1 06, 2023

Torque control with set-up and auxiliary spring in an adult severe class II case treated by lingual straight-wire appliance, premolar extractions and orthognathic surgery

2023-06-01T05:10:06+00:00

Int Orthod. 2023 May 29;21(3):100776. doi: 10.1016/j.ortho.2023.100776. Online ahead of print.

ABSTRACT

This case report describes a complex full-step class II high angle case in an adult patient treated with lingual straight-wire appliance, premolar extractions and orthognathic surgery. With the twofold aim of obtaining ideal occlusal relationship and aesthetic improvement, surgical treatment with appropriate biomechanical strategies, including extraction choice and torque control during space closure, are needed to achieve the planned results. This case report demonstrates the possibility of solving successfully severe sagittal, transverse and vertical discrepancies in an adult patient with surgical treatment by means of an invisible technique. This report also underlines the need for precise biomechanical control, including set-up overcorrections and an auxiliary spring to manage teeth inclination, in lingual orthodontics extraction cases.

PMID:37257395 | DOI:10.1016/j.ortho.2023.100776

Torque control with set-up and auxiliary spring in an adult severe class II case treated by lingual straight-wire appliance, premolar extractions and orthognathic surgery2023-06-01T05:10:06+00:00
21 01, 2023

Non-surgical occlusal plane cant resolution with lingual straight-wire appliance and miniscrews in a class II asymmetric adult patient

2023-01-21T16:55:19+00:00

Int Orthod. 2023 Jan 18;21(1):100726. doi: 10.1016/j.ortho.2023.100726. Online ahead of print.

ABSTRACT

This case report describes a complex class II case with important maxillo-mandibular asymmetry in an adult patient treated with lingual straight-wire appliance. With the twofold aim of obtaining dramatic aesthetic improvement, since the patient refused surgical option, and ideal occlusal relationship, accurate set-up planification and biomechanical strategies with TADS for occlusal plane cant correction are needed to achieve the planned results. This case report demonstrates the possibility of solving successfully class II malocclusion with significant asymmetry in adult patient without surgery by means of an aesthetic appliance; on the other hand, it underlines the necessity of miniscrews and auxiliaries in order to obtain the best results.

PMID:36669459 | DOI:10.1016/j.ortho.2023.100726

Non-surgical occlusal plane cant resolution with lingual straight-wire appliance and miniscrews in a class II asymmetric adult patient2023-01-21T16:55:19+00:00
13 01, 2023

Invisible treatment of an asymmetric adult class II malocclusion related to unilateral upper lateral incisor agenesis with a straight wire lingual appliance, mini-screw and premolar extraction: A case report

2023-01-13T22:20:05+00:00

Int Orthod. 2023 Jan 5;21(1):100721. doi: 10.1016/j.ortho.2022.100721. Online ahead of print.

ABSTRACT

This case report describes a complex full-step class II malocclusion with unilateral upper lateral incisor agenesis in an adult patient treated with lingual straight-wire appliance and premolar extraction, with the two-fold aim of obtaining ideal occlusal relationship and smile aesthetic improvement. In view of this, it underlines how an appropriate treatment strategy, including extraction choice and anchorage control during space closure, is needed to achieve the planned results with a completely invisible lingual appliance combined with aesthetic veneers.

PMID:36610255 | DOI:10.1016/j.ortho.2022.100721

Invisible treatment of an asymmetric adult class II malocclusion related to unilateral upper lateral incisor agenesis with a straight wire lingual appliance, mini-screw and premolar extraction: A case report2023-01-13T22:20:05+00:00
24 11, 2022

Obstructive sleep apnoea syndrome and anatomical factors: possible correlations

2022-11-24T12:58:49+00:00

Sleep Sci. 2022 Oct-Dec;15(4):429-435. doi: 10.5935/1984-0063.20220074.

ABSTRACT

OBJECTIVES: The following retrospective study was devised with the aim of evaluating the correlation between OSAS and various anatomical factors.

MATERIAL AND METHODS: Thirty-seven patients over the age of 40 were analyzed, of which 19 were classified as OSAS cases and 18 as control cases. For each, 17 anatomical variables were identified and examined using Invivo Dental software on CBCT scans, WebCeph software on laterolateral teleradiographs, and Rhinoceros 6.0 software on dental casts.

RESULTS: A generalized linear model of all the anatomical factors identified only two statistically significant variables. Specifically, the total volume of the palate displayed a inverse correlation with OSAS, while the distance between the S point and the Go point (S-Go) exhibited a direct correlation with the disease.

CONCLUSION: The likelihood of an individual having OSAS appears to decrease as the volume of the palate increases but increase as the lingual measure S-Go increases.

PMID:36419816 | PMC:PMC9670767 | DOI:10.5935/1984-0063.20220074

Obstructive sleep apnoea syndrome and anatomical factors: possible correlations2022-11-24T12:58:49+00:00
6 11, 2022

Three-dimensional assessment of teeth first-, second- and third-order position in Caucasian and African subjects with ideal occlusion

2022-11-06T17:18:49+00:00

Prog Orthod. 2015;16:11. doi: 10.1186/s40510-015-0086-9. Epub 2015 May 26.

ABSTRACT

BACKGROUND: The aim of this study was to provide an updated version of Andrews’ seminal study by exploiting 3D software to analyse the tip, torque and in-out values of two groups of different racial and ethnic background.

METHODS: The analysis was conducted on one Caucasian group (30 individuals) and one of African origin (29). All subjects were adult, in normal occlusion and had no previous history of orthodontic treatment. Rhinoceros™ 3D modelling software was used to identify anatomical reference points, planes and axes and to make the appropriate measurements.

RESULTS: Compared to Andrews’ measurements, we found more positive coronal tip values in both African and Caucasian subjects, while the torque values we measured tended to be less negative in the posterior sectors than those reported by Andrews. We measured greater tip values in the lower jaw of Caucasian with respect to African subjects, particularly in the middle sectors.

CONCLUSIONS: Race and ethnicity have a strong influence on values of tip, torque and in-out. This is translated as a more positive tip in Caucasian subjects and a more positive torque in those of African descent (greater proclination of the incisors). Finally, with respect to the values reported by Andrews, we found a tendency to more positive mean tip (except for at the upper second molars and lower incisors) and less negative torque in the posterior sectors.

PMID:26061990 | PMC:PMC4442781 | DOI:10.1186/s40510-015-0086-9

Three-dimensional assessment of teeth first-, second- and third-order position in Caucasian and African subjects with ideal occlusion2022-11-06T17:18:49+00:00
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