RESUMO
Obstructive sleep apnea (OSA) is characterized by the complete or partial blockage of the upper airway passage during sleep which causes repetitive breaks in sleep and may result in excessive daytime sleepiness. OSA has been linked to various metabolic disorders and chronic health conditions, such as obesity, diabetes, hypertension, and depression. Profiling of alterations in metabolites and their regulation in OSA has been hypothesized to be an effective approach for early diagnosis and prognosis of OSA. Several studies have characterized metabolic fingerprints associated with sleep disorders. There is a lack of understanding of metabolite contents and their alterations in OSA that may help to identify specific biomarkers. The information provided in this review will help update new methodologies and interventions of high throughput advanced molecular/metabolomics tools which may clarify the metabolic aspects and mechanisms for improved management and treatment of OSA.
Assuntos
Hipertensão , Apneia Obstrutiva do Sono , Humanos , Metabolômica , Prognóstico , Hipertensão/complicações , BiomarcadoresRESUMO
STATEMENT OF PROBLEM: Objective assessments of the effect of mandibular advancement device on patients with obstructive sleep apnea are lacking. PURPOSE: The purpose of this clinical study was to compare levels of serum tumor necrosis factor alpha (TNF-alpha), Epworth Sleepiness Scale score, and Berlin Questionnaire score in patients with mild to moderate obstructive sleep apnea before and after treatment with a mandibular advancement device. MATERIAL AND METHODS: Twenty participants diagnosed with mild to moderate obstructive sleep apnea based on polysomnography testing were enrolled. A custom nonadjustable mandibular advancement device with 70% mandibular protrusion was provided for each participant for management of the obstructive sleep apnea. Evaluation of TNF-alpha levels was performed before treatment (baseline) and 3 and 6 months after starting mandibular advancement device therapy by using a Human TNF-alpha enzyme-linked immunoassay (ELISA) sandwich kit. The Epworth Sleepiness Scale and Berlin Questionnaire were also filled out by the participants at the same time intervals (α=.05). RESULTS: A statistically significant decline in the levels of TNF-alpha was observed at 3 and 6 months compared with baseline (P<.001). The Epworth Sleepiness Scale scores showed a statistically significant reduction at 3 and 6 months compared with baseline (P<.001). The risk of obstructive sleep apnea assessed by using the Berlin Questionnaire was found to be significantly reduced at 6 months compared with baseline (P=.001). CONCLUSIONS: Patients with mild to moderate obstructive sleep apnea showed reduced levels of TNF-alpha and Epworth Sleepiness Scale and Berlin Questionnaire scores when treated with a mandibular advancement device.
Assuntos
Avanço Mandibular , Placas Oclusais , Apneia Obstrutiva do Sono , Humanos , Avanço Mandibular/instrumentação , Apneia Obstrutiva do Sono/sangue , Apneia Obstrutiva do Sono/terapia , Sonolência , Resultado do Tratamento , Fator de Necrose Tumoral alfa/sangueRESUMO
STATEMENT OF PROBLEM: The reason for variations in peri-implant early crestal bone loss is unclear but may be due to genetic differences among individuals. PURPOSE: The purpose of this nested case control study was to investigate the association of single-nucleotide polymorphisms of interleukin-1, interleukin-6, collagen type I alpha1, and osteocalcin genes to early crestal bone loss around submerged dental implants. MATERIAL AND METHODS: Dental implants were placed in the mandibular posterior region (single edentulous space) of 135 participants selected according to predetermined selection criteria. Bone mineral density measurement by using dual energy X-ray absorptiometry, cone beam computed tomography scans at the baseline and after 6 months, and interleukin-1A-889 A/G (rs1800587), interleukin-1B-511 G/A (rs16944), interleukin-1B+3954 (rs1143634), interleukin-6-572 C/G (rs1800796), collagen type I alpha1 A/C (rs1800012), and osteocalcin C/T (rs1800247) genotyping were performed in all participants. Early crestal bone loss measured around dental implants was used to group participants into clinically significant bone loss (BL)>0.5 mm and clinically nonsignificant bone loss (NBL)≤0.5 mm. Early crestal bone loss was calculated as the mean of the difference of bone levels at the baseline and bone levels after 6 months as measured with cone beam computed tomography scans. The obtained data for basic characteristics, early crestal bone loss, and genotyping were tabulated and compared by using a statistical software program (α=.05). RESULTS: AA genotype and the A allele frequency of interleukin-1B-511 and GG genotype and the G allele frequency of interleukin-6-572 were significantly higher in BL than in NBL (P<.05). Multiple logistic analysis suggested that interleukin-1B-511 AA/GG+AG and interleukin-6-572 GG/CC+CG genotype expression were significantly associated with early crestal bone loss (AA/GG+AG; P=.014, GG/CC+CG; P=.047) around dental implants. Other risk factors were not significantly different (P>.05). CONCLUSIONS: Of the genes studied, individuals with interleukin-1B-511 AA (rs16944) or interleukin-6-572 GG (rs1800796) genotype had higher susceptibility to early crestal bone loss around dental implants.
