Three-dimensional computer-assisted study model analysis of long-term oral-appliance wear. Part 1: Methodology

Chen, Hui; Lowe, Alan A.; Almeida, Fernanda R.; Wong, Mary; Fleetham, John A.; Wang, Bangkang

doi:10.1016/j.ajodo.2006.10.030

Cited by 33 publications

(22 citation statements)

References 31 publications

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“…In the present study, the occlusal alterations of five longterm OA cases were evaluated with a newly developed 3D dental study model analysis system [11]. Model analysis was the primary method for the case evaluation, with additional polysomnographic (PSG) and lateral cephalometric analysis for two of the five cases.…”

Section: Introductionmentioning

confidence: 99%

Dental changes evaluated with a 3D computer-assisted model analysis after long-term tongue retaining device wear in OSA patients

Chen

Lowe

Strauss³

et al. 2007

Sleep Breath

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Oral appliances (OAs) have been used to treat obstructive sleep apnea (OSA) patients for decades. However, detailed dental side effects in long-term OA cases analyzed with an accurate three-dimensional (3D) measurement tool have seldom been reported. The purpose of this study is to evaluate dental side effects in five OSA patients, who had used a tongue retaining device (TRD) (with occasional other OA wear) for an average of 6 years and 4 months. The baseline and follow-up orthodontic study models were measured with a newly developed MicroScribe-3DX analysis system. High compliance of TRD wear was confirmed in all cases and different patterns and amounts of dental changes were observed. The most common appliance-induced dental changes included anterior and/or unilateral posterior open-bites and reduced anterior overjets. It was hypothesized that there might be two possible mechanisms for the TRD side effects--one is the forward pressure of the tongue upon the anterior dental arch and the other is the lateral pressure of the tongue upon the posterior arch. Considerations to correct the TRD dental side effects should be guided by these different mechanisms of the tongue on the dental arch. Possible solutions to minimize occlusal changes and maximize the benefits for OSA patients are also discussed.

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Section: Introductionmentioning

confidence: 99%

Dental changes evaluated with a 3D computer-assisted model analysis after long-term tongue retaining device wear in OSA patients

Chen

Lowe

Strauss³

et al. 2007

Sleep Breath

Self Cite

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“…Cronbach's coefficient for intraobserver and interobserver reliability of the 3D digitizer was 0.92 for both, which indicates high internal consistency [11]. Furthermore, reproducibility of measuring bone or spatial landmarks using the 3D digitizer device is high and is an easy-to-operate apparatus [12][13][14].…”

Section: Introductionmentioning

confidence: 90%

Three-dimensional motion analysis of the 2nd cervical spinous process at end range cervical rotation in different scapular positions using 3D digitizer

Otsudo

Akasaka

Hattori

et al. 2018

Annals of Physical and Rehabilitation Medicine

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Objective. The study used a 3D digitizer to determine three-dimensional motion analysis of the 2nd cervical (C2) spinous process at end range cervical rotation with the scapula in different positions. Methods. 30 healthy adults participated in this study. Different scapula positions were adopted bilaterally and positioned passively at normal resting, depression, adduction, and abduction. Under each scapula position, bilateral end range cervical rotation and displacement of the C2 spinous process were analyzed by a 3D digitizer. Results. Displacement of the C2 spinous process relative to the occiput was significantly correlated with range of cervical rotation under all scapular positions (p<0.05). However, there were no significant differences between end range cervical rotation and displacement of the C2 spinous process relative to the occiput in any scapular position. Conclusion. These results suggest that measurement of upper cervical mobility using the 3D digitizer is a reliable method that holds promise in the evaluation of people with cervical spine disorders.

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“…This suggests that crowding will occur with time especially in mandibular arch 6) , regardless of orthodontic treatment 4) . In this study, the dental casts were digitized with a 3-D laser scanner (VMS-100F) to construct 3-D images according to the method of earlier studies 5,8,9) . The image is composed of dots, termed a "cloud", and is easy to expand to confirm reference points or lines.…”

Section: Resultsmentioning

confidence: 99%

“…1). The dental casts were digitized with a 3-D laser scanner (VMS-100F, UNISN INC., Osaka, Japan) to construct 3-D images 5,8,9) ( Fig. 2).…”

Section: Methodsmentioning

confidence: 99%

Mesio-distal Tooth Angulation in Elderly with Many Remaining Teeth Observed by 3-D Imaging

Fuma

Motegi

Fukagawa

et al. 2010

Bull. Tokyo Dent. Coll.

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Few studies have investigated the morphologic characteristics of teeth, dental arches and occlusion in elderly persons with many remaining teeth. The purpose of this study was to establish a method of measurement using 3-D imaging to investigate tooth angulation in the elderly from the orthodontic point of view. The dental casts of 20 elderly persons with many remaining teeth were digitized with a 3-D laser scanner (VMS-100F, UNISN INC., Osaka, Japan) to construct 3-D images. The mesio-distal angulation of each tooth was then measured with analytical software (SURFLACER, UNISN INC. and IMAGEWARE 12, UGS PLM Solutions, MO, USA). The occlusal plane formed by the incisal edge of the central incisor and distal buccal cusp tip of the first molar on either side was used as a reference plane for measurements. Mesio-distal tooth angulation (indicated in degrees) of maxillary teeth in this subjects averaged 1.26 for central incisors, 5.46 for lateral incisors, 7.84 for canines, 6.59 for first premolars, 5.78 for second premolars, 1.64 for first molars and ‫71.4מ‬ for second molars. Average values for mandibular teeth were 0.91 for central incisors, 2.35 for lateral incisors, 7.04 for canines, 8.76 for first premolars, 10.44 for second premolars, 7.33 for first molars and 12.67 for second molars. There was no statistical difference between the data in man and women except maxillary second molar (pϽ0.05). Mesial angulation in the mandibular arch showed a progressive increase from the anterior to the posterior. However, this tendency was not observed in the maxillary arch.

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Three-dimensional computer-assisted study model analysis of long-term oral-appliance wear. Part 1: Methodology

Cited by 33 publications

References 31 publications

Dental changes evaluated with a 3D computer-assisted model analysis after long-term tongue retaining device wear in OSA patients

Dental changes evaluated with a 3D computer-assisted model analysis after long-term tongue retaining device wear in OSA patients

Three-dimensional motion analysis of the 2nd cervical spinous process at end range cervical rotation in different scapular positions using 3D digitizer

Mesio-distal Tooth Angulation in Elderly with Many Remaining Teeth Observed by 3-D Imaging

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