Various cases of fixed partial dentures S. Viennot , , Assistant hospitalo-universitaire, ancien interne en odontologie, G. Malquarti, Professeur des Universités, praticien hospitalier, chef du service d'odontologie de Lyon, Y. Allard, Maître de conférences des Universités, praticien hospitalier and C. Pirel, Professeur de premier grade, praticien hospitalier

Service d'odontologie des Hospices civils de Lyon, Unité fonctionnelle de prothèses, 6-8, place Depéret, 69372 Lyon, France Available online 8 March 2005.

Abstract

Many therapeutic options may be considered for edentation. Most of the time, fixed partial denture (the so-called "bridge") is the choice, since this procedure complies with aesthetic, functional and psychological consideration. Fixed partial denture is a therapeutic option that allows replacing one or several missing teeth; the procedure may consist in a small bridge elaboration, but it may also refer to important rehabilitation including both arcades. In addition to standard realisations, the development of implant techniques, the availability of novel material and the improvement in pasting procedures have allowed an overall more conservative approach based on the preservation of the tooth. The current paper is aimed at providing a simplified guide describing the various types of bridges that may currently be implemented, together with their indications and elaboration specificities.

Mots clés: Bridges; Prothèse fixée; Prothèse sur implants; Prothèse collée; Pontiques
Keywords: Fixed partial dentures; Fixed prosthesis; Implant prosthodontics ; Resin-bonded prosthesis; Pontics

The application of alveolar distraction osteogenesis following nonresorbable hydroxyapatite grafting in the anterior maxilla:

A clinical report

Cecilia E. Aragon DDS, MS a, , and Richard N. Bohay DMD, MSc b

a Assistant Professor, Division of Restorative Dentistry
b Associate Professor, Division of Oral Medicine and Radiology

Faculty of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada. Available online 8 June 2005.

Distraction osteogenesis is a method of increasing bone length through the application of slow, controlled force on bone segments where periosteum and medullary blood supply are maintained. Recently, the procedure has been adapted to alveolar augmentation prior to prosthodontic rehabilitation. This report describes the use of alveolar distraction in the anterior maxilla and presents, to the authors' knowledge, the first reported successful application of the technique following nonresorbable hydroxyapatite grafting.

The effect of purmorphamine on osteoblast phenotype expression of human bone marrow mesenchymal cells cultured on titanium Márcio M. Beloti, Larissa S. Bellesini and Adalberto Luiz Rosa ,

Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirao Preto, University of Sao Paulo, Av do Cafe, s/n, 14040-904 Ribeirao Preto, SP Brazil
Received 10 August 2004; accepted 29 October 2004. Available online 8 December 2004.

Abstract

Purmorphamine is a new molecule with osteogenesis-inducing activity in multipotent progenitor cells. The aim of this study was to evaluate whether purmorphamine maintains its osteogenic potential on human bone marrow mesenchymal cells cultured on commercially pure titanium (cpTi). Cells were cultured either in the absence or presence of purmorphamine 3 μM on cpTi in supplemented α-MEM. At 7, 14, and 21 days, cell proliferation, viability, total protein content, collagen content, and alkaline phosphatase (ALP) activity were evaluated. Bone-like nodule formation was evaluated at 21 days. All experiments were done in quintuplicate and data were compared by ANOVA or t-test. Purmorphamine did not affect cell proliferation ( p=0.619), viability (p=0.831), and collagen content (p=0.088). Total protein content (p=0.047), ALP activity (p=0.001), and bone-like nodule formation (p=0.002) were increased by purmorphamine. The present results indicate that events related to osteoblast differentiation, including increased ALP activity and bone-like nodule formation, are enhanced by purmorphamine in the presence of cpTi. It means that this molecule could be useful as an adjunct therapy to improve the osseointegration of the implants in the fields of dentistry and orthopaedics.

Keywords: Cell differentiation; Human bone marrow mesenchymal cells; Osteoblast; Purmorphamine; Titanium