Wednesday, October 5, 2022
|Photograph showing before and and after teeth whitening procedure.|
Composites are tooth coloured restorative materials that are usually recommended for class III, IV and class I cavities with less or no occlusal stress and esthetics are important. Specially designed composites are used in almost 50% of class II restorations, although less durable in comparison to dental amalgam. Composites can be classified as microfilled, nanofilled, flowable, packable, all purpose and laboratory. Composites are used for provisional restorations and core build-ups and in fibre-reinforced posts.
Properties of Composites
- Polymerisation shrinkage - should be low
- Water sorption - should be low
- Coefficient of thermal expansion - should be same as tooth
- Fracture resistance - should be high
- Wear resistance - should be high
- Radiopacity- should be high
- Bond strength to enamel & dentin - should be high
- Colour match to tooth structure - should be excellent
- Manipulation - should be easy
- Finishing and polishing - should be easy
Direct Esthetic Restorative Materials
There are four types of direct esthetic restorative materials currently in use. They are:
- Hybrid Ionomers
- Glass Ionomers
Composites are dominating the materials used for direct esthetic restorations. Glass ionomers are primarily used for restorations of cervical eroded areas. Hybrid ionomers provide better esthetics than glass ionomers. Compomers provide improved handling and fluoride release when compared with composites.
This story of a dentist tells about the journey of a dentist for ADC exam and the mental, physical and economic sufferings full family went through after his failure.
Ganesh was a general dental practitioner with a nice practice in a class two city. Isha was a tutor in a Dental college in the same city. The couple had been living a happily married life with their 5 years old son and their parents in a joint family.
|Saudi Arabia Riyadh landscape at Morning – Riyadh Tower Kingdom Centre, Kingdom Tower, Riyadh Skyline – Burj Al-Mamlaka, AlMamlakah – Riyadh at Daylight – Tower View-Getty Images|
Both Ganesh and his wife dropped the idea of ADC as it was clear, no matter how hard they try it, it was not meant for them. Moreover, they were out of funds, rather, better word was, in negative funds. So, to regain their lost finances, they modified their plan.
The plan was to try for a gulf job and regain the lost finance. They consulted with their friend who had the experience of the gulf job. Ganesh and his wife got a decent job in Saudi Arabia. It was a job in a remote area of the Kingdom, but since they had their own circumstance, they adjusted themselves in a few months.
In this world there is no end of issues, no matter where a person lives. This soon started being applied to them too. A recently came new dentist in their workplace had Arab origin and the staff started giving him preferential treatment. The distribution of work started skewing, putting Ganesh in a difficult situation. His wife was cool as being a female, she was spared or the person involved had no guts to disturb her and be caught in a situation that might have backfired.
Ganesh contacted his friend for solace. He understood his situation and the options available. He decided, as long as I am getting my salary, I have to stay here and refill my coffer. There was no second choice.
His wife and he stayed for five years in Saudi Arabia and then started thinking of coming back to India. They have earned sufficient, filled their coffer and most importantly regained the lost self esteem and self worth. Their family life has again come back on the smooth track.
Before coming back to India, Ganesh refurbished his old clinic when he had visited India last time. It was ready to start the work. Ganesh started working in his own clinical practice the next day of arrival to India. His wife got her old tutoring job back in the same college she was teaching in. Within a year, they decided to open a second clinic. Soon it was booming by the hard working ethics of his wife, who decided to go take the clinical practice as full time work.
The couple decided to buy a house near their old home and were happy ever after. Ganesh remained obliged to his friends who supported him during his bad time.
Tuesday, October 4, 2022
|Permlastic is a polysulfide, condensation-cured, elastomeric impression material in three viscosities|
The custom trays also known as special trays are fabricated so that the final impression of the patient’s edentulous mouth can be taken accurately with proper border extension. The selective pressure technique helps in making the impression in such a way that when the newly fabricated dentures are worn by a patient, they exert pressure only on those areas of the mouth that can withstand the masticatory load. The selective pressure technique of impression making spares the non-pressure bearing area of the edentulous jaw and thus eliminate the possibility of trauma resulting in pain and ulceration in the mucosa. The special tray for selective pressure technique is made on the primary cast that has been prepared by pouring the impression made in alginate or impression compound. The impression taken in impression compound records the mucosa in a compressed state whereas the impression taken with alginate records the mucosa in a non-compressed state. From these two opposite states of mucosa record, a dentist proceeds to prepare a special tray that is used to make an impression with selective pressure. We will learn here as to how to make a special tray on a cast that has been made from impression compound.
Monday, October 3, 2022
Types, clinical features, Causes prevention & treatment
Types of tooth wear
|Figure 1. Abrasion: note the concave smooth cavities in the cervical regions of upper and lower teeth.|
Causes of AbrasionIt is mostly located in the cervical area of the teeth. The reason may be one or a combination of the following factors:
- Excessive tooth brushing for longer period
- Use of hard tooth brush
- Use of tooth paste containing highly abrasive material
- Use of locally prepared tooth cleaning powder or paste like Gul, Gulak or Lal Manjan
- Repeatedly putting foreign objects in the mouth like pipe smoking, pen, bobby pins and any other occupational material.
Prevention of Abrasion
Treatment of Abrasive Lesions
|Figure 2. extreme attrition of teeth leading to loss of complete crown of mandibular teeth|