Journal of Nepalese Prosthodontic Society最新文献

{"title":"Correlation of Inter-Canine Width of Maxillary Anterior Teeth with Interpupillary Distance and Inner Inter-Canthal Distance","authors":"S. Dhital, B. Ghimire","doi":"10.3126/jnprossoc.v6i1.58348","DOIUrl":"https://doi.org/10.3126/jnprossoc.v6i1.58348","url":null,"abstract":"Introduction: The selection of proper sized maxillary anterior teeth poses a challenge and numerous efforts have been made to develop methods for estimating the inter-canine width of maxillary anterior teeth. In this clinical study, the objective was to investigate the correlation between interpupillary distance (IPD), inner inter-canthal distance (ICAD) and inter-canine width of maxillary anterior teeth (ICW).\u0000Methods: The subjects were comfortably seated on a dental chair in a relaxed state in an upright position with the head resting firmly against the headrest. The parameters were measured using a digital caliper. To determine IPD, the midpoint of the pupils was marked and measured. Likewise, the width of ICAD was assessed by measuring between the medial angle of the palpebral fissure of the eyes. The inter-canine width of maxillary anteriors form the distal surface of left and right canines were measured with a dental floss, which was then sectioned and measured. Each parameter was measured thrice, and the average value was calculated and recorded.\u0000Results: Mean IPD, ICAD and ICW were 60.8 mm, 31.5 mm and 49.7 mm respectively. Statistical analysis revealed a highly significant difference between IPD and ICW teeth of male and female respectively. Spearman's rho analysis showed statistically significant correlation between ICW and IPD (r=0.156, p =0.006). Similarly, Spearman's rho analysis in male group also showed statistically significant correlation between ICW and IPD (r= 0.374, p=0.00025).\u0000Conclusion: This study concluded that there was significant correlation between interpupillary distance and ICW. The measurement of IPD can serve as a valuable reference for guiding the selection and placement of artificial maxillary anterior teeth.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130339612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cephalometric Assessment of Condylar Position among Individuals with Different Skeletal Malocclusion Patterns","authors":"P. Poudel, S. Dahal","doi":"10.3126/jnprossoc.v6i1.58350","DOIUrl":"https://doi.org/10.3126/jnprossoc.v6i1.58350","url":null,"abstract":"Introduction: There are variations in growth and orientation of cranial base region where the maxilla and mandible articulate. This leads to differential movement of the maxilla and mandible causing changes in glenoid fossa and condylar position. Therefore, this study was conducted to determine the condylar position in patients with different skeletal sagittal malocclusion patterns.\u0000Methods: An analytical cross-sectional study was conducted among 165 individuals, having skeletal Class I, Class II and Class III relationship (55 in each group) selected by convenience sampling method after receiving ethical approval and informed consent. Lateral cephalograms were taken and measurements for determining condylar position were done and compared among three groups. Data were analyzed in SPSS version 16. Kruskal-Wallis H test was used to determine the mean difference in between condylar positions of three skeletal malocclusion patterns and Mann-Whitney U test was done for their pairwise comparison.\u0000Results: There was no significant difference in posterior cranial base length (P=0.200) and saddle angle (P=0.517) in three skeletal malocclusion class groups. However, the three malocclusion patterns showed significant differences in gonian angle (P=0.001) and articular angle (P=0.013). Significant moderate negative correlation in saddle angle and articular angle (P<0.001) was observed.\u0000Conclusion: The findings of this study concluded that condylar position based on posterior cranial base length was not associated with different skeletal malocclusion patterns. However, articular angle was significantly lower in skeletal class III than in class II.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123485877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Cross Sectional Study for Assessment of the Pattern of Partial Edentulism in Various Municipalities of Kavre District","authors":"S. Basnyat, D. Prajapati, S. Mahanta","doi":"10.3126/jnprossoc.v6i1.58347","DOIUrl":"https://doi.org/10.3126/jnprossoc.v6i1.58347","url":null,"abstract":"Introduction: Partial edentulism refers to missing one or more natural teeth but not all. Classifying the partial edentulous arches is necessary as it helps in treatment planning, designing and recognition of prosthetic support for removable partial denture. The main aim of this study was to access patterns of partial edentulism among patients and determine its association with socio-demographic parameters.