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Journal of the West African College of... 2023Dental agenesis is the most common developmental aberration in humans, and it is typically linked with a variety of other oral anomalies. Oligodontia, anodontia, and...
Dental agenesis is the most common developmental aberration in humans, and it is typically linked with a variety of other oral anomalies. Oligodontia, anodontia, and hypodontia are the words used in the literature to denote missing teeth. Although tooth agenesis is not a serious public health problem, it can cause speech, masticatory, aesthetic, and functional problems. A multidisciplinary approach is necessary to establish comprehensive treatment planning, counselling sessions, and frequent follow-ups, to obtain stable, functional, and psychological rehabilitation, which will eventually improves the patient's quality of life. In this case study, after considering the young age and growth of the patient and also his financial status, a conservative approach to rehabilitate the non-syndromic oligodontia patient with a 12-year follow-up and fabrication of maxillary overlay denture and mandibular conventional complete denture has been discussed.
PubMed: 38449548
DOI: 10.4103/jwas.jwas_294_22 -
The International Journal of Oral &... Feb 2024To evaluate the precision and efficiency of a novel guide system for single implant placement in the mandibular symphyses and to evaluate whether the outcome is affected...
PURPOSE
To evaluate the precision and efficiency of a novel guide system for single implant placement in the mandibular symphyses and to evaluate whether the outcome is affected by the level of operator experience.
MATERIALS AND METHODS
A total of 90 implants were placed in three different mandibular cast types (Cawood and Howell class III, IV, and V). For each model, a complete denture was 3D printed. A polyether ether ketone rail with a guide sleeve was embedded in the middle of the denture. To determine the ideal implant position, the sleeve could be moved in a buccolingual direction. Adjustment of implant angulation was possible, and an angle correction of 0, 12, or 24 degrees was available. A total of 30 clinicians were divided into three groups: group 1 (experienced, n = 10), group 2 (beginner, n = 10), and group 3 (inexperienced, n = 10). Each clinician was asked to plan and perform a guided flapless implant placement in the mandibular symphysis. Two preoperative CBCT scans were taken; the first was to verify the planning, and the second was to adjust the planning if needed. Finally, a postoperative CBCT scan was taken to compare the planning to the final implant position.
RESULTS
Based on the first CBCT, the clinicians adjusted their planning by an average of 1.66 ± 1.65 mm coronally, 2.41 ± 2.44 mm apically, and by a mean angular correction of 6.08 ± 0.77 degrees. After implant placement, the mean deviation from the planned implant position was 0.87 ± 0.58 mm at the coronal aspect and 0.98 ± 0.64 mm at the apical aspect. The mean angular deviation was 6.05 ± 0.71 degrees. Overall, there were no significant differences in coronal and apical deviation (P > .05) based on the level of experience. In terms of angulation, a significant difference was found in both planning (P = .049) and placement (P = .038) between beginners and experienced clinicians.
CONCLUSIONS
Guided implant placement of a single implant in the mandibular symphysis using a removable denture with guide sleeve had an acceptable level of accuracy. Clinicians with limited experience spent more time on the procedure, resulting in less angular deviation during implant planning and placement compared to experienced clinicians.
Topics: Denture, Overlay; Dental Implants; Research Design; Denture, Complete; Mandible
PubMed: 38416006
DOI: 10.11607/jomi.10301 -
Dentistry Journal Feb 2024Digital technology has been introduced in prosthodontics, and it has been widely used in denture duplication instead of a conventional denture duplication technique....
BACKGROUND
Digital technology has been introduced in prosthodontics, and it has been widely used in denture duplication instead of a conventional denture duplication technique. However, research comparing different denture duplication techniques and how they affect the fitting accuracy of the denture base is scarce.
OBJECTIVES
The aim was to assess the impact of duplication techniques on the accuracy of the fitting surface of computer-aided design and manufacturing (CAD-CAM) milled, 3D-printed, and injection-molded complete denture bases (CDBs).
