Orthodontic T-Scan Applications

Handbook of Research on Computerized Occlusal Analysis Technology Applications in Dental Medicine - Advances in Medical Technologies and Clinical Practice ◽

10.4018/978-1-4666-6587-3.ch011 ◽

2015 ◽

pp. 523-561 ◽

Cited By ~ 2

Author(s):

Julia Cohen-Levy, DDS, MS, PhD

Keyword(s):

Orthognathic Surgery ◽

Tooth Movement ◽

Case Reports ◽

Force Distribution ◽

Fixed Appliance ◽

Occlusal Contact ◽

3 Dimensional ◽

Finishing Process ◽

Scan Data ◽

Occlusal Contact Pattern

This chapter reviews T-Scan use in Orthodontics, defines normal T-Scan recordings for orthodontically treated subjects versus untreated subjects, and explains T-Scan use in the case-finishing process. After orthodontic appliance removal changes in the occlusion result from “settling,” because teeth can move freely within the periodontium. Despite a post treatment, visually “perfect” Angle's Class I relationship, ideal occlusal contacts often do not result solely from tooth movement. Creating simultaneous and equal contacts following fixed appliance removal can be accomplished using T-Scan data to optimize the end-result occlusal contact pattern. The software's force distribution and timing indicators (the 2 and 3-Dimensional ForceViews, force percentage per tooth and arch half, the Center of Force, and the Occlusion and Disclusion Times) aid in obtaining an ideal occlusal force distribution during case-finishing. Several case reports highlight combining lingual orthodontic treatment with Orthognathic surgery, where each presented case utilized T-Scan data during active treatment and retention.

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Orthodontic Monitoring and Case Finishing With the T-Scan System

Advances in Medical Technologies and Clinical Practice - Handbook of Research on Clinical Applications of Computerized Occlusal Analysis in Dental Medicine ◽

10.4018/978-1-5225-9254-9.ch015 ◽

2020 ◽

pp. 1057-1124

Author(s):

Julia Cohen-Levy, DDS

Keyword(s):

Orthodontic Treatment ◽

Tooth Movement ◽

Treatment Plan ◽

Force Distribution ◽

Occlusal Force ◽

Fixed Appliance ◽

Occlusal Contact ◽

Occlusion Time ◽

Scan Data ◽

Occlusal Contact Pattern

This chapter reviews T-Scan use in orthodontics from diagnosis to case finishing, and then in retention, while defining normal T-Scan recording parameters for orthodontically-treated subjects versus untreated subjects. T-Scan use in the case-finishing process is also described, which compensates for changes in the occlusion that occur during “post-orthodontic settling,” as teeth move freely within the periodontium to find an equilibrium position when the orthodontic appliances have been removed. T-Scan implementation is necessary because, often, despite there being a post treatment, visually “perfect” angle's Class I relationship established with the orthodontic treatment, ideal occlusal contacts do not result solely from tooth movement. Creating simultaneous and equal force occlusal contacts following fixed appliance removal can be accomplished using T-Scan data to optimize the end-result occlusal contact pattern. The T-Scan software's force distribution and timing indicators (the two- and three-dimensional force views, force percentage per tooth and arch half, the center of force trajectory and icon, the occlusion time [OT], and the disclusion time [DT]), all aid the Orthodontist in obtaining an ideal occlusal force distribution during case-finishing. Fortunately, most orthodontic cases remain asymptomatic during and after tooth movement. However, an occlusal force imbalance or patient discomfort may occur along with the malocclusion that needs orthodontic treatment. Symptomatic cases require special documentation at the baseline, and careful monitoring throughout the entire orthodontic process. The clinical use of T-Scan in these “fragile” cases of patient muscle in-coordination, mandibular deviation, atypical pain, and/or TMJ idiopathic arthritis, are illustrated by several case reports. The presented clinical examples highlight combining T-Scan data recorded during case diagnosis, tooth movement, and in case finishing, with patients that underwent lingual orthodontics and orthognathic surgery, orthodontic treatment using clear aligners, or conventional fixed treatment with a camouflage treatment plan, which require special occlusal finishing (when premolars are extracted in only one arch).

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Non-extraction and multiloop edgewise technique versus orthognathic surgery and fixed appliance in adult class II patients: a cephalometric comparative study

Minerva Stomatologica ◽

10.23736/s0026-4970.19.04209-2 ◽

2019 ◽

Vol 68 (4) ◽

Author(s):

Marco Migliorati ◽

Sara Drago ◽

Irene Schiavetti ◽

Guglielmo Ramieri ◽

Giovanni Gerbino ◽

...

Keyword(s):

Comparative Study ◽

Orthognathic Surgery ◽

Class Ii ◽

Fixed Appliance

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Comparative Evaluation of Frictional forces between different Archwire-bracket Combinations

Orthodontic Journal of Nepal ◽

10.3126/ojn.v4i1.11307 ◽

2014 ◽

Vol 4 (1) ◽

pp. 22-28 ◽

Cited By ~ 1

Author(s):

Vinit Singh ◽

Swati Acharya ◽

Satyabrata Patnaik ◽

Smruti Bhusan Nanda

Keyword(s):

