Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.821
Filtrar
1.
Artigo em Inglês | MEDLINE | ID: mdl-33819322

RESUMO

The purpose of this study was to evaluate vertical and horizontal alveolar resorption after the extraction of eight single maxillary molars using solvent-dehydrated bone allograft (Puros) covered with a nonresorbable membrane for ridge preservation. At implant placement 4 months later, ridge dimensions were measured clinically and radiographically and compared to baseline, and a histologic analysis was performed. The mean buccal height decreased by 1.51 mm at midpoint, 0.88 mm mesially, and 1.16 mm distally. The implants were placed without additional ridge augmentation, and six of eight required an internal sinus elevation. Within the limits of this study, this technique succeeded in preserving the alveolar bone.


Assuntos
Aumento do Rebordo Alveolar , Tomografia Computadorizada de Feixe Cônico Espiral , Aloenxertos , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Transplante Ósseo , Humanos , Dente Molar/diagnóstico por imagem , Dente Molar/cirurgia , Projetos Piloto , Politetrafluoretileno , Solventes , Extração Dentária , Alvéolo Dental/cirurgia
2.
Artigo em Inglês | MEDLINE | ID: mdl-33819328

RESUMO

A postextraction socket is always open to different treatment possibilities. A straightforward clinical classification may help evaluate which surgical approach is best suited for the case being treated. Four different classes are defined on the basis of the local anatomy of the site, available bone volume, and soft tissue level. For every clinical situation, either immediate placement, early placement, alveolar ridge preservation, or staged approach can be selected as a treatment modality according to the classifications listed.


Assuntos
Perda do Osso Alveolar , Aumento do Rebordo Alveolar , Processo Alveolar/cirurgia , Assistência Odontológica , Humanos , Extração Dentária , Alvéolo Dental/diagnóstico por imagem , Alvéolo Dental/cirurgia
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.
BMC Oral Health ; 21(1): 201, 2021 04 20.
Artigo em Inglês | MEDLINE | ID: mdl-33879162

RESUMO

BACKGROUND: We previously reported similar efficacies of alveolar ridge preservation (ARP) on single extraction socket with two different E. coli derived recombinant human bone morphogenetic protein-2 (rhBMP-2) delivery systems (Cowell BMP, Cowell medi Co, Busan, Korea; ß-tricalcium phosphate and hydroxyapatite particle & O-BMP, Osstem Implant Co, Busan, Korea; absorbable collagen sponge). After the trial, we completed implant therapy and observed over an average of 3 years. This follow-up study was performed retrospectively to compare result of implant treatment at the preserved alveolar ridge site. METHODS: Patients who underwent extraction of single tooth and received ARP with one of two rhBMP-2 delivery systems from October 2015 to October 2016 were enrolled. Twenty-eight patients (Group 1: Cowell BMP 14; Group 2: O-BMP 14) who underwent implant therapy and prosthetic treatment were included in study. Stability and marginal bone loss (MBL) of each implant were collected from medical charts and radiographs, and analyzed. The survival and success rates of implants were calculated. RESULTS: The primary implant stability represented by implant stability quotient (ISQ) for Groups 1 and 2 was 69.71 and 72.86, respectively. The secondary implant stability for Groups 1 and 2 was 78.86 and 81.64, respectively. Primary and secondary stabilities were not statistically different (P = 0.316 and 0.185, respectively). MBL at the latest follow-up was 0.014 mm in Group 1 over 33.76 ± 14.31 months and 0.021 mm in Group 2 over 40.20 ± 9.64 months, with no significant difference (P = 0.670). In addition, the success rate of implants was 100% (14/14) in Group 1 and 92.9% (13/14) in Group 2, with survival rate of 100% (14/14) in Group 1 and 92.9% (13/14) in Group 2. CONCLUSIONS: We confirmed good prognosis in both groups as a result of implant therapy after ARP with each of two rhBMP-2 carriers.