Assuntos
Perda do Osso Alveolar , Doenças Ósseas Metabólicas , Implantes Dentários , Humanos , Implantes Dentários/efeitos adversos , Implantação Dentária Endóssea/métodos , Osteocalcina , Interleucina-6 , Colágeno Tipo I , Estudos de Casos e Controles , Perda do Osso Alveolar/etiologia , Interleucina-1 , Polimorfismo Genético , Doenças Ósseas Metabólicas/complicações , Planejamento de Prótese DentáriaRESUMO
STATEMENT OF PROBLEM: Clinical studies regarding satisfaction and occlusal forces with the complete denture in relation to the menopause are sparse. PURPOSE: The purpose of this clinical study was to compare satisfaction levels and occlusal force with complete dentures in premenopausal and postmenopausal Indian women. MATERIAL AND METHODS: Twenty premenopausal (group pre-MP) and 20 postmenopausal (group post-MP) completely edentulous participants were selected based on inclusion and exclusion criteria, and estradiol levels were measured. Complete dentures were delivered to all participants following standard fabrication and insertion protocols. Three months after denture insertion, when participants were free of postinsertion complaints, satisfaction level (by using a valid and reliable questionnaire), depression level by using the Patient Health Questionnaire, (PHQ-9) and occlusal force (with a gnathodynamometer) were measured. The obtained data of all parameters were tabulated and compared by using a statistical software program (α=.05). RESULTS: For questions pertaining to the overall satisfaction of maxillary and mandibular dentures, the 2 study groups encountered a significant difference with the premenopausal group showing significantly higher satisfaction levels (P<.001). Depression scores in the postmenopausal women group were significantly higher than those of the premenopausal women group (P<.001). A negative correlation was found between the overall satisfaction with complete dentures and depression levels in the participants indicating decreased overall satisfaction with increasing depression levels in participants (rho=-0.698). The premenopausal group recorded significantly higher estradiol levels than the postmenopausal group (P<.001). Mean occlusal force with complete dentures in the premenopausal women group was significantly higher than that of the postmenopausal women group (P<.001). A positive correlation was found between the estradiol levels and occlusal forces in the participants indicating that with decreasing estradiol levels, the occlusal forces decrease in the participants (r=0.740). CONCLUSION: Satisfaction levels and occlusal force with complete dentures were significantly higher in premenopausal women group than in the postmenopausal group.
