Journal of Nepalese Prosthodontic Society

Editorial

2019-05-25T10:51:03+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23855

Journal of Nepalese Prosthodontic Society (JNPS) editorial team proudly present the second issue of JNPS after the successful publication of first issue. We hope that our team had been able to open a new chapter in the history of Nepalese Prosthodontic Society (NPS). We are expecting to get similar support and encouragement from the new executive committee in the coming days.

First issue of JNPS covered the scientific papers ranging from research activities, review articles, innovative clinical and laboratory procedures and recent advances in material sciences and technology. We hope that it served the purpose of fostering knowledge and enhancing skill among academicians, clinicians and researchers alike.

Second issue of JNPS also tries to covers the wide variety of scientific papers. We would like to thank all the authors, reviewers, editors and contributors associated with this journal for their relentless eff ort to publish this issue. We would also like to thank all the readers and well-wishers for their valuable comments and suggestions for upgrading the quality of JNPS. We welcome your comments and suggestions in forthcoming issues too.

As editor-in-chief, I would like to thank all the editorial team of JNPS, executive committee and members of NPS, publication house and other persons, associated directly or indirectly, for their hard work, support and constant encouragement during the process of publication.

Comparison of Dimensional Accuracy of Cast Obtained from Polyvinyl Siloxane Impression with Different Putty-Wash Techniques and Spacer Thickness - In Vitro Study

2019-05-25T10:51:03+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23859

Introduction: Dimensional accuracy of cast obtained after making impressions is crucial factor for the quality of fixed prosthodontic treatment. The impression technique with different thickness of putty wash material is critical factor affecting this accuracy. There is much discussion in the dental literature concerning the effect of this impression technique on the accuracy of cast restorations.

Materials and methods: This in-vitro study was carried out in 60 impression made from master model with Polyvinyl siloxane impressions material using single step putty- wash technique and two step putty-wash technique with varying spacer thickness (0.5mm, 1mm, 1.5 mm). It was further divided into four groups. Group I: Single step putty-wash impression technique, Group II: Two step putty-wash impression technique with 0.5mm spacer, Group III: Two step putty-wash impression technique with 1mm spacer, Group IV: Two step putty-wash impression technique with 1.5mm spacer. Each group consists of 15 impressions. Casts were poured using type IV dental stone after 1 hour. After 24 hour the die of each cast was scanned using CAD/CAM digital scanner and measured mesiodistally, facio-lingually, height (cervico-occlusally), interabutment or interdie distances. The data were recorded and statically analyzed.

Results: The highest mean values of mesio-distal, bucco-lingual, cervico-occlusal distances were shown by Group I, whereas the inter-die distance showed equal mean value in Group I, II and III. With the increase in the spacer thickness, the mean value also increases in mesio-distal distance. The mean measurement of bucco-lingual dimension was highest when spacer thickness was 0.5mm and it declined with the increase in spacer thickness. The spacer thickness had no effect on cervico-occlusal and inter-die dimensions.

Conclusions: Within the limitations of the study, accuracy of cast obtained from single step putty-wash technique was more accurate than two step putty-wash technique. In two step putty-wash technique, 1.5 mm thickness of spacer showed more accurate cast in comparison to 0.5mm and 1mm.

Keywords: Dimensional accuracy, Die, Putty-wash technique, Spacer thickness

Dimensional Relationship between Maxillary Anterior Teeth and Inter Hamular Distance

2019-05-25T10:51:03+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23860

Introduction: Selection of anterior teeth for the fabrication of artificial denture during Prosthodontic rehabilitation is a complex process. Different authors have suggested various methods, however no single method can be used reliably to select artificial teeth. This study aims to assess dimensional relationship of maxillary anterior teeth with inter hamular distance which may assist in the artificial teeth selection.

Materials and methods: This clinical study was carried out on 95dentate subjects meeting the inclusion criteria. Prior to impression making, hamular notch was located precisely with T-burnisher and was marked with indelible pencil. Impression of maxillary arch was made using irreversible hydrocolloid impression material and casts were poured using Type III dental stone. Measurements were made directly on the cast using digital vernier caliper. The contact point widths of maxillary right and left maxillary central incisors, lateral incisors and canines were measured. The distance between the right and left hamular notch was measured. The sum of contact point widths of all maxillary anterior teeth was calculated. All the data were recorded and statistically analyzed.

Result: There is a positive correlation between combined width of maxillary anterior teeth and inter-hamular notch distance with Pearson’s correlation coefficient (r) 0.217 and p value 0.035 which is statistically significant.

Conclusions: There is significant correlation between combined width of maxillary anterior teeth and distance between right and left hamular notch. This correlation is valuable and practicable in estimating the six maxillary anterior teeth width.

Keywords: Complete dentures, Maxillary anterior teeth, Denture esthetics

Odontometric Analysis of Permanent Mandibular Canine to Determine Sexual Dimorphism: A Preliminary Study

2019-05-25T10:51:04+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23861

Introduction: Crown diameters of a teeth are reasonably accurate predictors of sex and are good adjuncts for sex determinations. The aim of the study was to determine the reliability of mesiodistal width of mandibular canine in sexual dimorphism.

Materials and methods: Medical students of Nepalgunj Medical College, Chisapani, Banke, Nepal were selected for data collection. Sample consisted of 300 subjects which included 150 males and 150 females of age group 18-25 years. The mesiodistal width of the mandibular right and left canine teeth were recorded by Vernier calliper. Descriptive statistical analysis was done from odontometric measurements data to calculate sexual dimorphism for mandibular right and left canine. The student t-test was used to determine the level of significance among the parameters measured.

