Impacted Wisdom Teeth Research Articles

Psychological Effects of Missing Maxillary Anterior Teeth on Daily Life

The orofacial region's appearance and functionality are crucial parts of human life that can be impacted by tooth loss and lower quality of life. The purpose of this study was to determine how anterior tooth loss affected patients' quality of life and dental satisfaction. Methods: 100 control subjects without missing teeth and 100 partly edentulous patients with missing anterior teeth were enrolled in the study. By age, gender, and educational attainment, the control participants were comparable to the patients. The impact of dental issues on daily life and dental satisfaction was evaluated using a dental impact on daily living questionnaire. Patients' daily activities, contentment with their looks, pain thresholds, dental comfort, overall performance, and eating abilities are all significantly impacted by tooth loss (p=0.000). The patients' overall satisfaction with their dentition and daily living was unaffected by their age or education level. Females, however, were less satisfied than males with their eating, general performance, and looks (p=0.003, 0.005, and 0.007, respectively). Patients' overall satisfaction (p=0.028) and their contentment with their look, dental comfort, general performance, and eating dimensions (p=0.001, 0.048, 0.011, and 0.009, respectively) all showed significant associations with the number of missing anterior teeth. Conclusion: Regardless of individual characteristics like age, gender, and educational level, tooth loss has a definite impact on patients' happiness with their dentition. The degrees of satisfaction with dentition and daily living decline as tooth loss increases.

Evaluation of the efficacy of topical rifamycin application on postoperative complications after lower impacted wisdom teeth surgery

PurposeThis study aimed to evaluate the efficacy of a single-dose topical rifamycin application on postoperative complications after impacted lower third molar surgery. Materials and methodsThis prospective, controlled clinical study consisted of individuals with bilaterally impacted lower third molars that would be extracted for orthodontic reasons. The extraction sockets were irrigated with 3 ml/250 mg of rifamycin solution in Group 1, while in Group 2 (control group) the extraction sockets were irrigated with 20 ml of physiological saline. Pain intensity was measured daily for 7 days by using visual analog scale. Trismus and edema were evaluated preoperatively and on the postoperative days 2 and 7 by calculating the proportional changes in maximum mouth opening and mean distance between reference points of the face, respectively. Paired samples t-test, Wilcoxon signed rank test and Chi-square test were used to analyze the study variables. Results35 patients (19 female, 16 male) were included in the study. The mean age of all participants was 22.19±4.98. Alveolitis was observed in 8 patients, (6 in the control group, 2 in the rifamycin group). There was no statistically significant difference between groups in terms of trismus and swelling measurements on the 2nd and 7th postoperative days (p>0.05). VAS scores were significantly low in rifamycin group on postoperative days 1 and 4 (p<0.05). ConclusionWithin the limits of the present study, topical rifamycin application reduced the incidence of alveolitis, prevented infection, and provided analgesic effect after surgical removal of impacted third molars.

Comparison between Partial Newmann Flap Versus Modified Partial Newmann Flap in Mandibular Third Molar Surgery

Aim: To compare the outcomes of two different flap techniques, namely the Partial Newmann Flap (FNP) and the Modified Partial Newmann Flap (MPNF), in surgical extraction of mandibular third molars. Methods: This randomised clinical study included 186 participants, 93 each group. The research comprised male and female patients aged 20–45 with lower mesioangular impacted third molar till 18–21. Patients with vertically impacted wisdom teeth, disto-angular impaction, horizontal impaction, pregnancy, trismus, pericoronitis, and oral submucous fibrosis were excluded. The student t-test compared mouth opening across groups, whereas the chi-square test compared discomfort and edoema. Results: The mean age of the participants was 32.17±8.30 years. On the first day, the MPNF group reported significantly less moderate pain (34.41%) compared to the NPF group (56.99%) (p=0.001). On the third day, the MPNF group reported significantly more mild pain (55.91%) and less severe pain (1.08%) compared to the NPF group, which reported less mild pain (49.46%) and more severe pain (7.53%) (p=0.028). Similarly, mouth opening was significantly higher in the MPNF group than the NPF group on the 1st, 3rd, and 7th day. Swelling was significantly less in the MPNF group than the NPF group on the 1st and 3rd day. Conclusion: The Modified Partial Newmann Flap may be a better alternative compared to the Partial Newmann Flap in terms of pain, swelling, and mouth opening during the disimpaction of lower third molars. Keywords: Partial Newmann Flap, Modified Partial Newmann Flap, Mandibular Third Molar

