Words: 4,371 Pages: 20 Data relating to errors and faults, including defects in material For fabrication of implant‐supported crowns and FDPs, digital impression systems also result in clinically acceptable fit. Based on the particular condition, dentist needs to select material and technique of impression for success of complete denture therapy.5 Impression making is still widely IMPRESSION TECHNIQUES OF FPD - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Dual arch – laminar impression technique A pre-operative impression is made. Impression technique should be selected on the basis of biologic factor dictated by the anatomy and the physiology of the mouth dictated by the orofacial tissues. The impression technique and material used, tray type, and number of prepared units were recorded for each impression. Home; Front Office; 7 tips for taking accurate impressions. Digital impression techniques are faster and can shorten the operation time. Impression making is an essential step in fabrication of complete dentures.4 Success of complete dentures largely depends on accuracy of impression. 3M ESPE offers tips to avoid costly and time-consuming remakes or adjustments. Ahlholm et al Digital vs. Two holes are drilled from the buccal surface and one on the mesial and one of the distal. Anecdotal evidence suggests that impression materials and techniques used in general dental practice for fixed partial dentures vary from those taught in dental schools. Digital impression techniques are a clinically acceptable alternative to conventional impression methods in fabrication of crowns and short FDPs. A recent study from the National Practice-Based Research Network reported that most dentists use either a single-cord (35%) or double-cord (35%) retraction technique, while a smaller percentage of dentists (16%) prefer an injectable retraction paste. 3 Another possible cause of this problem is insufficient flow of the impression material. MATERIALS AND METHODS: A total of 193 FPD impressions were evaluated, immediately after arrival at 11 dental laboratories, by 3 calibrated examiners. Conventional Impressions in Fixed Prosthodontics Table 1 Precision of crowns fabricated by using digital and conventional impression techniques Author Study type Experimental group N Marginal gap (mean/median) (µm) Internal fit (µm)Anadioti et al, 20156 In vitro PVS impression/IPS e.max Press crowns 15 40 PVS impression/e.max CAD crowns 76 The post operative impression of the tooth to be prepared is relieved to a depth of 0.5mm in the cervical area. Objective . 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