'satisfactory smile' with a restorative approach - Indian Dental ...

More documents

Recommendations

Info

IMAGE 2010-11 ISSN: 2229-5658 Vol No: 11 ISSUE No: 4 43 Cronbach's Alpha Reliability coefficient 0.9929 Very good agreement Table 2 Comparison between four blinded observers and their reliability. Various methods N Short Over Acceptable Accuracy (%) Conventional radiography 40 10 1 29 72.5 Radiovisiography 40 4 2 34 85 Raypex5 apex locator 40 1 3 36 90 Table 3 Evaluation of the position of file with respect to the apical foramen. Legends 1. Table 1 Comparison of the root canal lengths obtained by three different methods with actual root canal length. 2. Table 2 Comparison between four blinded observers and their reliability. 3. Table 3 Evaluation of the position of file with respect to the apical foramen. 4. Figure 1 Mounted tooth on prepared jig. 5. Figure 2 Measurement with apex locator. Figure 1 Mounted tooth on prepared Figure 2 Measurement with apex locator ********************** Visit: http://image.idakunnamkulam.com/ The International Journal of Indian Dental Association, Kunnamkulam Branch. Indexed in Journals Master List of IC TM
IMAGE 2010-11 ISSN: 2229-5658 Vol No: 11 ISSUE No: 4 44 Mode of action of a bracket The application of braces moves the teeth as a result of force and pressure on the teeth. There are four basic elements that are needed in order to help move the teeth. In the case of traditional metal or wire braces, one uses brackets, bonding material, arch wire, and ligature elastic, also called an ìO-ringî to help align the teeth. The teeth move when the arch wire puts pressure on the brackets and teeth. Sometimes springs or rubber bands are used to put more force in a specific direction. Braces have constant pressure, which over time, move teeth into their proper positions. Occasionally adults may need to wear headgear to keep certain teeth from moving. When braces put pressure on ones teeth, the periodontal membrane stretches on one side and is compressed on the other. This movement needs to be done slowly otherwise the patient risks losing his or her teeth. This is why braces are commonly worn for approximately two and a half years and adjustments are only made every three or four weeks. This process loosens the tooth and then new bone grows in to support the tooth in its new position which is technically called bone remodeling. Bone remodeling is a biomechanical process responsible for making bones stronger in response to sustained loadbearing activity and weaker in the absence of carrying a load. Bones are made of cells called osteoclasts and osteoblasts. Two different kinds of bone resorption are possible which are called direct resorption, starting from the lining cells of the alveolar bone, and indirect or retrograde resorption, which takes place when the periodontal ligament has become subjected to an excessive amount and duration of compressive stress. Another important factor associated with tooth movement is bone deposition. Bone deposition occurs in the distracted periodontal ligament and without bone deposition, the tooth will loosen and voids will occur distal to the direction of tooth movement. A tooth will ORTHODONTICS INVISIBLE BRACKETS Dr.Bastian Varkey N, Modern Dental Clinic, Thaikkad, Guruvayoor. usually move about a millimeter per month during orthodontic movement, but there is high individual variability. Orthodontic mechanics can vary in efficiency, which partly explains the wide range of response to orthodontic treatment. Straight teeth and a revitalized smile may no longer need to come from a mouth full of unattractive wire and bracket braces. Enhancing self-esteem and physical confidence, invisible braces offer an esthetic and barely visible alternative to conventional wire/bracket braces. The clear aligners (also called clear braces) are manufactured using advanced computer technology that predicts tooth movement, making it possible for the removable orthodontic appliance to gradually straighten teeth. Conditions Treated with Invisible Braces While invisible braces may not be suitable for certain misalignment cases or the complex bite problems that are better addressed by traditional orthodontics, invisible braces can be used to treat the following orthodontic conditions: � Overbite or overjet � Crowded or widely spaced teeth � Crooked teeth Invisible braces are designed for adults and older teenagers; invisible braces are not recommended when baby teeth remain. Children and younger teenagers faced with orthodontic problems will require traditional metal braces with brackets/wires on the front of the teeth. However, only your dentist or orthodontist can determine if you are a candidate for invisible braces. The clear aligner treatment was designed primarily for adults due to the need for absolute and rigid cooperation; the trays are worn 22 hours per day and should not be forgotten or lost. Visit: http://image.idakunnamkulam.com/ The International Journal of Indian Dental Association, Kunnamkulam Branch. Indexed in Journals Master List of IC TM
Page 2 and 3: IMAGE 2010-11 ISSN: 2229-5658 Vol N
Page 8 and 9: Dr. George Thomas IMAGE 2010-11 ISS

'satisfactory smile' with a restorative approach - Indian Dental ...

Create successful ePaper yourself

Delete template?

Save as template?