Assuntos
Implantes Dentários , Boca Edêntula , Humanos , Feminino , Pós-Menopausa , Prótese Total , Boca Edêntula/psicologia , Estradiol , Satisfação do Paciente , MastigaçãoRESUMO
STATEMENT OF PROBLEM: Flapless implant placement with immediate functional loading has been reported in anterior locations. However, data on posterior locations are lacking. PURPOSE: The purpose of this randomized controlled trial was to determine and compare clinical outcomes of flap versus flapless surgically placed single posterior mandibular dental implants subjected to immediate functional loading. MATERIAL AND METHODS: Participants with missing mandibular first molar teeth were recruited and randomized into 2 groups (n=51): flapped and flapless. Dental implants were surgically placed and loaded immediately with interim restorations following implant protective occlusion. Outcome measures were implant failure, crestal bone loss, and periodontal parameters: modified plaque index, modified sulcus bleeding index, and pocket depths. Outcome data were recorded at baseline, 6-month, and 12-month follow-up visits. Cone beam computed tomography scans were used to calculate crestal bone loss, and periodontal outcomes were recorded by using a resin covered periodontal probe (α=.05). RESULTS: After 12 months, similar implant failure rates (P>.05) were found between the groups. Crestal bone loss in the flapped group was statistically higher than in the flapless group at 6 months (0.83 ±0.21 mm versus 0.75 ±0.23 mm) and at 12 months (1.04 ±0.27 mm versus 0.90 ±0.24 mm) from the baseline. The modified plaque index, modified sulcus bleeding index, and peri-implant probing depths (PDs) in both groups increased from the baseline to 6-month follow-ups (Baseline modified plaque index: 0.82 ±0.54 versus 0.79 ±0.21; Baseline modified sulcus bleeding index: 0.74 ±0.21 versus 0.70 ±0.43; Baseline PD: 1.25 ±0.37 mm versus 1.20 ±0.22 mm; 6 months modified plaque index: 1.54 ±0.70 versus 1.21 ±0.45; 6 months modified sulcus bleeding index: 1.93 ±0.54 versus 1.51 ±0.61; 6 months PD: 3.20 ±0.73 mm versus 2.80 ±0.43 mm). At 12-month follow-ups after repeated oral hygiene reinforcements, periodontal parameters had improved (decreased) significantly. CONCLUSIONS: Flapless implant insertion with immediate functional loading could be considered as an appropriate treatment option for providing functional restorations on the day of implant placement with minimal surgical intervention, reducing crestal bone loss, and periodontal complications.
Assuntos
Perda do Osso Alveolar , Implantes Dentários , Carga Imediata em Implante Dentário , Implantação Dentária Endóssea , Prótese Dentária Fixada por Implante , Seguimentos , Humanos , Mandíbula , Retalhos Cirúrgicos , Resultado do TratamentoRESUMO
PURPOSE: To compare concentration and release kinetics of osteocalcin and crestal bone loss under immediate and delayed loading conditions during osseointegration. MATERIALS AND METHODS: Forty-one patients who were indicated for rehabilitation with dental implants randomly received either implant with placement of permanent prosthesis after 3 months (delayed loading) or implant with placement of permanent prosthesis within 7 days (immediate loading). Radiographic assessment of crestal bone loss at the mesial and distal surface was done at 3, 6, and 12 months after implant placement. Peri-implant sulcular fluid was collected immediately from the buccal surface at two sites after implant insertion and also, at 7, 15, 30, and 90 days after surgery. The level of osteocalcin was evaluated using ELISA and data were compared using two sample t-test. Differences between two groups were analyzed by unpaired Student's t test. Intragroup comparison was done by repeated measures ANOVA. RESULTS: Mean crestal bone loss was lower in the immediate loading group compared to the delayed loading group at 3, 6, and 12 months (p < 0.001). Intragroup comparison revealed a statistically significant increase in osteocalcin levels in both group I (delayed loading) (F = 26712.2) and group II (immediate loading) (F = 10497.2) at the predetermined time intervals. CONCLUSIONS: Less crestal bone loss and early release of osteocalcin was found in the immediately loaded group than in the delayed loaded group. The study substantiates that immediately loaded implants show less crestal bone as well as early release of osteocalcin facilitating upregulation of bone metabolism, improving long term health of bone and prognosis of implants. Immediately loaded implants can be a better treatment protocol provided there is adequate bone and primary stability.
