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1.
BMC Oral Health ; 21(1): 180, 2021 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-33827533

RESUMO

BACKGROUND: A dentigerous cyst (DC) is a pathology embracing the crown of an unerupted tooth at risk of malignant transformation. The causal tooth is usually removed together with the cyst. However, if there are orthodontic contraindications for extraction, two questions arise. (1) Which factors favor spontaneous eruption? (2) Which factors imply the necessity of applying orthodontic traction? This systematic review aimed to identify factors conducive/inconducive to the spontaneous eruption of teeth after dentigerous cyst marsupialization. METHODS: In accordance with the PRISMA guidelines, the main research question was defined in the PICO format (P: patients with dentigerous cysts; I: spontaneous tooth eruption after surgical DC treatment; C: lack of a spontaneous tooth eruption after surgical DC treatment; O: determining factors potentially influencing spontaneous tooth eruption). The MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials databases were searched for keywords combining dentigerous/odontogenic/follicular cysts with teeth and/or orthodontics, as well as human teeth and eruption patterns/intervals/periods/durations. The following data were extracted from the qualified articles (4 out of 3005 found initially): the rate of tooth eruption after surgical treatment of the cyst, the age and sex of the patients, the perpendicular projection distance between the top of the tooth cusp and the edge of the alveolar process, tooth angulation, the root formation stage, the cyst area, and the eruption space. The articles were subjected to risk of bias and quality analyses with the ROBINS-I protocol and the modified Newcastle-Ottawa QAS, respectively. Meta-analyses were performed with both fixed and random effects models. The GRADE approach was used to evaluate the quality of the evidence. The systematic review was registered in PROSPERO under ID CRD42020189044. RESULTS: Nearly 62% of DC-associated premolars erupted spontaneously after cyst marsupialization/decompression. Young age (mean = 10 years) and root formation not exceeding 1/2 of its fully developed length were the factors likely to favor spontaneous eruption. CONCLUSION: The small number of published studies, as well as their heterogeneity and the critical risk of bias, did not allow the creation of evidence-based protocols for managing teeth with DC after marsupialization. More high-quality research is needed to draw more reliable conclusions.

2.
Sci Rep ; 11(1): 7594, 2021 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-33828193

RESUMO

In the last decades, several discoveries have uncovered the complexity of mammalian evolution during the Mesozoic Era, including important Gondwanan lineages: the australosphenidans, gondwanatherians, and meridiolestidans (Dryolestoidea). Most often, their presence and diversity is documented by isolated teeth and jaws. Here, we describe a new meridiolestidan mammal, Orretherium tzen gen. et sp. nov., from the Late Cretaceous of southern Chile, based on a partial jaw with five cheek teeth in locis and an isolated upper premolar. Phylogenetic analysis places Orretherium as the earliest divergence within Mesungulatidae, before other forms such as the Late Cretaceous Mesungulatum and Coloniatherium, and the early Paleocene Peligrotherium. The in loco tooth sequence (last two premolars and three molars) is the first recovered for a Cretaceous taxon in this family and suggests that reconstructed tooth sequences for other Mesozoic mesungulatids may include more than one species. Tooth eruption and replacement show that molar eruption in mesungulatids is heterochronically delayed with regard to basal dryolestoids, with therian-like simultaneous eruption of the last premolar and last molar. Meridiolestidans seem endemic to Patagonia, but given their diversity and abundance, and the similarity of vertebrate faunas in other regions of Gondwana, they may yet be discovered in other continents.

