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Öğe Effect of different framework materials of resin-bonded bridges on load to fracture values and stress distribution(Wolters Kluwer Medknow Publications, 2018) Baran, Ilgi; Arslan, Merve; Gungor, HamiyetPurpose: The aim of this study was to compare in vitro fracture strengths (FSs) of metal- and fiber-reinforced frameworks of resin-bonded bridges and to evaluate stress distribution with finite element analysis (FEA). Materials and Methods: Totally 80 extracted maxillary central and maxillary canine teeth were used for in vitro part of this study as two groups; metal-reinforced framework (n = 20) [(metal-supported resin-bonded bridge (MR-RB)] and fiber-reinforced frameworks (n = 20) [fiber-reinforced resin-bonded bridge (FR-RB) were prepared for three unit resin-bonded bridges. All bridges were loaded from lateral pontic at 1 mm/min crosshead speed and fracture values were recorded. MannuWhitney U-test was used for statistical analysis, and fracture patterns were evaluated visually. FEA was carried out in the second part of the study, and stress distribution of MR-RB and FR-RB structures was analyzed using one of the models from in vitro specimens as main model. Results: The mean FSs of MR-RB and FR-RB were 637.47 151.91 N and 224.86 80.97 N, respectively. Fiber-reinforced specimens were found to distribute stress more homogeneous and connectors in each framework were the regions where stress concentrated mostly. Conclusion: In vitro FSs of MR-RB and the stress concentration of the point that the forces were applied were higher as compared to other parts of the restoration. Furthermore, in contrast to FR-RB specimens, retainer tooth fractures were observed in MR-RB specimens.Öğe Evaluation of panoramic radiography measures for identifying reduced bone mineral density in elderly(Gunes Kitabevi Ltd Sti, 2010) Nalcaci, Rana; Baran, Ilgi; Orkun, Sevim; Tosun, Aliye; Misirlioglu, MeldaIntroduction: The purpose of this study was to assess the validity of panoramic based indices (Mandibular cortical index, cortical width, panoramic mandibular index, and mandibular ratio) and to determine whether they correlate with bone mineral density in elderly. Materials and Method: The participants of this study were 120 patients; 53 males (45-83 years old, mean: 61.6 +/- 10.02) and 67 females (42-81 years old, mean: 60.58 +/- 9.15). Mandibular indices and number of teeth were measured and evaluated from panoramic radiographs. Bone mineral density (BMD) at the lumbar spine was measured by dual energy X-ray absorptiometry. BMD values were categorized as normal (T-score greater than -1.0), and as indicative of osteopenia (T-score -1.0 to -2.5) or osteoporosis (T-score less than -2.5) according to the World Health Organization classification. Results: There were statistically significant correlations between bone mineral density and sex, cortical width, mandibular ratio and mandibular cortical index (p<0.05). However, there were no significant correlations between panoramic mandibular index and bone mineral density. Also, there were significant correlations between mandibular cortical index and panoramic mandibular index (p<0.01), cortical width (p<0.05), mandibular ratio (p<0.05) and the number of mandibular (p<0.01) and maxillary teeth (p<0.05). However, there was no statistical significant difference between the mandibular cortical index and age (p>0.05). Conclusion: Mandibular cortical index can be used for identifying subjects with low bone mass, allowing the dentists to have sufficient clinical and radiographic information to play a useful role in screening for individuals with osteoporosis.Öğe Influence of Cantilever Extension and Crown-to-Implant Ratio in Posterior Maxilla: A Finite Element Analysis(Amer Scientific Publishers, 2018) Gungor, Hamiyet; Baran, Ilgi; Karaagaclioglu, LaleThis study aimed to evaluate the effect of increased cantilever extension length and crown-to-implant ratio on stress distributions, both in peri-implant bone and implant structure under oblique loads, using three-dimensional finite element analysis method. Six three-dimensional models of an atrophic posterior maxilla were created with a solid implant (4.1 x 10 mm) placed in first maxillar premolar site. One implant supported two-unit fixed dental prostheses were modeled using three different cantilever extension lengths (5, 7 and 9 mm) and two different crown-to-implant ratio (1/1 and 1.5/1). An oblique load of 300 N was applied to each model. The minimum and maximum principal stresses and von Mises stresses were evaluated. The highest minimum principal stress value was 129.8 MPa in cortical bone and the highest von Mises stress value at the implant structure was 449.3 MPa. Regarding the simulation outcomes it can be concluded that increasing cantilever extension length and crown-to-implant ratio will also increase the stress distribution in peri-implant bone and implant structure. While crown-to-implant ratio has greater effect than cantilever extension length in the stress concentration in cortical bone, cantilever extension length is found to be more prominent stress factor for the implant structure.