Dental Casting and Examination Techniques

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Questions and Answers

What two types of casts are mentioned for observing intra-oral findings?

Diagnostic study casts and working models.

How does steepened canine guidance affect posterior teeth during lateral movements?

It improves separation of posterior teeth on right lateral movement.

What are the two main types of examinations included in the occlusal examination stage?

Extra-oral examination and intra-oral examination.

What materials can be used for making palatal backings in dental restorations?

Gold palatal backings or heat cured polymethylmethacrylate acrylic. Signup and view all the answers

What materials are used to create diagnostic study casts?

Alginate in metal rimlock tray and addition-cured silicone putty/wash. Signup and view all the answers

What role does acrylic resin play in the provisional restoration process?

Acrylic resin is used to reline and fit the shell provisional restoration. Signup and view all the answers

Name one type of articulator mentioned in the cast articulation and verification process.

Arcon semi-adjustable articulator. Signup and view all the answers

What is the purpose of making a silicone impression?

To create a working model and dies for fixed dental prosthesis fabrication. Signup and view all the answers

What are some clinical presentations associated with tooth surface loss?

Shortened teeth, wear faceting, and dentine sensitivity. Signup and view all the answers

What method is used to verify occlusive relationships during the dental procedure?

A bitefork recording is utilized for verification. Signup and view all the answers

Name two management strategies for restoration of teeth with limited interocclusal space.

Dahl technique and surgical crown lengthening. Signup and view all the answers

What is the purpose of the facebow record transfer in the cast articulation stage?

To transfer the spatial relationship of the maxillary cast to the articulator. Signup and view all the answers

What does the term 'MIP' stand for in dental terminology?

Maximum Intercuspal Position. Signup and view all the answers

What type of restoration is often used for teeth with large restorations or those affected by decay?

Cuspal coverage restoration, such as an overlaid plastic restoration or crown. Signup and view all the answers

What registration technique is mentioned for obtaining a centric relation record?

'Tooth apart' registration. Signup and view all the answers

How can occlusal trauma exacerbate periodontal disease?

The presence of occlusal trauma can lead to increased stress on periodontal tissues, worsening disease. Signup and view all the answers

What can be seen highlighted in the diagnostic study casts related to centric slide?

Horizontal and vertical components of centric slide from CO to MIP. Signup and view all the answers

What is one advantage of using vacuum mixed Type III Gypsum for diagnostic casts?

It provides a high level of detail and strength for dental models. Signup and view all the answers

What technique is described for obtaining impressions in stock trays?

Spacer technique. Signup and view all the answers

What management option can be provided to protect non-vital teeth during endodontic therapy?

Provision of a copper band or orthodontic band. Signup and view all the answers

What is a common consequence of tooth surface loss on patient sensitivity?

Dentine sensitivity is a common consequence. Signup and view all the answers

Which instrument is employed in collecting the centric relation record alongside the Lucia jig?

Tooth apart registration. Signup and view all the answers

Which management option can be employed to address occlusal trauma?

Management of periodontal disease as per required treatments. Signup and view all the answers

What is one invasive management technique for tooth surface loss?

Provision of composite restorations at an increased occlusal vertical dimension. Signup and view all the answers

What is the purpose of examining articulated study casts in dentistry?

To correlate clinical occlusal findings with what is observed on the mounted casts. Signup and view all the answers

How should the anterior ramp be designed concerning posterior teeth?

It should allow for minimal disclusion of the posterior teeth during movements. Signup and view all the answers

What method can be used to verify occlusal markings on articulated casts?

Using occlusal charts or clinical photographs can verify occlusal markings. Signup and view all the answers

What is the significance of using Shimstock bite foil when checking occlusal contacts?

Shimstock is the thinnest foil available, allowing precise assessment of occlusal holding contacts. Signup and view all the answers

What is the role of occlusal factors in temporomandibular disorders according to the literature?

Occlusal factors contribute to the development and exacerbation of temporomandibular disorders. Signup and view all the answers

How does occlusal trauma affect periodontal health based on animal studies?

Occlusal trauma accelerates attachment loss at the onset of experimental periodontitis in rats. Signup and view all the answers

What should be the minimum thickness of a splint at the closest point of contact in the CR?

The ideal thickness of the splint should be at least 2 mm. Signup and view all the answers

What assumption should a clinician make if the findings from mounted casts do not match intra-oral findings?

The clinician must assume that there was an imprecision in recording the CR and mounting the casts. Signup and view all the answers

What alternative treatment is suggested for cases with advanced localized attrition?

An alternative treatment involves utilizing adhesive materials for restoration. Signup and view all the answers

What technique can be used to highlight occlusal markings on a splint?

Occlusal markings can be highlighted by roughening the surface with alumina blasting. Signup and view all the answers

In the context of treatment for periodontitis, what is the significance of occlusal adjustment?

Occlusal adjustment may improve outcomes for patients with periodontitis by addressing bite issues. Signup and view all the answers

What findings were reported in the clinical evaluation of composite Dahl restorations?

