Ueda et al.

Asian Pac J Dent 2015; 15: 1-2

Erratum

Erratum to “Evaluation of occlusal relationship reproducibilitywith CAD/CAM techniques”(Asian Pac J Dent 2014; 14(2): 35-40.)

Yoji Ueda, DDS,a Daizo Okada, DDS, PhD,a Reiko Ogura, DDS, PhD,a Wataru Komada,DDS, PhD,a Shiho Otake, DDS, PhD,a Masaomi Ikeda, RDT, BSc, PhD,b and Hiroyuki
Miura, DDS, PhDa
aFixed Prosthodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical andb
Dental University, and Clinical Oral Science, Department of Oral Health Care Sciences, Faculty ofDentistry, Tokyo Medical and Dental University, Tokyo, Japan

Materials and Methods
Nine subjects (six male and three female subjects; mean age, 29.2±2.4 years) who had complete naturaldentition except for the third molars and no symptoms of stomatognathic disorders were recruited for this study.
All subjects provided informed consent to participate in this study.
subject were the subject teeth in this study.

The maxillary right first molars of each

The research protocol was approved by the Research Ethics

Committee of the Tokyo Medical and Dental University (Approval No. 717. 2011).
The surfaces of the subject tooth and adjacent teeth were air-dried, then sprayed with titanium oxide powder(Cerec Optispray, Sirona, Bensheim, Germany) uniformly.

Optical impressions were taken using an intraoral

camera (Cerec Blue-CAM, Sirona) and recorded via CAD software (Cerec AC, Sirona).
were performed six times (P1-P6).
(Q).

These procedures

An optical impression of each antagonist was taken and recorded only once

For optical bite registration, optical impressions from the buccal side during clenching with moderate

biting force at the intercuspal position were taken using the intraoral camera and recorded via CAD software.
These procedures were performed six times (BS1-BS6).

The occlusal contact regions obtained by opticalimpressions and optical bite registration were represented using CAD software.

The occlusal contact regions

were divided into several groups based on the distance between the maxillary and mandibular occlusal surface;specifically, light-blue-colored regions (within 100 µm of the close contact, A), green-colored regions (0-50 µmof the penetrated contact, B), yellow-colored regions (50-100 µm of the penetrated contact, C), and red-coloredregions (over 100 µm of the penetrated contact, D) (Fig. 1).
The occlusal contact regions data were recorded on a computer and the areas of each occlusal contact
region of the subject tooth were calculated using image-processing software (Win Roof, Mitani Corp., Fukui,Japan).

The area of the occlusal contact region A (“clearance”) and the total area of the occlusal contact

regions B, C, and D (“penetration”) were calculated.

On CAD software (but never in the actual dentition invivo), the occlusal surfaces of the maxillary and mandibular teeth overlapped at the occlusal contact regions B, C,and D.

The mean values of the areas of clearance and penetration of P1, Q with BS1, P1, Q with BS2, and soon up to P1, Q with BS6 were calculated (mP1).

The mean values of the areas of clearance and penetration

were calculated in the same way for P2-P6 (mP2-mP6).
mean values of mP1-mP6 was calculated.

Then, each absolute value of the deviation from theThe mean values of the sum of each absolute value were defined as1

Ueda et al.

Asian Pac J Dent 2015; 15: 1-2

the variability of the areas of clearance and penetration depending on changes in the optical impressions.

Next,

the mean values of the areas of clearance and penetration of P1, Q with BS1, P2, Q with BS1, and so on up to P6,
Q with BS1 were calculated (mBS1).

The mean values of the areas of clearance and penetration were also

calculated in the same way for BS2-BS6 (mBS2-mBS6).
mean values of mBS1-mBS6 was calculated.

Then, each absolute value of the deviation from theThe mean values of the sum of each absolute value were definedas the variability of the areas of clearance and penetration depending on changes in optical bite registration.
The variabilities derived from changes in the optical impressions were compared with those derived fromchanges in optical bite registration.

The difference in the variabilities derived from changes in the twoapproaches was statistically analyzed using the Wilcoxon signed-rank test, and p<0.05 was deemed to indicate
statistical significance.

The first and third paragraphs were omitted.
The publisher regrets the errors.

Copyright ©2015 by the Asian Pacific Journal of Dentistry.

2(Asian Pac J Dent 2015; 15(1): 1-2.)
January 1, 2015.
Online ISSN 2185-3487, Print ISSN 2185-3479