Bilateral bifid condyle mandibula features in panoramic radiography: a case report

Objectives: The aim of this case report is to describe radiographically the specific features of bifid mandibular condyle that frequently found incidentally on panoramic radiographs.&#x0D; Case Report: A 24-year-old man came to the Installation of Dental Radiology RSGM UNPAD brought a referral letter for a panoramic photograph. From anamnesis is known patient have complaints of pain in the jaw joints left and right at the time of open mouth. Panoramic radiographs show mesioangular dental impaction of 48, and edentulous tooth 36 and presence of bifid condyle on the right and left condyle. Bifid condyle usually becomes incidental finding on routine panoramic radiographic examination. Bifid condyle features can be shown by depression or notch on the superior surface of condyle. Bifid condyle can provide a "heart-shaped" from the frontal view. For a definite feature can be seen with other modality such as CBCT. Sometimes there is also a change in the mandibular fossa to compensate the morphological changes of the condyle.&#x0D; Conclusion: Bifid condyle mandible is a variation in the shape of the condyle whose cause is not known with certainty. The bifid condyle gives the "heart-like" appearance that is often found on accidental panoramic radiographs. Generally, cases of BMC do not require treatment unless they cause symptoms.

Three-dimensional facial swelling evaluation of piezo-electric vs conventional drilling bur surgery of impacted lower third molar: a randomized clinical trial

BackgroundAmong the post-surgical complications of lower wisdom teeth surgery, swelling is considered by patients one of the most impairing, with both social and biological influences and impacting patients' quality of life. Aim of the study was to evaluate the swelling following the osteotomy when performed with drilling burs versus piezo-electric instruments in the mandibular impacted third molar extraction, using a facial reconstruction software.Materials and methodsA randomized, split-mouth, single-blind study was conducted on patients, ranging between 18 and 40 years of age, requiring lower third molars extraction and referred at the Oral Surgery Unit of the School of Dentistry of the University of Messina. Twenty-two patients were recruited during an 8 months period according to the following criteria: good general health conditions; bilateral, symmetrical, impacted third molars; no use of medication that would influence or alter wound healing; no temporomandibular joint disorder history; no smoking. All patients underwent bilateral surgical removal. For each patient, a facial scan was obtained prior to the surgical procedures. The two extractions were conducted performing, in a randomized way, osteotomy with rotatory burs or use of piezo surgical instruments. Facial scans were repeated at 3 and 7 days after the surgical procedures. Volumetric differences were calculated via superimposition using a dedicated software. The data obtained were processed using paired t-test.ResultsThe results obtained from our study showed no significant differences between two groups regarding post-operative swelling. To the best of our knowledge, this study represents the first experience of using an objective method that can be reproducible on the collection of patients' clinical parameters.ConclusionsThe 3D digital analysis, in the evaluation of facial swelling, is a technique of simple application, objective, reproducible, reliable, decreasing the variables of error.Based on these data, it is possible to conclude that piezo surgery is a safe way for performing the osteotomies during third molar surgery. However, regarding the post-operative swelling, it does not show an advantage over classical rotary instruments.Trial registrationRegistered on ClinicalTrials.gov (ID: NCT05488028, on 04/08/2022).Approved by Ethical Committee of Messina: (ID 01–2020, on 27/04/2020).

