Fabrication and evaluation of Bis-GMA/TEGDMA resin with various amounts of silane-coated silica for orthodontic use.

The objective of this research was to fabricate a composite with an optimum filler level in a bisphenol-A-glycidyldimethacrylate (Bis-GMA) triethylene glycidal dimethacrylate (TEGDMA) resin for bonding of metallic orthodontic brackets to achieve the best handling characteristics with optimum bond strength and without compromising the mechanical properties of the adhesive. One-hundred and sixty extracted human premolars free of any detectable pathology or buccal surface alterations were collected and divided into four groups. In group 1 (control), the teeth were bonded with stainless steel brackets using Transbond XT.

Iatrogenic damage in orthodontics: aetiology and prevention.

Unlabelled: The purpose of this article was to analyze the various factors responsible for iatrogenic damage to a patient in an orthodontic practice and to advise precautions to prevent such damage.

Methods: All case reports describing iatrogenic damage published in all orthodontic journals indexed on PubMed and the related articles of all these case reports published in any journal.

Conclusions: Good preventive practices can reduce and even completely eliminate the damage produced by the orthodontic operator.