METHODOLOGY
This study involved fabricating a mandibular complete denture base with three marked dimples as reference marks (A, B, and C at the incisive papilla, right molar, and left molar areas) using a conventional compression molded technique. This denture was then scanned to generate a standard tessellation language (STL) file; after that, it was duplicated using three different techniques (milling, 3D printing, and injection molding) and five denture base resin materials-two milled CAD-CAM materials (AvaDent and IvoBase), two 3D-printed materials (NextDent and HARZ Labs), and one injection-molded material (iFlextm). Based on the denture base type, the study divided them into five groups (each with = 10). An evaluation of duplication accuracy was conducted on the fitting surface of each complete denture base (CDB) using two assessment methods. The first method was a two-dimensional evaluation, which entailed linear measurements of the distances (A-B, A-C, and B-C) between reference points on both the scanned reference mandibular denture and the duplicated dentures. Additionally, a three-dimensional superimposition technique was employed, involving the overlay of the STL files of the dentures onto the reference denture's STL file. The collected data underwent statistical analysis using a one-way analysis of variance and Tukey's pairwise post hoc tests.
RESULTS
Both evaluation techniques showed significant differences in fitting surface accuracy between the tested CDBs ( ˂ 0.001), as indicated by one-way ANOVA. In addition, the milled CDBs (AvaDent and IvoBase) had significantly higher fitting surface accuracy than the other groups ( ˂ 0.001) and were followed by 3D-printed CDBs (NextDent and HARZ Labs), while the injection-molded (iFlextm) CDBs had the lowest accuracy ( ˂ 0.001).
CONCLUSIONS
The duplication technique of complete dentures using a CAD-CAM milling system produced superior fitting surface accuracy compared to the 3D-printing and injection-molded techniques.
PubMed: 38392236
DOI: 10.3390/dj12020032 -
The International Journal of... Feb 2024To compare the biomechanical responses of a normal mandible to an osteoporotic mandible with two-implant-supported magnetic attachments.
PURPOSE
To compare the biomechanical responses of a normal mandible to an osteoporotic mandible with two-implant-supported magnetic attachments.
MATERIALS AND METHODS
A 3D finite-element model of a two-implant-supported mandibular overdenture with magnetic attachments was developed, and normal and osteoporotic bone samples were prepared. Four types of load were applied to the overdenture in each model: 100 N vertical and oblique loads on the right first molar, and a 100 N vertical load on the right canine and incisors. Biomechanical behaviors of the peri-implant bone, implant, and mucosa were recorded. Maximum equivalent stresses and elastic strains were analyzed.
RESULTS
Equivalent elastic strain in osteoporotic cortical and cancellous bone was 9% to 71% and was 142% and 207% greater than in normal cortical bone, respectively. Equivalent elastic strain in the first molar oblique loading condition was 101% to 190% greater than in the first molar vertical loading condition.
CONCLUSIONS
Osteoporotic cancellous bone was weaker and less resistant to deformation than normal bone, and oblique loading was more harmful than vertical loading.
Topics: Denture, Overlay; Dental Implants; Finite Element Analysis; Dental Stress Analysis; Dental Prosthesis, Implant-Supported; Mandible; Magnetic Phenomena; Stress, Mechanical
PubMed: 38381984
DOI: 10.11607/ijp.7839 -
Clinical Oral Investigations Feb 2024Single denture rehabilitated patients have negative appraisals regarding oral function, mostly associated by stability and retention issues regarding mandibular... (Randomized Controlled Trial)
Randomized Controlled Trial
OBJECTIVES
Single denture rehabilitated patients have negative appraisals regarding oral function, mostly associated by stability and retention issues regarding mandibular prosthetics. Therefore, this study assessed patients' occlusal equilibration, muscle activity, and oral health-related quality of life (OHRQoL) receiving milled removable or fixed mandibular implant retained prostheses.
MATERIALS AND METHODS
Twenty-two edentulous mandibular ridges patients were randomly distributed into two groups based on the definitive prosthesis received. Group I: Removable mandibular implant-supported overdenture, Group II: Implant retained fixed prosthesis. Occlusal equilibration was evaluated utilizing Occlusense, muscle activity via Electromyograph (EMG) at delivery, after one, and three months. The OHRQoL was evaluated by Oral Health Impact Profile questionnaire (OHIP-19) before delivery and after follow-ups. Data were collected, tabulated, and analyzed, utilizing independent t-test and One-way ANOVA followed Tukey`s post-hoc test. Significance level set at P ≤ 0.05.
RESULTS
Groups I &II showed significant improvement in occlusal equilibration, muscle activity and OHRQoL. Group II demonstrated significantly higher improvement than group I in occlusal equilibration associated with muscle activity after 1 month, and in functional limitations domain in OHRQoL questionnaire after 3 months.
CONCLUSION
Implant retained mandibular prosthesis showed improvement in occlusal equilibration, muscle activity, and OHRQoL regardless of prosthesis type employed. Fixed implant-supported prosthesis revealed better outcomes than removable mandibular implant-supported overdenture concerning occlusal equilibration, muscle activity, and OHRQoL regarding functional limitations.
