Evaluation of Biting Force for Three Different Partial Denture Modalities in Bilateral Distal Extension Cases (Crossover Study)

Hakim, M.A. El; Badr, Amr Mohamed Ismail

doi:10.21608/edj.2020.24156.1033

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…Rotation of the distal extension base in a tissue ward direction occurs through function under occlusal force. This problem appears as a result of the variance of the viscoelastic responses among mucosa and the teeth 33 , which results in rotation of the free -end saddle RDP which consequently produces torque and higher liability of abutment damage. This torque should be managed and decreased when designing RDP s particularly with distal extension bases 34 .…”

Section: Discussionmentioning

confidence: 99%

“…As specified by Devan 1952 "Preservation of what is remaining rather than restoration of what is missing" is always the main target in prosthetic dentistry 35 , so the natural abutment should be saved from torquing through function. Resilient extracoronal attachments could be used in cases of distal extension bases permitting for a controlled degree of distal rotation 33 .…”

Section: Discussionmentioning

confidence: 99%

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PEEK Versus Metallic Framework For Extracoronal Attachment Mandibular Bilateral Distally Extended Removable Dental Prosthesis (RDP) Evaluation of Abutments Bone Height Changes and Patient Satisfaction. A Randomized Clinical Trial.

Ragheb

Elgamal

2022

Egyptian Dental Journal

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Purpose: to evaluate bone height changes around distal abutments (canines) with two different framework materials for extracoronal attachment mandibular bilateral distally extended removable dental prosthesis (RDP) and compare patient satisfaction . Materials and methods:Twenty-eight mandibular Kennedy class I partially edentulous patients with remaining 6 anterior teeth were selected. For all patients splinting of remaining anterior abutments by porcelain fused to metal crowns, the RDP frameworks were designed by CAD and printed into 3-D resin pattern. The patients were randomly divided into two groups. Patients in group I received extracoronal attachment RDP framework fabricated from milled BioHPP PEEK while patients in group II received extracoronal attachment RDP framework fabricated from Cobalt -Chromium (Co-Cr) material. Digital radiography was used for vertical bone loss (VBL) assessment around canines at insertion, 6 and 12 months. Patient satisfaction was measured after 6 months using visual analog scale (VAS). Statistical analysis was done by t-test and Mann-Whitney.Results: VBL significantly increased from T6 to T12 for both groups where (p=0.038 and 0.021) for PEEK and Co-Cr framework respectively. there was a significant difference in VBL between two groups at T12 only (p=0.012) where Co-Cr framework recorded significant higher VBL at T12 than PEEK. As for patients satisfaction, patients who received PEEK RDP frameworks were more satisfied as regards esthetic and comfort than patients who received Co-Cr RDP frameworks Conclusion: Extracoronal attachment RDPs with PEEK frameworks showed less VBL than those with Co-Cr frameworks. Patients with PEEK frameworks were more satisfied than patients with Co-Cr frameworks as regards appearance, comfort, and overall satisfaction.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

PEEK Versus Metallic Framework For Extracoronal Attachment Mandibular Bilateral Distally Extended Removable Dental Prosthesis (RDP) Evaluation of Abutments Bone Height Changes and Patient Satisfaction. A Randomized Clinical Trial.

Ragheb

Elgamal

2022

Egyptian Dental Journal

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“…(23) Regarding patient satisfaction with each prosthesis; patient comfort was higher in the PEEK group than Co-Cr group and this could be attributed to the weight of the prosthesis which usually has a major influence on the patient's comfort. (24,25) PEEK has a low specific weight thus allowing the construction of light weighed prostheses with good functionality offering high patient satisfaction and comfort through function. (22) (Zoidis et.…”

Section: Fig (2) Bar Chart Showing the Results Of Vas Scores For Both...mentioning

confidence: 99%

“…This is in agreement with who stated that PEEK frameworks allowed the patients to be more satisfied with their removable prosthesis more than conventional Co-Cr RPD, which will help to rehabilitate more partially edentulous patients with high appreciation and minimum complaints. (28,29) Also, this suggests that the appearance of patients with missing anterior teeth plays a more influential role in their satisfaction with their prosthesis than their ability to speak (speech quality) with their prosthesis.…”

Section: Fig (2) Bar Chart Showing the Results Of Vas Scores For Both...mentioning

confidence: 99%

Assessment of Acoustic Speech Signals and Patient Satisfaction With Two Partial Denture Framework Materials in Maxillary Kennedy Class Iv Cases. A Randomized Crossover Study.

