Podcast
Questions and Answers
What is the primary reason for boxing an impression in dental procedures?
What is the primary reason for boxing an impression in dental procedures?
- To ensure the accurate reproduction of the impression borders in the cast. (correct)
- To reduce the setting time of the cast material.
- To simplify the removal of the impression from the cast.
- To decrease the amount of cast material needed.
Which of the following is an advantage of boxing an impression, besides preserving borders?
Which of the following is an advantage of boxing an impression, besides preserving borders?
- Controlled thickness of the base of the cast. (correct)
- Enhanced dimensional accuracy of the teeth in the cast.
- Decreased expansion of the gypsum material.
- Reduced risk of distortion during cast removal.
What benefit does vibrating the cast provide during the boxing procedure?
What benefit does vibrating the cast provide during the boxing procedure?
- It allows for better adhesion between the impression and the cast material.
- It aids in the uniform distribution of pressure during pouring.
- It prevents air bubbles, leading to a denser cast. (correct)
- It helps in achieving a smoother surface finish on the cast.
Which of the following is considered an advantage of boxing in terms of time and resources?
Which of the following is considered an advantage of boxing in terms of time and resources?
Why is it advantageous to avoid turning the impression during the boxing procedure?
Why is it advantageous to avoid turning the impression during the boxing procedure?
Which of the listed method is appropriate for boxing an impression?
Which of the listed method is appropriate for boxing an impression?
Besides wax, what other material can be used for boxing an impression?
Besides wax, what other material can be used for boxing an impression?
What type of wax is commonly used in the wax method of boxing impressions?
What type of wax is commonly used in the wax method of boxing impressions?
If a dental professional needs to make a device to relate casts in different positions, what should they use?
If a dental professional needs to make a device to relate casts in different positions, what should they use?
Occlusion blocks are comprised of occlusion rims and what other element?
Occlusion blocks are comprised of occlusion rims and what other element?
Why are guide lines drawn on the casts when creating occlusion blocks?
Why are guide lines drawn on the casts when creating occlusion blocks?
During the fabrication of an occlusion rim, what initial form is the wax sheet typically prepared in?
During the fabrication of an occlusion rim, what initial form is the wax sheet typically prepared in?
Where is the rolled wax sheet placed during the creation of an occlusion rim?
Where is the rolled wax sheet placed during the creation of an occlusion rim?
What is the primary purpose of a trial denture base, also known as a record base?
What is the primary purpose of a trial denture base, also known as a record base?
What key characteristic must a record base possess to ensure accurate adaptation to the cast?
What key characteristic must a record base possess to ensure accurate adaptation to the cast?
What property is crucial for a record base to prevent movement or displacement during maxillomandibular records?
What property is crucial for a record base to prevent movement or displacement during maxillomandibular records?
Which quality is important for the edges of a record base to promote patient comfort?
Which quality is important for the edges of a record base to promote patient comfort?
Which of these materials is typically used for temporary record bases that will be replaced by a permanent denture base?
Which of these materials is typically used for temporary record bases that will be replaced by a permanent denture base?
What is a drawback of using wax for a temporary record base?
What is a drawback of using wax for a temporary record base?
Why are cold cure acrylic resin record bases considered superior to shellac bases?
Why are cold cure acrylic resin record bases considered superior to shellac bases?
What characteristic does light cure resin provide for record bases?
What characteristic does light cure resin provide for record bases?
Which of the following materials is suitable for permanent record bases?
Which of the following materials is suitable for permanent record bases?
Which material can be used to create cast metal bases for permanent record bases?
Which material can be used to create cast metal bases for permanent record bases?
What is the function of an occlusion rim in the context of complete dentures?
What is the function of an occlusion rim in the context of complete dentures?
What is another term for occlusion rims?
What is another term for occlusion rims?
Which defining characteristic is correct about a record rim?
Which defining characteristic is correct about a record rim?
Which material is recommended for use in construction of the rims?
Which material is recommended for use in construction of the rims?
Besides wax, which other materials can be used for the rims of a record base?
Besides wax, which other materials can be used for the rims of a record base?
What is one of the main uses of occlusion rims in complete denture construction?
What is one of the main uses of occlusion rims in complete denture construction?
What determination relies on usage of occlusion rims?
What determination relies on usage of occlusion rims?
What occlusal determination do occlusion rims allow us to accomplish?
What occlusal determination do occlusion rims allow us to accomplish?
What is the approximate measurement from midline to the inferior portion of occlusal block?
What is the approximate measurement from midline to the inferior portion of occlusal block?
What is the approximate height of the occlusal block?
What is the approximate height of the occlusal block?