Kinesio Taping as an Adjunct Therapy in Postoperative Care after Extraction of Impacted Third Lower Molars—A Randomized Pilot Study

The study comprised a group of 30 patients, randomly divided into the test group (with KT, n = 15) or the control group (without KT, n = 15). The surgery was performed according to standard procedures. In the test group, KT was applied immediately after surgery. Pain, swelling, and trismus were assessed. The VAS scale was used to assess pain. Swelling was measured based on six reference points on the face using a tailor's meter, and a caliper was used to measure the distance between the upper and lower medial incisors of the upper and lower teeth to determine the extent of trismus. Measurements were performed three times: on the day of the surgery, on the second day following the surgery, and on the 7th day after the surgery. Pain intensity (day of procedures), maximum mouth opening (on the seventh day after the surgery), and the use of NSAIDs (day of surgery) were significantly lower (p < 0.05) in the test group than in the control group. Kinesio taping in addition to NSAIDs was found to be more effective than NSAIDs alone in increasing the degree of jaw opening, decreasing pain intensity, and reducing the non-steroid anti-inflammatory dosage in patients after impacted mandibular wisdom teeth surgery.

Efficacy of continuous intravenous remimazolam versus midazolam in the extraction of impacted wisdom teeth: protocol of a randomised controlled trial

IntroductionBenzodiazepines such as midazolam are widely used to moderately sedate patients during impacted wisdom tooth extraction to reduce anxiety in outpatient surgery. This present protocol was designed to determine whether...

REASONS FOR EXTRACTION OF MANDIBULAR THIRD MOLAR AT TERTIARY CARE CENTRE IN EASTERN NEPAL

Background: Mandibular third molar is unique as relatively large number are either malposed, impacted or underdeveloped. This characteristic often leads to higher prevalence of dental caries, periodontal diseases and pathological lesions such as cysts, tumours or space infections leading to extraction of mandibular third molars. The objective of this study was to assess the reasons for mandibular third molar extraction. Methods: A descriptive cross-sectional study was conducted on 146 patients from 1st August 2021 to 31st July 2022 in the department of Dental surgery of Birat medical college and teaching hospital. Data were analysed by Statistical Package for Social Sciences (SPSS) version 22. Results: Out of 146 patients 90 (61.6%) were females and 56 (38.4%) were males. Reasons for mandibular third molar extraction were dental caries (n=67; 45.9%), impaction (n=62; 42.5%), periodontitis (n=10; 6.8%) and others (n=; 4.8%) which included traumatic ulcer on the tongue (n=3; 2%), angle fracture of the mandible (n=2; 1.4%), dentigerous cyst (n=1; 0.7%) and fascial space infection (n=1; 0.7%). Conclusions: The most common reasons for extraction of mandibular third molar was dental caries. Most common reason for extraction in age ≤ 25 years was impaction and it gradually shifted to dental caries as age progressed. Impaction was the most common reason for extraction of mandibular third molar in males however it was dental caries in females.

A Retrospective Analysis of Postoperative Abscess Formation Following Wisdom Tooth Removal and Their Clinical Condition and Localization.

As a common procedure in oral surgery, the removal of wisdom teeth (3M) is associated with a variety of postoperative complications. This study reports of deep tissue abscesses after the removal of 3M in correlation to several factors. Patients between 2012 and 2017 with removed 3M were retrospectively evaluated in terms of clinical condition and localization and thus assigned tog A (removal of asymptomatic 3M) or group B (removal of symptomatic 3M). Moreover, they were analyzed in terms of abscesses after the removal and correlation with various parameters: localization of the abscess, general diseases, perioperative antibiotic treatment, number of days from removal of the tooth to abscess formation, and postoperative complications after primary abscess incision. About 82 patients (male n = 44, female n = 38) were included, with 88 wisdom teeth removed and postoperative abscesses. Postoperative abscesses occurred more frequently in group B (n = 53) with n = 29 in IIB localization, without a significant correlation. Patients in this group were older, and there were more surgical abscess incisions needed, despite a longer treatment with oral and intravenous antibiosis that correlated with neurologic diseases and age. Younger patients reported significantly more pain. Detection of potential 3M pathologies at an early and asymptomatic stage is essential to avoid postoperative complications following 3M removal. Additional prospective studies are necessary to develop corresponding guidelines. Wisdom tooth extraction is the most common operation in oral surgery, and therefore, adequate risk evaluation is still required.

