Accuracy of implant impression techniques

Evaluation of the accuracy of different transfer impression techniques for multiple implants

“…17,20,24 The transfers used in this study were tapered and square, united or not, according to the available literature. 11,[15][16][17]19,[20][21][22]26 According to some authors there is no perfect fit between the abutment and the implant. 9,10 However, large gaps can cause problems because they favor bacterial colonization increasing inflammation of the tissues surrounding the implants; 9 marginal fits of up to 100 µm are clinically acceptable, 9 and these problems may be closely linked to transfer impression techniques.…”

“…However, there are several parts that must be controlled when fastening is being performed, some rotational movement of the impression coping is required when securing the implant analog, and blind attachment of the implant analog to the impression coping are some disadvantages of this technique. [15][16][17][18][19][20][21][22][23][24][25] Branemark et al emphasized the importance of using impression copings that are splinted with dental floss scaffolding covered with autopolymerizing acrylic resin for transfer impression. 1 Nowadays, this same technique has been employed by others with minor modifications and has proven to be a secure impression procedure.…”

“…1 Nowadays, this same technique has been employed by others with minor modifications and has proven to be a secure impression procedure. 19,26 The accuracy of casts requires an appropriate selection of impression materials and trays. Studies have shown that elastomeric impression materials, especially silicone and polyether, are the most recommended for transfer impression procedures, due to their increased linear stability, lower residual shrinkage during storage, greater rigidity and lack of rotation resistance of the coping inside the impression leading to a more accurate cast.…”

Impression techniques for implant dentistry

“…Some advocate connecting the impression copings together intra orally prior to impression making with acrylic resin. 8 These studies indicate that there is not statistically significant improvement when splinting impression copings with acrylic, however, the deviation of these impressions from the standardised cast is smaller. Others advocate use of impression plaster to connect the impression copings.…”

Current methods and techniques of implant impressions: A literature review

“…Z kolei w warunkach klinicznych najważniejszą zmienną pozostaje wycisk i jego jakość. [19][20][21][22] …”