CLINICAL RELEVANCE
Implant retained mandibular prosthesis is one of best treatment options for single mandibular completely edentulous patients, as dental implants improved occlusal equilibration, muscle activity, and OHRQoL.
Topics: Humans; Dental Implants; Dental Prosthesis, Implant-Supported; Denture, Overlay; Jaw, Edentulous; Mandible; Mouth, Edentulous; Muscles; Occlusal Adjustment; Patient Satisfaction; Quality of Life
PubMed: 38378935
DOI: 10.1007/s00784-024-05558-w -
Oral Health & Preventive Dentistry Feb 2024This study aimed to assess the impact of photodynamic therapy (PDT) on the oral health-related quality of life (OHRQoL) among denture stomatitis patients with implant...
PURPOSE
This study aimed to assess the impact of photodynamic therapy (PDT) on the oral health-related quality of life (OHRQoL) among denture stomatitis patients with implant overdenture prostheses (IODs).
MATERIALS AND METHODS
The patients were recruited from a specialist dental practice according to selection criteria. The Candida spp. were identified and confirmed by the microbiological culture technique. Candida counts were estimated as colony-forming units (CFU/ml) at baseline, 15, 30, and 60 days. PDT was carried out twice a week with 72 h intervals for a period of 4 weeks. A structured questionnaire was used for data collection. It included the demographic details of the patients, including age, gender, education, marital and socioeconomic status (SES), oral habits, and smoking status. In addition, the Oral Health Impact Profile-EDENT (OHIP-EDENT) scale was added to assess the OHRQoL of all patients before and after PDT treatment. The data were analysed using descriptive statistics, the t-test and the Shapiro-Wilk test; statistical signifcance was set at p < 0.05.
RESULTS
At baseline, the overall mean Candida CFU/ml were quite high in the implant overdenture (IODs) samples, 37.12 ± 15.8, as compared to palatal mucosa samples with 5.1 ± 2.3. After PDT treatment, a statistically significant reduction was noted in the mean Candida CFU/ml on both surfaces at all follow-up visits. It was observed that all domains of OHIP-EDENT except for physical disability and handicap showed statistically significant improvement in mean scores after PDT treatment. FL, P1, P2, D2, and D3 had statistically significant mean score improvements of 2.2, 3.1, 2.2, 1.4, and 0.7, respectively. Furthermore, after PDT treatment, the total OHIP-EDENT score showed a statistically significant improvement of 11.6.
CONCLUSION
PDT treatment has a positive impact on the OHRQoL for patients with denture stomatitis. It can be used as an effective treatment option for the treatment of denture stomatitis in IOD patients.
Topics: Humans; Denture, Overlay; Quality of Life; Stomatitis, Denture; Dental Implants; Photochemotherapy
PubMed: 38376434
DOI: 10.3290/j.ohpd.b4997023 -
Compendium of Continuing Education in... Feb 2024Swallowed or aspirated dentures may result in serious systemic complications and require multidisciplinary attention or intervention. With an increasing number of...
Swallowed or aspirated dentures may result in serious systemic complications and require multidisciplinary attention or intervention. With an increasing number of edentulous elderly patients, such situations are not uncommon occurrences in everyday dentistry. In fact, dentures are the most ingested foreign body in the elderly patient population, and this is a particular risk if the dentures are lacking in stability. The present case report discusses the swallowing of an overdenture by a 95-year-old patient, who underwent endoscopic removal of the foreign body. The aim of this article is to highlight the risks of prosthetic restoration in older patients and the importance of thorough, scrupulous follow-up.
Topics: Aged, 80 and over; Humans; Deglutition; Denture, Overlay; Foreign Bodies; Mouth, Edentulous
PubMed: 38289627
DOI: No ID Found -
BMC Oral Health Jan 2024Different characteristics of bars (cross-sectional shape, diameter, distal extension etc.) lead to different biomechanical behavior (retention and stress) with implants...