Assuntos
Aumento do Rebordo Alveolar , Implantes Dentários para Um Único Dente , Implantes Dentários , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Proteína Morfogenética Óssea 2 , Escherichia coli , Seguimentos , Humanos , Prognóstico , Proteínas Recombinantes , República da Coreia , Estudos Retrospectivos , Extração Dentária , Alvéolo Dental/cirurgia , Fator de Crescimento Transformador beta
5.
BMC Oral Health ; 21(1): 134, 2021 03 19.
Artigo em Inglês | MEDLINE | ID: mdl-33740958

RESUMO

BACKGROUND: This study aimed to explore whether compensatory remodeling of the alveolar bone surface occurred during the buccal palatal movement of orthodontic teeth. We preliminarily explored whether corticotomy could activate or accelerate osteogenesis in the alveolar bone surface by measuring the expression of TGF-ß1 (transforming growth factor-ß1), which can facilitate the proliferation and differentiation of osteoblasts and regulate the maturity and formation of bone. METHODS: Sixty 10-week-old male Wistar rats were selected. In the orthodontic group, 20 rats were implanted with a constriction device between the maxillary first molars under general anesthesia. In the corticotomy group, 20 rats were implanted with a constriction device, and a palatal incision was made to penetrate the cortical bone. In the control group, 20 rats underwent no experimental operation except general anesthesia. After 1, 3, 5 and 7 days, the maxillary first molars and the surrounding alveolar bone were harvested, and coronal sections containing the apical mesial buccal root were prepared and observed using tetracycline fluorescence, HE staining and immunohistochemical staining for TGF-ß1. Image-Pro Plus software was used to assess the immunohistochemical results, and SPSS 22.0 statistical software was used to analyze variance and perform the LSD test. RESULTS: The tetracycline fluorescence results showed that in the periosteum near the apical region, an obvious fluorescence signal was observed in the orthodontic group and the corticotomy group compared with the control group. In the orthodontic group and corticotomy group, HE staining showed that the morphology was similar to cube-shaped. The immunohistochemical results showed that TGF-ß1 was significantly increased in the periosteum near the apical region in the orthodontic group and corticotomy group, and there were significant differences among the three groups. In addition, the expression of TGF-ß1 in the periosteum in the orthodontic group and the corticotomy group gradually increased over time, reaching a peak on day 5 and slightly decreasing on day 7. CONCLUSION: Osteogenesis occurred on the alveolar bone surface during the buccal palatal movement of orthodontic teeth, and corticotomy had a positive effect, and TGF-ß1 was involved in this process.


Assuntos
Processo Alveolar , Técnicas de Movimentação Dentária , Processo Alveolar/cirurgia , Animais , Masculino , Dente Molar/cirurgia , Osteogênese , Ratos , Ratos Wistar
6.
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
7.
BMC Oral Health ; 21(1): 63, 2021 02 11.
Artigo em Inglês | MEDLINE | ID: mdl-33573644

RESUMO

BACKGROUND: The shrinkage of alveolar bone dimensions after tooth extraction is a well-known issue. This clinical phenomenon poses a challenge for clinicians aiming at implant-prosthetic treatment. BonMaker® ATB is a novel autogenous bone grafting material, produced by the mechanical and chemical processing of natural teeth. This pilot case report aims at providing a clinical, radiographical, and histological evaluation of the safety and efficacy of Bonmaker ATB powder in the treatment of EDS class 3-4 postextraction sockets with alveolar ridge preservation. METHODS: A total of 9 teeth were extracted from 5 patients. The extracted teeth were prepared immediately with the Bonmaker® device. The extraction sockets were filled up with ATB powder. Six months after extraction, standardized intraoral x-rays and CBCT scans were performed. Re-entry was performed under local anaesthesia. Core biopsies were harvested for histological analysis and implants were placed. RESULTS: Horizontal alveolar dimension loss occurred, even though ARP was performed, but the horizontal shrinkage was moderate. Vertical dimensions did not show loss of volume, but increased defect fill. Core biopsies showed ATB particles surrounded by newly formed bone and connective tissue. According to histomorphometric analysis, the harvested samples contained 56% of newly formed bone on average, and only a mean of 7% of non-remodelled ATB material was observed. CONCLUSION: The preliminary clinical, radiographical, and histological results of Bonmaker® autogenous tooth graft therapy indicate that ATB may be safely and successfully used as a grafting material for ARP. Optimal graft incorporation and histologically proven effective remodelling, as well as uneventful wound healing support the clinical application of ATB to minimize post-extraction hard tissue loss. Further research is needed to exploit the full potential of ATB and to evaluate the long-term peri-implant hard and soft tissue stability of ATB-treated post-extraction sites.