EL Sherbini

2023

Egyptian Dental Journal

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Aim: This study aimed to measure the effect of two different framework materials on speech. Materials and methods:Twenty participants with maxillary class IV arches (maxillary four anterior teeth missing) each patient received two prostheses alternating in a cross-over design. For both prostheses, CAD designed and printed resin patterns of the framework were made. For the Co-Cr metallic framework, the resin was then invested and cast conventionally. For the PEEK group, it was constructed by injection molded technique (for two press technique). Evaluation of speech was done on the same visit of prosthesis insertion, then patients were scheduled for one and three months follow-up visits for each prosthesis using a Computerized Speech Lab (CSL) (spectrogram). The Visual analog scale (VAS) was used to assess the level of patient satisfaction using a questionnaire three months after denture insertion.Results: For speech evaluation: the PEEK group showed higher statistical significance mean duration for all sounds compared to Co-Cr group after three months p≤0.05. Also PEEK showed lower frequency levels for all sounds p≤0.05 except (n,l) p > 0.05. For patient satisfaction: PEEK RPD recorded significantly higher satisfaction scores group as regard the esthetic appearance, comfort and overall general satisfaction compared to the Co-Cr RPD group but there were insignificant differences (P>0.05) between the two groups regarding retention, stability and masticatory function. Conclusion:Co-Cr RPDs showed better speech qualities compared to PEEK RPDs. Patients with PEEK frameworks were more satisfied regarding RDPs appearance, comfort and overall satisfaction than patients with metallic Co-Cr frameworks.

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“…Resilient extra-coronal attachments have been indicated for distal extension base cases to prevent torque of abutments and to distribute load favorably between abutments and the edentulous ridge. It has been reported that stresses on the terminal abutment can be reduced by the use of an extra-coronal resilient attachment that allocates more load onto the distal edentulous ridge [19]. To reduce the stresses caused by extra-coronal attachments, abutments should be splinted with full coverage retainers [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Induced Strain of Different Extra-Coronal Attachment Materials in Mandibular Kennedy Class I Metallic Removable Partial Dentures After One Year of Clinical Simulation: An in-Vitro study

Shawky

2023

Preprint

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Background: The strain developed by different extra-coronal attachment materials during loading in aqueous environment as well as the effect of denture insertion and removal cycles is of prime importance. Accordingly, the aim of the current study was to assess the induced strain of different extra-coronal attachment materials in mandibular Kennedy class I metallic removable partial dentures after one year of clinical simulation. Methods: Twelve identical 3D-printed models representing mandibular Kennedy class I with first premolars as principal abutments bilaterally were fabricated having 4 removable dies each; canine and first premolar on which two splinted crowns with three different extra-coronal attachment materials (group A: PEEK/BioHPP, group B: zirconia, group C: metal)were fabricated bilaterally. Each of the 3D-printed models (n=4 for each group) was designed with four strain gauge slots, two on each side: 1mm distal to the first premolar (SG1 &SG3) and 1 cm away from the first one at the edentulous ridge (SG2&SG4). Removable partial dentures were constructed, and strain gauges were used to measure the strain applied both unilaterally and bilaterally by a universal testing machine before and after one year of clinical simulation where, an average of 5 readings were recorded for each model. Clinical simulation was performed through chewing simulator and dentures insertion/removal cycles. Repeated measures ANOVA and Tukey’s post-hoc test were used for data analysis at p < 0.05. Results: PEEK (BioHPP) group revealed the lowest induced strain before and after one year of clinical simulation compared to zirconia and metal groups during both unilateral and bilateral loading with significantly higher induced strain at SG2 & SG4 compared to that induced at SG1 & SG3. Metal group showed the same pattern but with significantly higher values compared to PEEK (BioHPP). For zirconia group after one year of clinical simulation, bilateral loading revealed significant decrease in induced strain at SG1&SG3 with a significant increase at SG2 &SG4. Conclusions: PEEK (BioHPP) is more effective in stress dissipation as an extra-coronal attachment in removable partial dentures compared to zirconia and metal. After one year of clinical simulation.

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Evaluation of Biting Force for Three Different Partial Denture Modalities in Bilateral Distal Extension Cases (Crossover Study)

Cited by 4 publications

References 7 publications

PEEK Versus Metallic Framework For Extracoronal Attachment Mandibular Bilateral Distally Extended Removable Dental Prosthesis (RDP) Evaluation of Abutments Bone Height Changes and Patient Satisfaction. A Randomized Clinical Trial.

PEEK Versus Metallic Framework For Extracoronal Attachment Mandibular Bilateral Distally Extended Removable Dental Prosthesis (RDP) Evaluation of Abutments Bone Height Changes and Patient Satisfaction. A Randomized Clinical Trial.

Assessment of Acoustic Speech Signals and Patient Satisfaction With Two Partial Denture Framework Materials in Maxillary Kennedy Class Iv Cases. A Randomized Crossover Study.

Induced Strain of Different Extra-Coronal Attachment Materials in Mandibular Kennedy Class I Metallic Removable Partial Dentures After One Year of Clinical Simulation: An in-Vitro study

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