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"tooth (material)"
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Immediate implant positioning using tooth‐derived bone substitute material for alveolar ridge preservation: Preliminary results at 6 months
Objectives In the present study we evaluated the effectiveness of the use of a novel autologous bone substitute derived directly from processing the extracted tooth in the upper premolar area to preserve a suitable esthetic score and functionality. Material and Methods Fourteen bone‐level implants with platform switching were inserted in 12 patients immediately after atraumatic extraction of premolars for restorative or endodontic reasons. The implant buccal bone gap was filled using autologous tooth extracted‐derived material. Clinical and radiographic parameters, including Pink Esthetic Score (PES) were evaluated at 6 months. Results A total of 10 patients accounting for 11 implants were included. PES showed a suitable esthetic result, and all the implant‐prosthetic rehabilitation reported full satisfaction for masticatory function, phonetics, and aesthetics. Bone levels were stable and not affected by implant location, lesion type, or bone quality. Conclusion Radiographically the autologous bone substitute used appears stable in the surgical site and there is good continuity between the autologous bone and the graft. No adverse effects such as periodontal inflammation, infection, or graft rejection was reported.
Journal Article
Prácticas de anatomía con enfoque odontológico
\"La anatomía es la ciencia que estudia las estructuras del cuerpo humano mediante numerosas técnicas. Entre ellas, la exploración de órganos cumple un papel fundamental en el aprendizaje de la disciplina. El presente texto tiene como propósito servir de guía al estudiante de ciencias de salud, en especial al odontólogo en formación, ofreciéndole una visión actualizada de la anatomía de la cabeza y del cuello. Mediante las experiencias de laboratorio propuestas, se pretende que el estudiante afiance los conocimientos adquiridos en la fase teórica, al tiempo que los aplica a su área disciplinar. Se hace imprescindible considerar que la anatomía debe orientarse aplicada a la práctica clínica. Por ende, la obra contiene diez guías de laboratorio, las cuales se encuentran orientadas de acuerdo con las competencias sugeridas por la Asociación Colombiana de Facultades de Odontología. Estas siguen una secuencia sistemática donde el trabajo autónomo del estudiante es primordial, apoyado en imágenes de estructuras y diagnósticas realizadas por las autoras, ubicadas de manera intercalada en el texto para su identificación. Además, se encuentran lecturas sugeridas a lo largo del texto que le permiten al lector tener las bases para desarrollar cada uno de los puntos de relación y aplicación clínica que se encuentran al finalizar cada guía. Por último, se presentan las normas generales de bioseguridad requeridas en el laboratorio de anatomía, útiles tanto para los estudiantes y docentes como para el personal de apoyo.\"
eBook
Comparative Histological Analysis of Dentine-Derived Tooth Grafts in Maxillary vs Mandibular Socket Preservation: A Retrospective Study of 178 Cases
(1) Background: In recent years, there has been a growing interest in tooth-derived materials as valuable alternatives to synthetic biomaterials for preventing alveolar ridge dimensional changes. This study aimed to evaluate the histological and clinical differences between alveolar ridge preservation procedures in the maxilla and mandible using demineralized dentin treated with Tooth Transformer®. (2) Methods: A total of 178 patients in good general health were enrolled, with 187 post-extractive sockets lacking buccal and/or palatal bone walls. Alveolar socket preservation procedures and histological evaluations were performed. The sites were divided into two groups: Group A (99 mandibular samples) and Group B (108 maxillary samples). After 5 months (±1 month), single bone biopsies were performed for histologic and histomorphometric analysis. (3) Results: Clinical outcomes demonstrated a good healing of hard and soft tissues with an effective maintenance of bone architecture in both groups. Histomorphometric analysis revealed a total bone volume of 50.33% (±14.86) in Group A compared to 43.53% (±12.73) in Group B. The vital new bone volume was 40.59% (±19.90) in Group A versus 29.70% (±17.68) in Group B, with residual graft dentin material volume at 7.95% (±9.85) in Group A compared to 6.75% (±9.62) in Group B. (4) Conclusions: These results indicate that tooth-derived material supports hard tissue reconstruction by following the structure of the surrounding bone tissue. A 6.8% difference observed between the maxilla and mandible reflects the inherent disparities in natural bone structures in these regions. This suggests that the bone regeneration process after tooth extraction adheres to an anatomical functional pattern that reflects the specific bone characteristics of each area, thus contributing to the preservation of the morphology and functionality of the surrounding bone tissue.
