Journal of Nepalese Prosthodontic Society

Denture Cleansing the Natural Way: A Review

S Shrestha — 2023-12-31

Dentures are used to replace the missing teeth and are specially used by the elderly population. Though it helps in the function of digestion and improves the facial appearance, its cleansing should be given utmost importance. Denture hygiene, if unmaintained, leads not only to oral diseases but also to systemic diseases. The conventional cleansers come with a certain degree of side effects along with the high price. So the use of natural denture cleansers may be a boon.Various researches have shown the efficacy of the natural herbs in single or multi component form. Herbs are rich in phytotherapeutic compounds like polyphenols, flavonoids, aromatic compounds, organic acids, silica, resins, vitamins and tannins. This review highlights some of the researches validating the herbal way to clean the denture cleansers and keep the oral cavity healthy. Most of the herbs used contain a number of antioxidants and may further enhance the immunity system and boost the systemic health as well. Hence, backed with proper evidences through researches, herbal denture cleansers may be a readily available tool for cleansing dentures and a promising source of generating healthy smiles of the elderly.

Effect of Increasing Occlusal Vertical Dimension on Smile Parameters

S Pahari — 2023-12-31

Introduction: Increasing Occlusal Vertical Dimension (OVD) becomes important aspect of complex prosthodontic treatment for maintaining balance between form of oral structures and function of stomatognathic system. The purpose of this study is to determine the effect of increasing OVD on various smile parameters during posed smile.

Methodology: This observational descriptive study included 30 patients, 14 male and 16 females, visiting dental department of National Academy of Medical Sciences (NAMS), Bir Hospital. Four polyvinyl siloxane bite records were fabricated on stone cast mounted on a semi-adjustable articulator increasing OVD by +1 mm, +2 mm, +3 mm and +4 mm taking incisal pin as a reference. Photographs of posed smile were taken at OVD of +0 mm, +1 mm, +2 mm, +3 mm and +4 mm using a DSLR camera mounted on a tripod. Head position was stabilized using a head positioning device of a cephalometric unit during photography. Adobe photoshop CS6 extended was used to calculate the various measurement in pixel which was converted into mm with help of conversion ratio obtained. Data were then processed and analyzed using SPSS software at the 5 % significance level.

Result: One-way repeated measures ANOVA found statistically significant differences in interlabial gap height, incisal edge to lower lip distance, smile index and display zone area with increasing OVD. No statistically significant differences were found for intercommisural width and incisal edge to upper lip distance.

Conclusion: Within the limitations of this study, the excessive increase of OVD may lead to excessive interlabial gap height, incisal edge to lower lip distance, and display zone area. Also, the increase of OVD may lead to reduced smile index. No change may be expected in the position of the upper lip with increase of OVD. In addition, a change in the intercommisural width of the smile should not be expected with increasing OVD.

An Evaluation of the Curve of Spee in the Maxilla and Mandible of Human Permanent Healthy Dentitions: A Cross Sectional Analytical Study in a Group of Nepalese Population

S Dhital — 2023-12-31

Introduction: Familiarity with the typical measurements of the maxillary and mandibular curves of Spee can assist clinicians in formulating sagittal plane occlusion and proves beneficial in delivering prosthetic rehabilitation for patients with occlusal derangement. The objective of this study is to evaluate and compare the radius and depth of the Spee curve in the maxillary and mandibular arches among both male and female individuals within young Nepalese population.

Materials and Methods: The study comprised 21 men and 21 women aged between 18 and 30 years. Alginate impressions were made for both the maxillary and mandibular arches and dental stone casts were subsequently created. Digital images of the right side of maxillary and mandibular dental casts were captured using a digital camera and subsequently transferred to a computer. The tips of the distal cusps of molars, premolars, and canines in both the maxillary and mandibular arches were identified. Utilizing the computer software (Corel DRAW), the radius and depth of the Spee curve were measured based on the digital photographs of the dental casts.

Results: The results indicated a substantial difference in the depth of the Spee curve between the mandibular and maxillary arches (p<0.001), with the mandibular arch displaying a significantly greater depth. Furthermore, the Spee curve was notably deeper in females (p=0.045) compared to males. However, there was no statistically significant difference in the depth of the Spee curve in the mandible between genders (p=0.171).

Conclusions: The radius of the Spee curve was unaffected by the gender or arch of the subjects under investigation. Nevertheless, the Spee curve was observed to be significantly flatter in the maxillary arch when contrasted with the mandibular arch. Additionally, a notable difference in the depth of the Spee curve was identified between females and males, with females displaying a greater depth.

Tooth and Gingival Display at Posed and Spontaneous Smile

G Devkota — 2023-12-31

Introduction: Amount of gingival display is one of the important aspect of smile esthetics parameter which allows the clinician to accurately diagnose and select an appropriate treatment plan for the patient. The purpose of this study is to evaluate the amount of teeth and gingival display in posed and spontaneous smile by using videography method.