3.
Anticancer Res ; 41(4): 2083-2092, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33813418

RESUMO

BACKGROUND/AIM: Numerical aberrations of permanent dentition and dystopic tooth eruption are part of the phenotype of the tumor predisposition syndrome neurofibromatosis type 1 (NF1). In these cases, surplus tooth germs usually develop in the alveolar processes of the jaw. This report attests to the dystopic development of a dysplastic supernumerary tooth in NF1 arising outside the jaw. CASE REPORT: The 8-year-old male patient developed a microdont outside the bone and above the occlusal plane of the retained maxillary right second molar. The supernumerary tooth was completely embedded in oral soft tissue. Hyperplastic oral soft tissue in the molar region and microdont were excised. Specimen of the mucosa surrounding the teeth was interspersed with diffuse and plexiform neurofibroma. The retained upper right first molar emerged spontaneously within a few months after surgery. The upper right second molar did not change position. CONCLUSION: Odontogenesis can take place within tumorous oral mucosa in NF1. Surgical removal of the tumorous mucous membrane facilitates tooth eruption in some cases.


Assuntos
Processo Alveolar/patologia , Neoplasias Bucais/diagnóstico , Neurofibroma Plexiforme/diagnóstico , Neurofibromatose 1/diagnóstico , Erupção Ectópica de Dente/diagnóstico , Processo Alveolar/anormalidades , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Criança , Humanos , Masculino , Neoplasias Bucais/complicações , Neoplasias Bucais/patologia , Neoplasias Bucais/cirurgia , Neurofibroma Plexiforme/complicações , Neurofibroma Plexiforme/patologia , Neurofibroma Plexiforme/cirurgia , Neurofibromatose 1/complicações , Neurofibromatose 1/patologia , Neurofibromatose 1/cirurgia , Anormalidades Dentárias/diagnóstico , Anormalidades Dentárias/etiologia , Anormalidades Dentárias/patologia , Anormalidades Dentárias/cirurgia , Erupção Ectópica de Dente/etiologia , Erupção Ectópica de Dente/cirurgia , Dente Decíduo/anormalidades , Dente Decíduo/diagnóstico por imagem , Dente Decíduo/patologia , Dente Decíduo/cirurgia , Dente Supranumerário/diagnóstico , Dente Supranumerário/etiologia , Dente Supranumerário/patologia , Dente Supranumerário/cirurgia
4.
Wiad Lek ; 74(3 cz 1): 441-449, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33813447

RESUMO

OBJECTIVE: The aim is to determine the clinical and morphological dependencies, which are important for diagnostics, treatment and prediction of outcomes of pathological processes in the region of the LTM with complicated eruption, as based on the study of histopathological changes of paradental tissue (mucous membrane, walls of retromolar pocket, alveolar bone tissue). PATIENTS AND METHODS: Materials and methods: The materials of the study were 34 biopsy specimens of pathologically altered soft tissue and parodontium obtained as a result of pericoronectomy, extraction of the LTM and other surgical interferences performed based on the relevant indications in 28 patients in the region of the LTM with complicated eruption. Morphological and statistical research methods were used. RESULTS: Results: The local pathological processes, which chronologically precede the destructive changes in the hard tissue of a tooth (caries), are developed in patients of both genders with complicated LTM eruption in soft tissue of parodontium and the adjacent bone tissue of the alveolar wall in the majority of cases. As per biopsy examinations, the frequency of the main pathological processes in paradental tissue in case of complicated LTM eruption varies from 25 to 60 % of the number of biopsy specimens and occurs in various combinations in patients with different values of clinical parameters. The correlation relationships between the patients' clinical data and the morphological parameters of damage to paradental tissue are weak, multidirectional and uncertain in the majority of combinations (considering the available number of biopsy specimens studied). The close certain positive dependence between the damage of the squamous epithelium and the inflammation activity in the lamina propria mucosae, covering the tooth: in the vast majority of cases, the presence of damaged epithelium (within the biopsy specimen) is associated with the inflammation of high activity, was established as based on correlation relationships between the morphological parameters of damage to paradental tissue. CONCLUSION: Conclusions: The found pathological changes and the correlations justify surgical tactics on paradental soft and osseous tissues that are directed on the LTM sparing.