The survival analysis indicated favorable outcomes for composite Dahl restorations in dentition restoration. Signup and view all the answers

Why is it important for clinicians to understand the thickness of occlusion indicating paper?

It's important for ensuring consistent communication with technicians regarding the materials used. Signup and view all the answers

What digital assessment method was mentioned for evaluating occlusal wear patterns?

A pilot study employed digital assessment techniques to analyze wear patterns on occlusal stabilization splints. Signup and view all the answers

What is the relationship between sodium hypochlorite and ethylenediaminetetraacetic acid irrigation in endodontics?

Both sodium hypochlorite and ethylenediaminetetraacetic acid irrigation independently and alternately affect tooth surface strain. Signup and view all the answers

How were occlusal interventions evaluated for their effectiveness in adults with periodontitis?

Occlusal interventions for periodontitis were evaluated through systematic reviews, indicating potential benefits. Signup and view all the answers

What benefit does full occlusal coverage provide regarding the proposed abutment tooth?

It allows no preparation to the proposed abutment tooth, preventing differential movement and migration of teeth. Signup and view all the answers

What is the advised occlusal scheme when designing a restoration?

The design should conform to the existing occlusal scheme if possible. Signup and view all the answers

How long does the author suggest the adjustment period for occlusal compensation may last?

The adjustment period can last between 2 and 6 months. Signup and view all the answers

What should be assessed if no occlusal compensation occurs after 6 months?

The clinician should consider an alternative treatment plan. Signup and view all the answers

What is the role of the occlusal splint mentioned in the text?

It acts as a protective measure against further tooth surface loss and damage caused by parafunctional activity. Signup and view all the answers

What factor significantly influences the success of occlusal compensation?

The amount of increase in the occlusal vertical dimension (OVD). Signup and view all the answers

How does the RBP restoration aid in occlusal adaptation?

It allows for occlusal adaptation through the intrusion of opposing teeth and vertical migration of others. Signup and view all the answers

What must always be anticipated and included in treatment planning according to the article?

The occurrence of intrusion or compensation of occlusion must be anticipated. Signup and view all the answers

Study Notes

Clinical Issues in Occlusion - Part I & II

Occlusion: Defined as the static relationship between the incising or masticating surfaces of the maxillary or mandibular teeth or tooth analogues. It encompasses dynamic relationships between the components of the masticatory system.

Introduction

Occlusion and Tooth Surface Loss (TSL): Attrition (wear from tooth-to-tooth contact) is a natural process. Pathological wear, exceeding physiological rates, is a concern due to accelerated tooth loss, pulp health risks, and potential difficulties in future restorative work.
Occlusion and Restoring/Increasing Occlusal Vertical Dimension (OVD): Severely worn teeth may appear shorter, but often compensatory adjustments in the jaw have occurred. Procedures like Dahl technique (using composite resin restorations) can address cases of OVD loss.
Occlusion and Mechanical Failure of Teeth: Cracks or fractures are a growing concern, particularly in older patients and posterior teeth. Overuse, parafunction, large restorations compromise structural integrity.
Protection of Non-Vital Teeth: Non-vital teeth have lower resistance to occlusal forces compared to vital teeth. Compromised structural integrity needs careful consideration in treatment planning.
Occlusion and Periodontium: Occlusal trauma can exacerbate periodontal inflammation. However, definitive causal evidence for this is not strong. Conservative approaches like patient education and muscle exercises are recommended first, over occlusal adjustments.
Occlusion and Temporomandibular Joint Dysfunction (TMJD): The connection between occlusion and TMJD is debated. No occlusal scheme is consistently linked to TMJD.
Occlusion and Ageing Patients: Patient's adaptive capacity to changes decreases with age. This can affect their ability to tolerate occlusal adjustments or new prosthetic appliances. Planning for increased needs is important.

Occlusal Examination

CO to MIP Relationship: The relationship between Centric Occlusion (CO) and Maximal Intercuspation (MIP) is often noted as different. This difference, or "centric slide" can be clinically evaluated.
Impressions and Diagnostic Study Casts: Alginate or silicone impressions are conventional methods for creating study casts used for model mounting on an articulator.
Cast Articulation and Verification: Mounting on an articulator (e.g., Arcon) is essential to allow for dynamic mandibular movements to be analyzed accurately.
Centric Relation Record: This entails recording the mandible's position when the condylar elements are in the most superior anterior position within their fossae without any tooth contact.

Occlusal Splints

Purpose: Splints can be used for diagnostic and therapeutic purposes involving stabilization or management of occlusal disharmony or for cases of bruxism.
Designs: Different splint designs (e.g., Michigan splint, Tanner splint) can be tailored for specific patient needs.

Case Report

Demonstrates clinically relevant occlusal examination and diagnostic procedures. Discusses a case that required restorative care for failing dental prosthesis.

Planning Restorations

Restoration designs need to accommodate occlusal assessments. Considerations include patient demands and preferences.

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Description

Test your knowledge on various dental casting methods and examination techniques used in dental practice. This quiz covers topics such as types of casts, occlusal examinations, and materials for restorations. Perfect for dental students and professionals looking to refresh their understanding.