Assuntos
Perda do Osso Alveolar , Aumento do Rebordo Alveolar , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Transplante Ósseo , Humanos , Minerais , Extração Dentária , Alvéolo Dental/diagnóstico por imagem , Alvéolo Dental/cirurgia
8.
Am J Orthod Dentofacial Orthop ; 159(3): 312-320, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33526298

RESUMO

INTRODUCTION: This study investigated the prevalence of and risk factors for alveolar fenestration and dehiscence in the anterior teeth of Chinese patients with skeletal Class III malocclusion. METHODS: This study included clinical and radiographic examinations and intraoperative observations of 460 anterior teeth from 54 patients who underwent corticotomy and periodontal regenerative surgery before orthodontic treatment. Fenestration and dehiscence were detected and recorded during open-flap surgery. Univariate and multivariate analyses were performed to assess relationships between fenestration and dehiscence and age, sex, history of previous orthodontic treatment, mandibular plane angle, dentition, tooth position, sagittal root position, periodontal biotype, gingival recession, width of keratinized gingiva, and width of the basal bone. RESULTS: The prevalence of buccal alveolar bone defects was 16.1% (fenestration) and 20.7% (dehiscence) at the tooth level. Multivariate logistic regressions showed that fenestration was significantly associated with tooth position (canine vs central incisor, odds ratio [OR] = 3.324; P = 0.006; lateral incisor vs central incisor, OR = 5.588; P  <0.001), and sagittal root position (buccally positioned vs centrally positioned, OR = 5.865; P = 0.025). Dehiscence was significantly associated with dentition (mandible vs maxilla, OR = 11.685; P  <0.001), tooth position (canine vs central incisor, OR = 3.863; P = 0.007), age (OR = 1.227; P = 0.010), sex (male vs female, OR = 5.530; P = 0.026), and history of orthodontic treatment (yes vs no, OR = 4.773; P = 0.028). CONCLUSIONS: Buccally positioned teeth in the osseous housing, lateral incisors, and canines were more likely to exhibit alveolar fenestration. Mandibular teeth and canines, patients who were older, were male, and had a history of orthodontic treatment, were more likely to exhibit alveolar dehiscence.


Assuntos
Processo Alveolar , Tomografia Computadorizada de Feixe Cônico , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , China/epidemiologia , Feminino , Humanos , Masculino , Mandíbula , Prevalência , Fatores de Risco
9.
Clin Implant Dent Relat Res ; 23(1): 61-72, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33438320

RESUMO

BACKGROUND: Customized sealing socket abutment (SSA) has been claimed to optimize the peri-implant hard and soft tissues in type 1 implant placement. However, the evidence to claim the benefits of this technique over the use a conventional healing abutment remains weak. PURPOSE: The aim of this retrospective study was to provide a 3D-radiographic evaluation of hard tissues changes following immediate implant placement in molar sites combined to ARP technique and installation of SSA. MATERIALS AND METHODS: Baseline and follow-up (FU) CBCTs (from 1 to 5 years) of 26 patients were collected and included in the study. Baseline and FU CBCTs were superimposed and horizontal and vertical bone changes were assessed. RESULTS: A total of 26 patients and 27 implants were included. Horizontal bone remodeling was not significant in any of the measured areas except in the most cervical level, where a mean bone remodeling of 0.73 mm was found. Proximal and buccal vertical bone changes were not significant. CONCLUSIONS: Within the limits of a retrospective study, dimensional alveolar ridge changes 1 to 5 years after immediate implant placement in molar sites with simultaneous ARP technique and installation of SSA seem to be very limited.