Assuntos
Perda do Osso Alveolar , Implantes Dentários , Carga Imediata em Implante Dentário , Perda do Osso Alveolar/diagnóstico por imagem , Implantação Dentária Endóssea/métodos , Prótese Dentária Fixada por Implante , Humanos , Carga Imediata em Implante Dentário/métodos , Cinética , OsteocalcinaRESUMO
The purpose of this study was to evaluate whether low-level laser therapy improves healing of the implant surgical site with clinical and biochemical parameters. Thirty patients with an edentulous space spanning a single tooth were selected. The patients were randomly allocated to 1 of 2 groups: control group and test group. The test group received laser energy at a power of 2 J/cm2 with a total of 4-6 J energy over each implant. Clinical parameters (implant stability quotient, probing index, modified sulcus bleeding index) and osteoprotegerin were assessed at baseline and follow-up intervals (2 weeks, 6 weeks, and 3 months). The test group showed significantly higher implant stability quotient than the control group at 2 weeks (57.93 ± 3.95 vs 35.67 ± 3.08; P < . 01) and 3 months (58.86 ± 3.75 vs 67.06 ± 3.78; P < . 01). A significant rise in osteoprotegerin levels of the test group (686.30 ± 125.36 pg/mL at baseline and 784.25 ± 108.30 pg/mL at 3 months; P < . 01) was seen contrary to significant decline in the control group (839.50 ± 249.08 pg/mL at baseline vs 415.30 ± 78.39 pg/mL at 3 months; P < . 01). Within the limitations of the study, the findings suggest that the healing of peri-implant hard and soft tissues may be enhanced with the use of low-level laser therapy as an explicit modality during the postoperative period.
Assuntos
Implantes Dentários , Terapia com Luz de Baixa Intensidade , Boca Edêntula , Implantação Dentária Endóssea , Humanos , CicatrizaçãoRESUMO
One of the difficulties faced during the essential and demanding step of fabricating a mold for a partial auricular prosthesis is the fracture of its most elevated part, which engages the remnant concha and triangular fossa region, because of the presence of excessive convolutions and undercuts. This technique describes a 4-part mold for a partial auricular prosthesis in which the most elevated portion is poured separately, thereby preventing mold fracture.
Assuntos
Implantes Dentários , Pavilhão Auricular , Orelha Externa , Desenho de PróteseRESUMO
Partial auricular prosthesis fabrication presents a more complex challenge than complete ear fabrication, with added aspects of merging/camouflaging a larger prosthetic marginal area, pattern try-in, and compromised retention. Better alternatives are excision of the remnant ear to make an implant-retained complete ear prosthesis or surgical reconstruction of the missing ear portion. Both need additional surgery/ies and expenses, neither of which may be acceptable to the patient. This report describes a prosthesis fabrication approach for such patients. This approach does not require implants or adhesives for retention. Issues of marginal camouflage and pattern trial were also addressed satisfactorily.
Assuntos
Orelha Externa/cirurgia , Próteses e Implantes , Desenho de Prótese/métodos , Retenção da Prótese/métodos , Adulto , Humanos , MasculinoRESUMO
PURPOSE: Continuous positive air pressure (CPAP) is recommended for obstructive sleep apnea (OSA) with type 2 diabetes mellitus (T2DM) but cost and compliance are major barriers. A mandibular advancement device (MAD) may be an economical, feasible alternative to CPAP. Various studies have been published to recommend MAD as an alternative to CPAP for OSA, but not regarding its efficacy for patients having OSA as well as T2DM. This study aims to objectively and subjectively evaluate oral appliance therapy using a MAD in patients having OSA as well as T2DM. MATERIALS AND METHODS: Patients who visited the hospital clinic having OSA as well as T2DM were recruited. After giving informed consent, participants were divided into three equally sized groups of three grades of OSA (mild, moderate, severe) on the basis of a polysomnography report and were given intervention of MAD at 50% of maximum mandibular protrusion and 20% of maximum interincisal opening. Objective outcomes were HbA1c level and apnea hypopnea index score (AHI). Subjective outcomes were Epworth Sleepiness Scale (ESS) and the Berlin Questionnaire. All outcomes were assessed before and after 3 months of intervention. RESULTS: A statistically significant difference was seen in all outcomes after intervention with MAD (p < 0.01) in all groups except HbA1c level in participants having severe OSA. CONCLUSION: MAD may be recommended in patients having OSA as well as T2DM. This study provides evidence to inform health care workers about possible use of MAD in OSA with T2DM.