\u0000Methods: Patients from various municipalities of Kavre district were selected for the study. Total of 206 patients were selected. The study was divided into two part. Questionnaire related to demographic data and intraoral examination to evaluate the pattern of partial edentulism according to Kennedy's Classification and Applegate's rule. The chi-square test was used to determine the association between Socio-demographic variables and pattern of partial edentulism. Statistical evaluation will be done using the Statistical Package for Social Sciences (SPSS 20.0), the level of significance set at p-value <0.05.\u0000Result: The number of partially edentulous was less in the age group 20-30 years 38 (27.33%) and 45(28.48%) respectively, whereas, it was high in age group above 50 years 52 (37.41 %) and 57 (36.08 %) respectively. Kennedy's Class III was the most common type of partial edentulism in both maxillary arch 62 (48.82%) and mandibular arch 71 (46.71%) followed by Class I in both maxilla 31(24.41%) and 38(25%). The least common type of partial edentulism was found to be Class IV. Among the modifications Class III Modification I was the most prevalent condition in both maxillary 17 (27.42%) and mandibular arch 22 (30.9%).\u0000Conclusion: The study showed that age had statistically significant association with different classes of partial edentulism in both maxillary and mandibular arches. Whereas, gender had no association with the patterns of partial edentulism.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122337463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexural Strength of Heat Cure Denture Base Resin incorporated with Curcumin: An In-Vitro Study","authors":"LR Khanal, KR Joshi, Lecturer, Dr. Amar Bhochhibhoya","doi":"10.3126/jnprossoc.v6i1.58349","DOIUrl":"https://doi.org/10.3126/jnprossoc.v6i1.58349","url":null,"abstract":"Introduction: Acrylic resin when used for fabrication of denture is susceptible for microbial colonization. Many antimicrobial agents have proven effective against the microbial colonization when they were incorporated into the acrylic resin but adding anything into the acrylic resin can alter its mechanical properties resulting into unacceptable intraoral use. This study was done to evaluate ifadding an antimicrobial agent, Curcumin, alters the flexural strength of acrylic agent.\u0000Methods: 172 acrylic strips were fabricated. They were divided equally into 4 groups depending upon concentration of curcumin as Control, T1: 1% curcumin, T2: 3% curcumin and T4: 5% curcumin. Flexural strength was tested using 3-point bend test using Universal Testing Machine.\u0000Results: There was no significant difference in values of mean flexural strength for control, 1% and 3% curcumin groups. There was significant difference in the mean value between control and 5% curcumin group.\u0000Conclusion: 1% and 3% curcumin can be incorporated into acrylic resin without significantly altering its mechanical properties.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125976034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prosthetic rehabilitation in the Posterior Mandible with Tissue Level Implant: A Case Report","authors":"K. Lamichhane, S. Pradhan, R. Gorkhali, B. Shrestha","doi":"10.3126/jnprossoc.v6i1.58353","DOIUrl":"https://doi.org/10.3126/jnprossoc.v6i1.58353","url":null,"abstract":"Implant is becoming the most appropriate option nowadays for replacement of single or multiple missing teeth which offers the predictable long-term results. Continuous innovations in implant design and approaches for placement have been proposed to achieve good osseointegration, esthetics and predictable soft tissue contour. Soft tissue level (STL) implants are placed trans-mucosally with platform away from alveolar bone crest so the microbial deposits in the micro-gap at implant abutment connection has less effect on alveolar bone. This type of implant has a rough surface placed subcrestally to facilitate osseointegration and a polished coronal part to facilitate soft tissue adaptation. This case report highlights about soft tissue level implant, its advantages and clinical success on replacing single missing posterior tooth.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123104029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Increased Occlusal Vertical Dimension and Its Influence on Lip Position at Smile in Dentulous Adults","authors":"N. Dhyako, S. Mathema, K. Shrestha, SK Maharjan, B. Maskey, R. Gautam","doi":"10.3126/jnprossoc.v6i1.58351","DOIUrl":"https://doi.org/10.3126/jnprossoc.v6i1.58351","url":null,"abstract":"Introduction: Increasing occlusal vertical dimension (OVD) is often indicated in complex prosthodontic rehabilitations to gain restorative space and improve the occlusal relationship and esthetics. However, any alterations made in OVD will also influence the lip position mainly during rest and smile. This study aims to determine the influence of the vertical dimension of occlusion on lip positions at a smile.