Conclusions : The probability for success for EMS proved to be significantly greater than the probability for success for RES , providing best available evidence on the influence of cavity preparation with ultrasonic tips and /or SuperEBA ( Keystone Industries , Gibbstown , NJ ) , IRM ( Dentsply Sirona , York , PA ) , MTA , or silicate cements as root‐end filling material instead of a shallow cavity preparation and placement of a resin‐based material .
HIGHLIGHTSEndodontic microsurgery ( EMS ) with the use of high‐magnification ultrasonic root‐end preparation and root‐end filling with SuperEBA , IRM , MTA , or other calcium silicate cements has a high probability of success .
Resin‐based endodontic surgery with the use of high‐magnification preparation of a shallow concave root‐end cavity with bonded resin‐based root‐end filling material performed less favorably than EMS
Introduction : The aim of the present study was to investigate the influence of root‐end preparation and filling material on endodontic surgery outcome .
Quasi-likelihood estimation for relative risk regression models.
For a prospect i ve r and omized clinical trial with two groups , the relative risk can be used as a measure of treatment effect and is directly interpretable as the ratio of success probabilities in the new treatment group versus the placebo group . For a prospect i ve study with many covariates and a binary outcome ( success or failure ) , relative risk regression may be of interest . If we model the log of the success probability as a linear function of covariates , the regression coefficients are log-relative risks . However , using such a log-linear model with a Bernoulli likelihood can lead to convergence problems in the Newton-Raphson algorithm . This is likely to occur when the success probabilities are close to one . A constrained likelihood method proposed by Wacholder ( 1986 , American Journal of Epidemiology 123 , 174 - 184 ) , also has convergence problems . We propose a quasi-likelihood method of moments technique in which we naively assume the Bernoulli outcome is Poisson , with the mean ( success probability ) following a log-linear model . We use the Poisson maximum likelihood equations to estimate the regression coefficients without constraints . Using method of moment ideas , one can show that the estimates using the Poisson likelihood will be consistent and asymptotically normal . We apply these methods to a double-blinded r and omized trial in primary biliary cirrhosis of the liver ( Markus et al. , 1989 , New Engl and Journal of Medicine 320 , 1709 - 1713 )
Conclusions : The probability for success for EMS proved to be significantly greater than the probability for success for RES , providing best available evidence on the influence of cavity preparation with ultrasonic tips and /or SuperEBA ( Keystone Industries , Gibbstown , NJ ) , IRM ( Dentsply Sirona , York , PA ) , MTA , or silicate cements as root‐end filling material instead of a shallow cavity preparation and placement of a resin‐based material .
HIGHLIGHTSEndodontic microsurgery ( EMS ) with the use of high‐magnification ultrasonic root‐end preparation and root‐end filling with SuperEBA , IRM , MTA , or other calcium silicate cements has a high probability of success .
Resin‐based endodontic surgery with the use of high‐magnification preparation of a shallow concave root‐end cavity with bonded resin‐based root‐end filling material performed less favorably than EMS
Introduction : The aim of the present study was to investigate the influence of root‐end preparation and filling material on endodontic surgery outcome .