Assuntos
Diabetes Mellitus Tipo 2 , Apneia Obstrutiva do Sono , Pressão Positiva Contínua nas Vias Aéreas , Hemoglobinas Glicadas , Humanos , Avanço Mandibular , Projetos PilotoRESUMO
STATEMENT OF PROBLEM: The use of mandibular advancement devices (MADs) in the treatment of sleep bruxism is gaining widespread importance. However, the effects of MADs on sleep bruxism scores, sleep quality, and occlusal force are not clear. PURPOSE: The purpose of this clinical study was to analyze the effect of MADs on sleep bruxism scores, sleep quality, and occlusal force. MATERIAL AND METHODS: This uncontrolled before and after study enrolled 30 participants with sleep bruxism. Outcomes assessed were sleep quality, sleep bruxism scores (sleep bruxism bursts and sleep bruxism episodes/hour), and occlusal force before and after 15 and 30 days of using a MAD. Sleep bruxism scores were assessed by ambulatory polysomnography and sleep quality by using the Pittsburgh sleep quality index (PSQI). Occlusal force was recorded by using a digital gnathodynamometer in the first molar region on both sides. Statistical analysis was done by 1-factor repeated measures ANOVA (α=.05). RESULTS: Statistically significant reductions in sleep bruxism bursts/h, sleep bruxism episodes/h, and PSQI scores were found after 15 and 30 days of using a MAD (P<.001). Statistically significant reduction in occlusal force on both sides was found only after 15 days (P<.001) but not after 30 days of using a MAD (P=.292 on left side, and P=.575 on the right side). CONCLUSIONS: The study showed a short-term improvement in sleep bruxism scores, sleep quality, and reduction in occlusal force in sleep bruxism participants after using MADs.
Assuntos
Avanço Mandibular/instrumentação , Bruxismo do Sono/terapia , Sono/fisiologia , Adolescente , Adulto , Força de Mordida , Feminino , Humanos , Masculino , Avanço Mandibular/efeitos adversos , Polissonografia , Adulto JovemRESUMO
PURPOSE: To determine whether a fixed partial denture (FPD) or an implant replacement of a single missing tooth leads to better masticatory efficiency and patient satisfaction. MATERIALS AND METHODS: One-hundred and twenty participants with missing mandibular right first molars were selected on the basis of predefined inclusion and exclusion criteria. After obtaining informed consent, 60 participants were randomized to the teeth-supported (FPD) group and 60 to the implant placement group (IMP). The study was divided into the following parts: (i) Completion of a Likert scale satisfaction questionnaire (postrehabilitation) by the participants. (ii) Evaluation of masticatory efficiency and performance 3 months after rehabilitation. Data were evaluated by applying t-test and z-test using statistical analysis (α Ë 0.05). RESULTS: Masticatory efficiency of participants in the IMP and FPD groups was 74.95 ± 0.90% and 74.41 ± 3.35%, respectively (p = 0.607). Total satisfaction questionnaire scores for the two groups were also not significantly different; however, the mean scores of overall satisfaction and function categories in this questionnaire were significantly higher for the IMP group, while the mean score for the duration of treatment question was higher for the FPD group (p < 0.05). CONCLUSION: The results of this study suggested that although masticatory performance and efficiency were not statistically different for single teeth replaced with implants or FPDs, patients perceived higher satisfaction with implant restorations; they also preferred the shorter treatment times for rehabilitation in the FPD group.
