-
Journal of Dentistry Jun 2024This review was to offer a comprehensive analysis of currently available evidence on post-extraction alveolar socket healing, including i) the histological and molecular... (Review)
Review
OBJECTIVE
This review was to offer a comprehensive analysis of currently available evidence on post-extraction alveolar socket healing, including i) the histological and molecular events during alveolar socket healing, ii) the dimensional ridge alterations after socket healing and controversies relating to sinus pneumatisation, iii) the patient-specific factors, procedural elements, and site-related variables influencing socket healing, iv) techniques and effectiveness of alveolar ridge preservation (ARP) procedure, and v) the philosophies and cost-effectiveness of ARP in clinical practice.
SOURCES AND STUDY SELECTION
To investigate the dimensional profiles of the alveolar ridge following unassisted healing, an overview of systematic reviews was conducted in February 2024 by two independent reviewers. Four electronic databases were searched in Pubmed, Embase, Web of science and Cochrane Library between 2004 and 2024 to identify all relevant systematic reviews on post-extraction healing. A further manual search of reviews was also conducted. The articles were further reviewed in full text for relevance. The AMSTAR-2 appraisal tool was adopted to assess methodological quality. Current research pertaining to other listed objectives was objectively analysed in narration.
DATA
11 out of 459 retrieved studies were selected and ultimately covered in this review on the dimensional changes of alveolar ridge following natural healing: Seven systematic reviews and four systematic reviews with meta-analyses. The methodological quality of all included reviews was critically low.
CONCLUSION
This review thoroughly examines the healing profiles of post-extraction alveolar sockets and highlights the dynamic process with overlapping phases and the inter-individual variability in outcomes. ARP procedure is a potential strategy for facilitating prosthetic site development, while the current evidence is limited. Herein, an individualised and prosthetically driven approach is crucial. Further well sized and designed trials with novel biomaterials need to be undertaken, and the role of artificial intelligence in predicting healing and assisting clinical decision-making could be explored.
CLINICAL SIGNIFICANCE
By advancing our understanding of alveolar socket healing and its management strategies, clinicians can make more informed decisions regarding patient and site level assessment and selection, surgical techniques, and biomaterial choices, ultimately contributing to the enhanced healing process with reduced complications and improved quality of life for patients undergoing tooth extraction and dental implant treatments.
Topics: Humans; Tooth Socket; Tooth Extraction; Wound Healing; Alveolar Process; Alveolar Ridge Augmentation; Alveolar Bone Loss
PubMed: 38574844
DOI: 10.1016/j.jdent.2024.104986 -
Dentistry Journal Aug 2023After tooth extraction, the alveolar ridge undergoes a physiological process of remodelling and disuse atrophy. Socket augmentation (SA) has been shown to preserve... (Review)
Review
After tooth extraction, the alveolar ridge undergoes a physiological process of remodelling and disuse atrophy. Socket augmentation (SA) has been shown to preserve alveolar bone volume in order to facilitate implant placement and reduce the need for staged grafting at a later date. Although autogenic grafting has been shown to be the gold standard in bone regeneration, it has significant disadvantages. To prevent post-extraction volumetric alterations and alveolar bone resorption occurring, alternative grafting materials, including xenografts, alloplasts, and allografts, have been used successfully in fresh extraction sites. However, these materials act mostly as bio-scaffolds and require a slower integration period of 6-8 months prior to implant placement. Recently, the use of autologous platelet-rich fibrin (PRF) has been advocated alongside socket augmentation as a method of bio-enhancement of healing of soft and hard tissues. PRF contains platelet-derived growth factors, hormones, and bioactive components such as cytokines that have been shown to promote angiogenesis and tissue regeneration during wound healing. The aim of this article is to review the evidence base for the SA technique Clinical benefits of SA will be discussed with a reference to two cases. Therefore, this narrative review will discuss the post-extraction bone changes, the importance of SA, and the bio-enhancement role of PRF in the management of extraction site defects when the alternative technique of immediate implant placement is not possible or contraindicated.
PubMed: 37623292
DOI: 10.3390/dj11080196 -
Advanced Healthcare Materials Oct 2023Alveolar microenvironmental models are important for studying the basic biology of the alveolus, therapeutic trials, and drug testing. However, a few systems can fully...