Comparing the Outcomes of Conventional Coronectomy and Graft Coronectomy: A Systematic Review

Introduction: Coronectomy is a widely accepted alternative surgical treatment modality in which only the crown of an impacted tooth is removed, leaving the roots and their associated nerve untouched. Uncertainty remains regarding whether intraoperative bone grafting of the coronectomy socket can reduce the incidence of typical postoperative procedure-related complications. Objective: The purpose of this literature review is to compare the outcomes of conventional coronectomy (CC) and grafted coronectomy (GC) in terms of whether adding a bone graft material after coronectomy of impacted mandibular third molars would decrease the incidence of typical complications. Methods: A total of 13 cases identified from electronic databases were included in this review based on their clinical relevance. Results: In general, there were no significant differences between conventional coronectomy and grafted coronectomy regarding the incidence of postoperative morbidities. However, grafted coronectomy with the placement of a bone graft material in the coronectomy socket could significantly decrease the incidence of root migration requiring re-operation of the exposed roots and reduce the preexisting pocket depth distal to the 2nd molar, especially in patients with mesioangular, impacted or horizontal wisdom teeth. Conclusion: According to the existing literature, grafted coronectomy might offer better clinical outcomes and can minimize the typical procedure-related drawbacks of conventional coronectomy while having similar surgical morbidities.

Dental anomalies in an Albanian orthodontic sample: a retrospective study

BackgroundTo evaluate the prevalence and the distribution of dental anomalies in an Albanian orthodontic sample.MethodsFor this retrospective study, a sample of panoramic radiographs (PR) of n. 779 (456 F and 323 M, mean age of 15.1 ± 5.5 years) Albanian subjects with no genetic syndromes or craniofacial malformations (e.g., cleft lip/palate), history of extraction, trauma or previous orthodontic treatment drawn from the archives of the University Dental Clinic Our Lady of Good Counsel, was examined. The inclusion criteria were: subjects from 8 to 30 years of age, good quality of PRs in order to allow the assessment of crown and root development. For different dental anomalies, both the prevalence and the association were evaluated by using Chi-square test (p < 0.05).Results24.4% of the sample had at least one dental anomaly and 4.6% had more than one. The following dental anomalies were most prevalent: hypodontia (9.8%), dental impaction (7.6%), and ectopic eruption (5.3%). No statistically significant correlation was found between males and females (p > 0.05).ConclusionsThe most common anomalies in this group are found to be those of number and position, and only radiological investigations can reveal either of these anomalies. Early diagnosis of dental anomalies can contribute to prevent their complications and to establish the most suitable therapy to achieve a functional occlusion.

Perspectives on dental health and oral hygiene practice from US adolescents and young adults during the COVID-19 pandemic.

Adolescence is a critical time for adopting health behaviors which continue through adulthood. There is a lack of data regarding perspectives of US adolescents and young adults on their dental health and oral hygiene practice. Adolescents and young adults, age 14-24, from MyVoice, a nationwide text message poll of youth. were asked five open-ended questions on the importance of dental health and impact of the COVID-19 pandemic. Responses were qualitatively analyzed using thematic analysis. Chi-square test was used to examine differences in experiences by demographics. Of 1,148 participants, 932 responded to at least one question. The mean age was 19 years. Respondents were largely male (49.5%) and non-Hispanic white (62.4%). Most (92%) respondents perceived dental health as important or somewhat important and emphasized overall dental health and hygiene (38.6%) and aesthetics (18.3%). About half (49.2%) of respondents stated they have had at least one cavity since middle school. Just over half (54.8%) reported brushing and flossing to care for their dentition. 58% visited a dentist at least every 6 months, while 38% visited a dentist less frequently or not at all. Being non-cisgender, non-Hispanic black, Hispanic, and receipt of free or reduced lunch was associated with less frequent dental visits. 44% stated COVID-19 impacted their dental health, with many mentioning scheduling difficulties or worsened dental hygiene. Most youth in our study consider dental health important, though their oral hygiene practice may not follow ADA guidelines and self-reported dental caries are high. Dental healthcare among youth has been affected by the COVID-19 pandemic with interruption in regular dental visits and changes in hygiene habits. Re-engagement of adolescents and young adults by dental care providers via greater access to appointments and youth-centered messaging reinforcing hygiene recommendations may help youth improve dental health now and in the future.

