The Journal of Indian Prosthodontic Society最新文献

Aim: To assess the relationship between oral health related quality of life (OHRQoL) and gerotranscendence among elderly subjects in Davangere city.

Settings and design: Field Setting and cross-sectional survey design.

Materials and methods: Study involved a stratified sample of 400 elderly population aged 60 years and above. Data related to demographic details, systemic and oral health related factors, nutritional status, gerotranscendence level and geriatric oral health related quality of life of study participants was recorded using study proforma, Mini Nutritional Scale Assessment- Short form (MNA-SF) index, Gerotranscendence Scale Type 2 (GST2) questionnaire and GOHAI questionnaire respectively.

Statistical analysis used: Significance level was fixed at P < 0.05. Chi-square, Pearson's/Spearman's correlation and Multiple linear regression tests were used for analysis.

Results: Participants had good oral health related quality of life (mean GOHAI - 41.33±10.8) and moderate level of gerotranscendence (GST2- 19.5 ± 8.7). The gerotranscendence scores were significantly (P<0.05) negatively correlated with socioeconomic status (r = -0.19), education (r = -0.55), self-perceived oral health (r = -0.43), nutritional status (r = -0.64), GOHAI (r = -0.17), utilization of dental services (r = -0.26) and marital status (r = -0.39) and were significantly (P < 0.05) positively correlated with age (r = 0.77), systemic problems (r = 0.49), number of missing teeth (r = 0.57), self-perceived need for treatment (r = 0.24), and pan chewing (r = 0.62). Gerotranscendence was not a significant predictor of GOHAI (P = 0.43).

Conclusion: Gerotranscendence was negatively correlated with oral health related quality of life among elderly population in Davanagere city.

The importance of a judicious and unerring abutment tooth preparation in the field of prosthodontics has always been paramount. It is not uncommon for many clinicians to face challenges during laboratory fabrication of fixed prostheses, caused due to inappropriate occlusal clearance and over axial wall taper of the abutment tooth. With evolving technologies and methods, the modus operandi for attaining such tooth preparation is varying; however, every technique has its own shortcomings. The technique mentioned in the article is cost-effective as it uses modified Heister mouth gag forceps to achieve the desired objective of evaluating the prepared abutment morphology three-dimensionally with minimum chairside time.

Aim: To evaluate the changes in temporomandibular joint (TMJ) vibrations after insertion of the complete denture in edentulous patients.

Settings and design: An observational in vivo study conducted to evaluate the changes in maximum mouth opening, total integrals, peak amplitude, and peak frequency in TMJ vibrations on the day of complete denture insertion and 6 months of follow up.

Materials and methods: Twenty patients (male: 12 and female: 8) were selected for the fabrication of balanced complete dentures following conventional procedure. Joint vibration analysis was recorded using the joint vibration analyzer. The patients were instructed to open as wide as possible and close to the intercuspal position with rhythmic speed following the metronome projected on the screen. The TMJ vibrations were amplified and displayed as waveforms in a graphical representation by system software.

Statistical analysis used: Wilcoxon test.

Results: A significant decrease in the total integral (P = 0.001) and peak amplitude (P = 0.044) for opening and closing movements of the left and right joints was observed. There was no significant change in maximum mouth opening (P = 0.624). A decrease in peak frequency was noted only at left opening movements between the day of insertion and at 6 months (P = 0.025).

Conclusion: The function of TMJ mechanics was improved till 6 months after insertion of complete denture with balanced articulation (BA).

Aim: The present study assessed the impact of demographics and tobacco habits on oral health related quality of life (OHRQoL) among complete denture patients.

Setting and design: Prospective cohort study design.

Materials and methods: Two hundred and eighty four edentulous patients, aged above 30 years, were chosen as the sample for the study after taking informed consent. Information regarding demographic data and smoking status was obtained from each participant. OHRQoL was evaluated using the Oral Health Impact Profile Edentulousness (OHIP EDENT) quantifying various domains, namely functional limitation, physical pain, psychological discomfort, physical disability, psychological disability, social disability, and handicap.