Assuntos
Dente Serotino , Erupção Dentária , Feminino , Humanos , Masculino , Dente Molar , Dente Serotino/cirurgia , Membrana Mucosa , Periodonto
5.
Dent J (Basel) ; 9(3)2021 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-33800922

RESUMO

The purpose of this study was to histologically examine the clinically healthy gingiva of patients with altered passive eruption (APE). Five patients with type 1 APE were enrolled. They underwent scaling and polishing and received oral hygiene instructions. After 6 months of supervised plaque control and uninterrupted gingival clinical health (Gingival Index (GI) = 0 and no Bleeding on Probing (BoP)), upper anterior teeth were surgically treated. During the surgical procedure, the excised gingival margin was collected to be histologically examined. In four out of five patients, signs of inflammation including spongiosis and neutrophil exocytosis could be found in the epithelium of the gingival sulcus. Ulceration with exposure of the lamina propria and inflammatory granulation tissue were evident in the most severe cases. Normal density and orientation of collagen fibers could be seen within the superficial and the deep portions of connective tissue, with an increase in size and number of the deep collagen fibers and a reduced laxity of the superficial ones. In conclusion, the clinically healthy gingiva of APE patients showed features compatible with persistent inflammation, possibly due to recurrent traumatisms caused by an incisally placed gingival margin.

6.
J Craniofac Surg ; 32(2): 675-677, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33705007

RESUMO

BACKGROUND: Mandibular distraction osteogenesis is a widely utilized surgical procedure in the pediatric population for the treatment of mandibular retrognathia. Patients with congenital abnormalities may display severe mandibular hypoplasia and associated functional problems. Distraction osteogenesis is effective in alleviating airway obstruction for these patients and is performed early in life, often during the neonatal period and during infancy. However, problems in tooth development may arise as a surgical complication. EVIDENCE REVIEW: A systematic search was conducted in PubMed and EMBASE to identify retrospective studies describing long term outcomes of mandibular distraction osteogenesis on tooth development. Each article was reviewed and relevant data were extracted, collected, and examined according to the type of dental injury, specific tooth effected, and frequency of occurrence. RESULTS: Tooth injuries include positional change (35%), shape alteration/fracture (24%), missing tooth (15%), root injury/malformation (14%), follicle/bud perforation (9%), delayed eruption (2%), and dentigerous cyst (1%). The most commonly affected tooth is the permanent first molar, followed by the primary second molar. The least common tooth affected is the third molar. CONCLUSIONS: Although tooth injuries exist following mandibular distraction osteogenesis in the pediatric population, the risk of pathology and major complications remain relatively low. Technological advancements in presurgical planning can be expected to continue reducing the risk of adverse effects to primary and permanent tooth development.

7.
J Oral Implantol ; 2021 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-33710324

RESUMO

Some authors have recommended that implant-supported single crowns should only contact during heavy clenching. However, a lack of occlusal contact with moderate clenching may cause supra-eruption of antagonist natural teeth. The main objective of this study was to assess changes in the occlusal contacts of posterior implant-supported single crowns with natural antagonist teeth two years after placement. The occlusal schemes of 14 patients who received 16 implant-supported single crowns in molar and premolar regions were assessed in this prospective study. Just after crown placement, at 6 months and after 2 years a silicone maxillomandibular relationship and T-scan records were obtained during the intercuspal position with light and heavy clenching, determined using near half of the maximum force and maximum force respectively. Occlusal contacts were assessed quantitatively and qualitatively in the implant-supported single crowns, contralateral tooth and adjacent tooth; the latter two were used as controls. After six months and two years, no significant variations were observed in any region of the occlusal scheme in any assessments, including silicone record or T-Scan, using light or heavy clenching, and qualitative or quantitative occlusal contact assessment. In this preliminary study, the occlusal scheme did not vary at the intercuspal position two years after placing posterior implant-supported single crowns.

