Introduction: Missed teeth are replaced to provide the patients with occlusal stability. Partial removable prosthodontics are still in use among the various applications in this field. Adequate retention is essential for its function. Circumferential clasps are used and the main goal of this study is to assess the importance of the geometry of the retentive arm and its effects on the quality of retention produced. Materials and Methods: Three-dimensional finite element method of analysis was selected to find answer to the questions. Three models were designed with the retentive arms of same lengths and different angular coverages (α is explained in text). 0.01″ to 0.03″ of displacements were applied and the forces derived. Results: Different amounts of retentive forces were produced, which were assessed in two directions. Conclusion: The greater the curve of a retentive arm, the greater the retention force produced, assuming that the length of retentive arm remains constant.

Problem: Selection of appropriately sized maxillary anterior teeth is one of the difficult aspects of esthetics in complete denture prosthodontics. Many attempts have been made to establish methods for estimating the combined width of maxillary anterior teeth and central incisors using anatomical landmarks, but depending on a single method for this purpose is not advisable in such a crucial esthetic stage. This study attempts to provide a guideline along with other methods for determining this relationship. Purpose: The purpose of the study was to determine whether a relationship exists between the intercanthal dimension and four mesiodistal width combination of the maxillary anterior teeth. Setting and Design: This study has a cross-sectional design. The work was performed in a dental college and hospital. Statistical Analysis Used: Pearson correlation coefficient with paired t test with a confidence interval level of 95%; this is determined on the basis of the sample size. Materials and Methods: Maxillary anterior teeth of 210 patients were examined. The intercanthal distance was measured between the median angels of the palpebral fissure. The mean widths of two central incisors, combined width of the four incisors and combined width of six anterior teeth were intraorally determined at their widest dimensions. Statistical analysis was performed to determine the relationship between the intercanthal distance and the four measurements of maxillary anterior teeth. Results: After the statistical analysis, it was found that biometric ratios of 1: 0.271 and 1: 1.428 could be used to estimate the central incisor width and the combined widths of the six anterior teeth, respectively. Conclusion: Within the limitation of this study, the intercanthal distance can be used as a preliminary method for determining the width of the maxillary anterior teeth during the initial selection of the teeth for an edentulous patient.

Aims: The study tries to elucidate the contributing factors responsible for cases of denture impaction with regard to the events preceding the impaction, types of denture responsible for impaction, duration of the use of denture, age and sex distribution, presenting signs, symptoms, diagnosis and complications with an idea of providing an ENT perspective of the problem, thereby underlining the need for preventive measures and doctor/patient education. Based on the results, a few suggestions are made to serve these purposes. Settings: A tertiary hospital of a developing country. Study Design: A retrospective chart review. Materials and Methods: A retrospective analysis of 106 cases of denture impaction presenting to the Otorhinolaryngology Department over a period of 5 years (September 2000 to September 2005). Statistical Analysis Used: The statistical package for social sciences (SPSS) 10.0 windows compatible program. Results and Conclusion: Denture impaction was most prevalent in elderly persons (>50 years) using dentures for more than 5 years. The upper single tooth and double teeth nonhooked acrylic dentures were the most common types of denture responsible for impaction. The most common preceding event was the wrong manner of drinking water. The most common location of impaction was in lower one-third of the esophagus with rigid esophagoscopy being a fairly safe technique for management. The rate of complications was directly proportional to the duration of presentation. The current modalities of the localization of impacted denture were largely ineffective or high costs were involved for the routine use of radio-opaque materials and the alternative coloring of the denture. Hence, education of the doctor and patient regarding the availability of such materials and proper use of dentures should be given paramount importance.