Assuntos
Prótese Dentária Fixada por Implante , Prótese Parcial Fixa , Mastigação , Dente Molar , Satisfação do Paciente , Perda de Dente/cirurgia , Adulto , Prótese Dentária Fixada por Implante/psicologia , Prótese Parcial Fixa/psicologia , Humanos , Masculino , Mandíbula , Pessoa de Meia-Idade , Inquéritos e Questionários , Resultado do TratamentoRESUMO
STATEMENT OF PROBLEM: Numerous studies of the efficacy of immediately placed implants have been published but only a few of the comparative analyses of the early loading of delayed versus immediately placed dental implants. PURPOSE: The purpose of this pilot prospective clinical study was to evaluate and compare the outcomes of early loaded delayed versus immediately placed implants. MATERIAL AND METHODS: Eighty-eight participants satisfying predefined inclusion and exclusion criteria were selected for this pilot prospective study of 3 years' duration after obtaining institutional review board approval and informed consent. The immediate and the delayed implant placement group each consisted of 44 participants. The anterior mandible canine region was the implant placement site for all participants, and all implants were of the same size and manufacture. Participants were evaluated for hard (crestal bone loss and stability) and soft (periimplant probing depth) tissue implant success parameters at 6 and 12 months after implant placement. Data were analyzed, and results were computed. RESULTS: Intergroup comparisons for mean mesial, mean distal, and mean crestal bone loss at 6 and 12 months after immediate and delayed implant placement showed statistically insignificant differences (P≥.05). Intergroup comparisons of mean mesial, mean distal, mean labial, and mean lingual and mean pocket depth at 6 and 12 months also showed statistically insignificant differences (P≥.05). Comparative mean values using the Periotest also demonstrated statistically insignificant differences (P≥.05). CONCLUSIONS: The short-term outcomes of early loaded delayed and immediately placed implants were comparable. Therefore, early loaded immediately placed implants may be a promising option for the mandibular anterior region.
Assuntos
Implantação Dentária Endóssea , Carga Imediata em Implante Dentário , Adulto , Perda do Osso Alveolar/epidemiologia , Perda do Osso Alveolar/etiologia , Implantação Dentária Endóssea/efeitos adversos , Implantação Dentária Endóssea/métodos , Humanos , Carga Imediata em Implante Dentário/efeitos adversos , Carga Imediata em Implante Dentário/métodos , Mandíbula/cirurgia , Pessoa de Meia-Idade , Projetos Piloto , Estudos ProspectivosRESUMO
PURPOSE: To assess dietary and nutritional changes among the elderly following pros-thodontic rehabilitation. Another objective was to study the relationship, if any, between diet and nutrition, with extent of edentulism and different types of prosthodontic treatment. MATERIALS AND METHODS: One hundred and thirty-five patients who satisfied the inclu-sion and exclusion criteria and agreed to be a part of the study after informed consent were recruited to this longitudinal study. Following selection, they were investigated on four aspects: dental examination, dietary assessment, anthropometric assessment, and serum biochemical assessment. All measurements were collected twice, first at baseline and then 6 months following prosthodontic rehabilitation. Treatment modalities included were complete denture (CD), removable partial denture (RPD), and fixed partial denture (FPD). The RPD group was of two types: distal extension prosthesis (RPDD) and tooth-supported prosthesis (RPDT). Change (post-pre) in outcome measures was compared by one-way ANOVA, and significance of mean difference between the groups was done by Tukey's honestly significance difference post hoc test. RESULTS: The improvement in diet was found to be: CD > RPDD > RPDT > FPD. Significant improvement in weight (p < 0.001), BMI (p < 0.001), protein (p < 0.001), carbohydrate (p = 0.021), calorie (p < 0.001), iron (p = 0.002), and vitamin B (p < 0.001) in group CD as compared to partially edentulous patients (group RPDD + RPDT + FPD) was noted. The protein and calorie intake increased significantly in group RPD as compared to group FPD in partially edentulous patients. CONCLUSION: Prosthetic rehabilitation becomes increasingly important as the level of edentulism increases to improve dietary, anthropometric, and biochemical parameters.
Assuntos
Prótese Parcial Fixa , Prótese Parcial Removível , Prostodontia , Idoso , Prótese Total , Humanos , Arcada Parcialmente Edêntula , Estudos LongitudinaisRESUMO
The Kennedy Class I and II distal extension situation poses a challenge to the prosthodontist as it inherently possesses a lack of stability, which may be attributed to the difference in compressibility of the mucosa and the periodontal ligament surrounding the distal-most abutment tooth. This results in a rotational tendency of the prosthesis around the line connecting its terminal abutments. Placement of osseointegrated dental implants in the posterior edentulous regions, distal to the terminal abutment provides improved vertical support to the distal extension removable partial denture, effectively converting its intraoral performance from a Kennedy Class I to a Class III situation, thereby resulting in improved stability of the prosthesis and consequently, enhanced patient satisfaction. This case report describes such an approach to the restoration of a Kennedy Class I partially edentulous situation.