8.
Artigo em Inglês | MEDLINE | ID: mdl-33667345

RESUMO

Sensory dysfunction is the most serious complication that occurs after extracting lower third molars in close proximity to the inferior alveolar nerve (IAN). Even experienced surgeons have difficulties in avoiding nerve damage when the root is anatomically adjacent to the nerve canal. A useful method for reducing nerve damage during extraction is to perform orthodontic extrusion, in which the distance between the nerve and the root increased after applying an orthodontic force on the third molar while extruding the tooth. Here, we report the case of a 37-year-old female who presented with a partially erupted left lower third molar and risk of IAN nerve damage because of close anatomical proximity between the nerve and root. She underwent extraction using a miniscrew placed in the maxilla and a routine orthodontic mechanism using a cross-arch elastic band that induced a 3-mm vertical eruption in the impacted third molar without using complex orthodontic devices. In addition, tilting the dental axis to the lingual side resolved the proximity between the IAN and the tooth, thereby allowing extraction to proceed without major complications.

9.
J Prosthet Dent ; 2021 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-33678439

RESUMO

STATEMENT OF PROBLEM: Vertical eruption of teeth adjacent to an implant has been reported clinically and might affect the esthetic outcome over time. The prevalence of the problem is unclear. PURPOSE: The purpose of this prospective clinical trial was to evaluate the vertical eruption of anterior maxillary teeth adjacent to single-implant crowns after a 3-year follow-up period. MATERIAL AND METHODS: Thirty single dental implants were inserted in maxillary anterior sites including the first premolar. The mean age of the participants at implant-supported crown insertion was 48.4 years (range 23 to 79 years). Each implant was restored with a 1-piece screw-retained ceramic single crown. The vertical changes of 60 adjacent anterior maxillary teeth were evaluated from periapical radiographs and casts at baseline, 6, 12, and 36 months. RESULTS: A global ANOVA test showed statistically significant differences for the outcomes of the distance-implant platform and cement-enamel junction (DPC) (P<.001), crown length distal (P=.021) and mesial (P=.035), implant crown length (P=.022), and incisal edge to edge (P<.001). CONCLUSIONS: Continuous vertical tooth eruption next to a single dental implant was observed in adult participants.

10.
Orthod Craniofac Res ; 24 Suppl 1: 31-38, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33652500

RESUMO

INTRODUCTION: The purpose of this study was to evaluate the long-term position of erupted third molars after maxillary total arch distalization using modified C-palatal plates (MCPPs) in adolescents and to identify factors associated with these positions. SETTING AND SAMPLE POPULATION: Sixty-two third molars (male: 20, female: 42) in Class II patients treated with MCPPs and thirty-nine teeth for the Control group (male: 22, female: 17). MATERIALS AND METHODS: Samples were analyzed using panoramic radiographs taken initially (T0), after treatment (T1) and after >3 years retention (T2). Third molars were classified as downward (Group A, N = 31; males: 12, females: 19) and upward (Group B, N = 31; males: 8, females: 23) based on their vertical position after treatment. Analysis of variance and multiple logistic regression analysis were performed. RESULTS: The vertical position of the third molars of Group A, Group B, and the Control showed a 2.2, 3.5 and 2.7 mm downward movement at T2. However, there was no difference in the amount of third molar eruption among the groups. Regarding factors affecting the vertical distance of the third molar, Age, C8-OP, ∠8-OP and D7-T at the initial affected vertical position of the third molars after molar distalization (P < .05). CONCLUSIONS: Group A and B showed no difference in the third molar eruption during retention after total arch distalization. This study suggests that it might be unnecessary to extract the developing third molar before molar distalization in Class II adolescents.


