Comparison of the Accuracy and Reliability of Measurements Made on CBCT and IOS Images With Their made-on Plaster Models.

NCT05711160 | Completed

• 1 other identifier: SL1990
• Study Type: observational
• Target: 51
• Locations: 1 country
• Sites: 1

Brief Summary

The orthodontist uses plaster models to collect information. This includes identification deviations, classification of malocclusion, formulation of treatment goals for specific patient. Models are used to examine the morphology of individual teeth and also to visualize the placement of teeth in individual dental arches. Study models It therefore appears to be one of the most important records for treatment planning. In USA, orthodontist can start practicing orthodontics which requires a lot of difficulty 300 new cases in a year and therefore may require an entire room to store plaster models. The minimum file retention period depends on the appropriate platform for the statute of limitations during which legal action for fault can be brought. in the USA, this time period varies from 5 to 15 years, varies from country to country. This platform can be started on the last day of treatment, or it can be postponed until the patient reaches adulthood. Regardless of how it is viewed, long term storage is required. Over ten years, if 300 new cases are initiated each year, that will represent 6,000 combinations of prototyping, pre-processing and post-processing. Additional storage space may be required, maybe somewhere else, with financial implications. With the recent introduction of digital models and CBCT images, the orthodontist now has an alternative to traditional plaster study models. Digital technology makes it possible to analyze a computer using software capable of rotating, examining and measuring digital images of the model and dental arches from different points of view. The intraoral scanner is a hand-held device that creates digital impressions of the oral fossa and displays it in 3D on a computer screen after being processed by the scanning program for each device. By 1985 the first intraoral scanner was available for commercial use, and over time it had evolved to become smaller, faster, and more accurate. Intraoral scanners provide easier treatment planning, better workflow, greater patient acceptance and shorter working time, but more studies are needed to investigate their accuracy and compare with traditional methods. The measurements of the tooth widths are one of the important elements in orthodontic diagnosis because of its role in calculating the partial and total Bolton ratio, the Ton relationship, and space analysis. Therefore, the aim of this study will be to assess the accuracy and reliability of measuring teeth widths and Bolton ratios based on three mains well -known methods (plaster models, CBCT images and intraoral images) to ensure the safety of orthodontic diagnostic outputs.

Conditions

Malocclusion

Keywords

plaster model; cone beam computed tomography.; intraoral scanner; teeth widths; Bolton' ratios.; CBCT; IOS

Outcome Measures

Primary Outcomes (9)

• Tooth width using plaster models.

  Maximum mesiodistal width of each crown (from the first molar to the first molar of each jaw) has been measured between the anatomic contact areas when the teeth will correctly align using a digital electronic caliper. The result is expressed in mm.

  After seven days of taking the impressions of the dental arches. Silicon Impressions have been taken in the same day of patient's entry to the study

• Tooth width using CBCT images.

  For the anterior teeth: (centrals, laterals and canines) On the cross section \& frontal section: Maximum mesiodistal width of each crown (from the first molar to the first molar of each jaw) has been measured between the anatomic contact point. The result is expressed in mm. For the posterior teeth: (premolars and first molars) On the cross section \& sagittal section: Maximum mesiodistal width of each crown (from the first molar to the first molar of each jaw) has been measured between the anatomic contact point. The result is expressed in mm. This method was adopted to obtain the true width of each tooth, regardless of its position within the dental arch.

  After seven days of taking the CBCT scans for both jaws. CBCT images have been taken in the same day of patient's entry to the study.

• Tooth width using IOS images.

  Digital images have been opened in the software, and Maximum mesiodistal width of each crown (from the first molar to the first molar of each jaw) has been measured between the anatomic contact point using the "Diagnostics" tool.

  After seven days of scanned with the Intraoral scanner for both jaws. IOS images have been taken in the same day of patient's entry to the study

• Anterior Bolton' ratio using plaster models.

  Bolton analysis is used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formula, the partial ratio should be 77.2% (±1.65) The formula is the sum of the mesio-distal widths of the lower six anterior teeth divided by the sum of the mesio-distal widths of the upper six anterior teeth.

  After seven days of taking the impressions of the dental arches. Silicon Impressions have been taken in the same day of patient's entry to the study

• Anterior Bolton' ratio using CBCT images.

  Bolton analysis is used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formula, the partial ratio should be 77.2% (±1.65) The formula is the sum of the mesio-distal widths of the lower six anterior teeth divided by the sum of the mesio-distal widths of the upper six anterior teeth.

  After seven days of taking the CBCT scans for both jaws. CBCT images have been taken in the same day of patient's entry to the study.

• Anterior Bolton' ratio using IOS images.

  Bolton analysis is used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formula, the partial ratio should be 77.2% (±1.65) The formula is the sum of the mesio-distal widths of the lower six anterior teeth divided by the sum of the mesio-distal widths of the upper six anterior teeth.

  After seven days of scanned with the Intraoral scanner for both jaws. IOS images have been taken in the same day of patient's entry to the study

• Overall Bolton' ratio using plaster models.

  Bolton analysis is used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formula, the overall ratio should be 91.3%. The formula is the sum of the mesio-distal widths of the lower twelve teeth divided by the sum of the mesio-distal widths of the upper twelve teeth.

