https://cmapspublic3.ihmc.us/rid=1266358861321_2027852911_13457/Wound%20Healing%20Dressings%20and%20Drug%20Delivery%20Systems.pdf

Wound healing dressings and drug delivery systems: a review.

Syntheses and application of polylactides.

Alginate based bilayer hydrocolloid films as potential slow-release modern wound dressing

In this study, hydrogel films composed of low methoxyl pectin (LMP), gelatin, and carboxymethyl cellulose (CMC) were fabricated. Glycerin was used as a plasticizer while glutaraldehyde (Glu) and calcium chloride (CaCl2) were used as crosslinking agents in film preparation. Hydrogel films were morphologically characterized and evaluated for mechanical properties. In addition, the investigations for fluid uptake ability, water retention capacity, water vapor transmission rate, and integrity value of the invented films were performed. The results showed that F-Glu-Ca-G30 film demonstrated superior properties when compared to other prepared films. It demonstrated a high percentage of elongation at break (32.80%), fluid uptake ability (88.45% at 2 h), water retention capacity (81.70% at 2 h), water vapor transmission rate (1889 g/m2/day), and integrity value (86.42%). F-Glu-Ca-G30 film was subsequently selected for 10% w/w povidone iodine (PI) loading and tested for anti-Staphylococcus aureus activity using an agar diffusion assay. Notably, F-Glu-Ca-G30-PI film demonstrated a dramatic ability to inhibit microbial growth, when compared to both a blank film and iodine solution control. Our LMP/gelatin/CMC hydrogel film promises to be an effective dressing material with high fluid absorption capacity, fluid holding ability, and water vapor transmission rate. Incorporation of antibiotics such as povidone iodine into the films conferred its antimicrobial property thereby highlighting its potential dermatological use. However, further clinical studies of the application of this hydrogel film as wound dressing material is recommended.

https://www.mdpi.com/1996-1944/12/10/1628/pdf

Fabrication and Characterization of Low Methoxyl Pectin/Gelatin/Carboxymethyl Cellulose Absorbent Hydrogel Film for Wound Dressing Applications

Resorbable materials have gained a considerable position in the daily routine of all surgical disciplines. Natural products like catgut and collagen have been used historically. Since the development of synthetical macromolecules more than 40 years ago, the range of indications for the use of such materials has widened significantly in our daily routine. Suture materials, mesh, tissue pads, clips, screws and anchors are in use. More recent developments in the field of orthopedic and trauma surgery include screw-plate systems, wound dressing materials and films for the prevention of adhesions and ossifications. This appears to be the beginning of an era of new materials as these implants not only fulfil a temporary biomechanical role but in theory also can release a controlled amount of biologically active substances at a set timeframe. Also they are potential carriers for transplants on a cellular level. This aspect will be of importance in the orthopedic field, where resorbable films only play a minor role so far. At the moment there are six resorbable or biodegradable films or foils on the market that are used or can be used in the field of orthopedic and trauma surgery. These are foils and films made of following materials: carboxy-methyl-cellulose and hyaloronic acid (Seprafilm®), oxydized regenerated cellulose (Interceed®), polydioxanon (PDS®) and copolymers of lactid und caprolacton (Topkin®, Oprafol®, Mesofol®). Main indications for their use are wound dressing, especially after split skin graft and thermal wounds, prophylaxis of adhesions and prevention of the formation of synostoses and heterotopic ossifications. The results of clinical trials are promising and the increasing number of publications in the last 5 years in this field is an expression of increasing demand of these materials. However, it could also be an expression of the growing interest in drug delivery techniques as well as in tissue engineering which are possible with these materials.

Biodegradable Films in Trauma and Orthopedic Surgery

Most of the temporary dressings used in the treatment of burns do not meet the objectives of a skin substitute concerning application, safety and comfort. Removal is often painful and traumatic and increases the risk of infection. Biodegradable polymers of lactic and caproic acid were developed as part of a research programme (BMFT/FRG 01 KG 8809/7), and chemical and physical properties were investigated. Films made of the copolymer material were characterized by structure, transparency, permeability, tensile strength, flexibility and degradation. The transparent films appeared increasingly opaque during hydrolysis. The water vapour permeance could be varied between 40 and 250 (40-136) ml/m2 per h (according to the method of measurement). The mechanical properties are characterized by a maximum elongation of > 2000% at 37 degrees C and a very low elastically modulus. When the results were compared with those of three established film dressings, no restriction was found in the aptitude of the material as a wound dressing.

Development and characterization of an absorbable temporary wound dressing

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Development and characterization of an absorbable temporary wound dressing