\u0000Methods: 30 samples between the age group of 20 - 30 years were included in this study meeting the selection criteria. The acrylic splint of varying thicknesses of +2mm, +4mm, +6mm, +8mm was prepared on the dental stone cast of a patient that was articulated in a semi-adjustable articulator after tentative facebow transfer. Smile photograph of each individual at the occlusal vertical dimension of +0mm, +2mm, +4mm, +6mm, +8mm was taken using a DSLR camera mounted on a tripod using the prepared acrylic splints. Digital measurements were done in photographs using the Adobe Photoshop software.\u0000Results: The study's results demonstrate that increasing the OVD significantly affects the inter labial distance, incisal edge to lower lip distance, and the display zone area. However, the study found no notable alterations in the distance from the incisal edge to the upper lip or in the intercommissural width with the same increased OVD. These findings demonstrate on how changes in OVD can influence various orofacial measurements.\u0000Conclusion: Within the limitation of this study, it can be concluded that with the increase in the OVD, inter labial distance, incisal edge to lower lip distance, and display zone area are increased. But upper lip position and inter commissural width should not be expected to be changed with increased OVD.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123620509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bar Retained Tooth Supported Overdenture: A Case Report","authors":"S. Bista, B. Sapkota","doi":"10.3126/jnprossoc.v5i2.55740","DOIUrl":"https://doi.org/10.3126/jnprossoc.v5i2.55740","url":null,"abstract":"Overdenture helps in preservation of the sensation of proprioception, maintains the border seal and provides the patient with good phonetics and chewing efficiency. The retention and stability of such prosthesis is enhanced greatly in bar-supported overdentures. This case report presents the step by step procedure for the fabrication of a canine supported hader bar mandibular overdenture that opposes a conventional complete maxillary denture. The bar was fabricated from pre-formed plastic bar, casted and female clips were attached in the mandibular denture. The mode of retention was primarily through frictional resistance.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126169691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Survival of Glass Ionomer Restorations in Primary Molar Teeth in a Tertiary Hospital in Chitwan","authors":"S. Adhikari, L. Tamrakar, R. Bhattarai, V. Thapa","doi":"10.3126/jnprossoc.v5i2.55736","DOIUrl":"https://doi.org/10.3126/jnprossoc.v5i2.55736","url":null,"abstract":"Introduction: Glass ionomer cement (GIC) is frequently used as a restorative material in dentistry and has been known for its anti-carious property, biocompatibility and good marginal adaptation. The study aims to evaluate the survival of GIC restorations on primary molar teeth of dental patients attending College of Medical Sciences, Chitwan.\u0000Methods: A retrospective longitudinal study was conducted among the patients who were treated with, at least one GIC restoration (GC Fuji II/GC Fuji IX GP) in their primary molars during the past three years. Data were collected to assess the demographic variables like gender, economic status and mother’s education; restoration-related variables like no of surfaces involved, type of material used, location of the restoration in oral cavity, and age of restoration and; outcome related variable i.e. survival of restoration (survived / failed). United States Public Health Service (USPHS) criteria was used to determine survival. Data analysis was done using software SPSS version 17. Chi-square tests were carried out to find out the association between dependent and independent variables. Significance level was set at p<0.05.\u0000Results: The 1-3 years cumulative survival rate of the GIC restoration in primary molars was found to be 74.5%. The survival rates for 1 year, 2 years and 3 years were found to be 93.5%, 78.6% and 62.5% respectively. There was no significant association between the survival of the restoration and location of the tooth in oral cavity and sociodemographic indicators like gender, age, economic status and mother’s education. However, statistically significant association was found between survival of restoration and type of restorative material, number of surfaces involved and age of restoration. Type VIII GIC had a higher survival rate (85.7%) compared to Type II GIC (68.2%), and single-surface restorations had a higher survival rate (84.9%) compared to two-surface restorations (52.3%).