The preformed metal crowns (PMCs) are prefabricated constructions, used for restoring a severely broken teeth, affected by multisurfice carious lesions.The aim of the current study is to analyze and criticize the contemporary scientific conclusions related to indications, the usage methods, the advantages and disadvantages of the PMCs, used in the treatment protocol in pediatric dentistry.The subject of the analysis is 64 english language papers, published in the period from 1966 to 2017 y.The analysis shows that disadvantages of these restorations are related to the esthetics and previous preparation of the hard tooth tissues. The numerous advantages are related to the mechanical durability; the successful tightness concerning the non-operative sealing of caries and the prophylactic effect related to secondary caries lesion as well as the orthodontic jaw malformations, justify the usage of the PMCs in pediatric dentistry and also explain the need of scientific, clinical research in this domain.

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Dental anxiety and negative behavior are common problems in children. The aim of this study is to evaluate the connection between a child's behaviour in the dental office and premature tooth loss. Methods and materials: Subject of monitoring of the clinical research were 140 school children with mixed dentition. The clinical group consists of 90 children with prematurely extracted teeth. The patients from the clinical group were divided into three groups of 30 patients. The control group consists of 50 children with intact denture. The child's behavior was assessed by the denti using a behavioral scale. А special evaluation form for behavior assessment about the level of negativism of the children was filled by the examining dentist. Frankl's rating scale was used. This scale consists of four stages and each defines specific behavior. Results: There were no definitely negative children in our study. The results show that most of the patients from the control group are positive towards the dental treatment -61.2% and only 14.3% are negative. About 35% of the children with prematurely extracted teeth are positive, most of them -61.3% are negative. Conclusion: Most of the children with prematurely extracted teeth are negative towards dental treatment due to which they are with poor dental health and early tooth loss. The use of behavioural techniques are recommended in order to improve their oral health and to reduce the number of premature extractions.

The premature extraction under general anesthesia differs significantly from the same manipulation made with local anesthesia. The aim of the study is to compare the number, the type and the position of the prematurely extracted deciduous teeth in children treated with local and under general anesthesia. Subjects of monitoring were 60 children. The clinical group consists of 30 children with teeth for premature extraction under general anesthesia and the control group consists of 30 with children for premature extraction under local anesthesia. The dental status was examined and registered by the DMFT. The number and type of these teeth were calculated and registered in special cards. Results: The children from the first group had a greater average number of prematurely extracted teeth per child 3,22 ± 0,28 and for the children from the second group that number is 1,03 ± 0,07. The children from the first group have 23 premature extracted anterior teeth. For the first group of children -55 second temporary molars were prematurely extracted, in the second group -25 teeth. A greater number of deciduous teeth in the lower jaw in the two studied groups of children were prematurely extracted -49 teeth in the first group and 43 teeth for the second group. Conclusion: These results demonstrate the connection between the carious activity, premature tooth loss and the need of prevention of younger children, especially with ECC, where the upper incisors are strongly damaged at a very young age.