Energy absorption and hardness of chair-side denture soft lining materials.

The purpose of this study was to evaluate the hardness and energy absorption properties of four commercially available chairside silicone denture soft lining materials and to compare their properties with those of a heat-polymerized silicone denture liner. The denture lining materials investigated were four auto-polymerising silicone soft liners (GC Reline Soft, Ufigel SC, Elite Soft Relining and Tokuyama Sofreliner S) and a heat-polymerised silicone liner (Molloplast B). The soft liners were processed according to manufacturers' instructions.

Two- and three-dimensional accuracy of dental impression materials: effects of storage time and moisture contamination.

Dental impression materials are used to create an inverse replica of the dental hard and soft tissues, and are used in processes such as the fabrication of crowns and bridges. The accuracy and dimensional stability of impression materials are of paramount importance to the accuracy of fit of the resultant prosthesis. Conventional methods for assessing the dimensional stability of impression materials are two-dimensional (2D), and assess shrinkage or expansion between selected fixed points on the impression.

The prevalence of dental, facial and head injuries sustained by schoolboy rugby players. A pilot study.

Aim: The aim of the study was to determine the prevalence of dental, orofacial and head injuries and of mouthguard use among schoolboy rugby players.

Materials And Methods: All members of the first and second XV rugby squads at three secondary schools (two in England and one in Australia) were included in the study. All participants answered a questionnaire that sought information regarding dental, orofacial and head injuries.

A pilot study of the prevalence of orofacial and head injuries in schoolboy cricketers at eight private schools in England and Australia.

Aims: The aims of this pilot study were to determine the prevalence of head, face and dental injuries sustained by schoolboys while playing cricket and to compare the prevalence of those injuries in England and Australia.

Methods: A questionnaire that determined distribution and prevalence of orofacial injuries sustained when playing cricket was distributed to all players (n=411) who played cricket in four private schools in England and four private schools in Australia. There was a 100% response rate.

The prevalence of orofacial pain and tooth fracture (odontocrexis) associated with SCUBA diving.

Aim: To assess the prevalence of orofacial complications associated with SCUBA (self-contained underwater breathing apparatus) diving. Main outcome measures were prevalence of orofacial pain and odontocrexis.

Method: Two hundred divers at four dive centres on the north-east coast of Australia were asked to complete a questionnaire that requested information regarding diving experience and facial pain and dental symptoms experienced during diving.

Some variables influencing the bond strength between PMMA and a silicone denture lining material.

Purpose: The purpose of the present study was to investigate the effect of roughening the denture base surface on the tensile and shear bond strengths of a poly(dimethylsiloxane) resilient lining material (Molloplast-B) bonded to a heat-cured acrylic resin denture base material. These measured bond strengths were compared to those obtained by packing the soft lining material against poly(methyl methacrylate) (PMMA) denture base acrylic resin dough.

Materials And Methods: Three groups of 10 specimens each were constructed for both tensile and shear tests.