Cut-out-Rescan Procedure Under Rubber-Dam Isolation

Summary

Aim: This clinical study investigated the effect of the "cut-out-rescan" procedure under rubber dam isolation on restorative scanning trueness of four intraoral scanners.

Materials and Methods: The initial scans were collected from 20 patients using 4 dental intraoral scanners (Trios 3, 3Shape; Cerec Primescan, Dentsply Sirona; iTero Element 5D, Align; iTero Lumina, Align). The 3-dimensional data was obtained from the right or left side of the mandibula between the canine-to-2nd molar area and recorded in .stl format. Then the 2nd premolar was cut with the cutting tool in the related scanner software in a range including 1mm from the adjacent teeth. The determined area was clinically isolated with the rubber-dam and the same quadrant was rescanned to let the software overlap with the cut-out area. The overlapped scan was recorded in .stl format as the second scan data. The first and second scan data from the 4 scanners were then transferred to the Oracheck (Dentsply Sirona) software program and digitally overlapped to measure the conformity. The deviations detected in the 1st premolar, 2nd premolar, and 1st molar were selectively and jointly assessed in distance (mm) and volume (mm3) for every scanner data. Robust ANOVA and Kruskal Wallis tests were used for the statistical analyses and the significance level was set at \<.050.

Conditions

• Trueness
• Intraoral Scanner
• Rubberdam

Interventions

DEVICE

Taking images from the right lower jaw with an intraoral scanner

The patients' mandibular arches were scanned with 4 different intraoral scanners (IOS) (Trios 3, 3Shape; Primescan, Dentsply; Element 5D, iTero; Lumina, iTero) prior to the procedure, and the obtained digital impressions were stored as a standard tessellation language (STL) file. The 2nd premolar, 1st, and 2nd molar teeth were isolated with a rubber dam (medium; Nic Tone, Manufacturera Dental Continental) to be included in the operation field. Clamps were placed on the 2nd premolar and 2nd molar teeth. Subsequently, the mesh hole area was rescanned starting on the occlusal surface of the second molar, moving toward the occlusal of the first molar to the occlusal of the second premolar, then the buccal surfaces of the second premolar, followed by the first molar and second molar.

PROCEDURE

Clamp placement on canine and 2nd molar teeth and rubberdam rubber band insertion

The 2nd premolar, 1st, and 2nd molar teeth were isolated with a rubber dam (medium; Nic Tone, Manufacturera Dental Continental) to be included in the operation field. Clamps were placed on the 2nd premolar and 2nd molar teeth. It was aimed to facilitate the second scanning process by expanding the isolation area to include 3 teeth. A flowable composite was applied by placing Teflon tape on the occlusal surface of the 1st molar to create a difference in its morphology.

Sponsors & Collaborators

• Marmara University

  lead OTHER

Principal Investigators

• Bora Korkut, Associate Professor · Marmara University

• Ayse Asli Senol, Asisstant Professor · Marmara University

• Cevdet Can Saygılı, Research Assistant · Marmara University

• Bengü Doğu Kaya, Research Asisstant · Marmara University

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Model

SINGLE_GROUP

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2024-10-01

Primary Completion

2024-10-05

Completion

2024-10-20

Countries

• Turkey (Türkiye)

Study Locations