Antti Kärkkäinen Dynamic Simulations of Rotors during Drop on Retainer Bearings Lappeenranta, 2007 91 p. Acta Universitatis Lappeenrantaensis 279 Diss. Lappeenranta University of Technology ISBN 978-952-214-444-7; ISBN 978-952-214-445-4 (PDF) ISSN 1456-4491 The active magnetic bearings have recently been intensively developed because of noncontact support having several advantages compared to c...

This technique can be used as an immeciate short-term solution after extraction, implant placement or grafting procedures. Long-term use is not appropriate and it is not suitable where there is poor hygiene or a high smile line where the junction of the flange and soft tissue would be conspicuous. This device is easily removed to facilitate hygiene, it is available almost immediately, is inexpe...

OBJECTIVE To compare the periodontal health of maxillary and mandibular anterior teeth retained with two types of fixed retainers. MATERIALS AND METHODS A fixed straight retainer (SR) group had 39 subjects, and a fixed wave retainer (WR) group had 35 subjects. Subjects were between the ages of 13 and 22 years and had been in fixed retention for 2 to 4 years. Pocket probing depths, bleeding on...

INTRODUCTION A retainer bonded to the lingual surfaces of the mandibular canines (3-3 retainer) is a widely used type of retention. Our aim in this study was to assess the effectiveness of the 3-3 mandibular lingual stainless steel retainer to prevent relapse of the orthodontic treatment in the mandibular anterior region. METHODS The sample consisted of the dental casts of 235 consecutively t...

BACKGROUND The purpose of this study was to evaluate changes in nasal growth after the implementation of a preoperative nasal retainer in patients with bilateral incomplete cleft lip. METHODS Twenty-six infants with bilateral incomplete cleft lip and cleft palate were included in the study. A preoperative nasal retainer was applied in 5 patients from the time of birth to 2.6-3.5 months before...

BACKGROUND There are few cost evaluation studies of orthodontic retention treatment. The aim of this study was to compare the costs in a randomized controlled trial of three retention methods during 2 years of retention treatment. MATERIALS/METHODS To determine which alternative has the lower cost, a cost-minimization analysis (CMA) was undertaken, based on that the outcome of the treatment a...

BACKGROUND The aim of this prospective clinical study was to compare the mean durability and the failure rates of two types of orthodontic retainers. METHODS Orthodontic patients (142) aged between 14 and 28 years were recruited in this study. The polyethylene woven ribbon (Ribbond, Seattle, WA, USA) retainer was compared with a 0.0175-in flexible spiral wire (Respond, Ormco, Glendora, CA, US...

SUMMARY BACKGROUND/OBJECTIVES Social perceptions are influenced by dental appearance. The aim of this study was to determine whether social perceptions of a young adult are influenced by orthodontic retainer design and appearance. MATERIALS AND METHODS Following ethical approval, a pilot-tested questionnaire study was conducted with 402 third-level students from the Republic of Ireland. Each ...

INTRODUCTION The objectives of this study were to evaluate fixed bonded palatal surface retainers between the maxillary central incisors that were placed to maintain midline diastema closure and record their longevity, proclivity for damage, and periodontal health of the central incisors in patients 5 or more years after treatment. METHODS Twenty-nine subjects were contacted and interviewed b...