Assuntos
Má Oclusão de Angle Classe II , Dente Serotino , Adolescente , Cefalometria , Feminino , Humanos , Masculino , Maxila/diagnóstico por imagem , Dente Molar/diagnóstico por imagem , Dente Serotino/diagnóstico por imagem , Dente Serotino/cirurgia , Técnicas de Movimentação Dentária
11.
Am J Orthod Dentofacial Orthop ; 159(3): 305-311, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33641814

RESUMO

INTRODUCTION: The early diagnosis and interception of potential maxillary canine impaction is the most desirable approach for correcting their path of eruption. However, there is still a lack of evidence regarding the effect of rapid maxillary expansion (RME) on labially impacted canines. This study aimed to investigate the age-related effect of RME on labially impacted maxillary canines in order to reduce the risk of their impaction in the mixed dentition and to examine the proper timing of interceptive treatment. METHODS: All patients aged 7-10 years were treated with an RME appliance using the same protocol. The distance to the occlusal plane, axis to the midline, and distribution in different sectors-depending on the patients' age-were evaluated for maxillary canines before and after treatment on panoramic radiographs in order to detect changes in the position of the impacted canines. These geometric measurements in the impacted canines were also validated by observing the nontreated canines at each age. RESULTS: Significant differences existed between the impacted canines and the erupted canines in all 3 categories in all age groups. RME treatment modulated the position of the impacted canines in all age groups. Interestingly, a statistically significant difference before and after RME in all categories was detected in patients aged <8 years. A discriminant analysis also showed a positive association of RME treatment with the risk of labially impacted canines. The standardized regression coefficients showed that the angulation of the maxillary canine was the most important predictor for impaction. CONCLUSIONS: Our findings indicate that RME treatment in the early mixed dentition was effective for managing labially impacted maxillary canines. An age of 7-8 years with early mixed dentition might be the most appropriate timing for therapeutic intervention on the basis of RME treatment for buccal canine impaction.


Assuntos
Técnica de Expansão Palatina , Dente Impactado , Estudos de Casos e Controles , Criança , Dente Canino/diagnóstico por imagem , Humanos , Maxila/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem , Dente Impactado/terapia
12.
J Dent Res ; : 22034521999363, 2021 Mar 03.
Artigo em Inglês | MEDLINE | ID: mdl-33655796

RESUMO

The aims of this study were to 1) determine if continuous eruption occurs in the maxillary teeth, 2) assess the magnitude of the continuous eruption, and 3) evaluate the effects of continuous eruption on the different periodontal parameters by using data from the population-based cohort of the Study of Health in Pomerania (SHIP). The jaw casts of 140 participants from the baseline (SHIP-0) and 16-y follow-up (SHIP-3) were digitized as 3-dimensional models. Robust reference points were set to match the tooth eruption stage at SHIP-0 and SHIP-3. Reference points were set on the occlusal surface of the contralateral premolar and molar teeth, the palatal fossa of an incisor, and the rugae of the hard palate. Reference points were combined to represent 3 virtual occlusal planes. Continuous eruption was measured as the mean height difference between the 3 planes and rugae fix points at SHIP-0 and SHIP-3. Probing depth, clinical attachment levels, gingiva above the cementoenamel junction (gingival height), and number of missing teeth were clinically assessed in the maxilla. Changes in periodontal variables were regressed onto changes in continuous eruption after adjustment for age, sex, number of filled teeth, and education or tooth wear. Continuous tooth eruption >1 mm over the 16 y was found in 4 of 140 adults and averaged to 0.33 mm, equaling 0.021 mm/y. In the total sample, an increase in continuous eruption was significantly associated with decreases in mean gingival height (B = -0.34; 95% CI, -0.65 to -0.03). In a subsample of participants without tooth loss, continuous eruption was negatively associated with PD. This study confirmed that continuous eruption is clearly detectable and may contribute to lower gingival heights in the maxilla.

13.
Ned Tijdschr Tandheelkd ; 128(3): 161-166, 2021 Mar.
Artigo em Holandês | MEDLINE | ID: mdl-33734222

RESUMO

Eruption of mandibular second molars usually occurs around the age of 12. Incomplete eruption of second molars in such young patients can lead to loss of the molars, due to caries, root resorption or periodontal pathology. When a pathology of this kind develops, the treatment option for a mesially impacted molar is often to extract the tooth. If tooth eruption is, however, monitored closely by the dentist and/or orthodontist, early treatment can be considered in order to preserve the tooth. Partially impacted second molars can be placed in a functional anatomical position by surgical uprighting and repositioning. As long as certain conditions are met, this results in sound functionality with preservation of the full dentition. In cases of incomplete eruption, this treatment option should therefore be considered by dentists and orthodontists before extracting the second molars.


