The PES reproducibly evaluates peri-implant soft tissue around single-tooth implants. Thus, an objective outcome of different surgical or prosthodontic protocols can be assessed. Orthodontists were clearly more critical than the other observers.

PurposeRehabilitation of the incomplete dentition by means of osseointegrated dental implants represents a highly predictable and widespread therapy; however, little is known about potential risk factors that may impair long-term implant success.MethodsFrom 2004 to 2012, a total of 13,147 implants were placed in 4,316 patients at the Academy for Oral Implantology in Vienna. The survival rates after 8 years of follow-up were computed using the Kaplan-Meier method, and the impact of patient- and implant-related risk factors was assessed.ResultsOverall implant survival was 97% and was not associated with implant length (P=0.930), implant diameter (P=0.704), jaw location (P=0.545), implant position (P=0.450), local bone quality (P=0.398), previous bone augmentation surgery (P=0.617), or patient-related factors including osteoporosis (P=0.661), age (P=0.575), or diabetes mellitus (P=0.928). However, smoking increased the risk of implant failure by 3 folds (P<0.001) and a positive history of periodontal disease doubled the failure risk (P=0.001).ConclusionsSumming up the long-term results of well over 10,000 implants at the Academy for Oral Implantology in Vienna it can be concluded that there is only a limited number of patients that do not qualify for implant therapy and may thus not benefit from improved quality of life associated with fixed implant-retained prostheses.Graphical Abstract

Positional inaccuracy is low in guided implant surgery, but may however significantly compromise implant esthetics in the anterior maxilla.

One third of all biopsies adjacent to crowns of unerupted teeth had significant lesions. Over a 6 year period, 2646 pericoronal lesions were biopsied when impacted teeth were removed from patients aged 18-89 yrs. Over 90% were from third molars, and most of the others were from canines. The biopsies constituted 7.6% of all oral biopsies sent to a US university laboratory. Most reports (67%) were of follicular tissue. Lesions diagnosed were: dentigerous cyst (28%), dentigerous cyst with mucous cell prosoplasia (3%), odontogenic keratocyst (2.7%), odontoma (0.7%), ameloblastoma (0.5%), calcifying odontogenic cyst (0.23%), carcinoma (0.23) and odontogenic myxoma (0.04%). From the 5th decade onwards, about half the biopsies were of pathological lesions. Dentigerous cyst was the commonest lesion up to age 70, but other lesions were more frequent later. A following critical discussion states that the findings justify histopatho-logical examination of perifollicular tissue from all impacted teeth removed after age 30. Five years of aftercare of implant-retained mandibular overdentures and conventional dentures Visser A, Geertman ME et al. J Oral Rehabil 2002; 29: 113-120 Endosseous implants were substantially better than the transmandibular implant system. In 2 centres in the Netherlands, 222 patients (6% had dropped out) were followed up after 6 categories of complete prosthodontic treatment for severely resorbed mandibular ridges. Most of the patients were also evaluated on a 5 point scale for comparing implants. During 5 years' follow-up, in patients with mandibles of 8-15 mm height, implant loss was 5% for 57 overdentures on 2 endosseous implants, and 29% for 27 with transmandibular implants and overdenture, while implant insertion was postponed for 30% of those with conventional dentures: these patients could opt for implants after 1 year. In patients with mandibles of 16-25 mm height, implant loss was 17% for 30 overdentures on 2 endosseous implants, while in 11% of 27 who received vestibuloplasty and complete denture and I M P L A N T P R O S T Failure was about 10%, and most occurred within 2 years, with a surprising trend towards greater mandibular loss. This study followed 97% of a group of 76 implants (59 maxillary) in 71 patients for 4-10 yrs (mean 5.5). This is a lower drop-out rate than in other studies. Eleven implants were inserted immediately after extraction, 17 were delayed to 6-8 weeks post-extraction and 48 were placed in normal edentulous ridge tissues. Guided bone regeneration was added to 14 implant insertions and hydroxyapatite augmentation to 5, and both these adjuncts were used in one case. Kaplan-Meier survival probabilities were 96% for the maxilla and 80% for the mandible after 120 months (NS). Five implants were lost, 4 within 2 years. With 12 implants, abutment screws loosened during the study, but this was resolved in 5 where a electronic torque controller was applied at 32 Ncm. Mean peri-implant bone loss was 1.8 mm in the maxilla and 1.3 mm in the mandible, and 15 implants showed more...

Copy-Abutments for immediate restoration of implants in the esthetic zone show satisfactory long-term esthetic outcomes.