Assuntos
Perda do Osso Alveolar , Aumento do Rebordo Alveolar , Implantes Dentários , Perda do Osso Alveolar/diagnóstico por imagem , Perda do Osso Alveolar/etiologia , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Humanos , Estudos Retrospectivos , Extração Dentária/efeitos adversos , Alvéolo Dental/diagnóstico por imagem , Alvéolo Dental/cirurgia
10.
J Clin Periodontol ; 48(3): 464-477, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33316099

RESUMO

OBJECTIVE: To verify whether ridge preservation is effective in the reduction of dimensional loss and in bone formation compared to spontaneous healing in extraction sockets of periodontally compromised teeth. METHODS: Twenty-six subjects requiring tooth extraction for stage III/IV periodontitis were randomly assigned to one of two interventions: alveolar ridge preservation using collagenated bovine bone mineral and a resorbable collagen membrane (test, RP) or spontaneous healing (control, SH). Six months later, postoperative cone-beam computed tomography (CBCT) was performed to measure the linear and volumetric changes of the sockets compared to baseline scans. Biopsies were retrieved at the implant site for histomorphometric calculations. Nonparametric tests were applied for statistical analysis. RESULTS: Significantly less shrinkage occurred in RP compared to SH, mainly in the crestal zone. The width loss difference between groups was 3.3 mm and 2.2 mm at 1 mm and 3 mm below the crest, respectively (p < .05). RP yielded a gain in socket height of 0.25 mm, whereas a loss of -0.39 mm was observed in SH (p < .05). The percentage of volume loss recorded in RP was also less than that recorded in SH (-26.53% vs -50.34, p < .05). Significantly less bone proportion was detected in biopsies from RP (30.1%) compared with SH (53.9%). A positive association between baseline bone loss and ridge shrinkage was found in SH but not in RP. CONCLUSION: Ridge preservation in extraction sockets of periodontally compromised teeth was effective in reducing the amount of ridge resorption.


Assuntos
Perda do Osso Alveolar , Aumento do Rebordo Alveolar , Perda do Osso Alveolar/diagnóstico por imagem , Perda do Osso Alveolar/cirurgia , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Animais , Bovinos , Extração Dentária , Alvéolo Dental/diagnóstico por imagem , Alvéolo Dental/cirurgia
11.
J Periodontal Res ; 56(2): 298-305, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33314140

RESUMO

BACKGROUND AND OBJECTIVE: Following tooth extraction, bone resorption is especially severe in cases complicated with buccal dehiscence bone defects. To minimize this, various bone graft materials have been used for alveolar ridge preservation. This study aimed to evaluate additional effects of the concomitant use of recombinant human fibroblast growth factor-2 (rhFGF-2) with ß-tricalcium phosphate (ß-TCP) on ridge preservation in a dehiscence defect model after tooth extraction in dogs. MATERIALS AND METHODS: The maxillary first premolars of six beagle dogs were extracted and dehiscence defects of 4 × 4 × 5 mm (mesio-distal width × bucco-palatal width × depth) were created. Bilateral defects were filled with ß-TCP combined with 0.3% (w/v) rhFGF-2 (test sites) or the scaffold alone (control sites). Twelve weeks post-surgery, histologic and histometric evaluations were performed. RESULTS: Morphological measurements using micro-computed tomography revealed a significantly greater bone volume at the test sites (48.9 ± 9.06 mm3 ) than at the control sites (38.8 ± 7.24 mm3 ). Horizontal widths of the alveolar ridge at the coronal and middle position at the test sites (2.18 ± 0.71 mm, 2.93 ± 0.53 mm) were significantly greater than those at the control sites (1.47 ± 0.41 mm, 2.36 ± 0.45 mm, respectively). Regarding the histological parameters, the occupation rate of mineralized bone in the original defects was slightly higher at the test sites (44.07 ± 10.19%) than that at the control site (41.15 ± 6.56%). CONCLUSIONS: These results indicate that the adjunct use of rhFGF-2 with ß-TCP is effective for alveolar ridge preservation in fresh extraction sockets with dehiscence defects.