\u0000Conclusion: Our findings suggest that GIC can be used for restoring primary molars, particularly as single-surface restorative material. It also suggests that Type VIII GIC can more effective in restoring the primary molars as compared to the conventional Type II GIC.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122136505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Translucent Monolithic, Multi-Layered Zirconia: Matching Esthetics with Strength","authors":"A. Bhochhibhoya","doi":"10.3126/jnprossoc.v5i2.55730","DOIUrl":"https://doi.org/10.3126/jnprossoc.v5i2.55730","url":null,"abstract":"High esthetic demand of patients has led to the development of newer tooth-colored restorative materials. Yttria-stabilized Zirconia (3Y-TZP) ceramic is considered an acceptable material for prosthetic rehabilitation due to its high fracture resistance, biocompatibility, biomechanical stability, and better color matching compared to the traditional porcelain fused to metal restorations. Tetragonal stabilized polycrystalline zirconia (TZP: tetragonal zirconia polycrystal) is doped with 3 mol% yttrium oxide (3Y-TZP).The opaque appearance of zirconia is a key challenge in obtaining optimum esthetics. These restorations are typically veneered with a weak glassy phase ceramic to mask the opaque appearance. The risk of delamination and chipping of ceramic veneer from such layered prostheses is a major concern. High masticatory load in posterior teeth, poor framework design, inadequate thickness of ceramic veneer, contamination of zirconia substructure, low elastic modulus and thermal conductive of zirconia compared to veneer porcelain could be some of the factors leading to such catastrophic failures.Various methods have been developed to increase the translucency of zirconia such as increasing the percentage of the cubic phase, increasing sintering temperature, reducing impurities, altering yttria content, and reducing the grain size. With higher yttrium doping, the proportion of cubic phase zirconia is increased by 25 % for 4Y-TZP and 53 % for 5Y-TZP, which allows for improved translucency. However, with the increase in the cubic phase proportion, there is a risk of reduced strength, due to a reduction in the extent of transformation toughening.More recently, new monolithic multi-layer zirconia has been developed with a color gradient from the incisal to the cervical third, miming natural tooth color. Different grades of the translucent blank are available such as High Translucent Multi-layered (HTML), Super Translucent Multi-layered (STML), and Ultra Translucent Multi-layer zirconia (UHTML). Multi-layer zirconia discs consist of different layers with varying degrees of transparency: the outer enamel layer, transitions layers, and an inner body layer. This new innovative multilayer polychromatic zirconia blank allows technicians to work with a nearly universal zirconia blank. However, more researches ensuring the optimum mechanical properties of newer products are necessary before they can be safely used in all clinical scenarios.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117292813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detachable Cheek Plumper Using Orthodontic Lingual Button For Improved Denture Esthetics: A Clinical Technique","authors":"Manu Rathee, M. Alam, P. Jain, M. Kaur, S. Divakar, S. Chahal, S. Singh, SS Tomar","doi":"10.3126/jnprossoc.v5i1.53401","DOIUrl":"https://doi.org/10.3126/jnprossoc.v5i1.53401","url":null,"abstract":"Following loss of teeth and residual ridge resorption, facial esthetics is highly affected. The rehabilitation of lost structures should not be only aimed at replacing the lost teeth but facial changes associated with the edentulism should also be addressed. Objective of this technique article was aimed to improvise the excessive shrunken cheek appearance through fabrication of customized detachable cheek plumper. In this article, a novel, simple and easy technique has been described to fabricate a detachable cheek plumper for the management of shrunken cheek appearance using modified orthodontic lingual button and elastic tooth separator. Following fabrication of detachable cheek plumper and insertion, shrunken cheek appearance was improved and overall facial esthetic was enhanced. Cheek plumpers are simple to make and offer a noninvasive and cost-effective option for patients with sunken cheeks who want to improve their facial look. Patient’s aesthetics and psychological well-being benefit from this treatment. The use of detachable cheek plumper improves patient comfort, resulting in higher acceptance of the prosthesis.","PeriodicalId":247304,"journal":{"name":"Journal of Nepalese Prosthodontic Society","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131075188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}