Results: The mean values for mesiodistal width of mandibular right canine for male and female subjects were 7.1665±0.28576 and 6.3777±0.37875 respectively. The sexual dimorphism for mandibular right canine was calculated to be 12.368%. The mean values for mesiodistal width of mandibular left canine for male and female subjects were 7.3875±0.35506 and 6.2847±0.41115 respectively. The sexual dimorphism for mandibular left canine was calculated to be 17.5%.

Conclusion: Statistical analysis showed significant sexual dimorphism in odontometric analysis of permanent mandibular canines between male and female with the mandibular left canine showing the highest percentage.

Keywords: Odontometric analysis, Mandibular canine, sexual dimorphism

A Novel Technique of Repositioning Papilla to Create a Balanced Anterior Pink and White Esthetics

2019-05-25T10:51:03+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23862

The ultimate goal in modern era dentistry is to achieve the balance of “white” and “pink” in esthetically important zones. “White esthetics” is the natural dentition or the restoration of dental hard tissues with suitable materials. “Pink esthetics” refers to the surrounding soft-tissues, which includes the interdental papilla and gingiva that can enhance or diminish the esthetic result. This paper aims to describe a careful diagnosis and multidisciplinary treatment approach to achieve a satisfactory final esthetic outcome in a clinical scenario where there is an abnormal shape, position of tooth and displaced papilla in the anterior esthetic zone.

Keywords: Papilla, Pink and white esthetics, Teflon tape, Veneer

3D Guided Implant Surgery: A Case Report

2019-05-25T10:51:04+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23863

Dental implant has been established as one of the most predictable and conservative approaches for the rehabilitation of missing teeth. With the evolution of newer material and advancement in digital technology, specially in computed tomography, implant planning software and guided implant surgery, the outcome and success in implant dentistry has become more predictable. Computer aided design (CAD) technique is being integrated into treatment planning, and computer-assisted manufacturing (CAM) is becoming more popular for rehabilitation procedures. This case report illustrate the diagnosis, planning and application of 3D guided technology in dental implant surgery

Keywords: Dental implant, 3D CBCT, Guided implant, Flapless surgery, stereolithography

A Simplified Impression Technique for a Flabby Maxilla - A Clinical Report

2019-05-25T10:51:04+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23864

Flabby maxillary ridge is the most commonly encountered clinical condition during routine dental practice. The presence of these displaceable denture-bearing tissues often poses difficulty during fabrication of complete dentures resulting in compromised support, retention and stability. Many impression techniques and materials have been proposed in various literatures to help overcome this difficulty. These techniques vary in philosophies but are often quite time-consuming to perform, and rely on materials not commonly in use in contemporary dental practice. The purpose of this paper is to describe an impression technique for flabby ridges, using conventional impression material.

Keywords: Flabby denture-bearing tissues, Impression techniques, Impression material

Removable Prosthesis with Extra Coronal Attachment for the Management of Distal Extension Case: A Case Report

2019-05-25T10:51:04+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23869

Even though dental attachments have a long successful history, many of the dental practioners are unaware about its benefits in daily clinical practice. It highly improves the comfort, aesthetic, function and patient satisfaction, especially in the patients with long span edentulism where implants and fixed partial denture (FPD) are not indicated and cast partial dentures are barely satisfactory. This case report describes the clinical and the laboratory steps for prosthetic rehabilitation of a patient with maxillary distal extension partially edentulism with cast partial denture using Preci Vertex attachments.

Keywords: Attachment, Distally extended removable partial denture, Preci VertexAbstract

A Custom Made Post and Core Technique for Restoring Badly Broken Mandibular Posterior Tooth: A Case Report

2019-05-25T10:51:04+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23870

The successful treatment of a badly broken tooth depends both on good endodontic therapy and prosthetic reconstruction of the tooth. Molars with almost total coronal destruction can be salvaged by the use of customized post and core. A number of methods have been suggested for making a cast post and core using two or more of the canals to increase retention of the prosthesis. This case report discusses a method to restore a structurally compromised, endodontically treated mandibular first molar using a customized cast post and core.

Keywords: Endodontic therapy, Post and core, Molar, Structurally damaged tooth

A Comfortable Palatal Delayed Surgical Obturator for Hemimaxillectomy Patients

2019-05-25T10:51:04+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23871

A surgical obturator prosthesis is commonly used as an effective means for rehabilitating patient with hemi-maxillectomy defect. The obturator supports the soft tissues after surgery and minimizes the contraction of scar and disfigurement thereby making a positive effect on patient’s overall function and psychology. The goal of prosthodontics to restore missing orofacial structures for improving facial esthetics and oral function for such patients. The inability to achieve adequate retention, stability, support and comfort due to the friability of healing tissues are the common problems associated with prosthetic treatment in the initial phase of treatment. This case report demonstrates a simple technique to overcome such difficulties by the use of soft lining materials in the delayed surgical obturator.

Keywords: Hemimaxillectomy, Maxillofacial prosthesis, Soft liner, Surgical obturator

Fabrication of Radiographic Stent for Dental implants: A simplified approach

2019-05-25T10:51:03+00:00

DOI: https://doi.org/10.3126/jnprossoc.v1i2.23872

Keywords: Radiographic Stent, Dental implants