Thickness and marking quality of different occlusal
					contact registration strips

The following OCRS were selected: Accufilm II, BK20, BK21, BK22, BK23, BK28, and BK31. The thickness was measured in three points of the OCRS with an electronic measuring device (TESA), and the mean was calculated. To produce the marks on the strips, composite resin specimens were adapted to a universal testing machine (Versat 2000) with 40 kgf load cell at a speed of 1.0 mm/min. The mark images were photographed with a stereoscopic microscope (Stemi SV11) and processed and analyzed by the 550-Leica Qwin^®analyzer.

Results

Values (μm) found in the 1^st and 2^nd thickness measurements were: Accufilm II - 16.4 and 14.2; BK20 - 10.0 and 8.1; BK21 - 9.5 and 8.0; BK22 - 9.7 and 8.7; BK23 - 9.8 and 7.9; BK28 - 12.8 and 10.0; and BK31 - 8.4 and 8.0, respectively. The mean (mm²) values found in the mark areas were: Accufilm II - 0.078; BK20 - 0.035; BK21 - 0.045; BK22 - 0.012; BK23 - 0.022; BK28 - 0.024; and BK31 - 0.024. The results were submitted to the Kruskal-Wallis (p<0.05) and Pearson’s correlation tests.

Conclusions

Only in the 2^nd measurement, the OCRS thickness observed was similar to the value indicated by the manufacturers; the Accufilm II and the BK28 strips showed the better marks; and no correlation was found between the thickness and the marking area.

Dental occlusion; Occlusal adjustment; Prosthodontics; Dentistry; Oral diagnosis

	Measurement		Measurement		Measurement		Measurement		Measurement		Measurement		Measurement		Measurement		Measurement
	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd
p	1		2		3		4		5		6		7		8		9
2	0.3164	0.5249	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3	0.1837	0.5922	0.7432	0.2414	-	-	-	-	-	-	-	-	-	-	-	-	-	-
4	0.0218*	0.1573	0.1967	0.4363	0.3353	0.0512	-	-	-	-	-	-	-	-	-	-	-	-
5	0.0125*	0.0016*	0.0005*	0.0002*	0.0001*	0.0089*	0.0000*	0.0000*	-	-	-	-	-	-	-	-	-	-
6	0.0004*	0.0009*	0.0000*	0.0001*	0.0000*	0.0052*	0.0000*	0.0000*	0.3053	0.8593	-	-	-	-	-	-	-	-
7	0.0038*	0.0259	0.0001*	0.0042*	0.0000*	0.0907	0.0000*	0.0003*	0.6886	0.3550	0.5324	0.2704	-	-	-	-	-	-
8	0.0110*	0.0005*	0.0004*	0.0000*	0.0001*	0.0030*	0.0000*	0.0000*	0.9631	0.7229	0.3277	0.8593	0.7229	0.2007	-	-	-	-
9	0.4409	0.0878	0.0763	0.0191	0.0357*	0.2414	0.0022*	0.0018*	0.0843	0.1484	0.0059*	0.1047	0.0334*	0.6029	0.0763	0.0719	-	-
10	0.0001*	0.0009*	0.0000*	0.0001*	0.0000*	0.0055	0.0000*	0.0000*	0.1452	0.8714	0.6660	0.9877	0.2910	0.2771	0.1584	0.8472	0.0015*	0.1081

p	1	2	3	4	5	6	7	8	9
2	0.1607	-	-	-	-	-	-	-	-
3	0.3987	0.5763	-	-	-	-	-	-	-
4	0.7933	0.254	0.5606	-	-	-	-	-	-
5	0.005*	0.1607	0.0498*	0.011*	-	-	-	-	-
6	0.0744	0.7028	0.3471	0.128	0.3071	-	-	-	-
7	0*	0.0008*	0.0001*	0*	0.0516	0.003*	-	-	-
8	0.0003*	0.0262*	0.0054*	0.0008*	0.4117	0.0655	0.2605	-	-
9	0.3108	0.6971	0.8654	0.4524	0.0731	0.4409	0.0002*	0.009*	-
10	0.0004*	0.035*	0.0077*	0.0012*	0.4807	0.0843	0.2146	0.908	0.0125*

Faculdade De Odontologia De Bauru - USP Serviço de Biblioteca e Documentação FOB-USP, Al. Dr. Octávio Pinheiro Brisolla 9-75, 17012-901 Bauru SP Brasil, Tel.: +55 14 32358373 - Bauru - SP - Brazil
E-mail: jaos@usp.br

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[1] Corresponding address: Sigmar de Mello Rode - Departmento de Materiais Odontológicos e Prótese - Instituto de Ciência e Tecnologia - Univ. Estadual Paulista (UNESP) - R. Eng Francisco José Longo, 777 - Jardim São Dimas - São José dos Campos - SP - Brazil - 12245-000 - e-mail: sigmarrode@uol.com.br