.006, respectively) were higher compared with those in the other two groups (OC, 0.004 and 0.007 and MD, 0.003 and 0.005 [ p < 0.0001 and p = 0.02, respectively]). Also, digital mean error in intermolar width (IMW) and intercanine width (ICW) (0.142 and 0.113, respectively) were greater than the other two groups (IMW, 0.019 and 0.008 and ICW, 0.021 and 0.011 [ p < 0.0001]). However, the errors were within the acceptable clinical range. Conclusion The 3D printed casts may be considered as a substitute for stone casts with clinically acceptable accuracy that can be used in diagnosis, treatment planning, and fabrication of prosthetic restorations.

Association between oral health status and handgrip strength in older Korean adults.

Poor oral conditions in older adults are not limited to oral problems, which lead to physical problems. Prior research insufficiently has probed the relationship between oral health and physical function. This study investigated the relationship between oral health status and grip strength in older adults living in the community. This study used data from the 2014-2018 Korean National Health and Nutrition Survey. Oral health status was assessed by the type of dental prosthesis, the number of teeth. Grip strength was determined as the highest value among the three consecutive measurements of the dominant hand. The covariates included age, income, education, alcohol drinking, smoking, body mass index, sedentary time, comorbidity and number of caries teeth. Multiple logistic regression analysis was performed to examine the association between oral health status and grip strength. Data on 6,437 older adults (men 2766; women 3671) were analyzed. The mean age was 72.9 ± 0.1years. In the crude model of logistic regression analysis, both men and women had an association between full denture use and low grip strength compared to high grip strength. After controlling for covariates, the remaining 0-9 teeth was associated with low grip strength compared to high grip strength in men [odds ratio (OR) = 1.39, 95% confidence interval (CI) = 1.03-1.88]. The use of full dentures was also associated with low grip strength compared to high grip strength in men (OR = 1.47, 95% CI = 1.09-1.98). No significant associations were found in women. Low handgrip strength was associated with using full dentures and remaining 0-9 teeth in older men. Low grip strength, one of the key characteristics of sarcopenia and frailty, may serve as an important indicator of poor oral health, especially among men in late life.

ELECTROMYOGRAPHY INDICATORS IN DIFFERENT PERIODS OF USING OF THE REMOVABLE DENTURES IN PATIENTS WITH ACRYLATE INTOLERANCE

Despite the achievements in medical rehabilitation of patients with partial and complete absence of teeth, rehabilitation is not a definitely settled issue for orthopedic dentistry. According to the World Health Organization, about 26% of patients do not use full dentures for various reasons. The most common reasons for non-adaptive removable dentures are poor denture fixation or pain under prosthesis, which may be associated with the development of prosthetic stomatitis. We elaborated a method for the prevention and treatment of prosthetic stomatitis (toxic and allergic), using the magnetron coating with fullerene C60 surface of the prosthesis base.&#x0D; The aim of the research is the study of bioelectric activity of the masseter muscle in patients with manifestations of intolerance to acrylic base plastic after covering the prosthesis base with C60 fullerene in the observation period of up to 3 months.&#x0D; Material and methods of the research. We examined 29 subjects who presented to the orthopedic dentistry clinic for restoration of dentitions, using of partial and full laminar removable dentures. Patients were divided into 3 groups. The first group embraced patients with complete dentitions without dentures (9 people). The second group comprised patients who used partial and complete removable dentures with acrylic base for 1-3 months and they were diagnosed with prosthetic stomatitis (10 people). The third group included patients, implanted with partial and complete laminar removable dentures with the phenomena of prosthetic stomatitis, which underwent isolation of the prosthesis base using magnetron nano-coating with C60 fullerene (10 people).&#x0D; The functional state of the masseter muscles was determined by superficial electromyography, taking into account the condition of the prosthetic bed tissues and the period of using the dentures with nano-coating for 1 day, 15 days, 30 days and 2 months after denture placement.&#x0D; Results of the studies and their discussion. As shown by our studies, patients who used partial and complete removable prostheses with symptoms of prosthetic stomatitis (toxic and allergic stomatitis) demonstrated a significant effect on the bioelectric activity of the proper masseter muscles as compared with patients in group 1. The average amplitude of volitional compression was less at 2.8 times and the average amplitude of arbitrary chewing was less at 2.1 times, the dynamics of the states of rest and activity of chewing muscles was impaired. A reduction in the activity time and a slight increase in the resting time both on the working side and on the balancing side, as compared to patients in group 2 were observed in the first day after prosthetics with magnetron C60 fullerene nano-coating. Patients in group 3 demonstrated an increase in bioelectric activity (the amplitude of biopotentials increased), as compared with group 2, both in volitional compression and in arbitrary chewing. On the 15th day of observation, the electromyographic pattern in patients of group 3 changed and was characterized by a pronounced tendency to normalized indicators of the activity and rest time. The electromyogram amplitude of the masseter muscles increased significantly, but at this time the observations did not reach the values of group 1. One month after applying the dentures, electromyograms of patients demonstrated a more pronounced alternation of activity waves with periods of rest, the amplitude of biopotentials oscillation increases. One month after denture placement, the indicators of group 3 approached the data, obtained in patients of group 1. After conducting the electromyographic study within 3 months, we found that in group 3, the values of average amplitude of arbitrary chewing and the amplitude of volitional compression of the masseter muscles were 2 times higher than those of group 2. The time of activity and rest became more balanced and did not differ significantly from indicators in group 1.

Immediate placement of denture over undiagnosed ameloblastoma

Ameloblastoma is an odontogenic tumor that affects the bones of the jaw, often affecting posterior region of the mandible. It is a benign neoplasm and is fre­quently associated to an unerupted tooth. The purpose of this article is to report a case of failure in making an immediate full denture in a patient that had an ameloblastoma. A female patient aged 67 years complained of a hard swelling in the right mandible at the premolar region, that she noted after teeth extraction and confection of an immediate denture. Intraoral examination showed buccal and lingual cortical plate expansion and radiograph examination showed multilocular radiolucency with a well-defined margin. Fine needle aspiration was nonproductive and the provisional diagnosis was ameloblastoma. An incisional biopsy was performed and the histopathological report was conclusive of an acanthomatous ameloblastoma. The patient was sent for surgical excision of the lesion and after three years, the patient returned reporting that she was operated elsewhere in the past year and had an unsuccessful bone graft. She was sent to a prosthodontist to make a complete denture. In the present case the ameloblastoma was diagnosed only after the teeth extraction and immediate denture. KeywordsAmeloblastoma; Diagnosis; Mandibular neoplasms; Odontogenic tumors.

Consumption of dentures fixing agents and their impact on the oral mucosa of the prosthetic bed

The clinical and sociological study was conducted involving 283 (130 men and 153 women) patients aged from 45 to 92 years. All patients had acrylic removable dentures on one or both jaws. If patients had complaints about insufficient fixation of the denture, they were recommended to use a prosthesis fixing cream for daily use. After 14 days, patients were examined again for the dynamics of complaints, as well as changes in the mucous membrane of the prosthetic bed. Regardless of gender and age group patients using partial and complete dentures rarely (in 4.3% of cases) used dentures fixing agents, although 40.8% had poor fixation and (or) stabilization of removable acrylic partial and full dentures, and in 51.9% of cases inflammatory changes of the mucous membrane of the prosthetic bed were detected. Correction of removable dentures, as well as daily use of a denture fixation cream, made it possible within two weeks to reduce by 72.5% of patients complaints about poor fixation and (or) stabilization of removable dentures, as well as to eliminate existing inflammatory changes in 86.4% of patients.