Accuracy of Implant Impressions for Partially and Completely Edentulous Patients: A Systematic Review

Abstract

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Accuracy of 3 different impression techniques for internal connection angulated implants

“…3,11 The results of the present study showed that the direct splinted impression technique was more accurate than the nonsplinted technique when internal connection implants at an angulation of 25 degrees were involved. These findings are in agreement with several studies which reported the superiority of the splinted technique for internal connection implants.…”

“…These findings are in agreement with several studies which reported the superiority of the splinted technique for internal connection implants. [11][12][13][14][15][16][17] Moreover, regarding implant angulation, 3 in vitro investigations showed that the splinted technique was more accurate than the nonsplinted technique for making an impression of angulated implants. 5,7,16 Some authors, however, have found no significant differences in the accuracy of internal connection implant impressions with the splinted and nonsplinted techniques.…”

“…7,9 Different impression techniques have been developed to improve the accuracy of angled implant impressions and obtain a definitive cast that will ensure the passive fit of the prosthesis. 3,11 Previous studies have shown that no differences in impression accuracy of angled implants were found when direct (open tray) or indirect (closed tray) impression techniques were used. 8,10 Moreover, most clinicians have suggested that the direct technique with splinting of impression copings in internal connection implants provides greater accuracy than that of the nonsplinted technique.…”

Accuracy of Implant Casts Generated with Conventional and Digital Impressions—An In Vitro Study

“…A key element that dictates the passive adjustment of the prosthesis is the precision of the working model, which in turn depends directly on the precision of the impression technique [11]. Some of the possible causes of a non-passive adjustment of the prosthesis are excessive inclination and the depth of the implants [11], as well as the potential inaccuracies of current impression materials and techniques.…”

Reusability of Implant Impression Copings-an in Vitro Study to Evaluate the Accuracy of Implant Transfer

“…Studies suggest that open tray type of impression technique is more accurate when multiple implants are placed (completely edentulous situation) and closed tray technique is preferred when less number of implants are placed and single path of retrieval of impression is possible 8 . Currently square and conical form of impression copings are used in implant dentistry.…”