Alveolar microenvironmental models are important for studying the basic biology of the alveolus, therapeutic trials, and drug testing. However, a few systems can fully reproduce the in vivo alveolar microenvironment including dynamic stretching and the cell-cell interface. Here, a novel biomimetic alveolus-on-a-chip microsystem is presented suitable for visualizing physiological breathing for simulating the 3D architecture and function of human pulmonary alveoli. This biomimetic microsystem contains an inverse opal structured polyurethane membrane that achieves real-time observation of mechanical stretching. In this microsystem, the alveolar-capillary barrier is created by alveolar type 2 (ATII) cells cocultured with vascular endothelial cells (ECs) on this membrane. Based on this microsystem, the phenomena of flattening and the tendency of differentiation in ATII cells are observed. The synergistic effects of mechanical stretching and ECs on the proliferation of ATII cells are also observed during the repair process following lung injury. These features indicate the potential of this novel biomimetic microsystem for exploring the mechanisms of lung diseases, which can provide future guidance concerning drug targets for clinical therapies.
Topics: Humans; Endothelial Cells; Biomimetics; Pulmonary Alveoli; Lung; Coculture Techniques
PubMed: 37288987
DOI: 10.1002/adhm.202300850 -
The Journal of Prosthetic Dentistry Sep 2023Immediate implant placement provides a popular therapeutic option. However, compromised sockets may jeopardize the treatment outcome. (Meta-Analysis)
Meta-Analysis Review
STATEMENT OF PROBLEM
Immediate implant placement provides a popular therapeutic option. However, compromised sockets may jeopardize the treatment outcome.
PURPOSE
The purpose of this systematic review and meta-analysis was to investigate the treatment outcome in terms of the implant survival rate and success parameters of immediate implant placement in compromised extraction sockets.
MATERIAL AND METHODS
An electronic search was conducted in PubMed, Embase, Cochrane Library, and ISI Web of Science up to January 2021. Studies evaluating implant survival rate and main success parameters were included for a qualitative and quantitative analysis (risk ratio and mean difference).
RESULTS
In total, 43 studies with analysis of 4825 sockets were included. Compared with the noncompromised sockets, the compromised group showed no significant differences in implant survival rates (risk ratio=0.992; 95% confidence interval (CI)=0.979 to 1.005; P=.246). No significant statistical differences were found in marginal bone level at ≤12 months (mean difference [MD]=0.033; 95% CI=-0.012 to 0.078; P=.154) or esthetic parameters.
CONCLUSIONS
Immediate implant placement in compromised sites does not appear to decrease the survival and success rates. However, randomized clinical trials with large sample sizes should be conducted to draw a definite conclusion about the efficacy and safety of this treatment protocol in compromised sockets.
Topics: Dental Implantation, Endosseous; Dental Implants; Tooth Socket; Esthetics, Dental; Immediate Dental Implant Loading
PubMed: 34772483
DOI: 10.1016/j.prosdent.2021.09.025 -
Advanced Healthcare Materials Feb 2024The oxygenation membrane, a core material of extracorporeal membrane oxygenation (ECMO), is facing challenges in balancing anti-plasma leakage, gas exchange efficiency,...
The oxygenation membrane, a core material of extracorporeal membrane oxygenation (ECMO), is facing challenges in balancing anti-plasma leakage, gas exchange efficiency, and hemocompatibility. Here, inspired by the asymmetric structural features of alveolus pulmonalis, a novel triple-functional membrane for blood oxygenation with a Janus architecture is proposed, which is composed of a hydrophobic polydimethylsiloxane (PDMS) layer to prevent plasma leakage, an ultrathin polyamide layer to enhance gas exchange efficiency with a CO :O permeance ratio of ≈10.7, and a hydrophilic polyzwitterionic layer to improve the hemocompatibility. During the simulated ECMO process, the Janus oxygenation membrane exhibits excellent performance in terms of thrombus formation and plasma leakage prevention, as well as adequate O transfer rate (17.8 mL min m ) and CO transfer rate (70.1 mL min m ), in comparison to the reported oxygenation membranes. This work presents novel concepts for the advancement of oxygenation membranes and demonstrates the application potential of the asymmetric triple-functional Janus oxygenation membrane in ECMO.
Topics: Carbon Dioxide; Extracorporeal Membrane Oxygenation; Membranes, Artificial; Membranes; Hydrophobic and Hydrophilic Interactions
PubMed: 38010837
DOI: 10.1002/adhm.202302708 -
Clinical Oral Investigations Dec 2023To assess whether in animals or patients with ≥ 1 tooth extracted, hyaluronic acid (HyA) application results in superior healing and/or improved complication... (Meta-Analysis)
Meta-Analysis
OBJECTIVES
To assess whether in animals or patients with ≥ 1 tooth extracted, hyaluronic acid (HyA) application results in superior healing and/or improved complication management compared to any other treatment or no treatment.
