Implants in the severely resorbed mandibles: whether or not to augment? What is the clinician’s preference?

Contains fulltext : 96000.pdf (publisher's version ) (Open Access)INTRODUCTION: The aim of this study is to inventory in the Netherlands which therapy is the clinician's first choice when restoring the edentulous mandible. MATERIAL AND METHODS: A questionnaire was sent to all Dutch Oral and Maxillofacial surgeons. As part of this, the surgeons were invited to treat five virtual edentulous patients, differing only in mandibular residual height. RESULTS: In cases of a sufficient residual height of 15 mm, all surgeons were in favour to insert solely two implants to anchor an overdenture. In case of a residual height of 12 mm, 10% of the surgeons choose for an augmentation procedure. If a patient was presented with a mandibular height of 10 mm, already 40% of the OMF surgeons executed an augmentation procedure. Most (80%) surgeons prefer the (anterior) iliac crest as donor site. The choice of 'whether or not to augment' was not influenced by the surgeon's age; however, the hospital, where he was trained, did. Surgeons trained in Groningen were more in favour of installing short implants in mandibles with reduced vertical height. DISCUSSION: As the option overdenture supported on two interforaminal implants is reimbursed by the Dutch health assurance, this treatment modality is very popular in the Netherlands. From a point of costs and to minimize bypass comorbidity, surgeons should be more reluctant in executing augmentation procedures to restore the resorbed edentulous mandible as it is dated in literature that also in mandibles with a residual height of 10 mm or less, solely placing implants, thus without an augmentation procedure in advance, is a reliable treatment option

When looks are more important than character: (Re)organizing the mental lexicon

Contains fulltext : 105815.pdf (publisher's version ) (Open Access)Radboud Universiteit Nijmegen, 16 april 2013Promotores : Verhoeven, L.T.W., Schreuder, R.119 p

Syntactic and strategic forces in picture naming: gender retrieval in blocked priming experiments

Item does not contain fulltextOne of the core issues in research on the processing of grammatical gender in language production is whether it is represented as an abstract node or whether it is an inherent property of the noun. Interpretation of the relevant data is often complicated by the fact that they could theoretically concern either gender competition or determiner competition. In the present Study, participants named Pictures in pre-defined sets, using gender-marked demonstrative determiners. We independently varied the number of determiners and the number of gender classes in a given set. There were clear effects of the number of determiners (response set size). Evidence for effects of gender was less conclusive. Time course analyses revealed that a potential effect of gender is very subtle and highly Susceptible to strategies that participants develop in the Course of the experiment.26 p

Distraction osteogenesis for mandibular advancement

The purpose of this study was to investigate the possibilities of distraction osteogenesis to correct mandibular hypoplasia. Fourteen young patients (mean age 14.1 years) with a proven resistance to initial, functional orthodontic therapy, were treated by means of bilateral intraoral distractors. The corticotomy was performed in the region of the third molar. The latency time was six days and the stabilization period six weeks. In all cases the planned lengthening of the mandible and class 1 occlusion were achieved. Seven patients required additional elastic band traction to close a mild open-bite directly after active distraction. In the first seven patients, insufficient mobilization at the site of the corticotomy had resulted in a broken distraction rod in two patients and incomplete distraction of the lingual cortex in one patient. Adequate mobilization at the site of the corticotomy prevented these problems in later cases. No permanent sensory disturbances were seen. Twelve patients finished their orthodontic treatment within six months after distractio