Statistical analysis used: Data were analyzed using the Statistical Package for the Social Sciences version 23.0 (IBM; Chicago, Illinois, USA). Mann-Whitney U test was applied to find significant differences in OHRQoL between gender, age, and smoking status. P < 0.05 was considered to be statistically significant.

Results: It was seen that complete denture wearers above 65 years had higher OHIP EDENT scores as compared to younger counterparts suggesting the compromised quality of life in the functional domain which was statistically significant. Psychological discomfort was greater in females while physical disability seemed higher in males. Smoking was found to be a factor associated with decreased OHRQoL.

Conclusion: Older age groups, female gender, and smoking were factors associated with decreased OHRQoL among complete denture patients.

Aim: The purpose of the present study was to examine the optical properties, chemical composition, and grain size (GS) of monolithic zirconia (MZ) ceramic at different thicknesses sintered using different procedures after hydrothermal aging.

Settings and design: An in vitro study.

Materials and methods: Forty MZ discs (0.5-mm thickness [Group-0.5] and 1-mm thickness [Group-1]; 12 mm diameter) were milled and divided according to standard (Group-ST) and speed (Group-SP) sintering procedures. All specimens were hydrothermally aged at 134°C after sintering. Translucency (TP), opalescence (OP), and fluorescence (ΔE_abFNx01-FL) parameters were calculated using the color coordinates (LFNx01, aFNx01, bFNx01, respectively) of the discs. The chemical composition and the GS of the specimens were characterized using X-ray fluorescence spectroscopy and a scanning electron microscopy, respectively.

Statistical analysis used: TPs and ΔE_abFNx01-FLs were analyzed using independent samples t-tests and Mann-Whitney U-tests while a two-way analysis of variance (ANOVA) was used for OPs.

Results: Group-1 showed significantly lower TP than Group-0.5 (P < 0.001) but a significantly higher OP (P = 0.014). Group-SP showed significantly higher OP (P = 0.00003) and ΔE_abFNx01-FL (P = 0.0026) values than Group-ST without considering the thickness. Group-SP (0.29 ± 0.119 μm) had a smaller GS than Group-ST (0.306 ± 0.142 μm). Compared to Group-ST, Group-SP had a lower percentage of Y₂O₃ and a higher percentage of Al₂O₃.

Conclusion: The effect of the sintering procedure on TP and OP of MZ was not perceived by the naked eye. The speed sintering procedure may increase Δ E_FNx01ab-FL of MZ to higher values than natural teeth when compared with standard sintering. The speed sintering may cause minor changes in GS and the chemical composition of MZ.

Dementia in Alzheimer's disease complicates the caregivers in tracking the patients. Many options are discussed in the literature. A novel technique is essential to improve the quality of life and to assist in locating the patients. The Global Position System (GPS) trackers are attached to dentures and the movements are observed through a mobile application. This technique discusses on a simple method of tracking Alzheimer's edentulous patients with the support of removable dentures. Denture tracking devices are a secured form of tracking patients. A GPS device in dentures assists in locating the patient's movement and supports the caretakers.

Aim: The fabrication of an accurate prosthesis depends mainly on precise recording of the maxillo-mandibular relationship of the patient and transferring it to the articulator. BDIMPRESS is a new thermoplastic material that has been proposed as a potential material to be used as an inter-occlusal registration, but there has been no literature evidence regarding its application as a bite registration. The main purpose of this study is to evaluate and compare the dimensional stability, detail reproduction, and compressive resistance of new interocclusal recording material with other two commonly used materials.

Settings and design: In Vitro Comparative study.

Materials and methods: The study was conducted according to ADA Specification standards of testing for dimensional stability, detail reproduction and compressive resistance. Specimens were prepared for three different materials (Thermoplastic resin, Polyvinyl siloxane, and Bis- acrylic) with 12 samples each.

Statistical analysis used: One way ANOVA was done for statistical analysis.