MATERIALS AND METHODS
Three databases were searched until April 2022. The most relevant eligibility criteria were (1) local application of HyA as adjunct to tooth extraction or as treatment of alveolar osteitis, and (2) reporting of clinical, radiographic, histological, or patient-reported data. New bone formation and/or quality were considered main outcome parameters in preclinical studies, while pain, swelling, and trismus were defined as main outcome parameters in clinical studies.
RESULTS
Five preclinical and 22 clinical studies (1062 patients at final evaluation) were included. In preclinical trials, HyA was applied into the extraction socket. Although a positive effect of HyA was seen in all individual studies on bone formation, this effect was not confirmed by meta-analysis. In clinical studies, HyA was applied into the extraction socket or used as spray or mouthwash. HyA application after non-surgical extraction of normally erupted teeth may have a positive effect on soft tissue healing. Based on meta-analyses, HyA application after surgical removal of lower third molars (LM3) resulted in significant reduction in pain perception 7 days postoperatively compared to either no additional wound manipulation or the application of a placebo/carrier. Early post-operative pain, trismus, and extent of swelling were unaffected.
CONCLUSIONS
HyA application may have a positive effect in pain reduction after LM3 removal, but not after extraction of normally erupted teeth.
CLINICAL RELEVANCE
HyA application may have a positive effect in pain reduction after surgical LM3 removal, but it does not seem to have any impact on other complications or after extraction of normally erupted teeth. Furthermore, it seems not to reduce post-extraction alveolar ridge modeling, even though preclinical studies show enhanced bone formation.
Topics: Humans; Animals; Tooth Socket; Hyaluronic Acid; Trismus; Dry Socket; Tooth Extraction; Molar, Third; Pain
PubMed: 37963982
DOI: 10.1007/s00784-023-05227-4 -
Clinical Oral Investigations Aug 2023To investigate the histomorphometric changes occurring in alveolar ridge preservation (ARP) based on the use of different plasma concentrates (PCs) in randomized... (Meta-Analysis)
Meta-Analysis Review
OBJECTIVES
To investigate the histomorphometric changes occurring in alveolar ridge preservation (ARP) based on the use of different plasma concentrates (PCs) in randomized clinical trials (RCT). There is controversy whether the placement of PCs in ARP is effective in the formation of new bone.
MATERIALS AND METHODS
A systematic review search was conducted in PubMed, Scopus, Web of Science, and Cochrane Database to answer the PICO question: In patients undergoing tooth extraction followed by ARP, do PCs alone in the post-extraction socket in comparison with spontaneous healing improve new vital bone formation percentage in histomorphometric analysis after more than 10 weeks? The risk of bias was assessed and a meta-analysis was conducted.
RESULTS
Of 3809 results, 8 studies were considered suitable for inclusion. A total of 255 teeth were extracted in 250 patients. Regarding the PCs used, ARP was performed with platelet- and leukocyte-rich fibrin (L-PRF) in 120 sockets, and with pure platelet-rich plasma (P-PRP) in 31 sockets and 104 sockets were controlled. PCs improved new bone formation in ARP with respect to the spontaneous healing group (SMD = 1.77, 95%C.I. = 1.47-2.06, p-value < 000.1). There were no differences between the different PCs (L-PRF and P-PRP).
CONCLUSION
The results of this meta-analysis support the efficacy of the use of PCs in new bone formation in ARP. With respect to the different types of PCs studied, no differences were observed.
CLINICAL RELEVANCE
When planning implant surgery after tooth extraction, treatment with PCs should be considered for ARP. Any PC increases new bone formation compared to spontaneous healing.
Topics: Humans; Tooth Socket; Alveolar Process; Osteogenesis; Tooth; Platelet-Rich Plasma; Tooth Extraction; Fibrin; Alveolar Ridge Augmentation
PubMed: 37439800
DOI: 10.1007/s00784-023-05126-8 -
Orthodontics & Craniofacial Research Jun 2024We evaluated hearing loss and general intelligence among persons with auricle anomalies and cleft lip and/or alveolus and/or cleft palate (CLAP).
