Impact of Impressions on Dentures: How Movement Affects Fit and Comfort

Q: Impact of Impressions on Dentures: How Movement Affects Fit and Comfort

Hello： If you feel uncomfortable, be sure to inform your dentist to see if a new impression is needed for a remake. <br>Please refrain from permanently cementing it for now, as we are still in the trial period. <br>It is definitely easier to address any issues now than to remove

Post-endodontic crown

Hello Dr.
Lin,
1.
I have a question regarding dentures.
During the impression process, the dentist asked Dental Assistant A to hold the model for five minutes.
However, while Assistant A was holding the model with her right hand, her left hand was busy organizing the clinic, causing her body to sway.
This resulted in noticeable movement in my mouth during the five minutes.
Will this affect the fit of the denture made by the technician? This is for the upper right post-root canal denture.
2.
For the upper left post-root canal denture, the dentist asked Dental Assistant B to hold the impression.
Assistant B was very diligent in holding the model for five minutes, so the denture returned by the technician was very satisfactory.
After minor adjustments by the dentist, it felt great when biting down, and the surface felt smooth when my tongue touched it, similar to the sensation of the previous post-root canal denture, which was also very good.
3.
However, for the upper right post-root canal denture, since Assistant A's hand was constantly moving, the denture returned by the technician feels strange when my tongue touches the surface, almost like the sensation of chewed gum, which is quite uncomfortable.
I'm not sure if this is the reason, but I feel this is the only explanation.
I'm concerned because during my next visit, the dentist will officially bond it, and I'm worried that if there are issues after it is fixed, it will be irreversible.
Since I am very sensitive to the feeling of my tongue touching it, could the movement during the impression have caused this issue? How can this be resolved? I apologize for the trouble, and I would greatly appreciate your response.
Thank you very much.

pinggu, 30~39 year old female. Ask Date: 2021/09/26

Dr. Lin Jiayong reply Dentistry

Hello: If you feel uncomfortable, be sure to inform your dentist to see if a new impression is needed for a remake.
Please refrain from permanently cementing it for now, as we are still in the trial period.
It is definitely easier to address any issues now than to remove it later after it has been permanently cemented.
Sincerely, Lin Chia-Yung, Department of Dentistry, Taichung Hospital, Ministry of Health and Welfare.

Reply Date: 2021/09/26

More Info

The concerns you've raised regarding the impact of impressions on dentures are quite valid and highlight the importance of precision in dental procedures. Let's break down your questions and provide a comprehensive understanding of how movement during the impression process can affect the fit and comfort of dentures.

1. Impact of Movement During Impressions: When taking an impression for dentures, it is crucial that the impression material remains stable and undisturbed for the duration of the setting time. If the dental assistant (in this case, Assistant A) is moving or adjusting the model while the impression is being taken, it can lead to inaccuracies. The impression captures the contours of your gums and any remaining teeth, and any movement can result in a distorted impression. This distortion can lead to dentures that do not fit properly, causing discomfort, difficulty in chewing, and potential issues with speech.
In your case, since you felt significant movement during the impression process, it is possible that this could affect the final product. If the impression was not taken accurately, the technician may have created a denture that does not conform well to your mouth, leading to the uncomfortable sensation you described, akin to chewing gum.

2. Comparison with a Stable Impression: In contrast, when Assistant B held the impression stable for five minutes, it allowed for a more accurate capture of the oral structures. This stability is essential for creating a denture that fits well and feels comfortable. The fact that you found the denture from this impression to be satisfactory indicates that the impression process was executed correctly, leading to a well-fitting prosthesis.

3. Addressing Concerns About the Right Denture: Given your discomfort with the right upper denture, it is advisable to communicate your concerns with your dentist before the denture is permanently cemented. If the impression was indeed compromised due to movement, your dentist may need to take a new impression to ensure that the final product fits correctly.
It is also important to consider that once the denture is permanently fixed, any discomfort or improper fit may be more challenging to rectify. Therefore, it is crucial to address these concerns proactively.
4. Recommendations for Resolution: Here are some steps you can take to resolve the issue:
- Communicate with Your Dentist: Express your concerns about the right upper denture and the sensation you are experiencing. Your dentist may recommend taking a new impression to ensure a proper fit.

- Trial Fitting: If possible, request a trial fitting of the denture before it is permanently cemented. This allows you to assess the fit and comfort and make any necessary adjustments.

- Follow-Up Appointments: Ensure that you have follow-up appointments scheduled to monitor the fit and comfort of your dentures after they are placed.

In conclusion, the impression process is a critical step in creating comfortable and functional dentures. Any movement during this process can lead to inaccuracies that affect the final product. It is essential to communicate openly with your dental team about any concerns you have, as they can provide the necessary adjustments or re-evaluations to ensure your dentures meet your comfort and functional needs. Your proactive approach will help ensure that you receive the best possible care and outcomes from your dental treatment.

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