Mh. Parker et al., COMPARISON OF OCCLUSAL CONTACTS IN MAXIMUM INTERCUSPATION FOR 2 IMPRESSION TECHNIQUES, The Journal of prosthetic dentistry, 78(3), 1997, pp. 255-259
Statement of problem. At the insertion of a fixed prosthesis, occlusal
interferences in maximum intercuspation are often present. Purpose. T
his study investigated and compared the accuracy of interocclusal rela
tionships in maximum intercuspation for mounted casts obtained from a
quadrant dual-arch impression technique and conventional full-arch imp
ression techniques. Material and methods. Comparisons were made betwee
n an intraoral interocclusal record and interocclusal records made on
mounted casts. Irreversible hydrocolloid, reversible hydrocolloid, pol
ysulfide, polyether, and polyvinyl siloxane were used for the full-arc
h impression technique. For the quadrant dual-arch impression techniqu
e, rigid polyvinyl siloxane and light-body polyvinyl siloxane injectio
n materials were used. Results. Statistical analysis revealed a statis
tically significant difference (p = 0.0017) in the median values among
treatment groups. All pairwise multiple comparison procedures (Studen
t-Newman-Keuls) indicated the average error of the quadrant dual-arch
records was significantly different from the average error of each gro
up of records produced with the full-arch techniques (p < 0.05). Compa
rison of the records of the full-arch impressions did not reveal any s
tatistically significant differences. The average error of tile full a
rch records was 72 +/- 33 mu m and the quadrant dual-arch average erro
r was 5 +/- 5 mu m. Conclusion. The quadrant dual-arch impression tech
nique produced mounted casts with significantly more accurate maximal
intercuspal relationships than mounted casts from full-arch impression
s.