Assuntos
Perda do Osso Alveolar , Fator 2 de Crescimento de Fibroblastos , Perda do Osso Alveolar/cirurgia , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Animais , Fosfatos de Cálcio/uso terapêutico , Cães , Fator 2 de Crescimento de Fibroblastos/uso terapêutico , Humanos , Extração Dentária/efeitos adversos , Alvéolo Dental/cirurgia , Microtomografia por Raio-X
12.
Am J Orthod Dentofacial Orthop ; 159(2): e123-e134, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33342675

RESUMO

INTRODUCTION: The aim of this pilot study was to evaluate the effect of the timing of postoperative orthodontic force application on bone remodeling during tooth movement into surgical alveolar defects with bone grafts in beagle dogs. METHODS: Six beagle dogs underwent surgery for buccal dehiscence-type defects (width, 5 mm; height, 6 mm) on the distal root of maxillary second premolars bilaterally for 12 defects. After 1-month healing, bone-augmentation procedures were undertaken at the dehiscence defects. The second premolars were protracted buccally for 6 weeks into the surgical sites immediately (F-0), at 4 weeks (F-4), or 8 weeks (F-8) after grafting. Orthodontic tooth movement was monitored using digital models. Remodeling of alveolar bone was evaluated by histology, histomorphometry, immunohistochemistry, microcomputed tomography, and fluorescence microscopy. RESULTS: Group F-0 showed significant expansion (mean, 2.42 mm) and tipping (mean, 9.03°) after completing orthodontic tooth treatment. The vertical bone defect was significantly lower in groups F-4 and F-8 than that in group F-0 (mean, 2.1, 2.7, and 4.5 mm, respectively). In group F-4, the formation of new bone and mineralization were significantly greater than those in groups F-0 and F-8 (P <0.05). Group F-4 showed a minimal amount of bone-material remnants. Immunohistochemistry showed the highest expression of collagen-1 and osteopontin in group F-4, followed by group F-8 and group F-0, which demonstrated high osteoblast activity and enhanced bone remodeling in group F-4. CONCLUSIONS: Orthodontic force application at 4 weeks after an augmentation procedure provided the best functional stimulation for an alveolar bone graft. This strategy enhanced new-bone regeneration and degradation of bone substitutes and, eventually, promoted bone remodeling in the bone-grafted area.


Assuntos
Processo Alveolar , Técnicas de Movimentação Dentária , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Animais , Regeneração Óssea , Transplante Ósseo , Cães , Projetos Piloto , Microtomografia por Raio-X
13.
Braz Dent J ; 31(5): 458-465, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33146327

RESUMO

This study aims to evaluate the post-extraction alveolar bone reconstruction amongst 12 patients exhibiting loss of buccal bone plate in a tooth of the anterior region of the maxilla using the prosthetically-driven alveolar reconstruction technique (PDAR). In PDAR, a partial fixed provisional prosthesis (PFPP [conventional or adhesive]) with a specially designed pontic maintains the clot in a mechanically stable position during alveolar regeneration. Moreover, the pontic design, in hourglass shape and located in the subgingival area, also prevents gingival margins from collapsing. Gingival recession was evaluated through the 6-month healing period. Cone beam computed tomography (CBCT) was performed 1 month before and 8 months after PDAR treatment. For the primary outcome, in the panoramic imaging, the central area of bone defect in each tooth was selected for linear measurements. Measurements of the vertical buccal bone gain and the gain in thickness in the alveolar bone crest were obtained 8 months after PDAR. Descriptive statistics and intraclass correlation coefficient analysis were conducted. After treatment, all patients showed bone formation (a mean vertical gain of 7.1±3.7 mm, associated with a horizontal mean gain of 4.5±1.4 mm in the alveolar bone crest). The intraclass correlation coefficient for the measurements performed using CBCT was 0.999. No gingival recession, greater than 1 mm, was observed. Lower-morbidity procedures without the use of biomaterials may be a useful in post-extraction alveolar ridge regeneration and/or preservation. PDAR promoted alveolar bone formation without flaps, grafts and membranes.


