Based on the findings of this in vitro study, the 3M True Definition and Trios scanner demonstrated the highest accuracy. The Lava COS was found not suitable for taking implant impressions for a cross-arch bridge in the edentulous jaw.

No abstract

This study evaluated the clinical outcomes of immediately loaded maxillary anterior single implants placed in fresh extraction sockets. A patient cohort that was treated 1.5 years earlier was recalled, and 18 patients (6 men, 12 women) with 21 implants were included. Clinical photographs and periapical radiographs were taken at follow-up and baseline to determine the bone loss and change in esthetics. No marginal bone loss was detected at followup (mean bone level ± standard deviation = 0.32 ± 0.82 mm). Immediate implant placement and loading resulted in predictable clinical and esthetic outcomes, with soft and hard tissue levels remaining stable over time. (Int J Periodontics Restorative Dent 2015;35:715-723.

Devitalized teeth are often challenging to restore due to the lack of coronal support and retention. New CAD/CAM materials and intra-oral scanning devices offer new possibilities to restore non-vital teeth in a simple and minimally invasive manner. The aim of this study was to evaluate the success of monolithic endocrowns using a digital workflow. MethodsTwenty-three patients requiring restoration of devitalised molars or premolars were included in the study. The preparation was scanned using an intra-oral scanner (Cerec Bluecam, Dentsply-Sirona) and a monolithic restoration was made from a nanoparticle resin-based hybrid composite (#10 GC Cerasmart [CS], #10 Lava Ultimate [LU]) or a polymer infiltrated ceramic (#10 Vita Enamic [VE]). At time of placement, after 6 months, 1 year and 5 years of function, radiographs were taken to evaluate the marginal integrity of the restoration and clinical pictures were taken to assess the quality of the restoration using the USPHS criteria. ResultsAfter 5 years, the restorative success rate was 70.8%, the restorative survival 87.5% and the tooth survival 91.6%. Four chippings (2 LU, 2CS), 3 fractures (3 LU) and 2 debonding of the restorations (2 CS) occurred. Also, 2 teeth were extracted after 5 years follow-up (2 VE), because of secondary caries and a root fracture. The USPHS ratings were high, except for the colour match, which was rated the lowest at all time intervals. ConclusionsNanoceramic endocrowns, made using a full-digital workflow, have an acceptable survival rate after 5 years. However, the complication rate was high. Patient satisfaction was scored using the OHIP-14 questionnaire, which is composed of 14 questions representing the patients' functional limits, physical pain, psychological discomfort, physical limitations, psychological limitations, social limitations and disability with the restoration. The occurrence of problems was rated on a Likert's scale from 0 (never) to 4 (very frequent), with a maximal OHIP 14-score of 56 points. StatisticsStatistics were performed using SPSS v26 (IBM, Armonk, NY, USA). Chi-square test was used to evaluate the survival and complication rate between the materials at the different time-points. Mann-Whitney U-test was used to compare the USPHS score between the different materials. Wilcoxon Signed Rank test was used to compare the OHIP-score over time. The level of significance was set at p=0.05.

To evaluate the clinical outcomes of resin composite CAD/CAM restorations in a prospective cohort study, and to assess patient and operator satisfaction after restoration placement, 59 indirect resin composite were placed by supervised undergraduate students, of which 43 restorations were followed over a mean period of 28 months (14–44 months) and evaluated using USPHS criteria. Patient and operator satisfaction levels were assessed using a visual analogue scale (VAS) after restoration placement. A total of 37 patients and 47 restorations were included for further study. Four teeth were extracted—three due to extensive drug-induced secondary caries in the same patient, and one tooth due to large periapical periodontitis after 44 months of service. The overall survival rate was 91.4%, and success rate was 87.2%. Differences between baseline and endpoint scores were significant for marginal discoloration (p < 0.05) and adaptation (p < 0.001). Color match (p < 0.05) and surface texture (p < 0.001) differed significantly, affecting all restoration types. VAS scores for patient and operator satisfaction showed a significant rank correlation (p < 0.01), and pairwise comparison showed significant differences for mean overall patient and operator VAS scores (p < 0.001). Lava Ultimate CAD/CAM may be considered a suitable material for overlays and endocrown restorations when combined with IDS, air abrasion, and MDP-containing adhesive systems. Marginal disintegration may present in inlays and onlays over time.