Assuntos
Mandíbula , Dente Impactado , Humanos , Dente Molar/cirurgia , Dente Serotino , Erupção Dentária , Técnicas de Movimentação Dentária , Dente Impactado/cirurgia
14.
Oral Maxillofac Surg Clin North Am ; 33(2): 231-238, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33663951

RESUMO

The goals of alveolar cleft repair include (1) stabilization of the maxilla, (2) permitting tooth eruption, (3) eliminating the oronasal fistula, (4) improving aesthetics, and (5) improving speech. Alveolar cleft repair should be considered one of the steps of a larger comprehensive orthodontic management plan. In conjunction with closure of the oronasal fistula, a variety of grafting materials can be used in the alveolar cleft. Autogenous grafts have been found to have greater efficacy compared with allogenic or xenogeneic bone, substitute bone, and alloplasts but with more donor site morbidity.


Assuntos
Fenda Labial , Fissura Palatina , Processo Alveolar/cirurgia , Transplante Ósseo , Fissura Palatina/cirurgia , Estética Dentária , Humanos , Maxila
15.
Angle Orthod ; 2021 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-33749778

RESUMO

Ankylosis of a molar during active growth leads to a significant vertical bone defect, extrusion of the opposing molar, and inclination of adjacent teeth. Treatment timing is an essential factor for the patient's quality of life. Early extraction of the ankylosed molar and protraction of the second molar is challenging because of the difficulty of tooth movement and the uncertainty of the normal eruption of the third molar. In view of the uncertainty of eruption of the mandibular third molar, it is essential to assess the potential for eruption according to the developmental stage of the third molar and to secure sufficient space for eruption. In this case report, a girl with an ankylosed right mandibular first molar and an advanced vertical bone defect was treated via early extraction of the ankylosed molar along with the intrusion of the maxillary molar and mesial root movement of the second molar before the initiation of third molar root formation. Restoration of the vertical bone defect was noted at the end of treatment. In addition, spontaneous eruption of the third molar was observed, which was in contrast to the mesioangular impaction of the contralateral third molar. This case emphasizes the importance of treatment timing to increase the chance of utilization of the third molar.

16.
J Clin Pediatr Dent ; 45(1): 58-62, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-33690831

RESUMO

OBJECTIVE: To determine the prevalence and distribution of premature eruption and agenesis of premolars in a sample of Turkish children. STUDY DESIGN: A sample of 1715 patients aged 5 to 11 years was selected. Panoramic radiographs were used to assess premature eruption and agenesis of premolars. Developmental stage of erupted premolars was assessed using Demirjian's method and selecting prematurely erupted premolars on the basis of clinical eruption with a root length less than half of their final expected root lengths. Statistical analysis was performed using chi-square test (p <.05). RESULTS: One hundred fifteen (6.7%) of 1715 patients presented at least one premolar agenesis with no significant sex difference (56 boys, 59 girls). Mandibular second premolars were the most absent teeth. Multiple agenesis of premolars (3.4%) was more common than single agenesis (3.3%). A total of 85 (5.0%) patients (51 boys, 34 girls; no significant sex difference) had at least one prematurely erupted premolar, and maxillary first premolars were most commonly affected. Early erupted premolars were in stage D or E based on Demirjian's dental formation scale. CONCLUSIONS: The prevalence of premature eruption and agenesis of premolars in Turkish children were 5.0% and 6.7%, respectively. Both conditions are not uncommon and may highlight the need for early diagnosis to prevent subsequent clinical problems.


