Accuracy of Impression Techniques for Implants. Part 1 – Influence of Transfer Copings Surface Abrasion

Abstract

Technique TA presented more accurate master casts than TRS and TAA techniques. The angulated implant (65 degrees ) tended to generate more imprecise master casts than implants perpendicular to the surface.

Current methods and techniques of implant impressions: A literature review

“…Najczęściej stosowanym materiałem służącym do blokowania implantów jest samopolimeryzująca żywica akrylowa do modelowania o minimalnym skurczu. 21,26,28,29,[35][36][37][38][39][40] Del'Acqua i wsp. 41 używali również kompozytowych żywic światłoutwardzalnych.…”

“…Dane z literatury wskazują na możliwość nakładania materiału do blokowania bezpośrednio na rusztowanie z nici dentystycznej przewiązanej pomię-dzy transferami. 21,28,29,[36][37][38][39]42,43 Innym sposobem blokowania jest wytworzenie wcześniej spolimeryzowanej poprzeczki z żywicy akrylowej. 26,27,32,36,[44][45][46] lub z żywicy kompozycyjnej 41 i zamocowanie jej do transferów małą ilością świeżej żywicy.…”

Analysing the precision of dental impression on angulated implants using full arch and sectional approaches in the abutment and fixture levels

“…In these studies the number of the implants were 4 and 5 respectively. (2,8) Moreover, two other studies also showed that by using 2 or 3 angulated implants, the precision of the impression does not change that much. (4) At the clinics, we could come acrossconditions which, the implants that are located on each sides of the arch are placed with greater angle in accordance to each other.…”

“…(1,2) After installing the fixtures, the need for a precise dental impression is required. Obviouslyconducting such impressions and the preparation of prostheticsareboth one of the most important clinical stages.…”

“…There are several ways to conduct dental impressions for implants in which some are more precise than the others. (1) Precision in the prepared impression depends on many different factors (2) including the component of the impression (1,3) , the angle of the implants (4) , type and number (1) , depth of the implants (5) , the using tray (6) and different levels of impression. (7) Many studies have examined the effect of the angle of the implant on the precision of the impression.…”