Effect of Magnification on the Precision of Tooth Preparation in Dentistry.

Eichenberger, Martina; Biner, N; Amato, M; Lussi, Adrian; Perrin, Martina (2018). Effect of Magnification on the Precision of Tooth Preparation in Dentistry. Operative dentistry, 43(5), pp. 501-507. Operative Dentistry, Inc. 10.2341/17-169-C

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OBJECTIVES   To evaluate the impact of magnification aids on the precision of tooth preparation under simulated clinical conditions. METHODS AND MATERIALS   Two plastic blocks marked with a geometric shape were fixed in a dental phantom head: a circle as the distal surface of tooth 16 (UNS 3) and a y-shaped figure as the occlusal surface of tooth 36 (UNS 19). Sixteen dentists (mean age: 39 years; range: 26-67 years) prepared the geometric shapes from the inside to the boundary line with a cylindrical bur and water-cooling. The boundary line had to be touched but not erased. Chair-side assistance was provided to simulate the clinical situation. Tooth 16 was prepared under indirect vision via a dental mirror. Tooth 36 was prepared under direct vision A) without magnification aids, B) with Galilean loupes, 2.5× and light-emitting diode light, and C) with a microscope, 6.4× and coaxial light. The preparation procedure was performed three times in different sequences of the magnification devices and with a break of at least 1 week between each procedure. The correctly prepared contour and the incorrectly prepared areas were evaluated in relation to the whole circumference of the geometric shapes. RESULTS   For both values the precision was significantly higher when a microscope was used, followed by preparation using loupes; precision was lowest without magnification aids ( p<0.0001). This was true for both indirect and direct vision ( p<0.05). CONCLUSIONS   Magnification devices improved the precision of tooth preparation under simulated clinical conditions.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry

UniBE Contributor:

Eichenberger, Martina; Lussi, Adrian and Perrin, Martina

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0361-7734

Publisher:

Operative Dentistry, Inc.

Language:

English

Submitter:

Hendrik Meyer-Lückel

Date Deposited:

07 Mar 2019 09:26

Last Modified:

07 Mar 2019 09:26

Publisher DOI:

10.2341/17-169-C

PubMed ID:

29513642

URI:

https://boris.unibe.ch/id/eprint/125268

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