Journal Article
Maxillary Sinus Augmentation with Autogenous Tooth Grafting Material: A Systematic Review
The aim of this systematic review was to determine whether autogenous tooth grafting material (ATGM) is as safe and effective as other bone substitutes used for maxillary sinus augmentation procedures, evaluating histomorphometric and/or histological data, implant primary stability, associated complications and radiographic bone height measurements. An automated electronic search was conducted using four databases (Medline/PubMed, Scopus, Web of Science and Cochrane Library), supplemented by a manual search, to identify clinical human studies using particulate ATGM for the aforementioned procedure. The included studies had a sample size of at least four patients and were published before 31st July 2024. The Newcastle–Ottawa scale (NOS) and Joanna Briggs Institute (JBI) Critical Appraisal Checklist were used to assess the risk of bias in cohort studies and case series, respectively. Seven studies were included in the descriptive analysis, obtaining 128 participants (46.8% only treated with ATGM) and 192 placed implants. Due to the heterogeneity of the studies, meta-analysis could not be performed. The authors concluded that ATGM appears to be a feasible and safe alternative for maxillary sinus augmentation procedures. These results should be interpreted with caution due to the limited amount of scientific evidence on this topic and the heterogeneity between the included studies.
Journal Article
Evaluation of the Effects of Thermal Aging on the Surface Roughness of Novel Tooth-Colored Restorative Materials
Background: The development of composite resins has led to novel materials aimed at improving restoration longevity. This study evaluates the surface roughness of four tooth-colored restorative materials after thermal aging. Methods: Eighty Class V preparations were restored with Admira Fusion, Beautifil II, Equia Forte HT, and Filtek. The samples underwent thermocycling, and their surface roughness was measured with a 3D non-contact profilometer at 24 h post-restoration and after simulation for 1, 3, and 5 clinical years. Results: Equia Forte HT showed the highest surface roughness and significant surface deterioration over time, while Admira Fusion maintained the lowest roughness across all intervals. Conclusions: Admira Fusion, Filtek, and Beautifil II demonstrated superior surface stability, with Equia Forte HT showing the least favorable performance.
Journal Article
Inhibitory effect of a resin coat-containing prereacted glass fillers on the enamel demineralization of the primary teeth: An in vitro pilot study
Background: With an increasing interest in preventive strategies, pedodontics research is now more focused on developing newer materials and techniques to coat the primary teeth to prevent onset of new carious lesions. Aim: The aim of this study is to evaluate the inhibitory effect of prereacted glass (PRG) filler-containing resin coat on enamel demineralization of the primary teeth. Subjects and Methods: Eight de-rooted primary caries-free teeth sectioned into 4 mm × 4 mm were divided into either experimental group which received the PRG barrier coat or control group which was left uncoated. These were then immersed in acid buffer at pH 4.5 for 3 days. Mineral content was evaluated by scanning electron microscopy with energy dispersive X-ray analysis. Statistical Analysis: Data were collected and analyzed statistically using paired Student's \"t\" test, with a P < 0.05 being considered statistically significant. Results: When the calcium/phosphorous (Ca/P) ratio (wt%) which is indicative of the mineral content of enamel was compared, the values were higher for the experimental group than that for the control group and the association was statistically significant (P < 0.01). Conclusion: The higher Ca/P ratio of experimental group was suggestive of the ability of PRG barrier coat to inhibit enamel demineralization in the primary teeth.