RESUMO
Pattern formation is the most difficult and demanding step in the fabrication of a facial prosthesis. Traditionally, the pattern fabrication of an orbital prosthesis begins with the adaptation of softened base plate wax on the cast, over which the entire pattern is fabricated. However, owing to the inherent properties of wax, such as distortion and stress relaxation, incorporating discrepancies in the pattern adaptation is likely. This article describes a vacuum-formed polyvinyl chloride sheet to fabricate a durable, distortion-free base for pattern fabrication, thereby overcoming the drawbacks associated with a wax base.
Assuntos
Materiais Biocompatíveis/química , Implantes Orbitários , Cloreto de Polivinila/química , Desenho de Prótese , Olho Artificial , Humanos , Propriedades de Superfície , Vácuo , Ceras/químicaRESUMO
BACKGROUND: The issue of biomaterial-derived ionic release in various sites of the human body has attracted the interest of many investigators because of the possibility that debris or degradation products elicit a foreign body reaction or have a role in the induction of pathological processes. PURPOSE: The purpose was to evaluate the saliva of denture wearers after insertion of the prosthesis for leaching of metals from metallic denture. MATERIALS AND METHODS: Total 20 subjects of age group of 40-60 years including both males (10) and females (10) were selected for the study. Total subjects were divided into 2 groups each containing 10 subjects, Group I (control group): Subjects having dentition intact up to second molar and free of any dental restoration; Group II (study group): Partially edentulous subjects rehabilitated with cast-metal removable partial denture. Saliva samples were taken at three stages that is, 1 h, 24 h and 72 h after the denture insertion from subjects of study group as well as from the control group. Atomic absorption spectroscopy (AAS) was used to estimate the concentration of elemental ions. Obtained data's were analyzed using SPSS (Statistical Package for Social Sciences) version 15.0 statistical analysis software. The values were represented in a number (%) and mean ± standard deviation. RESULTS: At 1 h, 24 h and 72 h after the denture insertion in study group, chromium (Cr) had statistically significant higher mean concentration as compared to manganese (Mn) (P < 0.001). Cr had maximum concentration (0.1479 + 0.0052) immediately after denture insertion while maximum concentration of Mn (0.1479 + 0.0052) was found 24 h after denture insertion. CONCLUSION: Metal-based dentures show maximum leaching immediately after wearing of the prosthesis which decreased significantly over the period of 3 days. Cr and Mn were the metal ions mainly found in saliva of cast partial denture wearer. No concentration of cobalt, molybdenum (Mo) and iron (Fe) was found in saliva of metal base denture wearer. There was a significant change in concentration of elutes in saliva in first 72 h/3 days making time an effective variable was observed.
RESUMO
This case report describes a series of four cases of different age group, in which a simplified approach was applied for positioning the iris disc on a custom made ocular prosthesis. For each of the patient, a pre-fabricated eye was selected; whose iris and pupil closely matched that of the natural eye. This was duplicated for use as a tray in impression procedure. Iris portion of the stock eye was trimmed out and oriented on the cast according to previously transferred pupillary mark. This stock eye-wax pattern combination was tested in the eye socket, modified accordingly and finally cured in transparent heat cured acrylic resin. The technique to fabricate ocular prosthesis in present case reports modifies pre-fabricated eye prosthesis to a custom-made fit and aesthetics. This helped us to overcome the disadvantages of poor fit, inadequate movement and complex painting procedure and technique involved in making a custom-made ocular prosthesis. It can be concluded that close adaptation of the custom-made ocular prosthesis to the tissue bed provides maximum comfort and restores full physiologic function to the accessory organs of the eye.