[Assessment of the relation between clinical phases of dental eruption and skeletal maturity stages using cervical vertebrae method]

Timing is an important factor in orthodontic treatment planning. Skeletal age is a standard indicator for determining optimum time for treatment. On the other hand, in clinic the phases of the dentition [deciduous, early and late mixed, permanent] have often been used for treatment timing, investigations of the different outcomes of treatment protocols at earlier vs later stages of development. Considering the importance of this issue and to evaluate it in the Iranian adolescents, the purpose of this study was to evaluate the relation between clinical phases of dental eruption and the skeletal maturity stages by cervical vertebrae method [CVM]. Panoramic radiographs and lateral cephalograms of 100 boys and 100 girls were used. For determination of the Phases of dentition, Vander Linden method and for the skeletal maturity, CVM were used. The relationship between the skeletal maturity [stages in CVM] and the phases of the dentition was evaluated statistically by means of indicators of diagnostic tests and spearman's rho analysis. Spearman's rho analysis indicated a relatively strong correlation of 0.775 [P<0.001]; The early mixed dentition phase was a valid indicator of prepubertal stage [CS1], but the late mixed and early permanent dentitions were not valid indicators for the diagnosis of the onset of the pubertal growth spurt [CS3]. In comparison with a reliable indicator of skeletal maturity [CVM], the dentition phases perform poorly in the detection of the onset of the pubertal spurt in skeletal growth.

Evaluating stability changes of tapered roughened surface implants in different bone types: a prospective clinical cohort study

Implant stability of different designs have shown to be variable. The aim of this study was to evaluate the stability changes as a reflection of early healing around roughened-surface implants in human using resonance frequency analysis [RFA]. 153 Branemark Replace tapered Ti-unite[tm] implants in 68 patients were placed in the maxilla or mandible. Bone type was classified into one of 4 groups according to Lekholm and Zarb index. RFA was used for direct implant stability measurement on the day of implant placement and at 14, 30 and 60 days after placement. No early failure occurred. The lowest primary stability measurement was observed in type 4 bone. Student t-test for comparison of bone groups at each time point revealed no significant difference between implant stability in all bone types [P > 0.05]. In testing the effect of implant length and diameter with time using the mixed model ANOVA according to implant length, there was not any significant difference between groups [P > 0.05]; however, implant diameter showed a significant effect on implant stability. There were no significant differences in implant stability between genders [P > 0.05], According to the results, pattern of stability changes are not different among different bone type

Comparison of pulpotomy with formocresol and MTA in primary molars: a systematic review and metaanalysis

There are various studies looking at the effects of formocresol [FC] and mineral trioxide aggregate [MTA] on pulpotomy of primary molars. This is a systematic review of literature comparing the success rates of MTA and FC in pulpotomy of primary molars. The study list was obtained using PubMed, EMBASE, Scopus, Science Citation Index, Iran Medex, Google Scholar, the Cochrane Library, and also some hand searches contains through dental journals approved by the Iranian Ministry of Health. Papers which met the inclusion were accepted. The quality of studies for the meta-analysis was assessed by a series of validity criteria according to Jadad's scale. Eight qualified studies met the criteria. Terms of clinical outcomes and radiographic findings were evaluated in all studies to assess clinical success and root resorption. Fixed model was applied to aggregate the data of homogenous studies. A random effect model was carried out for measuring the effect size of heterogeneous studies. The overall clinical and radiographic success rates based on the data suggested that MTA was superior to FC [P=0.004] with the Odds Ratio=3.535 and 95% confidence interval [1.494-8.369]. Primary molars pulpotomy with MTA have better clinical and radiographic success rates than FC