The formation of enamel, dentine and cementum involves the initial secretion of an organic matrix by ameloblasts, odontoblasts and cementoblasts respectively. This matrix is subsequently ‘loaded’ with mineral principally calcium hydroxyapatite (Ten Cate 1998). When peripheral cementum is still lying sub-gingivally (alveolar crown or gingival crown) (Mitchell 2004), it is nourished by the period...

As part of the paradigm shift toward more minimally invasive surgical procedures, increasing numbers of references to laser-mediated flapless crown lengthening are noted in the published literature. The vast majority of these references are noncontrolled case reports or technique-focused articles. Therefore, prospective, randomized controlled studies that objectively examine the safety and effi...

A complete single-tree remote sensing (STRS) system is presented and a restricted test of performance is given. The system can be used for solving the tasks of STRS: tree positioning, height estimation species recognition, crown width estimation and estimation of the stem dimensions. The system is based on a semi-automatic approach and where automatic solutions fail, operator input is used. Kno...

The observed recent freshening trend in the deep North Atlantic and the Labrador Sea is investigated in three forced ensembles and a long control simulations using the HadCM3 coupled ocean–atmosphere–sea-ice climate model. The 40 yr freshening trend during the late half of the 20th century is captured in the all forcings ensemble that applies all major external (natural and anthropogenic) forci...

Surgical crown lengthening has been proposed as a means of facilitating restorative procedures and preventing injuries in teeth with structurally inadequate clinical crown or exposing tooth structure in the presence of deep, subgingival pathologies which may hamper the access for proper restorative measures. Histological studies utilizing animal models have shown that postoperative crestal reso...

Crown rust, caused by the fungal pathogen, Puccinia coronata Corda var. avenae W.P. Fraser Ledingham, reduces kernel quality and grain yield in oat (Avena sativa L.). Partial resistance is considered to be a durable form of rust resistance. This study sought to evaluate the feasibility of simultaneously improving partial resistance to crown rust, grain yield, and seed weight in an oat populatio...

objectives: it is not clear what type of pre-crimped crown is more successful in achieving greater marginal adaptation following re-crimping. this study aimed to assess the changes in the circumference of 3m espe and mib pre-crimped stainless steel crowns (sscs) for the primary maxillary and mandibular first and second molars following re-crimping. materials and methods: this was an in-vitro, e...