Comparison of the effects of removable functional appliance therapy applied in pubertal and postpubertal periods: A retrospective cephalometric and fractal analyses study

In this study, we compared the effects of functional treatment with Twin-block appliance on the bony architectures of the maxilla and mandible by fractal dimension (FD) analysis, and the skeletal and dentoalveolar effects by cephalometric analysis, in pubertal and postpubertal patients with Class II malocclusion. This study comprised 60 patients who underwent Twin-block treatment. Group 1 consisted of 30 patients in the pubertal period (6 boys and 24 girls; mean age 12.27 ± 1.35 years), whereas group 2 consisted of 30 patients in the postpubertal period (6 boys and 24 girls; mean age 13.73 ± 1.51 years). FD analysis was performed on the patients before and after Twin-block panoramic and lateral cephalometric radiographs. Cephalometric analysis was also conducted. Paired and Student t tests were used to compare the parametric data, and Wilcoxon signed rank and Mann-Whitney U tests were conducted to compare the nonparametric data. SNB, Pg-N, N-Me, ANS-Me, IMPA, L1/NB, Co-Gn, Go-Gn, S-Go, Co-Go, and Go-Me significantly increased in both groups after treatment. FD values of tuber, condyle, and molar regions significantly decreased in group 1, whereas no significant differences were observed in group 2 after treatment. In the pubertal period, the Twin-block appliance resulted in skeletal correction by causing bone remodeling and reshaping in both jaws along with the dentoalveolar correction. In the postpubertal period, Twin-block had no significant effect on the bone trabecular arrangement in the investigated areas but produced cephalometric improvement to a certain extent with lower skeletal and higher dental impact.

ULECTOMY AS A SURGICAL OPTION IN PRIMARY HEALTH CARE

Introduction: One of the clinical challenges that comprises the phase of mixed dentition in pediatric patients is tooth impaction. This alteration has a multifactorial etiopathology, with local and systemic factors being related. When tooth eruption does not occur spontaneously, the dentist can perform a surgical procedure, called ulectomy, in order to allow a free path for the tooth to come to occupy its position in the dental arch. Objective: To present ulectomy as a surgical option for the treatment of dental impaction in Primary Health Care. Case report: A 6-year-old female patient came with her parents to the Basic Health Unit in the city of Lajedo-PE, complaining of delayed eruption of permanent teeth. The intraoral clinical examination revealed the absence of elements 11 and 21 and the presence of a thick layer of gingival tissue. The most indicated therapeutic approach was the ulectomy technique. Intraoral and extraoral antisepsis were performed; application of topical anesthetic; infiltrative terminal anesthesia; and elliptical incisions promoting removal of the coronary cap. Hemostasis was promoted by tamponade and no postoperative prescription was required. The patient returned in 15 days, and the onset of eruption of elements 11 and 21 was observed. Conclusion: Ulectomy can be considered a conservative, safe and effective therapeutic method for the resolution of prolonged retention of dental elements in pediatric dentistry. Due to the safety of the procedure, it can be performed in Primary Health Care, as a way of guaranteeing its principles, as long as there is sufficient technical and scientific knowledge to do so.

Dental anomalies in individuals with osteogenesis imperfecta: a systematic review and meta-analysis of prevalence and comparative studies.

