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Premature loss of temporary teeth, both the lateral and the frontal area can have unfavorable consequences on the development of permanent dentition, the support serving to maintain space for permanent teeth eruption in the dental arches. The aim of the study was assessment of different types of fixed and removable space maintainers in terms of their longevity in the dental arches that were applied as interceptive orthodontic treatment for edentulous space management transiently due to premature loss of deciduous teeth. The study followed the evolution of space maintainers properly applied to clinical cases that required these therapeutic options, and appreciated the success rate and the failure of these devices, important being the time at which the assessments were made. Findings failure rate of applied space maintainers was reported to the main causes that could lead to remove the devices: loss of space maintainers, especially those removable, fracturing both fixed and removable devices, loosening orthodontic rings and of course, taking into account the absence of some subjects at periodic reassessment meetings. The space maintainer was considered a success when it fulfill the main role for which it was applied - transitional management of edentulous space, and then being removed when the permanent succession tooth eruption occurred.

Bridges from composites reinforced with glass fibres are options for treating the absence of a single tooth, as a temporary but aesthetic solution for both anterior and lateral dental arch. This study aimed to determine clinical and mechanical properties of dental bridges using everStick C&B (GC) and Construct (Kerr) associated with GC Essentia Composite (GC Corporation, Japan) applied on four samples. The tests were done with the help of Universal Testing Machine, data recorded by a computer, and the evaluation of flexural strength and fatigue resistance revealed in specific diagrams. The fatigue resistance for bridges with FRC tested shown in diagrams, the force variations and the values of resistance in some points of each bridge. The tests demonstrate the possibility to increase endurance of such dental bridges, because the flexural strength and fatigue resistance are significantly increased by the fibres reinforcement (p

The main connector is an important component of the removable partial denture, a component related to all other elements of the dentures. The group of patients was represented by fifteen patients were randomly divided into three groups, each group consisting of five patients groups are designated as A, B and C, specific for palatal plate metal, palatal acrylic plate and palatal bar. Completed questionnaires showed that all three types of connectors affected speech, 40% of patients said they had been affected the process of chewing, and regarding swallowing, only 26.7% of patients were affected. The result of this study shows that the main connector metal bar was the main connector jaw accepted while the acrylic resin plate was less acceptable than metal plate main maxillary connector. It confirmed also influence of main connector design on to the future patient acceptance of denture.

The application of questionnaires to assess the anxiety of patients provides a lot of information that can guide the dental physician in assessing the patient's behaviour prior to addressing specific treatments, but also to find new strategies in the management of dental anxiety behaviour. There is a great variety of self-reported dental anxiety assessments which can be applied, but the most used adult questionnaire is Corah's Dental Anxiety Scale. In this study were invited to participate a total of 153 patients, divided in 3 age groups for each gender, attending 2 private practice dental clinics in Iasi, Romania, over a period of 2 months. By statistical analysis were calculated the mean scores, standard deviations and error, and the confidence interval of mean for gender and age groups, and were obtained descriptive statistics. Scoring the 4 questions of Corah's scale, was significantly higher in females as congruent with other studies; however there was a difference, statistically insignificant between different age groups. Analysis of the data of this study revealed a significant association of anxiety with gender and age.

Currently, inside the oral cavity, the dental space maintainers are subjected to forces exerted on them when performing various functions; therefore, it is important to know how each of these mechanisms behave and respond to forces that are applied directly to them. The mechanical properties of the materials used in dentistry are defined by a set of characteristics representing the behaviour of their particular working conditions and it is qualitatively expressed by a number of parameters.The study aimed to determine the pressing force that can be taken by four 4 types of space maintainers frequently used in practice - fixed and removable, applied on four samples realized with human teeth extracted for orthodontic purposes. Static tests were carried out on a machine type short WDW-5 EC with a maximum force of 5 kN and a loading speed of 5 mm/min by a special testing machine, with an innovative appliance; data recording was automatically performed, using a computer with a special program that present the specific diagrams. Experimental determinations included the following aspects: to determine the maximum force that can be supported by each sample, and to observe the deformations. The values obtained indicate that the best option in terms of behavior under the conditions specified is the removable appliance, and the less functional version is the fixed space maintainer using brackets. According to tests conducted, the fracture strength was found to be more important for fixed space maintainers (band and loop, for example) so, in practice is using more frequent these types of space maintainers.