Assuntos
Anodontia , Odontogênese , Anodontia/epidemiologia , Dente Pré-Molar , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Prevalência , Radiografia Panorâmica , Estudos Retrospectivos
17.
Artigo em Inglês | MEDLINE | ID: mdl-33775652

RESUMO

PURPOSE: Pediatric mandibular fractures are immensely challenging compared to adult fractures. The current update management spectrum ranges from the conservative one in the form of soft diet and regular follow-up, or less invasive surgical intervention by closed reduction and nonrigid fixation, to open reduction and internal fixation with plates and screws. In this study, we investigated the use of a straightforward fabricated mold for the parasymphyseal mandibular fracture in infants with an unerupted dentition. PATIENTS AND METHODS: This prospective study was conducted on 8 infants presenting with parasymphyseal fractures with unerupted dentitions in our specialized trauma center. In the operating room before the induction of anesthesia, the authors used a straightforward plastic airway to create a splint. The curved part was split into 2 transverse halves making 2 U-shaped curved pieces that were utilized as a mold. Intraoperatively, the U-shaped piece was placed over the mandible and stabilized with circummandibular wires. This molded airway is used to stabilize the fracture site for 2-3 weeks. The average period of follow-up was around 6 months. RESULTS: The average time of mandibular fixation was 17.6 ± 2.4 SD (14 to 20) days. The mean of the total operative time was 38.7 ± 3.5 SD minutes, ranging from 35 to 45 minutes. Our infants were observed in the outpatient clinic for 6 months postoperatively during the follow-up period. There were no noticeable complications nor any interference with tooth eruption or mandibular growth. CONCLUSIONS: The results of this study suggest that this technique is straightforward to use and affordable. It does not require a long learning period. It also exhibits the advantage of reducing the cost in many developing countries.

18.
Int J Paleopathol ; 33: 43-54, 2021 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-33647860

RESUMO

OBJECTIVE: To provide a comparative baseline for future studies of oral pathology in domestic livestock and to better understand connections between lesion prevalence and biological context in past animal populations. MATERIALS: Over 1600 sheep and cattle mandibles recovered from archaeological sites in England between 500 and 1300 CE. METHODS: A comprehensive investigation of periodontal disease was conducted based on four characteristics: dental calculus; periosteal new bone formation; alveolar recession; and ante-mortem tooth loss. The anatomical position and severity of these lesions were quantified and correlated against the age of each individual. RESULTS: Two types of periosteal new bone formation were recognized: one in the growing mandibles of young animals, the other in older animals and associated with disease. The incidence of calculus and alveolar recession increase with age. Correlations exist between calculus, alveolar recession and periosteal new bone formation. Disruption caused by the eruption of the P4 is also implied as a contributory factor to the onset of periodontal disease. CONCLUSIONS: When interpreting periodontal disease in zooarchaeological collections it is vital to consider the effect of age as well as environmental and genetic factors. SIGNIFICANCE: This is the first comprehensive zooarchaeological study to investigate the effect of age on periodontal disease. It provides a better understanding of the frequency and presentation of periodontal disease as a baseline for future studies. LIMITATIONS: Cattle mandibles are under-represented due to poor survival. Ideally, radiographs of mandibles with ante-mortem tooth loss would be taken, but this was not possible. SUGGESTIONS FOR FURTHER RESEARCH: The role of genetic factors, diet and environment needs to be better understood.