Osteogenesis imperfecta (OI) is a rare genetic disorder primarily caused by mutations in the genes involved in the production of type 1 collagen. OI is also known as brittle bone disease. This study aims to describe the prevalence of dental anomalies (except dentinogenesis imperfecta) in individuals with OI, and compare the prevalence of dental anomalies between individuals with and without OI and between individuals with different types of OI. Searches in PubMed, Web of Science, Scopus, Ovid, and gray literature were performed in October 2022. Observational studies (with or without a comparison group) that evaluated the prevalence of dental anomalies in individuals with OI. Data collection and analysis: Data items were extracted by two authors. Quality assessment employing the Joanna Briggs Institute checklists and meta-analyses was conducted. Results were provided in prevalence values and odds ratio (OR) / 95% confidence interval (CI). Strength of evidence was determined. Eighteen studies were included. Most prevalent dental anomalies in individuals with OI included pulp obliteration (46.4%), dental impaction (33.5%), dental impaction of second molars (27%), and tooth agenesis (23.9%). Individuals with OI type III/IV had 20.16-fold greater chance of exhibiting tooth discoloration in comparison with individuals with OI type I (CI: 1.10-370.98). In comparison with the group without OI, the individuals with OI had 6.90-fold greater chance of exhibiting dental impaction (CI: 1.54-31.00). High methodological quality was found in 47% of the studies. Strength of evidence was low or very low. Pulp obliteration, dental impaction, and tooth agenesis were the most prevalent dental anomalies in the OI group. Individuals with OI were more likely to have dental impaction than individuals without OI. Individuals with OI type III/IV (severe-moderate) are more likely to have tooth discoloration than individuals with OI type I (mild).

Characteristics of preoperative and postoperative anxiety in adults undergoing surgical extraction of impacted third molars

Background/Aim: Surgical removal of impacted third molars is associated with possible complications that are primarily comprehended as expected. Increase in incidence and severity of complications is directly related to the depth of impaction, and to the age of the patient as well. The aim of this research was to investigate the possible influence of the treatment duration relating to age and gender of the patients, the occurrence of pain, and the existence of previous anxiety experience connected with surgical wisdom tooth removal. Material and Methods. The study included adults of both gender indicated for surgical removal of impacted third molars. The existence of previous wisdom tooth removal experience was determined during the first examination, and the subjects' anxiety and pain levels were determined pre-, and postoperatively. Results: There were no differences concerning the place of treatment (dental office/operating room) and the duration of surgery. Younger participants showed the lowest levels of preoperative anxiety and the highest levels of postoperative anxiety, and frequently reported postoperative pain. Female participants showed higher levels of preoperative and postoperative anxiety, and also frequently reported postoperative pain. Conclusions: Anxiety and pain scores were lower when there was a previous experience with removal of impacted wisdom teeth.

Management of an impacted maxillary central incisor with surgical exposure and a 2x4 orthodontic appliance: A case Report

Dental impaction or transposition are disorders related to ectopic eruption or failure in tooth eruption, which can affect child physical, mental, and social development. This condition compromises face aesthetics, phonation, and masticatory function. The cause of impaction may vary from physical obstruction in the path of eruption, tooth material arch length discrepancy to malformation of the tooth, but supernumerary teeth are the leading cause. Failure of eruption of maxillary incisors requires early diagnosis and proper treatment planning. General principles of management of the condition include removal of physical obstruction, creation of space, and surgical exposure with or without traction. The rationale of the 2x4 orthodontic treatment of an unerupted tooth depends upon its age, position, etiology, and amount of space in the dental arch. It under the category of interceptive orthodontic procedure to prevent malocclusion near future. The present case report elaborates on case of incisor impaction with different aetiologies and varying ranges of complexity. However, it's far frequently important to continue with a surgical–orthodontic treatment. The inclination of teeth in relation to the midline and the root maturation degree determine prognosis and therapeutic timing. Thus, we are describing a case of 10 yrs. old child with, class 1 molar relationship bilaterally with missing maxillary right central incisor.

Distinct microbiome profiles in convergent wisdom tooth impactions.