Assuntos
Perda do Osso Alveolar , Alvéolo Dental , Perda do Osso Alveolar/diagnóstico por imagem , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Tomografia Computadorizada de Feixe Cônico , Humanos , Maxila , Estudos Retrospectivos , Extração Dentária
14.
Stomatologiia (Mosk) ; 99(5): 46-49, 2020.
Artigo em Russo | MEDLINE | ID: mdl-33034176

RESUMO

The results of a comparative assessment of the state of hemomicrocirculation and oxygen metabolism in the mucous membrane of the alveolar crest after contour plastics of the gums during dental implantation using a connective tissue graft from the upper jaw, a connective tissue transplant from the palate and the collagen matrix collagen matrix are presented. During contouring with the use of connective tissue graft (CTG) from the upper jaw and collagen matrix in the mucous membrane of the alveolar mandible, the level of tissue blood flow decreases, which characterizes the development of ischemia, which is stopped after 3 weeks, when using a connective tissue graft (CTG) from the palatine, the level of tissue blood flow rises, which indicates the development of hyperemia, which is stopped for more than 3 weeks. According to oximetry data after contouring with the use of various surgical techniques, the level of oxygenation and oxygen metabolism is reduced by 8-38%, which characterizes the development of hypoxia, which is stopped after 3 weeks when using CTG from the hillock of the upper jaw and collagen matrix for more than 3 weeks when applying CTG from the palatine.


Assuntos
Retração Gengival , Processo Alveolar/cirurgia , Tecido Conjuntivo , Implantação Dentária , Retração Gengival/cirurgia , Humanos , Membrana Mucosa
15.
Rev. ADM ; 77(5): 252-256, sept.-oct. 2020. ilus
Artigo em Espanhol | LILACS | ID: biblio-1146848

RESUMO

Una de las causas de la evolución de la periodontitis es la formación de defectos óseos y pérdida de inserción clínica. Una manera de eliminar el defecto intraóseo y su bolsa periodontal es eliminar las paredes de hueso que componen el defecto para colocar el complejo dentogingival en una posición más apical. La cirugía ósea es un procedimiento periodontal resectivo que involucra la modificación del tejido óseo del soporte dental, la cual es una modalidad del tratamiento periodontal quirúrgico que puede utilizarse para eliminar eficazmente los defectos óseos periodontales para estabilizar la inserción periodontal. El objetivo del presente estudio es realizar una revisión de la literatura sobre las consideraciones actuales, técnicas y principios de la cirugía ósea resectiva en el paciente periodontalmente comprometido (AU)


One of the causes of the evolution of periodontitis is the formation of bone defects and loss of clinical attachment, where one way to eliminate the intraosseous defect and its periodontal pocket is to eliminate the bone walls that make up the defect to place the dentogingival complex in a more apical position. Bone surgery is periodontal surgery that involves the modification of the supporting bone tissue of the teeth, which is a modality of surgical treatment that can be used to effectively eliminate periodontal defects and stabilize the periodontal insertion. The aim of the present study is to conduct a literature review about the considerations, techniques and principles of resective bone surgery in the periodontally compromised patient (AU)


Assuntos
Humanos , Periodontite/cirurgia , Perda do Osso Alveolar/cirurgia , Processo Alveolar/cirurgia , Osteotomia/métodos , Bolsa Periodontal/cirurgia , Retalhos Cirúrgicos , Aumento da Coroa Clínica/métodos
16.
Med. oral patol. oral cir. bucal (Internet) ; 25(5): e565-e575, sept. 2020. tab, graf
Artigo em Inglês | IBECS | ID: ibc-196511

RESUMO

BACKGROUND: Many studies have addressed socket preservation, though fewer publications considering buccal wall loss can be found, since the literature typically considers sockets with four walls. A systematic review was made on the influence of type II buccal bone defects, according to Elian's Classification, in socket grafting materials upon volumetric changes in width and height. MATERIAL AND METHODS: An electronic and manual literature search was conducted in accordance to PRISMA statement. The search strategy was restricted to randomized controlled trials (RCTs) and controlled clinical trials (CCTs) describing post-extraction sockets with loss of buccal wall in which alveolar ridge preservation (ARP) was carried out in the test group and spontaneous healing of the socket (SH) was considered in the control group. RESULTS: The search strategy yielded 7 studies. The meta-analysis showed an additional bone loss of 2.37 mm in width (p > 0.001) and of 1.10 mm in height (p > 0.001) in the absence of ARP. The reconstruction of the vestibular wall was not evaluated in any study. The results also showed moderate to great heterogeneity among the included studies in terms of the changes in width and height. CONCLUSIONS: Despite the heterogeneity of the included studies, the results indicate a benefit of ARP versus SH. Further studies are needed to determine the volumetric changes that occur when performing ARP in the presence of a buccal bone wall defect