Stainless Steel ◽

Tooth Movement ◽

Testing Machine ◽

Frictional Resistance ◽

Nickel Titanium ◽

Orthodontic Bracket ◽

Fixed Appliance ◽

Beta Titanium ◽

Frictional Forces

Introduction: During sliding mechanics, frictional resistance is an important counterforce to orthodontic tooth movement; whichmust be controlled to allow application of light continuous forces.Objective: To investigate static and kinetic frictional resistance between three orthodontic brackets: ceramic, self-ligating, andstainless steel, and three 0.019×0.025” archwires: stainless steel, nickel-titanium, titanium-molybdenum.Materials & Method: The in vitro study compared the effects of stainless steel, nickel-titanium, and beta-titanium archwires onfrictional forces of three orthodontic bracket systems: ceramic, self-ligating, and stainless steel brackets. All brackets had 0.022”slots, and the wires were 0.019×0.025”. Friction was evaluated in a simulated half-arch fixed appliance on a testing machine. Thestatic and kinetic friction data were analyzed with 1-way analysis of variance (ANOVA) and post-hoc Duncan multiple rangetest.Result: Self-ligating (Damon) brackets generated significantly lower static and kinetic frictional forces than stainless steel (Gemini)and ceramic brackets (Clarity). Among the archwire materials, Beta-titanium showed the maximum amount of frictional forceand stainless steel archwires had the lowest frictional force.Conclusion: The static and kinetic frictional force for stainless steel bracket was lowest in every combination of wire.

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Changes in the Complexity of Orthodontic Treatment for Patients Referred to a Teaching Hospital

British Journal of Orthodontics ◽

10.1179/bjo.15.1.27 ◽

1988 ◽

Vol 15 (1) ◽

pp. 27-32 ◽

Cited By ~ 13

Author(s):

C. D. Stephens ◽

N. W. Harradine

Keyword(s):

General Practitioner ◽

Orthognathic Surgery ◽

Orthodontic Treatment ◽

Further Training ◽

Fixed Appliance ◽

Dental Hospital ◽

Orthodontic Patients ◽

Specialist Treatment ◽

Fixed Appliances ◽

Removable Appliance

The records of 200 orthodontic patients accepted for treatment by the Orthodontic Department of the Bristol Dental Hospital in 1977 were compared with 200 taken on in 1985 in order to determine whether there had been any change in the proportion of referred cases requiring more complex procedures. Within each sample, cases were categorized as follows: (a) suitable for removable appliance treatment by an undergraduate or general practitioner; (b) requiring simple one arch fixed appliance treatment such as might he attempted by a general practitioner after a period of further training; (c) needing specialist treatment such as full multibracketed fixed appliances or orthognathic surgery. It was found that there had been no change in the proportions of simple and complex cases referred during the 8-year period although the proportion of patients now receiving complex treatment had increased greatly. Possible explanations and implications are discussed.

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Upper Incisor Root Resorption during Stage II of the Begg Technique: Two Case Reports

British Journal of Orthodontics ◽

10.1179/bjo.5.1.47 ◽

1978 ◽

Vol 5 (1) ◽

pp. 47-50 ◽

Cited By ~ 16

Author(s):

A. M. Hall

Keyword(s):

Root Resorption ◽

Case Reports ◽

Stage Ii ◽

Fixed Appliance ◽

Apical Root Resorption ◽

Definite Factor

Two cases exhibiting upper incisor apical root resorption when using purely tipping movements with a fixed appliance technique are reported. Possible causes of resorption are discussed, but no definite factor was apparent in these cases.

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Validity of 3-dimensional reconstruction and simulation of mandibular movement and occlusal contact

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/j.ajodo.2009.12.015 ◽

2010 ◽

Vol 137 (2) ◽

pp. 156-157

Author(s):

Li Hongbo

Keyword(s):

Mandibular Movement ◽

Occlusal Contact ◽

3 Dimensional ◽

Dimensional Reconstruction

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Combining the Air Indexing Method With the T-Scan System to Detect and Quantify Cervical Dentin Hypersensitivity

Advances in Medical Technologies and Clinical Practice - Handbook of Research on Clinical Applications of Computerized Occlusal Analysis in Dental Medicine ◽

10.4018/978-1-5225-9254-9.ch011 ◽

2020 ◽

pp. 829-878

Author(s):

Thomas A. Coleman. DDS

Keyword(s):

Contact Force ◽

Case Reports ◽

Dentin Hypersensitivity ◽

Cervical Lesions ◽

Occlusal Contact ◽

Indexing Method ◽

Timing Data ◽

Clinical Benefits ◽

Analysis System ◽

Common Clinical Finding

This chapter introduces the air indexing method for detecting and quantifying cervical dentin hypersensitivity (CDH) as a companion to the T-Scan Occlusal Analysis System which evaluates force and timing values for occlusal contacts of teeth. This chapter will also highlight an evidence-based retrospective investigation undertaken between 1979 and 1996 that evaluated associations and/or correlations between diagnosed CDH and its resolution following occlusal adjustment. This retrospective's method described the detection, diagnosis, and treatment of the signs and/or symptoms of the common clinical finding amongst patients with CDH. Stress physics will illustrate how small occlusal contacts magnify the impact that applied occlusal contact force has on the cervical regions of teeth. This resultant cervical stress is etiologic for how non-carious cervical lesions (NCCLs) form and degrade tooth roots. This chapter also explains how biocorrosion from endogenous and exogenous sources produces loss of dentin's protective proteins, glycoproteins, and cementum, which add to the effects of applied occlusal force, thereby creating CDH symptoms and NCCLs. CDH appears resultant from the co-factors of occlusal forces that produce cervical stress, along with biocorrosion, that are both modified by occlusal surface friction. The air indexing method of CDH diagnosis is an objective diagnostic means to detect and quantify CDH symptoms during the formation of cervical lesions. This chapter presents the clinical benefits of melding the T-Scan Occlusal Analysis System with the Air Indexing Method when clinically assessing and treating cervical hard tissue pathologies. The clinician gains significantly more occlusal insight as opposed to using either methodology alone, when air indexing is combined with T-Scan's occlusal contact force and timing data. Lastly, this chapter introduces two case reports of how T-Scan guided occlusal adjustments can be effective at reducing CDH and prohibiting the progression of gingival recession.

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