Glass-hybrids: your partner in routine work
Restoring carious teeth is one of the major treatments that dentist provide for their patients. Glass hybrid materials are one of promising option for restoring the teeth. The main objective of this lecture is to show clinical use and advantages of glass-hybrid material in everyday practice.
Restoring carious teeth is one of the major treatments that dentist provide for their patients. There are many treatment options choice of which depends on caries risk of the patient, location and extent of the lesion, lesion activity and, of course, special demands placed on the restoration. New restorative concept based on glass hybrid technology, which combines GIC with different sizes of filler particles and nano filled composite resin coat, is a promising option for restoring the teeth. This material offers all the benefits of GIC, like strong chemical adhesion and bioactivity, but also high aesthetics, good and improved mechanical properties. Material is very suitable for application in deep cavities in the posterior region as it can heal damaged and demineralized dentin. Besides the role of fluorides in remineralization, there is also evidence of the transfer of calcium, phosphate and strontium ions from GIC deep into the demineralized dentin and surrounding enamel. When attempting to preserve pulp vitality and remove only infected dentin, the use of a highly viscous GIC is advantageous as its micro-tensile bond strength to affected dentin is not reduced in comparison to the bond to healthy dentin, while composite resin materials show lower bond strengths to caries-affected dentin.
As life expectancy is constantly increasing, the population is aging and changes in hard dental tissues and soft tissues associated with patients age or medical status can be seen in everyday clinical practice. Over time, teeth are exposed to different physiological and even pathological conditions. In older patient, wear and tear of hard dental tissues will be clearly visible and more pronounced with age. Furthermore, there is a high chance that the older patients will suffer from various medical problems and will need medications due to one or more chronic diseases. Unfortunately, some medications may result in certain side effects like salivary hypofunction and dry mouth. One should also bear in mind the physiological state of older patients as they may lack motivation for oral hygiene and regular dental visits. Moreover, soft tissues changes include gingival recession which causes exposed root surfaces so root caries lesions are frequently observed. Older patients will most certainly have some previous restorations, fixed prosthodontics work or removable partial dentures which can all present retention sites for food and plaque. Due to all aforementioned factors, older patients are usually high risk patients so they can benefit from restorative materials which are bioactive and have remineralising potential like GIC. Another specific group of patients are children. Restoring carious teeth is one of the major treatment needs of young children. What is specific for primary dentition is that there is a limited lifespan of the teeth and lower biting forces. Furthermore, when treating young children, we are in the need of a material that requires a short time to fill cavity using bulk technique. Another problem is maintaining a dry working field in young children but GIC are moisture tolerant materials and their adhesion or mechanical properties will not deteriorate in case of a small presence of moisture from saliva.
The main objective of this lecture is to show clinical use and advantages of glass-hybrid material in everyday practice.
- Describe glass-hybrid materials.
- Explain the current state of knowledge on clinical use of glass hybrid materials
- Contextualize strategies for restoring tooth lesions in different clinical situation