Malocclusion Clinical Trial
Official title:
A Single-site Self-controlled Comparative Study of Conventional Versus Digital Peer Assessment Rating (PAR) Using the Carestream (CS) 3600 Intraoral Scanner in Orthodontic Patients
Verified date | February 2019 |
Source | King's College London |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
In dentistry, Peer Assessment Rating (PAR) is an objective way of quantifying how maligned a
patient's teeth are by scoring orthodontic study models. It can also be used to assess
treatment outcome by comparing pre- and post-treatment scores. Traditionally, PAR scoring is
performed manually on plaster casts by a trained and calibrated individual. The plaster casts
consume considerable amounts of storage space and the process of manual scoring can be time
consuming and expensive. The recent decades have seen a rise in popularity of intra oral
scanners in dentistry to produce digital study models. These obviate the need for physical
storage space and a software can be used to calculate PAR scores more conveniently and at a
faster speed. A review of the current literature showed that the CS 3600 intra oral scanner
by Carestream Dental demonstrated acceptable accuracy for clinical use.
In this study, patients will receive the usual impressions and their moulds will be PAR
scored manually (usual care pathway). In addition, they will also receive intra oral scans
with Carestream 3600 and the digital models will be scored by a computer. Manual and digital
scores will be compared and analysed for any significant discrepancies.
Status | Completed |
Enrollment | 70 |
Est. completion date | January 7, 2019 |
Est. primary completion date | December 15, 2018 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 11 Years to 50 Years |
Eligibility |
Inclusion Criteria: 1. Patients undergoing orthodontic treatment at Kingston Hospital 2. Patients who have completed their orthodontic treatment and are attending for retainer reviews at Kingston Hospital 3. age 11-50 Exclusion Criteria: 1. patients with fixed or bonded appliances 2. age <11 or >50 3. Inability to gain informed consent due to communication barriers |
Country | Name | City | State |
---|---|---|---|
United Kingdom | Kingston Hospital | Kingston Upon Thames |
Lead Sponsor | Collaborator |
---|---|
King's College London | Kingston Hospital NHS Trust |
United Kingdom,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Peer Assessment Rating (PAR) score | PAR score is an objective and standardised way of quantifying how much the position of teeth deviate from an ideal. Sub-scores are given in 5 categories assessing the position of teeth to adjacent teeth in same jaw as well as the opposing jaw. The sub scores are weighted according to their importance as described by Richmond et al. (1992) and then added to give a total score. Total scores may range from 2 to approximately 50. The higher the score, the greater the deviation from ideal. | 6 months | |
Secondary | The length of time (in minutes) taken to obtain conventional impressions | The time taken to take conventional impressions (from insertion into the mouth until removal from the mouth) will be measured using a stop watch. The time taken to create digital impressions (from activating the scanner until completion of the scan, including any areas that need to be re-scanned) will also be measured using a stop watch. | 6 months | |
Secondary | The length of time (in minutes) taken to obtain digital scans | The time taken to take conventional impressions (from insertion into the mouth until removal from the mouth) will be measured using a stop watch. The time taken to create digital impressions (from activating the scanner until completion of the scan, including any areas that need to be re-scanned) will also be measured using a stop watch. | 6 months | |
Secondary | The cost involved in creating digital scans | In order to calculate the cost of conventional models, the sum of the following will be calculated: cost of impression material (the amount of impression material used will be recorded), cost of impression tray, cost of tray adhesive, disinfection cost, laboratory and transport cost. In order to calculate the cost of digital impressions, the sum of the following will be calculated: cost of scanner and software, cost of disposable scanner tip covers |
6 months | |
Secondary | The cost involved in creating conventional models | In order to calculate the cost of conventional models, the sum of the following will be calculated: cost of impression material (the amount of impression material used will be recorded), cost of impression tray, cost of tray adhesive, disinfection cost, laboratory and transport cost. In order to calculate the cost of digital impressions, the sum of the following will be calculated: cost of scanner and software, cost of disposable scanner tip covers |
6 months | |
Secondary | Do patients prefer conventional impressions or intraoral scans? | This will be assessed by means of a questionnaire consisting of 3 validated questions. The questions are designed to establish which of the two procedures the patient found 1. more comfortable, 2. quicker and 3. which they would prefer to undergo again. | 6 months |
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