en ترمیمی Cosmetic and Restorative Dentistry پژوهشي Research <p> Aim: The purpose of this investigation was to examine the reasons for placement and replacement of resin-based composite (RBC) restorations and the relationship<br>between placed and replaced composite restorations by gender, type of cavity, tooth type and longevity of replaced ones.<br>Materials and Methods: The study included 1,500 subjects, 720 males and 780 females, aged 18 to 52 years old who attended a private practice. The clinical<br>examination involved calculation of the number of decayed (primary caries) and failed-restored teeth. In addition the relationship between placed and replaced<br>composite restorations and the following aspects was assessed: gender, cavity type and tooth type. The data were analyzed using the chi-square test.<br>Results: The total number of restorations placed were 1,940 1,202 of those (62%)were placed for first time while 738 (38%) were replaced. The main reasons for the<br>placement of new composite resin restorations were primary caries (60%), tooth discolouration (18%), tooth fracture (12%) and erosion (10%) while secondary caries was the most frequent reason for the replacement of resin composite restorations (48%), followed by discolouration (22%), loss of filling (22%) and fracture of filling (8%). A statistically significant difference was recorded between males and females regarding the composite restorations placed and replaced </p><hr><p></p><p> <strong>Source:</strong> Journal of Dental Research, Dental Clinics, Dental Prospects</p><p><a href="http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/268" target="_blank"><font color="#0000cc"> Full text</font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-522&slc_lang=en&sid=1 Nikolaos Andreas Chrysanthakopoulos 10031947532846002131 10031947532846002131 Yes