19.
J Prosthodont ; 30(S1): 12-19, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33783090

RESUMO

PURPOSE: Patients in need of extensive prosthodontic treatment may need restoration of their occlusal vertical dimension (OVD) due to tooth wear, tooth loss, or changes that have occurred to existing prostheses over time. Prosthodontic treatment is based on the clinical application of the available evidence regarding interocclusal distance (IOD), the positional stability of rest vertical dimension (RVD), and the effect of altering the OVD. Hence, the purpose of this consensus document is to examine available data related to IOD, RVD, and alteration of the OVD. MATERIALS AND METHODS: The search was limited to Clinical trials, Randomized Controlled Trials, Systematic Reviews and Meta-analyses. Key words were healthy patient, mean, range, interocclusal rest distance; healthy patient, mean, range, freeway space; and dentistry, interocclusal gap, and no citations appeared. Dentistry, interocclusal distance, revealed 5 not relevant citations. Dentistry, inter occlusal rest space, and dentistry, interocclusal rest distance, both had the same single not relevant citation. Dentistry, freeway space revealed over 7,000 citations. Dentistry, occlusal vertical dimension, revealed 253 citations, 7 of which were related to the search question but only 1 which was different from the previous search. Mandible, rest vertical dimension, age changes, found 7 citations, none relative to the question. Expanding the search to include journal article found 260 citations with only one relevant to the question. Mandible, rest vertical dimension, alteration, harm revealed no citations; mandible, occlusal vertical dimension, alteration, revealed 15 citations, 1 of which was relevant; mandible, occlusal vertical dimension, changes, revealed 75 citations, none of which were relevant; mandible, occlusal vertical dimension, rehabilitation revealed 10 citations, none of which were relevant. Expanding the search strategy to include Journal article, mandible, occlusal vertical dimension, alteration, received 159 citations, 4 of which were relevant; mandible, occlusal vertical dimension, restoration revealed 208 citations, 1 of which was relevant. Numerous other articles were culled by going through the reference lists of the aforementioned articles. RESULTS: For IOD, 27 articles were found relevant to the search question, which confirmed a mean of 3.0 mm with ranges from 1 to 9 mm. Five articles revealed little evidence as to whether the RVD changes during life. For OVD, 20 articles, including 4 systematic reviews, revealed some evidence that skeletal growth continues from mid adolescence into mid adulthood; strong anecdotal evidence that some unopposed teeth will continue to erupt; no clinical evidence to support the concept that abraded teeth in occlusion in a patient with bruxism will undergo continuous eruption; and some evidence from clinical case reports that restoring OVD in patients with severe abrasion is a successful treatment. CONCLUSIONS: There is a range of dimensions for the interocclusal distance (IOD) with many normal dental patients functioning with a higher or lower IOD than the commonly used 3.0 mm average dimension. The resting vertical dimension (RVD) is a 3-dimensional range with little evidence related to changes in the RVD during life. However, aging can cause a decrease in muscle tone which could affect the RVD. The restoration of the OVD can be successfully accomplished if proper diagnosis and treatment planning are performed.


Assuntos
Oclusão Dentária , Mandíbula , Adulto , Consenso , Humanos , Prostodontia , Dimensão Vertical
20.
Odontol. sanmarquina (Impr.) ; 24(1): 45-51, Ene-Mar. 2021.
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1150856

RESUMO

El síndrome de Down en niños se asocia con múltiples alteraciones orofaciales, dentro de ellas se ha mencionado el retraso en la erupción dental, cuya comprensión no es aún del todo conocida. Se realizó una revisión para analizar los conceptos de erupción dental y acerca de la evidencia disponible respecto al retraso en la erupción dental de los niños con síndrome de Down y su relación con la maduración de los dientes o con otros factores sistémicos y locales. Se observó escasez de estudios sobre el tema, sin embargo, con la literatura encontrada se pudo concluir que el retraso de erupción de las piezas dentales parece no tener relación con la maduración de la pieza dental, sino a otros procesos que tienen lugar durante la erupción dental o que puede ser parte del retraso general del crecimiento y del desarrollo que caracteriza al síndrome de Down.


Down syndrome in children is associated with multiple orofacial alterations, among them delayed tooth eruption has been mentioned, the understanding of which is not yet fully known. A review was carried out to analyze the concepts of tooth eruption and the available evidence regarding delayed tooth eruption in children with Down syndrome, and its relationship with tooth maturation or with other systemic and local factors. Few studies were observed on the subject, however, with the found literature it was possible to conclude that the delay in tooth eruption seems not to be related to the maturation of the tooth, but it is related to other processes that take place during tooth eruption or it may be part of the general delay in growth and development that characterizes Down syndrome.

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