[doi:10.1063/1.3647759]“
“A NaPSS-b-PS was prepared via a two-stage stable free-radical polymerization using a mixture of ethylene glycol and

water as the medium. Styrene emulsion polymerization was conducted using a mixture of NaPSS-b-PS and SDS. Results showed that there is little aggregation among particles. Two other NaPSSs with different sulfonation fractions were also compared. Comparisons were made using relationships, such as $ \overline n $ versus Dv, chain growing time versus SDS content, and Dv versus SDS content. Characteristic behaviors of various NaPSSs on entry were revealed. C59 research buy (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012″
“Purpose: The purpose of this study was to determine whether there is a consensus among oral and maxillofacial surgeons and orthodontists as to the definition of centric relation.

Materials and Methods: A survey constructed from 5 definitions of centric relation as provided from the “”Glossary of Prosthodontic see more Terms”" was sent to the chairpersons of every oral and maxillofacial surgery and orthodontic program in the United States. Only full-time faculty members

from each program were asked to respond to the survey. The different responses were analyzed statistically by chi(2) analysis and examined by use of 95% confidence intervals.

Results: We received 73 responses from the oral and maxillofacial surgeons and 64 from the orthodontists. There were 69 different programs represented in this survey. Orthodontists and surgeons had a significantly different

response regarding the definition of centric relation (chi(2) = 28, df = 4, P < .0001). There was no difference between the 2 groups on the need for mounting models in centric relation for use in orthognathic surgery (chi(2) = 1, P > .6). Regarding the definition of centric occlusion, there was a significant difference between AZD6094 concentration orthodontists and surgeons (chi(2) = 9.9, df = 1, P = .0070). The fourth and fifth questions had to do with centric relation/centric occlusion slide and the direction of movement. There was a significant difference between the 2 groups regarding mandibular movement (chi(2) = 28, df = 2, P < .0001). Surgeons were nearly unanimous in their opinion that the mandible would move anteriorly (88%), whereas there was more discordance among orthodontists. Within the orthodontic group, 50% indicated anterior movement and 47% indicated that either an anterior or posterior movement could occur. The surgeons were asked I additional question that the orthodontists were not. Forty-nine percent of the surgeons indicated that during a bilateral sagittal split osteotomy, the proximal segment should be seated vertically and posteriorly before rigid fixation.

Conclusions: The results of this study show that there is a statistical lack of consistency among practitioners regarding an absolute definition of centric relation as it relates to orthognathic surgery.