No disponible


Assuntos
Humanos , Processo Alveolar/cirurgia , Extração Dentária/métodos , Boca/cirurgia , Alvéolo Dental/cirurgia , Ensaios Clínicos como Assunto , Substitutos Ósseos/uso terapêutico , Preservação Biológica
17.
J Stomatol Oral Maxillofac Surg ; 121(5): 473-477, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32835859

RESUMO

BACKGROUND AND METHOD: The aim of this prospective study was to evaluate the adherence frequency of Candida albicans and non-albicans Candida species in newborn babies with Cleft Lip and Palate (CLP) who receive presurgical orthopedic therapy with Nasoalveolar Molding (NAM) appliances. This study comprised of 25 CLP newborns including 8-right unilateral, 8-left unilateral and 7-bilateral CLP. First swab samples were taken from the hard palate when the baby was referred and renewed after 3 days. Following the 7th day of delivery of NAM appliance, the swab samples were retaken from both the hard palate and the NAM appliance. Samples were renewed with 2-month intervals. The last swab samples were taken one month after the surgery. Oral swabs were cultured on CHROMagar Candida medium for the growth of yeasts. RESULTS: There were no statistically significant differences between the time points regarding C. albicans proliferation frequency and severity rates on the palate. No significant difference was found due to the type of cleft and sex in terms of candidal colonization. A constant increase in proliferation frequency of non-albicans on the palatal mucosa was observed between all of the time points. Although the results were insignificant, there was a constant increase in C. albicans proliferation which presented a decrease following primary lip surgery. CONCLUSION: The appliance might not only cause an increase in the colonization of C. albicans but also provide the continuation of the colonization. Therefore, mouth cleaning is important even after primary lip surgery.


Assuntos
Fenda Labial , Fissura Palatina , Processo Alveolar/cirurgia , Candida albicans , Fenda Labial/epidemiologia , Fenda Labial/cirurgia , Fissura Palatina/epidemiologia , Fissura Palatina/cirurgia , Humanos , Recém-Nascido , Nariz/cirurgia , Estudos Prospectivos
18.
Int J Oral Maxillofac Implants ; 35(4): 721-730, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32724923

RESUMO

PURPOSE: The aim of this study was to explore the effect of preventing first-stage wound dehiscence with new types of incision and flap design and to evaluate the effect of wound dehiscence on the bone resorption of the autogenous bone ring graft. MATERIALS AND METHODS: In six beagle dogs, the second and fourth premolars on the bilateral mandible were extracted. After 3 months, on the left extraction sites, conventional alveolar crest incisions were made and the full-thickness flaps were elevated. However, on the right sites, the incisions were made at the mucogingival junction, the split-thickness flaps were elevated toward the lingual side, and the periosteum was elevated toward the buccal side. Then, Straumann implants (. 3.3, length 8 mm) were placed with simultaneous autogenous bone ring grafting. Next, the wounds on the left side were closed with periosteal releasing on buccal flaps conventionally, but the semi-thickness flaps on the right side were sutured with the elevated periosteum. After 3 months, the animals were euthanized, and the harvested samples were analyzed using microcomputed tomography and histology. RESULTS: The incidence rate of wound dehiscence in the new incision group was 16.7%, which was significantly lower than that in the conventional incision group (75%). There was hardly any vertical bone loss of the bone ring in the samples without wound dehiscence, but in wound dehiscence samples, severe bone loss, 2.47 ± 0.17 mm, was found on the buccal side of the bone ring, which was significantly higher than that on the lingual, mesial, and distal sides, 1.37 ± 0.14 mm, 1.00 ± 0.15 mm, and 1.03 ± 0.05 mm, respectively. CONCLUSION: The use of a mucogingival junction incision and split-thickness flap design can effectively prevent first-stage wound dehiscence in autogenous bone ring grafting, which plays a key role in bone resorption of the graft.