A dental technician is using the plaster and pumice method for boxing a lower impression. After applying the initial layer, what is the next crucial step?
A dental technician is using the plaster and pumice method for boxing a lower impression. After applying the initial layer, what is the next crucial step?
If a dental student uses wax that’s too warm(high temperature) when creating a record base, which of the following problems is most likely to occur?
If a dental student uses wax that’s too warm(high temperature) when creating a record base, which of the following problems is most likely to occur?
A dentist needs to create an accurate master cast with detailed anatomical surface and land area. Which of the following considerations is MOST crucial?
A dentist needs to create an accurate master cast with detailed anatomical surface and land area. Which of the following considerations is MOST crucial?
Why is it important to form a beaded edge when using a wax boxing method for an impression?
Why is it important to form a beaded edge when using a wax boxing method for an impression?
Flashcards
Boxing the impression
Boxing the impression
Boxing an impression involves enclosing it to preserve borders for accurate cast reproduction.
Advantages of boxing
Advantages of boxing
Preserves impression borders, controls base thickness, prevents air bubbles for denser cast, time and material conservation, eliminates impression turning.
Methods for boxing
Methods for boxing
Wax method and Plaster and Pumice method.
Wax Method
Wax Method
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Plaster and Pumice method
Plaster and Pumice method
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Anatomical Surface
Anatomical Surface
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Land Area
Land Area
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Base (Cast)
Base (Cast)
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Definitive/Master Cast
Definitive/Master Cast
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Inverted Pouring
Inverted Pouring
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Occlusion Blocks
Occlusion Blocks
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Trial denture base
Trial denture base
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Requirements of Record Base
Requirements of Record Base
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Temporary record base
Temporary record base
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Permanent record base
Permanent record base
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Occlusion Rims
Occlusion Rims
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Record Rim Definition
Record Rim Definition
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Record Rim Materials
Record Rim Materials
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Occlusion Rims Uses
Occlusion Rims Uses
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Study Notes
- Boxing the impression preserves the borders of the impression, so they are accurately reproduced in the cast.
- Boxing the impression is a process of enclosing or surrounding an impression to create a form into which dental plaster or stone can be poured.
- You can see a YouTube video about it at https://www.youtube.com/watch?v=DSbmxwn_ybY
Advantages of Boxing
- Borders of the impression are preserved.
- The thickness of the base can be controlled.
- Permits vibrating for denser casts and prevents air bubbles.
- Time for pouring the cast is conserved.
- Materials are conserved.
- No need to turn the impression.
Methods for Boxing
- Wax method
- Plaster and Pumice method
Wax Method
- Beading wax and carding wax are used for boxing.
- Used for both upper and lower impressions.
Plaster and Pumice method
- Plaster and pumice are used for boxing.
- Applicable for both lower and upper impressions.
Master Casts
- These are definitive casts used in the creation of complete dentures.
Occlusion Blocks
- Occlusion blocks consist of occlusion rims attached to trial denture bases.
- Occlusion blocks help in relating casts in different positions.
Guidelines for Occlusion Blocks
- Key landmarks on the cast include the center of the ridge posteriorly and anteriorly, the 1/2 way up retromolar area, and the land area, all relative to the mandibular cast.
Occlusion Rim Fabrication Steps
- Form a wax sheet into a roll.
- Shape the roll and place it on the record base.
Trial Denture Base/Record Bases
- An interim denture base supports the record rim material.
- Used for recording maxillomandibular records.
Requirements for Record Base
- Must be rigid.
- Should be accurately adapted to the cast.
- It must be easily adaptable without rocking.
- Edges should be smooth and rounded for comfort.
Types of Record Bases
Temporary Record Base
- Will be replaced by the permanent denture base.
- Wax:
- Easily distorted by body temperature.
- Can lead to incorrect occlusal relationships.
- Shellac base plates.
- Cold cure acrylic resin:
- Superior to shellac bases.
- Closely and accurately fits the cast.
- Stable in oral temperatures and doesn't soften.
- Light cure resin
Permanent Record Base
- Acrylic bases (heat cured)
- Cast metal bases, like Gold and Cobalt chromium
Occlusion Rims
- Surfaces are fabricated on interim/final denture bases for making maxillomandibular relation records.
- Can be called record rims.
- Record rims are interim denture bases to make maxillomandibular relationship records and/or arrange teeth.
- Construction materials: wax, composition (modeling compound), and plaster and pumice.
- Used for jaw relation records, tooth choice, and setting up teeth.
Occlusion Blocks Measurement
- 18 mm is an approximate measurement
- 22 mm is an approximate measurement
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