Long-term retention of impacted third molars (wisdom teeth) is associated with plaque stagnation and the development of caries on the adjacent surface of the neighboring second molar. While caries and tooth loss are common outcomes of impaction, there is currently insufficient evidence to support the pre-emptive removal of asymptomatic wisdom teeth. Emerging evidence suggests that convergently growing impactions are associated with caries. We have therefore investigated the composition of dental plaque on the distal surface of the mandibular second molar at various impaction angles. We have compared the microbiome of these surfaces at four impaction angulations using short-read sequencing of the bacterial 16S rRNA gene: two convergent (horizontal and mesial) and two divergent (distal and vertical) angulations, and in cases where the wisdom tooth is missing. Horizontal angulations exhibited lower microbial diversity than mesial impactions. Amplicon Sequence Variants (ASVs) associated with Veillonella were significantly more abundant at impactions with angulations toward the midline. Using machine learning, a random forest classifier trained to distinguish microbiome profiles was used to predict the native angulations for a subset of samples, with samples from the two convergent impactions estimated with the greatest accuracy. Differences in microbial diversity were apparent between caries-associated convergent (horizontal and mesial) impacted wisdom teeth, as well as greater abundances of Veillonella ASVs at horizontal impactions.

An imConvNet-based deep learning model for Chinese medical named entity recognition

BackgroundWith the development of current medical technology, information management becomes perfect in the medical field. Medical big data analysis is based on a large amount of medical and health data stored in the electronic medical system, such as electronic medical records and medical reports. How to fully exploit the resources of information included in these medical data has always been the subject of research by many scholars. The basis for text mining is named entity recognition (NER), which has its particularities in the medical field, where issues such as inadequate text resources and a large number of professional domain terms continue to face significant challenges in medical NER.MethodsWe improved the convolutional neural network model (imConvNet) to obtain additional text features. Concurrently, we continue to use the classical Bert pre-training model and BiLSTM model for named entity recognition. We use imConvNet model to extract additional word vector features and improve named entity recognition accuracy. The proposed model, named BERT-imConvNet-BiLSTM-CRF, is composed of four layers: BERT embedding layer—getting word embedding vector; imConvNet layer—capturing the context feature of each character; BiLSTM (Bidirectional Long Short-Term Memory) layer—capturing the long-distance dependencies; CRF (Conditional Random Field) layer—labeling characters based on their features and transfer rules.ResultsThe average F1 score on the public medical data set yidu-s4k reached 91.38% when combined with the classical model; when real electronic medical record text in impacted wisdom teeth is used as the experimental object, the model's F1 score is 93.89%. They all show better results than classical models.ConclusionsThe suggested novel model (imConvNet) significantly improves the recognition accuracy of Chinese medical named entities and applies to various medical corpora.

Speaking Space, Chewing Rotational Denture Movement, OHRQoL, and Patient Expectations for Single-Implant Mandibular Overdentures.

To compare the speaking space, perceived rotational movement during chewing, and oral health-related quality of life (OHRQoL) of elderly people rehabilitated with new conventional complete dentures (CDs) and single-implant mandibular overdentures (SIMOs) using a paired design. Patient expectations for SIMO use were also evaluated. The participants were 22 elderly users of unsatisfactory CDs. They received new sets of conventional CDs, and assessment was performed after 2 months of use. Speaking space was recorded with a kinesiograph while participants read a list of words. Participants were asked two questions about perceived posterior rotational denture movement during chewing. The Dental Impact on Daily Living (DIDL) questionnaire was used to examine OHRQoL, and a visual analog scale was used to quantify participants' SIMO expectations. Subsequently, the mandibular CDs were converted to SIMOs, and the assessment was repeated after 2 months of use. Speaking space and OHRQoL data were submitted to ANOVA and Student t test, and perceived mandibular movement and expectation data were examined using likelihood-ratio chi-square test. The speaking space and perceived rotational movement did not differ between CD and SIMO use. General performance and eating restriction DIDL scores increased after SIMO insertion. Participants' SIMO expectations regarding speaking, cleaning, esthetics, and general aspects were met. Relative to CD use, SIMO use did not change the speaking space or perceived rotational movement when chewing among elderly patients. It improved OHRQoL via enhancement of two DIDL dimensions and met most elderly patients' expectations.