Assuntos
Implantes Dentários , Processo Alveolar/cirurgia , Animais , Transplante Ósseo , Implantação Dentária Endo-Óssea , Cães , Mandíbula/cirurgia , Extração Dentária , Microtomografia por Raio-X
19.
J Int Acad Periodontol ; 22(3): 109-116, 2020 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-32655036

RESUMO

AIMS: This study aimed to determine the dimensional change in the alveolar ridge after using an anodized titanium foil (Tseal) in association with bovine bone (BB) grafting in damaged extraction sockets by cone-beam computerized-tomography. MATERIALS AND METHODS: Fifteen patients who had one hopeless tooth with over 80% of the buccal wall lost were selected and then the teeth were carefully extracted. The alveolar socket was filled with bovine bone and the Tseal was trimmed and adapted over the bone crest. The primary outcome variable was the change in the alveolar dimension (AD) measurements between baseline (T1) and 6 months (T2) after extraction in three points of analysis, 1mm, 3mm and 5mm below the palatal bone crest. RESULTS: Bone regeneration was observed to occur between 87% and 116% of the AD assessed at the baseline. No statistical differences were observed. The mean AD value varied from 7.82±2.75 mm (T1) to 8.02±2.43 mm (T2) in the 1 mm point, from 7.99±2.67 mm to 8.71±2.26 mm to 3 mm and 8.56±2.60 mm to 9.00±2.52 mm at 5 mm area. CONCLUSION: Bovine bone graft in association with Tseal achieved horizontal reconstruction of the alveolar crest in compromised socket within 6 months after surgery.


Assuntos
Perda do Osso Alveolar , Aumento do Rebordo Alveolar , Perda do Osso Alveolar/cirurgia , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/cirurgia , Animais , Bovinos , Humanos , Estudos Prospectivos , Titânio , Extração Dentária , Alvéolo Dental/diagnóstico por imagem , Alvéolo Dental/cirurgia
20.
BMC Oral Health ; 20(1): 178, 2020 06 29.
Artigo em Inglês | MEDLINE | ID: mdl-32600405

RESUMO

BACKGROUND: The aim of this prospective clinical study was to investigate differences between virtually planned and clinically achieved implant positions in completely template-guided implant placements as a function of the tooth area, the use of alveolar ridge preservation, the implant length and diameter, and the primary implant stability. METHODS: The accuracy of 48 implants was analyzed. The implants were placed in a completely template-guided manner. The data of the planned implant positions were superimposed on the actual clinical implant positions, followed by measurements of the 3D deviations in terms of the coronal (dc) and apical distance (da), height (h), angulation (ang), and statistical analysis. RESULTS: The mean dc was 0.7 mm (SD: 0.3), the mean da was 1.4 mm (SD: 0.6), the mean h was 0.3 mm (SD: 0.3), and the mean ang was 4.1° (SD: 2.1). The tooth area and the use of alveolar ridge preservation had no significant effect on the results in terms of the implant positions. The implant length had a significant influence on da (p = 0.02). The implant diameter had a significant influence on ang (p = 0.04), and the primary stability had a significant influence on h (p = 0.02). CONCLUSION: Template-guided implant placement offers a high degree of accuracy independent of the tooth area, the use of measures for alveolar ridge preservation or the implant configuration. A clinical benefit is therefore present, especially from a prosthetic point of view. TRIAL REGISTRATION: German Clinical Trial Register and the International Clinical Trials Registry Platform of the WHO: DRKS00005978 ; date of registration: 11/09/2015.


Assuntos
Processo Alveolar/cirurgia , Implantação Dentária Endo-Óssea , Implantes Dentários , Dente/diagnóstico por imagem , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Masculino , Estudos Prospectivos , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...