  After seven days of taking the impressions of the dental arches. Silicon Impressions have been taken in the same day of patient's entry to the study

• Overall Bolton' ratio using CBCT images.

  Bolton analysis is used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formula, the overall ratio should be 91.3%. The formula is the sum of the mesio-distal widths of the lower twelve teeth divided by the sum of the mesio-distal widths of the upper twelve teeth.

  After seven days of taking the CBCT scans for both jaws. CBCT images have been taken in the same day of patient's entry to the study.

• Overall Bolton' ratio using IOS images.

  Bolton analysis is used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formula, the overall ratio should be 91.3%. The formula is the sum of the mesio-distal widths of the lower twelve teeth divided by the sum of the mesio-distal widths of the upper twelve teeth.

  After seven days of scanned with the Intraoral scanner for both jaws. IOS images have been taken in the same day of patient's entry to the study

Study Arms (1)

Malocclusion patients

Patients with different types of malocclusion will be included. Plaster models will be fabricated after pouring the impressions with hard gypsum. All patients have been undergoing CBCT scans for both jaws. Then, intraoral scanned of the dental arches of each patient have been taken using an intraoral scanner. Then measurements were made on digital images (CBCT \& IOS) and on plaster models.

Diagnostic Test: Plaster models; Diagnostic Test: CBCT images; Diagnostic Test: IOS images

Interventions

Plaster models DIAGNOSTIC_TEST

The impressions taken of the dental arches will be poured with hard gypsum in order to make use of the models for taking measurements. These measurements will be considered the gold standard.

Also known as: Study models, Study casts, Poured study models

Malocclusion patients

CBCT images DIAGNOSTIC_TEST

All patients have been undergoing CBCT scans for both jaws

Also known as: cone beam computed tomography images.

Malocclusion patients

IOS images DIAGNOSTIC_TEST

The patient's teeth have been dried with air syringe and scanned with the Intraoral scanner

Also known as: intra oral scanner images

Malocclusion patients

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)
• Sampling Method: Probability Sample

Study Population

Patients with different levels of malocclusion

You may qualify if:

• Age between 18 and 35 years.
• Full permanent dentition from right first molar to left first molar in both upper and lower arches.
• Participants should not be under orthodontic treatment.

You may not qualify if:

• Tooth agenesis or extractions.
• Presence of large restorations that could change the mesiodistal diameters of the teeth.
• Teeth with anomalous shapes.
• Teeth with large carious lesions.
• Enamel defects that affect the morphology of crown.
• Severe crowding in the dentition (\< 6 mm).
• Missing or heavily restored teeth.
• Teeth with large carious lesions / enamel defects that affect the morphology of crown/

Sponsors & Collaborators

• University of Duhok: lead

Study Sites (1)

Mohamad Radwan Sirri

Duhok, Iraq

Location

Related Publications (5)

• Kim J, Lagravere MO. Accuracy of Bolton analysis measured in laser scanned digital models compared with plaster models (gold standard) and cone-beam computer tomography images. Korean J Orthod. 2016 Jan;46(1):13-9. doi: 10.4041/kjod.2016.46.1.13. Epub 2016 Jan 25.

  PMID: 26877978 RESULT

• Paredes V, Gandia JL, Cibrian R. Determination of Bolton tooth-size ratios by digitization, and comparison with the traditional method. Eur J Orthod. 2006 Apr;28(2):120-5. doi: 10.1093/ejo/cji077. Epub 2005 Dec 22.

  PMID: 16373454 RESULT

• Wiranto MG, Engelbrecht WP, Tutein Nolthenius HE, van der Meer WJ, Ren Y. Validity, reliability, and reproducibility of linear measurements on digital models obtained from intraoral and cone-beam computed tomography scans of alginate impressions. Am J Orthod Dentofacial Orthop. 2013 Jan;143(1):140-7. doi: 10.1016/j.ajodo.2012.06.018.

  PMID: 23273370 RESULT

• Kumar AA, Phillip A, Kumar S, Rawat A, Priya S, Kumaran V. Digital model as an alternative to plaster model in assessment of space analysis. J Pharm Bioallied Sci. 2015 Aug;7(Suppl 2):S465-9. doi: 10.4103/0975-7406.163506.

  PMID: 26538899 RESULT

• Alam MK, Shahid F, Purmal K, Ahmad B, Khamis MF. Bolton tooth size ratio and its relation with arch widths, arch length and arch perimeter: a cone beam computed tomography (CBCT) study. Acta Odontol Scand. 2014 Nov;72(8):1047-53. doi: 10.3109/00016357.2014.946967. Epub 2014 Sep 15.

  PMID: 25220521 RESULT

MeSH Terms

Conditions

Malocclusion

Condition Hierarchy (Ancestors)

Tooth Diseases; Stomatognathic Diseases

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: CROSS SECTIONAL
• Target Duration: 6 Months
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Study Director-Iraq-Duhok

Study Record Dates

• First Submitted: January 24, 2023
• First Posted: February 2, 2023
• Study Start: October 10, 2021
• Primary Completion: June 29, 2022
• Study Completion: December 25, 2022
• Last Updated: November 28, 2023

Record last verified: 2023-11

Locations

IR (1)