orthodontic Invisalign
In recent years, increasing numbers of adult patients have sought orthodontic treatment and expressed a desire for esthetic and comfortable alternatives to conventional fixed appliances.
Clear aligners are the new age Aesthetic Orthodontic treatment .The demand of invisalign is increasing now a days due to its esthetic demand for those patients who are indisposed of wearing usual orthodontic appliances. Invisaligners are thin transparent removable unobserved plastic aligners for successful moving of teeth into their required position.
What is the Invisalign Appliance?
The Invisalignis made up of a transparent, thin plastic material formed with CAD-CAM laboratory techniques to gradually guide the teeth into proper alignment. As a technique, it has been commercially available for a decade.The aligners are analogous to the splints that cover the clinical crowns as well as the marginal gingiva. Each aligner is planned to move the teeth a maximum of about 0.25 to 0.3 mm over a 2-week period. Excellent observance is mandatory as the appliance has to be worn a minimum of 20 to 22 hours a day and each aligner should be worn 400 hours to be effective.
Such aligner is worn for approximately 20 hours per day and is changed approximately every two weeks.
each aligner will move the teeth around 0.25 to 0.3 mm.
INDICATIONS FOR INVISALIGN APPLIANCES
• Mild crowded and malalingned problems (1-5 mm)• Spacing problems (1-5 mm)
• Deep overbite (Class II div 2 cases )
• Narrow arches that can be expanded without tipping the teeth too much.
• Absolute intrusion (1 or 2 teeth)
• Lower incisor extraction for severe crowding cases.
• Tip molar distally
ADVANTAGES5
• The trays are clear, aesthetic, comfortable – no metal brackets or wires to cause mouth irritation or lacerations.• Clear aligners are often not visible, allowing patients to smile with greater confidence
• Better oral hygiene than fixed. Unlike traditional braces, the trays can be removed for brushing, flossing, and eating.
• Shorter dental appointments.
• Retention facilitated.
• Ideal for retreatment.
• Decreased occlusal abrasion from parafunctional habits during treatment.
• Disarticulation of the teeth may be advantageous for patients with TMJ problems.
• Technically much easier than lingual appliances.• Approximating the treatment duration a little more precisely than braces
• Avoiding extractions of premolars by creating interdental space via interproximal reduction
• Less frequent trips to the dental chair by allowing the patients to replace their aligners on their own every few weeks
• Healthier periodontal tissue and less risk of enamel decalcification by avoiding brackets
The Invisalign system also boasts improved hygiene over traditional braces. Because the clear retainers are removable, patients can brush and floss as they normally would, reducing the chances of possible staining and decay that often occurs with traditional braces.
Food and drink choices are less restrictive, as well. If patients wish to eat sticky candy or drink soda, they may do so after removing their clear Invisalign retainer.
DISADVANTAGES
removable in nature.patient motivation required.
it should be worn 22 hrs/ day.
Devices should be removed during meals.
poor patient compliance
missed appointments, deprived oral hygiene and excessive bone enlargement lengthen treatment time and affect quality results.
increase in price.
Intermaxillary Appliances
The removable clear Invisalign appliance around the teeth decreases the use of interarch mechanics (e.g., Class II and Class III elastics). Some practioners are using elastics on buttons bonded to the buccal surfaces as adjuncts to tooth movement.
Treatment Time
The treatment duration is prolonged as the treatment plan must include the chronological movements for every tooth from starting to end of the treatment.If changes are required once the treatment starts, significant additional span and documentation are required to alter the treatment plan. In addition, the lag time between formulating a treatment plan and inserting the appliance can be up to 2 months.
CLINICAL METHOD
Pretreatment study models are prepared.In addition, it is important to prepare high precision impressions by using polyvinyl material.
The bite is also recorded, and the impressions are sent to the Invisalign office.
Highly sophisticated softwares are used, which through a 3D scan technology create a virtual patient. Other specific softwares include ‘Tooth shaper’ & ‘Autobite tool’ which identify the shape of the teeth and occlude them in centric relation.
With the help of other software like ClinCheck set-up, diagnosis and treatment planning is done which is also used to evaluate the need for (interproximal reduction) IPR, extraction, expansion, distalization and proclination. It also show treatment limits to patient as it evaluates the anchorage with superimposition or surgical simulation tools.
Aligners other than Invisalign are USFDA approved:
Clear path aligners,Inman aligners,
Nuvola And Fantasmino System.