ABSTRACT
Failure of eruption of primary teeth can be considered rare especially in maxillary anterior teeth. The problem can be either mechanical obstruction of eruption or a failure of the eruption mechanism. This case report presents failure of eruption of the maxillary right deciduous central incisor in a four year old girl. The unerupted primary tooth was removed surgically. The histological finding revealed fibroma with reactive giant cells. Periodic follow up visits were advised to monitor the developing dentition and to ensure enough space for the permanent incisor
ABSTRACT
To investigate the effect of 9 cheeses with different compositions on the extent of demineralisation/ remineralisation of enamel slabs in situ. Sucrose and sorbitol solutions were used as controls. Ten subjects were required to wear removable appliances with human enamel slabs cut from white spot lesions created in vitro. The subjects were required to wear their appliances, for two days to allow plaque to grow. Over the following 5 days, they were asked to immerse their appliances 4 times per day for 10 minutes each time in a suspension of the test cheese or control solution. De- or remineralisation was then measured using a combination of microradiography and an image analysis system. The results for lesion depth [ micro m] tested by paired t-test revealed significant net remineralisation [p<0.05] with two types of cheeses. As for mineral loss or gain [vol.% micro m], significant net remineralisation was seen with 6 types of cheeses. Some cheeses can cause remineralisation of early lesions
Subject(s)
Humans , Male , Female , Cariostatic Agents , Calcification, Physiologic , Dental Enamel , Double-Blind Method , MicroradiographyABSTRACT
To determine the prevalence and degree of severity of hypodontia and oligodontia in a sample of orthodontic and pediatric dentistry patients at Prince Hashem Ben Al-Hussein Military Hospital. A total of 1524 patients [847 females and 677 males] were studied with regard to the prevalence of congenitally missing teeth. Diagnostic records and panoramic radiographs were examined for any missing permanent teeth excluding third molars. Hypodontia occurred in 67 subjects [4.4%]. The missing teeth were observed in 28 males and 39 females. There were no statistically significant differences between both sexes. The most frequently missing teeth were maxillary lateral incisors [61.2%], mandibular second premolars [28.4%], mandibular central incisors [26.9%] and upper second premolars [10.4%] respectively. Of the patients with hypodontia, 52 subjects [77.6%] lacked one or two teeth. Fifteen subjects [22.4%] lacked three or more teeth. Fifty four subjects [80.6%] had hypodontia involving anterior teeth, while 22 subjects [32.8%] lacked posterior teeth and 11 subjects [16.4%] had two or more teeth missing in the same quadrant. Oligodontia was found in four patients [0.3%]. The result of this study revealed that the prevalence of hypodontia was 4.4% and of oligodontia was 0.3%. The findings implicate the need for a thorough clinical and radiographic assessment of all patients prior to extraction of either deciduous or permanent teeth, and reiterate for early diagnosis and orthodontic treatment if needed