Results: Polyvinyl siloxane material was dimensionally stable (mean at 1 hr: 24.928 mm; 24 hrs: 24.919 mm & 48 hrs: 24.912 mm) followed by Bis- acrylic material (mean at 1 hr: 24.851 mm; 24 hrs: 24.825 mm & 48 hrs: 24.815 mm). On one way ANOVA, strong significance was observed between groups (P = 0.00). Thermoplastic resin showed higher amount of detail reproduction with 10 (out of 12 samples) samples showing satisfactory results. While bis- acrylic material showed the least compressive resistance (Strain %: 0.484%; Displacement- 0.0990mm). One-way ANOVA showed presence of significance between the groups (P = 0.024).

Conclusion: Polyvinyl siloxane showed superior dimensional stability, thermoplastic resin showed better detail reproduction and bis- acrylic showed high resistance to compression over other materials.

Aim: The aim of this study was to compare the wear behavior of human tooth enamel opposing monolithic zirconia and layered zirconia after glazing and polishing by a two-body wear mechanism using a wear simulator.

Settings and design: This In-vitro study was done in Department of Prosthodontics, Sri Sai College of Dental Research, Vikarabad.

Materials and methods: Zirconia specimens were divided into four groups (n = 15), Group monolithic glazed zirconia (MG), Group monolithic polished zirconia (MP), Group zirconia layered with E. max ceram and glazed (LG), Group zirconia layered with E. max ceram and polished without glaze (LP). Sixty human premolar teeth were subjected to wear test against the zirconia specimens using a Pin on Disc wear tester under a constant load of 5 kg (49 N) at 30 rpm for 10,000 cycles. The loss of enamel was recorded before and after the wear test and mean loss of height of tooth enamel after 10,000 cycles of wear was measured with a profile projector. The surface characteristics of all the four group zirconia specimens were evaluated qualitatively with scanning electron microscope.

Statistical analysis used: One way ANOVA, Tukey Post hoc.

Results: One-way analysis of variance test revealed that the mean loss of enamel of four groups was statistically different with P < 0.001. A further Tukey post hoc test revealed that the MP group had lesser mean scores than group LP, MG, and LG.

Conclusion: It was concluded that MP caused less wear to opposing natural teeth, and polished surfaces of both monolithic and layered zirconia showed less tooth wear compared to glazed surfaces of monolithic and layered zirconia.

Aim: Aim of this in vivo study was to assess the impact of two rehabilitation philosophies namely; Pankey Mann Schuyler (PMS) & Hobo Twin Stage (HOBO) on Oral Health-related Quality of life (OHRQoL) using Oral Health Impact Profile (OHIP 14).

Settings and design: This was a randomized clinical trial.

Material and methods: This study was designed based on the PICOT model. 40 patients were selected who need to undergo complete mouth rehabilitation. The intervention performed was complete mouth rehabilitation therapy and the results were compared with that of no intervention. The outcome was assessed in terms of improvement in mastication, phonetics, esthetics and overall OHRQoL (OHIP-14) over a period of 01 year at intervals of 48 hrs, 01 mon, 6 mon and 12 months. Patients were unaware of the treatment philosophy being used and were given a questionnaire (OHIP-14); at baseline (pre-treatment) and 48 hrs, 1, 6 and 12 months after completion of treatment (post-treatment) to evaluate OHRQoL. The data was collected by independent reviewers blinded to the regimen followed making the participants and the outcome assessors blinded to the procedure.

Statistical analysis: Independent Student's t-test and Chi-Square test were used for analysis.

Result: Analysis illustrated significant differences in scores obtained pre-treatment and post-treatment in both groups at 12 months (P < 0.05). At 12 months, OHIP-14 scores showed a mean percentage change of 51% in Group A (PMS); (P = 0.001) and a mean percentage change of 49% in group B (Hobo).

Conclusion: Complete mouth rehabilitation therapy for management of generalized attrition or mutilated dentition is a viable and effective treatment option and brings about definitive improvement in Oral Health Related Quality of Life (OHRQoL) and overall health status of an individual.