PURPOSE
We evaluated hearing loss and general intelligence among persons with auricle anomalies and cleft lip and/or alveolus and/or cleft palate (CLAP).
METHODS
A nationwide cross-sectional study of data recorded during 1966-2019, as mandatory pre-military recruitment of individuals.
RESULTS
Of 3 182 892 adolescents, 548 were diagnosed with auricle anomalies and 2072 with CLAP. For the latter, the adjusted odds ratios for the low, low to medium and medium general intelligence categories compared to the highest category were 1.4 [95% CI 1.5-1.2], 1.2 [95% CI 1.4-1.1] and 1.1 [95% CI 1.2-0.9] respectively. The corresponding values for the auricle anomalies were not significant.
CONCLUSIONS
General intelligence was impaired among individuals with CLAP, but no significant correlation was found among individuals suffering from auricle anomalies.
Topics: Humans; Cleft Palate; Cleft Lip; Cross-Sectional Studies; Female; Male; Adolescent; Intelligence; Israel; Hearing Loss; Child
PubMed: 37650486
DOI: 10.1111/ocr.12709 -
Plastic and Reconstructive Surgery Sep 2023For patients with cleft lip/palate, adolescence is a time of maxillofacial growth and complex psychosocial stressors. The personal significance of facial differences may...
BACKGROUND
For patients with cleft lip/palate, adolescence is a time of maxillofacial growth and complex psychosocial stressors. The personal significance of facial differences may change, making patient-reported outcomes measures (PROMs) invaluable. In this study, we use several scales from CLEFT-Q™ and FACE-Q™ to explore how aesthetic outcomes differ by age and by sex among patients with unilateral cleft lip/palate.
MATERIALS AND METHODS
This was a multi-center, cross-sectional study that prospectively collected CLEFT-Q™ and FACE-Q™ data across six cleft treatment centers during clinical appointments from 2019-2022. Subjects were aged 8-22y with unilateral cleft lip, alveolus, and palate who had not undergone tertiary operative care (maxillary advancement or septorhinoplasty) at the time of survey response. Data cross-sections were prepared by age (8-10y, 11-13y, 14y+), by sex, and by age and sex together.
RESULTS
Older age groups reported poorer aesthetic outcomes and worse appearance-related distress compared to younger groups. Although male and female subjects reported similar aesthetic outcomes, female subjects reported more appearance-related distress. When considered simultaneously, age and sex appear to have an intersectional impact on perceived aesthetic outcome and appearance-related distress during adolescence.
CONCLUSIONS
This exploratory project suggests that patients with cleft lip/palate may perceive worsening of facial aesthetic throughout the course of adolescence, the exact pattern of which may be dependent on sex. Future work will evaluate this hypothesis using longitudinal cohorts. It will be important to investigate psychosocial factors that may impact these outcomes, and also to quantify the impact of tertiary operative care on these outcomes.
PubMed: 37772883
DOI: 10.1097/PRS.0000000000011098 -
International Archives of... Oct 2023Squamous cell carcinoma (SCC) of the maxillary alveolus is a relatively rare disease. There is lack of data on this subsite as compared with other sites. The factors...
Squamous cell carcinoma (SCC) of the maxillary alveolus is a relatively rare disease. There is lack of data on this subsite as compared with other sites. The factors that affect survival in cases of maxillary alveolar SCC are tumor stage, local and cervical metastases, histological grading, and the margin status. To evaluate the overall survival (OS), the disease free survival (DFS), and the complex interaction and effects of margin status, histological differentiation, habits (such as smoking and the use of smokeless tobacco products), and cervical and distant metastases based on clinicopathological data. We examined the electronic database at our hospital from 2003 to 2017. We included all cases with a histopathological diagnosis of SCC of the maxillary alveolus. Tumors originating primarily from the maxillary alveolus were included, while those originating from adjacent subsites, like the hard palate, the buccal mucosa or the maxillary sinus were excluded. We also excluded all the patients who were not operated on with a curative intent. More than half of the patients had stage-IV tumors at the time of presentation, while only one fourth of them had nodal metastasis. The rate of recurrence increased in cases of primary tumors in advanced stages and the degree of histological differentiation. The 2-year and 5-year OS rates were of 54.5% (18 patients) and 30.3% (10 patients) respectively. Primary tumors in advanced stages, histological grade, and presence of nodal metastasis are poor prognostic markers in terms of long-term survival.
PubMed: 37876703
DOI: 10.1055/s-0042-1758214