Öğe Oral malodor and removable complete dentures in the elderly(Mosby-Elsevier, 2008) Nalcaci, Rana; Baran, IlgiObjective. The objectives of this study were to assess oral malodor in patients with removable complete dentures and analyze its association with age, sex, subjective oral dryness, burning mouth, tongue coating, and overnight denture wear in elderly subjects. Study design. The study comprised 105 complete denture wearers ( 56 male, 49 female) between the ages of 50 and 78 from the province of Kirikkale in the Central Anatolia Region of Turkey. Oral malodor was assessed using a portable sulfide monitor. Participants were given a self-administered, structured questionnaire. Baseline and final volatile sulfur compound (VSC) levels and tongue-coating scores (TCS) were measured. Analysis included frequency, cross-tabulations, ANOVA, and independent sample and paired t tests. Odds ratios of VSC-related factors were also calculated. A P value less than .05 was considered statistically significant. Results. There was no significant correlation found between age, gender, smoking, existence of a medical condition, or regular use of medication and VSC levels in mouth air ( P >.05). However, educational level ( P <.05), oral dryness ( P <.05), burning mouth ( P <.05), overnight denture wear ( P <.01), and TCS ( P <.001) were found to be significantly correlated with VSC levels. Significant differences were also found between baseline and final measurements of both VSC levels and TCS ( P <.01). Conclusion. This study found the accumulation of bacterial plaque on the tongue, oral dryness, burning mouth, overnight denture wear, and lower educational levels to be significantly related to oral malodor. Following tongue care maintenance and overnight removal of dentures, patients' oral malodor levels decreased significantly.Öğe A possible association of idiopathic osteosclerosis with excessive occlusal forces(Quintessence Publishing Co Inc, 2014) Misirlioglu, Melda; Nalcaci, Rana; Baran, Ilgi; Adisen, Mehmet Zahit; Yilmaz, SelmiObjectives: The aim of the study was to determine the relationship between idiopathic osteosclerotic lesions and occlusal forces using the T-Scan II computerized occlusal analysis device, and to test the sensitivity of the system in occlusal analysis. Method and Materials: The study was conducted with 21 volunteers with idiopathic osteosclerosis (IO; 14 women, 7 men) aged between 17 and 62 years (mean 29.95). For every patient, seven or eight recordings were made with the T-Scan II occlusal analysis device in maximum intercuspation, and the last two (excluding any with technical problems) were chosen for evaluation. For each lesion-related area, the distribution of high occlusal forces from two different movies was analyzed. Results: In 18 patients (85.71%), lesions were observed in an area of high occlusal force, and in 13 patients (61.9%), the lesions were located at the first area subjected to high occlusal forces. The percentage distribution of high forces at a lesion related area ranged from 0% to 88%. On average, the high forces at an osteosclerotic lesion area accounted for 20% of the maximum total force. No statistical differences were observed between the measurements of the two selected recordings (P > .05). Conclusion: The findings of this study suggest a possible relationship between IO and occlusal forces and primary contacts. T-Scan II was found to be a successful diagnostic device for detecting primary contacts and excessive occlusal forces.Öğe Prosthodontic treatment alternatives for geriatric patients(Gunes Kitabevi Ltd Sti, 2010) Baran, Ilgi; Bulut, Ali CanThe normal age-related changes at the masticatory apparatus are attrition of the teeth, loss of elasticity of the mucosa, reduction in the bulk and control of the masticatory muscles, arthritis in the temporomandibular joints, moderate reduction of taste perception and resting salivary flow rate, and periodontal attachment loss. These natural results of aging may become more pronounced with the presence of systemic diseases and become a real problem for geriatric patients. General health condition should be taken into account when considering the prosthetic treatments required to ensure masticatory efficiency and an aesthetic outlook throughout a long life. At the time of diagnosis and during treatment, the prosthetic systems applied in the transition from dentate to edentulous state are as follows sequentially: fixed prosthesis (if only a few teeth are missing); removable prosthesis (single jaw); removable prosthesis (two jaws); a combination of removable and total prosthesis; and then upper and lower total prosthesis.