Aim: The marginal microleakage of recently used non-eugenol temporary cements is not well documented. Purpose: To evaluate the marginal microleakage of three zinc-oxide-based non-eugenol temporary luting agents using temporary crowns on prepared natural teeth. Materials and Methods: Freshly extracted 90 maxillary premolars of approximately similar crown height (7.8 mm-8.3 mm) were embedded in cold-cure resin blocks. Standard tooth reduction for ceramometal restorations with shoulder margin was planned using a customized handpiece-holding jig. Temporary crowns were prepared using the putty index technique following the tooth preparation. Specimens ware randomly divided into three groups of 30 each and temporary crowns were cemented using TempoSIL (Coltene/Whaledent AG), RelyXTempNE (3M ESPE AG), Freegenol (GC).The specimens were thermocycled for 250 times in the range of 5-60 degree with an interval of 10 s between two immersions. All the specimens were immersed in 5% basic fuschin and then embedded in cold cure resin and sectioned. The sectioned specimens were observed on the buccal and lingual side under optical microscope with an image analyzer for the evaluation of marginal microleakage. Results: Marginal microleakage was highly significant in all the three cements and occurred between the tooth surface and the cement layer and not between the cement layer and the restoration. Conclusion: Minimum marginal microleakage was obtained with the application of Templute. RelyXTempNE had the highest marginal microleakage and Freegenol showed intermediate values.

Tooth preparation in fixed prosthodontics represents the equilibrium between the conservation of the tooth structure and pulp health, whilst achieving an esthetic and strong crown. A well planned approach coupled with the understanding of pertinent theories underlying each step is critical for a successful tooth preparation. The reduction of the tooth structure must be preceded by a mental image of the design of the artificial crown and the anticipated occlusion. This paper discusses certain important clinical tips in the procedures used for full veneer tooth preparation.

Rotational path of placement has been introduced to dentistry since long but do not have adequate popularity because of different factors, which are discussed in this article. A comprehensive MEDLINE search from 1935-2006 with the key words of "rotational path" and "dual path" were supplemented with hand search to identify relevant peer- reviewed English articles published in dental journals. In order to fabricate a prosthesis with rotational path of insertion we should not only know the definition, advantages and disadvantages but also its problems and the approaches to overcome them.

A patient who undergoes/has undergone maxillofacial surgery is already under enormous apprehension and fear. Postoperative physical and mental stress because of depression, shock, anger and ostracisation add to functional and esthetic impairments and all these make the sufferer prone to malnourishment. An approach that involves simple nutritional principles preceding the surgery, continuing postoperatively and proceeding life long will translate into improved prosthodontic prognosis. We have attempted to apply these principles to solve the common nutritional problems affecting maxillofacial prosthetic patients, keeping in focus the diet and economics of a normal Indian patient.

Cranial defects occur most frequently during wartime, but their incidence during peace time, as a result of accident or disease, makes knowledge of cranioplasty useful to the interested practitioner. Trauma accounts for most of the cranial defects. Numerous materials have been historically employed for the restoration of cranial defects. Heat-polymerized methyl methacrylate alloplastic cranial implant requires presurgical fabrication of the implants. It facilitates the reproduction of the contours, and the tissue bed is not exposed to the heat of polymerization or to the free monomer. In this study, a case report has been presented in which heat-cured acrylic resin alloplastic implant has been fabricated for a patient with left frontal bone defect.

The reconstruction of an extremely worn dentition is difficult and represents a challenge due to the minimal tooth structure that remains. These patients often exhibit the loss of the vertical dimension of occlusion and esthetic problems. Moreover, the problems associated with the maxillary complete denture opposing the natural teeth have to be taken into consideration. Occlusal problems and fracture of the denture bases account for most of these structural difficulties. These may result from the occlusal stresses on the denture and underlying tissues from the opposing teeth and musculature, the position of mandibular teeth and flexure of the denture bases. The current article describes the prosthodontic rehabilitation of a patient who reported with a completely edentulous maxillary arch and mandibular teeth with an uneven occlusal plane. Following a thorough examination, a glass-fiber-reinforced maxillary complete denture and a mandibular removable overlay occlusal splint was planned.

For the successful outcome of implant rehabilitation, a functional prosthesis is as significant as an uneventful surgery. A variety of abutment designs are available for the restoration of a single tooth implant. These variations are an outcome of the requirement for the better orientation of the implant to the occlusal plane and to adjust the abutment according to the given implant position and angulation. Varied clinical situations may preclude traditional abutments and require special or customized abutments. Moreover, there is a requirement to develop an alternative to resolve the frequent problem of screw loosening observed in the screw-retained abutments. This paper discusses a new and easy approach for the fabrication of a cemented custom-made cast post-and-core abutment to be used with all types of implant systems.