Methodology: A cross-sectional, observational study was conducted among 144 participants. Standardized videography of the participants were taken with DSLR. Video clips were taken for tooth display at rest, posed smile and spontaneous smile. Digital recordings were transferred to laptop and measurements of the dentogingival display were made by importing frames in Adobe photoshop CS6 extended software. The type of smile line were recorded based on the dentogingival display at posed and spontaneous smile. Data were entered and analyzed in excel 2016. Parametric (quantitative) data were interpreted as mean ± SD and Non parametric (qualitative) data were interpreted as percentile. To compare parametric data student t test was used and for non parametric data chi square test was used.

Result: There was a significant difference between dentogingival display during posed and spontaneous smile. In male participants, the mean tooth display at rest was 0.91 mm, mean dentogingival display at posed smile was 7.21 mm and at spontaneous smile was 9.02 mm. In female participants, the mean tooth display at rest was 1.26 mm, mean dentogingival display at posed smile was 7.39 mm and at spontaneous smile was 9.48 mm.

Conclusion: Within the limitations of this study, dentogingival display in spontaneous smiles is higher than in posed evaluations. Clinical evaluations and restorative thoughts should be planned according to the spontaneous smile, as the gingival appearance increases when patients are smiling naturally rather than posing. Video recordings provides more comprehensive information for assessment of dentogingival display.

An Evaluation of Partially Edentulous Patients Visiting Kantipur Dental College: A Hospital-Based Study

B Shrestha — 2023-12-31

Objective: To evaluate data with regards to the current prevalence of various Kennedy’s classes of edentulism and their association with age.

Material and Methods: A total of 157 patients were selected, and the prevalence of partial edentulism among the selected patient was recorded. Patients were grouped into three age groups. Kennedy’s classification was used to determine the pattern of partially edentulous arches. Data was analyzed using the Statistical Package for the Social Sciences version 20.0 for Windows.

Results: The results showed that the occurrence of Kennedy Class III partial edentulism was 44.9% in the maxillary arch and 67.4% in the mandibular arch, followed by Class II in both the maxillary and mandibular arch with an average of 15.9% in the maxillary arch and 4.9% in the mandibular arch. Based on these results, Kennedy’s Class III was the most prevalent partially edentulous pattern 57.8% among the maxillary and the mandibular arch.

Conclusions: Among selected patients, the prevalence of Class I and II was predominant among elderly population of > 50 years, whereas Class III was present among all ages.

Marginal Mandibulectomy Defect Rehabilitated with Cast Partial Denture: A Case Report

B Pathak — 2023-12-31

The primary prosthetic objectives for marginal mandibulectomy defects are to restore mastication, speech and appearance by replacement of teeth. With marginal resection of mandible followed by reconstruction with submental flap, the major prosthesis concern is related to soft tissue potential for support due to loss of vertical ridge height, loss of vestibular depth, mobility and displaceability of the flap that frequently unseats the prosthesis. This article describes prosthetic rehabilitation with a cast partial denture for missing teeth and restoring function for a patient who had undergone wide lesion excision of verrucous carcinoma with marginal mandibulectomy.

Cu sil Denture for Rehabilitation of Ectodermal Dysplasia

S Maharjan — 2023-12-31

Ectodermal dysplasia (ED) is an inherited disorder of ectoderm that results in aberrant development of tissues of ectodermal origin, namely skin, hair, nail, eccrine glands, and teeth. They present with missing teeth, sparse scalp hair, hyperpyrexia related to intolerance to heat.

Patients suffering from ED can lead normal life as it does not affect intelligence. But being bald and edentulous at any stage of life lowers the confidence of a person. Young children and adolescents go through the harsher scenario.

As this disorder manifests in infancy, prosthetic rehabilitation for missing and crooked teeth not only helps in, mastication, speech articulation, social acceptance and self-confidence.

This case report includes prosthetic rehabilitation of a 16-years-old male with ectodermal dysplasia with a complete denture on the lower arch and cu sil denture on the upper arch.

Management of Flabby Maxillary Anterior Ridge: A Case Report

SM Gurung — 2023-12-31

A flabby ridge occurs by replacing bone with connective fibrous tissues and is most commonly found in the anterior maxillary ridge. Flabby tissues present a challenging clinical scenario for the clinician. Making an accurate impression of these tissues is crucial for producing a prosthesis that fits well. In this case report, an open tray approach is used on a patient who has completely edentulous maxillary arch with flabby tissue in anterior region.

Porosity in the Final Denture-A heartbreak !

B Maskey — 2023-12-31

Porosities in the aftermath of a polymerization defect occurring in a complete denture are incidental in some cases with time constraints, though unintentional. Such defects harbor microbial colonization, compromise mechanical and aesthetic properties, and at times are even unserviceable to the patient. Remaking the denture right before insertion is disheartening in these instances, both for the patient and the attending clinician. This clinical report describes a rebasing technique that was undertaken to replace a fragile denture base.

Applications of the curve of Spee in Prosthodontics

A. Bhochhibhoya — 2023-12-31

No abstract available.