Öğe Self-reported denture hygiene habits and oral tissue conditions of complete denture wearers(Elsevier Ireland Ltd, 2009) Baran, Ilgi; Nalcaci, RanaThe aim of the study was to examine the influence of denture hygiene on the development and intensity of denture stomatitis and traumatic ulcers and their relationship to age, gender, educational level, smoking status, age of the denture, denture hygiene habits and denture-wearing behavior. The study population comprised 310 complete denture (CD) wearers (159 males and 151 females) aged 60-85 living in Kirikkale, Turkey. Denture hygiene habits were assessed and recorded, and any relationships between denture hygiene habits and the condition of oral tissue were assessed. The majority (48.4%) of participants reported cleaning their dentures with a toothbrush and toothpaste and 45.2% with a toothbrush only. Less than half (44.8%) removed their dentures overnight. Stornatitis was observed in 35.8% and traumatic ulcers in 29% of patients. A positive relationship was observed between poor denture hygiene habits and the presence of denture-related stomatitis and traumatic ulcers. The degree of denture hygiene was significantly associated with age, sex, education, general health status, smoking status, self-perception of halitosis, overnight denture removal and denture immersion habits. (C) 2008 Elsevier Ireland Ltd. All rights reserved.Öğe Self-reported problems before and after prosthodontic treatments according to newly created Turkish version of oral health impact profile(Elsevier Ireland Ltd, 2011) Baran, Ilgi; Nalcaci, RanaThe aim of the study was to assess patients' socio-demographic factors with their removable prosthesis in general, as well as to assess their problems with the functional limitation, physical pain, psychological discomfort, physical disability, social disability, and handicap investigate impaired oral health-related quality of life (OHRQoL) in patient treated with removable dentures before treatment and at 1 and 12 months after treatment. The first part of the questionnaire was comprised of 20 questions. It was designed in four different sections as: (i) general socio-demographic factors, (ii) general health, (iii) experience and use of dental and denture care, and (iv) anamnestic sign and symptoms of temporomandibular disorders (TMD). A statistical analysis system (SAS) was used for data management and analysis. Patient-reported problems were studied using the item list contained in the Turkish version of the oral health impact profile (OHIP) in a convenience sample of 136 prosthodontic patients before (m(0)), 1 month after (m(1)), and 12 months (m(2)) after treatment were then examined by using two-way ANOVA with repeated measurement. Differences in OHRQoL were present when item-specific prevalence was stratified by time of total scores; gender, residential area, working status, self-reported general health, smoking status, denture type, importance of the convenient dental care, trauma story, self-reported TMD/pain, and self-reported TMD/difficulty opening mouth wide. At baseline, the most prevalent frequently reported problems "difficulties chewing'' (49.3%), "digestion worse'' (40.4%), "take longer to complete a meal'' (36%), "food catching'' (30.9%), and "dentures not fitting'' (29.4%), and m2 the most prevalent frequently reported problems were "avoid going out'' (25%), "difficulties chewing'' (17.6), "sore jaw'' (15.5%), and "take longer to complete a meal'' (14%). The study confirmed that denture status is by far the strongest predictor of impaired OHRQoL compared to socio-demographic factors. Subjects with strong or moderate values had significantly fewer oral health-related problems (OHIP-extent) of time of total scores. The number of problems decreased substantially after prosthodontic treatment. The profile of pretreatment and post-treatment problems differed substantially, but in general, only a few problems remained after adaptation to new dentures. (C) 2010 Elsevier Ireland Ltd. All rights reserved.Öğe Temporomandibular disorders in older denture-wearing people(Gunes Kitabevi Ltd Sti, 2008) Baran, Ilgi; Nalcaci, Rana; Ucar, SedefIntroduction: The aim of this study was to evaluate the associations between temporomandibular disorders and socio-economic status, general-oral health, and dental status among patients with removable dentures. Materials and Method. The subjects of this study were 100 patients; 48 males (mean age: 60.52 +/- 7.98) and 52 females (mean age: 61.44 +/- 8.06), with removable dentures. The study group were evaluated in two groups; with complete (n=53) and removable partial denture (n=47) in terms of their socio-economic status, general and oral health and temporamandibular disorders. Statistical analysis included t-test and chi-square tests. Results: Statistically significant differences between socio-economic status, gender, age, occupational, general and oral health conditions were found between the groups. Younger females (SO years old) had significantly more frequent temporomandibular disorder symptoms. Variables related to impaired general and oral health were more common in the group with reported temporomandibular disorder problems, whereas satisfaction with received dental care and with denture was lower. Conclusion: Individuals who reported temporomandibular disorder symptoms differed significantly from those without temporomandibular disorder symptoms in socio-economic status, general and oral health symptoms, dental conditions and satisfaction with their denture.
