Australasian Dentist Issue 89

Category 76 AustrAlAsiAn Dentist Wilcoxon signed rank test with Bonferroni correction comparing the decrease of viral load over time: t1 vs t2, t1 vs t3 and t1 vs day 7 (i.e., secondary endpoint) in both groups. then the two groups were compared at each time thanks to a non- parametric Mann-Whitney u test. Finally, a mixed effect linear model (viral load repeated data along time from day 1 t1 to day 7) was performed with group (CDCM/ placebo) as fixed effect and individuals as random effect. All analyses were reperformed on the datasets with t1 values starting at the first quartile (Q1), the second quartile (Q2) and the third quartile (Q3). no correction of p-values was made for multiple tests. except for the Mann-Whitney test, the other tests were based on the unilateral hypothesis (H1: CDCM < placebo). the statistical methods are indicated in the table footnotes. All analyses other than sample-size calculations and graphic illustrations were performed using r (version 3.6.0, the r Foundation for statistical Computing Platform). this article analyzed the first outcomes of the protocol registered at Clinicaltrials.gov (nCt04349592). u To read the full article click on the link: https://www.researchsquare.com/article/ rs-315468/v1 4.5, Department of Biomathematics, university of texas M.D. Anderson Cancer Center, Houston, texas, usA). the sample size was based on a minimal viral load difference of 1 log10 copies/ml between control and experimental groups, a common standard deviation of 2 log10 copies/ml, a power of 0·9 and a type i error of 5%. it was calculated at least 70 subjects per group. With an estimated drop-out rate of 25%, 88 subjects per group were required (unilateral test). the primary efficacy analysis was performed on an intention-to-treat (itt) basis with all randomly assigned patients. in the whole sample at day 1, we have performed a paired nonparametric provisional veneers. Microbrushes on buccal margins and small interdental brushes (eg #000 Piksters) are used to remove excess resin prior to light curing. this method can save clinical time and provide the patient with cleansable and aesthetic provisional veneers for the duration of the provisional phase. u Visit www.creedce.com t wo common complications which occur during provisionalisation for porcelain veneers are fracture of the provisional veneers when attempting to remove the veneers during the setting phase of the material, and fracture or loss of provisional veneers during function. the split-Key technique, developed by Dr Alan Yap, can be used to minimise the occurrence of these complications. A putty key is sectioned into labial and Palatal segments (Fig 1). With the palatal segment in-vivo, soft wax is applied interproximally from the buccal aspect to block palatal undercuts. More soft wax is applied at the midline (Fig 2). A thin smear of vaseline is applied to tooth surfaces. the labial segment is filled with Bis-Acryl prior to placement in-vivo. After the full setting time the provisioanal veneers are carefully removed with a sickle scaler. the splinted veneers should fracture at the midline during removal (Fig 3). the provisional veneers are trimmed and glazed, tooth surfaces are cleaned, and spot etching is carried out on the mid-buccal surface of each tooth. A minimal amount of flowable composite is used to cement the splinted The split-key technique for fabricating provisional veneers By Dr Alan Yap, prosthodontist Dr Alan Yap is the convenor of Porcelain Veneers, Implant Prosthodontics 1 and Implant Prosthodontics 2, marquee courses by CREED CE. Figure 1 Figure 2 Figure 3 Figure 4 lInICal