Journal Article
Tooth-coloured materials for class II restorations in primary molars: systematic review and meta-analysis
Purpose
The aim of this systematic review was to compare the success rate of five tooth-coloured materials, namely Glass Ionomer (GI), Resin-Modified Glass Ionomer (RMGI), Composite Resin (CR), Polyacid-Modified Composite Resin or Compomer (CO) and High-Viscosity Glass Ionomer (HVGI) in primary molar Class II restorations.
Methods
Five databases were searched from inception to April 23, 2020 for randomized clinical trials comparing the failure rate of these materials. After duplicate study removal, data extraction and risk of bias assessment with the Cochrane tool, data synthesis was conducted, comparing all five tooth-coloured materials in pairs and computing the overall success rate for each one, respectively.
Results
A total of 5615 articles were obtained by electronic and hand literature search. After the application of the eligibility criteria, ten RCTs were included in this systematic review and six RCTs for meta-analysis. Their risk of bias was assessed to be high to moderate. Due to the small number of RCTs comparing the five restorative materials in pairs investigated in the same study, only three MAs were available for heterogeneity assessment. These were: (1) between CO-RMGI (RR 1.04 [0.59, 1.84];
p
= 0.88;
I
2
= 1%), (2) CR-CO (RR 1.12 [0.41, 3.02];
p
= 0.83;
I
2
= 57%), and (3) between CR-RMGI (RR 1.10 [0.74, 1.63];
p
= 0.65;
I
2
= 0%). No statistically significant differences were found between the two materials in all three comparisons.
Conclusion
CR, RMGI and CO presented no statistical differences. In comparison to other tooth-coloured materials, studies on GI were too few to allow recommendations about its use. More studies on HGVI are needed for evidence-based recommendations to be made. The evidence extracted from this meta-analysis was not strong enough (moderate), due to the small number of RCTs and the risk of bias ranging from high to moderate. More, well-designed RCTs comparing tooth-coloured materials for primary molar Class II restorations are necessary.
Journal Article
Gastric acid challenge: Mechanical proficiency and surface gloss of tooth-colored restorative materials
Background
To evaluate surface microhardness, roughness, and gloss changes of tooth-colored restorative materials [a direct composite (G-aenial A’Chord), an indirect composite (Gradia Plus), an ormocer (Admira Fusion), a giomer (Beautifil II), and an alkasite (Cention N)] after exposure to simulated gastric acid.
Methods
A total of 110 disc-shaped specimens (22 discs of each material) were prepared using silicone molds (8 mm×2 mm) and exposed to either gastric acid or artificial saliva (control). Surface roughness (Ra), gloss (GU), and microhardness (VHN) were measured at baseline and after 96-hour of immersion in the solutions and the respective changes (∆Ra, ∆GU, ∆VHN) were calculated. Intergroup comparisons were performed using ANOVA (Tukey post hoc) or Kruskal-Wallis tests (Bonferroni correction). Independent samples t-test or Mann-Whitney U test was used for comparisons of each material across immersion media, while paired t-test was applied for time-dependent analyses.
Results
In the gastric acid medium, changes in all parameters led to significant differences among restorative materials, while in the artificial saliva medium, significant differences were observed in ∆VHN and ∆GU. The statistically significant difference between immersion media was observed in both ∆VHN and ∆Ra values for the giomer group, and in only ∆VHN values for the alkasite and indirect composite groups. In the gastric acid medium, the decrease in VHN and GU values was significant across all subgroups, while the increase in Ra was statistically significant only in the giomer and alkasite groups.
Conclusions
While the giomer group exhibited the most significant changes in roughness and microhardness following exposure to gastric acid, all tested materials executed clinically admissible results regarding surface gloss.
Clinical trial number
Not applicable.
Journal Article