Different characteristics of bars (cross-sectional shape, diameter, distal extension etc.) lead to different biomechanical behavior (retention and stress) with implants and peri-implant tissues.Aim: To evaluate the impact of implant-supported removable prostheses bar designs in fully edentulous arch (in the maxilla and/or mandibula), with 4 implants or more, on the peri-implant soft and hard tissues.Two reviewers searched for observational studies, RCT and in vitro studies, published on five main databases and three from the grey literature, without restrictions on November 2023.Of the 3049 selected articles, four met the inclusion criteria. Four RCT evaluated peri-implant health tissues in full edentulous arches with 4 or 6 implants rehabilitated with implant bar overdentures. One prospective study with 5 years follow-up evaluated the success/survival rate of implants and implant bar overdentures. Overall, 261 subjects were enrolled in our systematic review with 1176 implants. Overdentures' survival rate was 100%. There was a trend that plaque indices and gingival indices were low in all of the studies, however no statistical analysis was done due to the lack of information.Due to the lack of information in the included studies, we cannot confirm if bar characteristics affect the peri-implant tissues health.
Topics: Humans; Dental Implants; Prospective Studies; Jaw, Edentulous; Dental Prosthesis, Implant-Supported; Mouth, Edentulous; Mandible; Denture, Overlay; Denture Retention
PubMed: 38281916
DOI: 10.1186/s12903-024-03915-5 -
The Journal of Oral Implantology Dec 2023This study aimed to assess the accuracy of the marginal fit of 2 implant-supported overdenture bars fabricated with selective laser melting technology, using polyvinyl...
This study aimed to assess the accuracy of the marginal fit of 2 implant-supported overdenture bars fabricated with selective laser melting technology, using polyvinyl siloxane and vinyl siloxane ether impression materials and different impression techniques. Two implants with multi-unit abutments were inserted in a 3D-printed mandibular model and used as a reference model, then duplicated into a stone cast to fabricate custom trays for obtaining impressions with polyvinyl siloxane and vinyl siloxane ether impression materials, using both open and closed-tray techniques. This resulted in a total of 4 groups, each with 8 specimens. The impressions were poured and scanned, and 32 cobalt-chromium bars were fabricated using selective laser melting technology. Each bar was screwed onto one abutment of the reference model, and a standardized digital periapical radiograph of the opposite unscrewed side was taken; this process was repeated to the other abutment. The vertical misfit was measured at 3 predetermined positions on the unscrewed side, and 6 values per bar were recorded. The mean gap distance was measured, and the data were subjected to statistical analysis; the present study found that the open-tray technique with vinyl polyether siloxane impression material may offer improved accuracy for obtaining impressions for 2 implant-supported bars. The open-tray technique groups also showed better marginal fit than the closed-tray groups. However, further clinical research is required to confirm these findings.
Topics: Denture, Overlay; Dental Implants; Dental Impression Technique; Dental Impression Materials; Ethers; Polyvinyls; Siloxanes
PubMed: 38279655
DOI: 10.1563/aaid-joi-D-23-00068 -
Medicina (Kaunas, Lithuania) Dec 2023: Due to a lack of long-term clinical studies that would clarify whether the insertion of three mini-implants (MDIs) can be as successful treatment as the insertion of... (Randomized Controlled Trial)
Randomized Controlled Trial
: Due to a lack of long-term clinical studies that would clarify whether the insertion of three mini-implants (MDIs) can be as successful treatment as the insertion of four MDIs for the retention of mandibular overdentures (ODs), this 5-year prospective cohort study was set up. Participants ( = 83) randomly received either four or three MDIs and a mandibular OD. Clinical examinations were performed at the baseline, as well as after one, three, and five years, respectively. A total of 73 participants (38 in the four-MDI and 35 in the three-MDI groups) partook in the study. The marginal bone level change, success and survival rates, and prosthodontic maintenance were assessed. Repeated measures showed that the mean peri-implant bone loss increased progressively at a small amount over five years in both groups (four-MDI group = -0.36 ± 0.74; three-MDI group = -0.33 ± 0.27 mm; < 0.05). However, an ANCOVA revealed no significant effects of the group (no significant difference between the three- and the four-MDI groups; F = 0.085; = 0.771), gender (F = 0.023; = 0.88), or covariate age (F = 1.95; = 0.167) on the dependent variable: the 5-year MBL change. The success rate (together with successful survival) was 93.8% in the four-MDI group and 91.7% in the three-MDI group. The log-rank (Mantel-Cox) test revealed no significant differences between them ( = 0.373; = 0.541). In patients with narrow ridges, the insertion of three MDIs in the mandible for overdenture retention can be equally as successful as the insertion of four MDIs.
Topics: Humans; Denture, Overlay; Prospective Studies; Denture Retention; Mandible; Treatment Outcome
PubMed: 38276051
DOI: 10.3390/medicina60010017