The accuracy of biomechanical mechanisms for dental deep bite correction using the Invisalign system

	Mean	SD	95% CI
T0 OVB (mm)	4.66	0.86	4.32–4.99
ST1 OVB (mm)	1.91	0.71	1.63–2.19
ET1 OVB (mm)1	3.34	0.85	3.00–3.67
ST1-T0 OVB (mm)	2.74	0.81	2.42–3.06
ET1-T0 OVB (mm)	1.32	0.58	1.09–1.55
Accuracy (%)	48.61	19.22	41.07–56.14

1 ET1 OVB, post-treatment overbite; ET1-T0 OVB, clinically achieved overbite correction; ST1 OVB, overbite correction simulated on Clincheck; ST1-T0 OVB, predicted overbite correction; T0 OVB, pre-treatment overbite.

Table III.

Comparison between pre-treatment overbite (T0) and simulated overbite (ST1) planned on the ClinCheck

Groups	T0 OVB (mm)	ST1 OVB (mm)	P value
Groups	Mean ± SD (95% CI)	Mean ± SD (95% CI)	P value
Moderate	4.27 ± 0.42 (4.07–4.46)	2.39 ± 0.63 (2.10–2.68)	<0.001^**
Severe	5.67 ± 0.88 (5.02–6.32)	3.64 ± 0.47 (3.30–3.99)	<0.001^**

1 *p < 0.05,

1 **p < 0.01,

1 n.s. p > 0.05.

Table IV.

Accuracy of the overbite correction

Groups	T0-ST1 OVB (mm)	T0-ET1 OVB (mm)	ST1-ET1 (mm)	P value	Accuracy (%)
Groups	Mean ± SD (95% CI)	Mean ± SD (95% CI)	Mean ± SD (95% CI)	P value	Mean ± SD (95% CI)
Moderate	2.39 ± 0.63 (2.10–2.68)	1.24 ± 0.59 (0.97–1.52)	1.15 ± 0.6 (0.87–1.43)	<0.001^**	51.35 ± 21 (41.65–61.05)
Severe	3.64 ± 0.47 (3.30–3.99)	1.53 ± 0.5 (1.16–1.90)	2.11 ± 0.4 (1.82–2.41)	<0.001^**	41.56 ± 10.81 (33.55–49.05)

1 *p < 0.05,

1 **p #x003C; 0.01,

1 n.s. p > 0.05.

Table V.

Spearman’s correlation coefficient between the predicted overbite correction and the prediction accuracy

	Spearman’s correlation coefficient	P-value
Moderate	0.08	0.76
Severe	0.29	0.53
Total	-0.07	0.74

1 *p < 0.05, **p < 0.01, n.s. p > 0.05.

Table VI.

Association between overbite severity and accuracy

	Moderate	Severe	P-value
	Mean ± SD (95% CI)	Mean ± SD (95% CI)	P-value
T0 OVB	4.27 ± 0.42 (4.07–4.46)	5.67 ± 0.88 (5.02–6.32)	0.023^*
T0-ST1 OVB	2.39 ± 0.63 (2.10–2.68)	3.64 ± 0.47 (3.30–3.99)	0.046^*
T0-ET1 OVB	1.24 ± 0.59 (0.97–1.52)	1.53 ± 0.5 (1.16–1.90)	0.61
Accuracy	51.35 ± 21 (41.65–61.05)	41.56 ± 10.81 (33.55–49.05)	0.61

1 *p < 0.05,

1 **p < 0.01,

1 n.s. p > 0.05.

Table VII.

Correlation between the nature of planned bite opening mechanisms in the ClinCheck and prediction accuracy

		N	Mean accuracy (%)	SD	CI 95%	P-value
U1 intrusion	Present	19	46.57	17.95	38.50– 54.64	0.66
	Absent	6	55.07	21.55	37.82– 72.32
L1 intrusion	Present	24	47.78	19.18	40.11– 55.46	/
	Absent	1	68.42	/	68.42- 68.42
Upper posterior extrusion	Present	10	53.04	18.83	41.37– 64.71	0.7
	Absent	15	45.66	18.92	36.08– 55.23
Lower posterior extrusion	Present	10	58.25	22.06	44.57– 71.92	0.37
	Absent	15	42.18	13.72	35.24– 49.13
U1 proclination	Present	8	53.79	17.94	41.35– 66.22	0.69
	Absent	17	46.17	19.33	36.99– 55.36
L1 proclination	Present	17	52.08	20.56	42.30– 61.85	0.57
	Absent	8	41.24	13.31	32.02– 50.47

1 *p < 0.05, **p < 0.01, n.s. p > 0.05.

1 L1, lower incisors; U1, upper incisors..

Table VIII.

Correlation between the number of opening bite mechanisms and the overbite correction

	1 or 2 (N = 4)	3 or 4 (N = 20)	5 or 6 (N = 1)	P-value
	Mean ± SD	Mean ± SD	Mean ± SD	P-value
ST1-T0 OVB(mm)	1.90 ± 0.93	2.94 ± 0.73	2.3	0.057
ET1-T0 OVB (mm)	0.88 ± 0.62	1.38 ± 0.55	2.1	0.125

1 * p<0.05; ** p<0.01; n.s. p>0.05.

Table IX.

Mean overbite correction and frequency of the attachments number on lower premolars and molars

	2 att (N = 1)	4 att (N = 3)	5 att (N = 1)	6 att (N = 16)	7 att (N = 1)	8 att (N = 3)	P-value
	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	P-value
T0-ST1	2.20 /	2.60 ± 0.65	2.20 /	2.68 ± 0.84	3.90 /	3.23 ± 1.14	0.54
T0-ET1	1.10 /	1.40 ± 0.48	0.70 /	1.26 ± 0.62	1.20 /	1.87 ± 0.68	0.56

1 *p < 0.05, **p < 0.01, n.s. p > 0.05.

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DOI: https://doi.org/10.2478/aoj-2024-0024 | Journal eISSN: 2207-7480 | Journal ISSN: 2207-7472

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Language: English

Page range: 87 - 95

Submitted on: May 1, 2024

Accepted on: Sep 1, 2024

Published on: Jan 22, 2025

Published by: Australian Society of Orthodontists Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Related subjects:

Medicine,

Basic medical science,

Basic medical science, other

© 2025 Gianluigi Fiorillo, Alessandra Campobasso, Lorenzo Garrisi, Giovanni Battista, Vincenzo D’Antò, Alice Mandelli, Gualtiero Mandelli, Alessandro Ambrosi, Giorgio Gastaldi, published by Australian Society of Orthodontists Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 40 (2024): Issue 2 (July 2024)