1 Definition of bioplastics The two main groups of bioplastics are biobased polymers and biodegradable plastics. Biobased polymers are derived from biomass sources, which are not necessarily biodegradable. Biodegradable plastics, on the other hand, can be either made of natural or fossil sources. In 2012, the IUPAC recommended a terminology for biorelated polymers [1, 2]. Two further, special c...

The security risk of magnesium alloys used as biodegradable implant material was evaluated in this study. Dose-response assessment was conducted by using toxicological data from authoritative public health agencies (World Health Organization) and assuming 1~3 years of uniform corrosion. Through modification calculation, the tolerable corrosion rate of biodegradable magnesium alloys in vivo was ...

OBJECTIVES The aim of the present randomized clinical trial was to evaluate marginal bone loss around two types of implants modified at the neck area: Nobel Active and Nobel Replace Groovy, both manufactured by Nobel Biocare. MATERIALS AND METHODS A total of 25 Nobel Active and 21 Nobel Replace Groovy implants were included in the present study. The implants were placed based on the relevant ...

Implant materials need to be highly biocompatible to avoid inflammation in clinical practice. Although biodegradable polymeric implants can eliminate the need for a second surgical intervention to remove the implant materials, they may produce acidic degradation products in vivo and cause non-bacterial inflammation. Here we show the strategy of "substrate-anchored and degradation-sensitive coat...

Fretting is a significant cause for the failure of orthopedic implants. Currently, since magnesium and its alloys have been developed as promising biodegradable implant materials, the fretting behavior of the Mg alloys is of great research significance. In this study, a Mg-Nd-Zn-Zr alloy (hereafter, denoted as JDBM alloy) was selected as experimental material, and its fretting behaviors were ev...

We present two patients, respectively 14 and 18 years old, who sustained an osteochondral fracture of the weight-bearing part of the lateral femoral condyle, which was treated operatively with biodegradable self-reinforced polylactide rods. The first patient was operated 60 days after the injury, the second one on the third day. The clinical and functional results were good in both cases one ye...

Guided bone regeneration (GBR) is a therapeutic procedure used to enhance alveolar volume before dental implants. Commercial non-absorbable membranes (i.e., titanium membranes) typically require second surgery remove, whereas absorbable collagen will fail when put over extensive lesions due their low mechanical strength. The GBR membrane that has been sought still being developed. Biodegradable...

BACKGROUND The history of gluteoplasty augmentation includes only a few reported clinical series. OBJECTIVE We report our experience in performing gluteal augmentation using an intramuscular technique in 160 cases over 15 years. We also establish guidelines for performing this procedure. METHODS All patients were women, ranging in age from 18 to 65 years, who underwent intramuscular gluteop...

OBJECTIVE To determine the incidence of postoperative rotation of flattened hydroxyapatite enucleation implants. METHODS A retrospective review of patients receiving flattened hydroxyapatite enucleation implants was performed to determine the incidence and severity of postoperative implant misalignment. RESULTS Flattened hydroxyapatite implants had been placed in 16 patients. Five were note...

This study was conducted to evaluate the effect of timing and force of loading, as well as implant location, on bone-to-implant contact (BIC) of loaded and control miniscrew implants (MSI). Using seven skeletally mature male beagle dogs, 1-2 years of age, followed over a 110 day period, a randomized split-mouth design compared immediate versus delayed loading, 50 versus 25 g loading, and 25 g l...