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1.
Int J Oral Sci ; 16(1): 34, 2024 May 08.
Artículo en Inglés | MEDLINE | ID: mdl-38719817

RESUMEN

Accurate segmentation of oral surgery-related tissues from cone beam computed tomography (CBCT) images can significantly accelerate treatment planning and improve surgical accuracy. In this paper, we propose a fully automated tissue segmentation system for dental implant surgery. Specifically, we propose an image preprocessing method based on data distribution histograms, which can adaptively process CBCT images with different parameters. Based on this, we use the bone segmentation network to obtain the segmentation results of alveolar bone, teeth, and maxillary sinus. We use the tooth and mandibular regions as the ROI regions of tooth segmentation and mandibular nerve tube segmentation to achieve the corresponding tasks. The tooth segmentation results can obtain the order information of the dentition. The corresponding experimental results show that our method can achieve higher segmentation accuracy and efficiency compared to existing methods. Its average Dice scores on the tooth, alveolar bone, maxillary sinus, and mandibular canal segmentation tasks were 96.5%, 95.4%, 93.6%, and 94.8%, respectively. These results demonstrate that it can accelerate the development of digital dentistry.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Tomografía Computarizada de Haz Cónico/métodos , Humanos , Proceso Alveolar/diagnóstico por imagen , Procesamiento de Imagen Asistido por Computador/métodos , Inteligencia Artificial , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Mandíbula/diagnóstico por imagen , Mandíbula/cirugía , Diente/diagnóstico por imagen
2.
Int J Oral Implantol (Berl) ; 17(2): 189-198, 2024 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-38801332

RESUMEN

Maxillary sinus grafting is a predictable regenerative technique to facilitate maxillary posterior implant placement when there is insufficient vertical bone height inferior to the maxillary sinuses to allow placement of implants of adequate dimensions. It enables an increase in vertical bone height, which makes implant placement easier. Maxillary sinus mucosal membrane perforation is one of the most common intraoperative complications during maxillary sinus grafting and may result in extrusion of graft material into the sinus. When this occurs, the mucociliary function of the maxillary sinus may expel the extruded graft material through its natural ostium, though graft particles may remain in the sinus or possibly occlude the natural ostium. After grafting, transient maxillary sinus mucosal oedema may occur. A postoperative CBCT scan may reveal varying degrees of sinus opacification, namely partial, subtotal or total. Although it is always possible to identify graft material, which may enter the sinus as a result of membrane perforation that might not even be visible to the implantologist during the surgical procedure, it is challenging to assess whether sinus opacification is due to mucosal thickening or mucus accumulation. The aim of the present case series was to offer a pragmatic approach to managing asymptomatic patients whose CBCT scans demonstrated partial, subtotal or total maxillary sinus opacification with bone graft particles that seemed to have been extruded into the sinus.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Seno Maxilar , Elevación del Piso del Seno Maxilar , Humanos , Seno Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen , Elevación del Piso del Seno Maxilar/efectos adversos , Elevación del Piso del Seno Maxilar/métodos , Persona de Mediana Edad , Masculino , Femenino , Mucosa Nasal/diagnóstico por imagen , Mucosa Nasal/patología , Estudios de Seguimiento , Edema/etiología , Edema/diagnóstico por imagen , Edema/patología , Trasplante Óseo/métodos , Trasplante Óseo/efectos adversos , Complicaciones Posoperatorias/diagnóstico por imagen , Complicaciones Posoperatorias/etiología , Anciano , Adulto , Implantación Dental Endoósea/efectos adversos , Implantación Dental Endoósea/métodos
3.
PLoS One ; 19(5): e0304091, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38781146

RESUMEN

OBJECTIVE: To date, it remains a challenge to conduct maxillary sinus floor elevation (MSFE) owing to heterogeneity of anatomical structures and limited operative visibility of the maxillary sinus. The aim of this study is to investigate the safety of MSFE and the accuracy of implant placement using dynamic navigation. METHODS: Forty-two implants were placed in thirty-five patients requiring implantation in posterior maxilla with dynamic navigation. They were assigned to either lateral window sinus floor elevation (LWSFE) group (n = 22) or transcrestal sinus floor elevation (TSFE) group (n = 20) according to the residual alveolar bone height (RBH). Platform deviation, apex deviation and angular deviation between actual and planned implant placement were measured in precision evaluation software. Three deviations of two groups were compared via SPSS 22.0 software. RESULTS: Neither accidental bleeding nor perforation of Schneiderian membrane occurred in any patients. The actual window position of LWSFE was consistent with the preoperative design. There were no significant differences in platform, apex and angular deviations between the two groups (P > 0.05). CONCLUSION: In this study the dynamic navigation harvested clinically acceptable safety of MSFE and accuracy for implant placement in posterior maxillary region. The dynamic navigation would provide the clinician with assistance in achieving precise preoperative planning and reducing complications in surgical procedures. The granular bone grafts used in the LWSFE did not significantly affection on the accuracy of the simultaneous implant placement under the guidance of dynamic navigation.


Asunto(s)
Seno Maxilar , Elevación del Piso del Seno Maxilar , Humanos , Masculino , Femenino , Persona de Mediana Edad , Elevación del Piso del Seno Maxilar/métodos , Seno Maxilar/cirugía , Adulto , Anciano , Implantes Dentales , Implantación Dental Endoósea/métodos , Implantación Dental Endoósea/efectos adversos , Maxilar/cirugía , Cirugía Asistida por Computador/métodos
4.
Medicina (Kaunas) ; 60(5)2024 May 20.
Artículo en Inglés | MEDLINE | ID: mdl-38793021

RESUMEN

For a large benign lesion within the maxillary sinus, such as an antral pseudocyst, maxillary sinus floor augmentation is more commonly performed using a two-stage approach. This involves first removing the lesion, and then, re-entry following several months of healing. In this case series, we described the "one-bony-window" approach, which is a technical surgical modification of the previous one-stage approach, for simultaneous cyst removal and maxillary sinus floor augmentation. Four patients with large maxillary antral pseudocysts were included. The "one-bony-window" approach involves the preparation of a large window opening of approximately 15 mm × 20 mm at the lateral wall. A mesiodistally extended intentional perforation was made in the upper part of the exposed membrane to enhance the access for instrumentation. The antral pseudocyst was removed in its entirety without being deformed to prevent rupture or leakage of the cystic contents. Subsequent detachment and elevation of the Schneiderian membrane at the sinus floor significantly reduced the perforation site, and bone grafting with implant placement was performed simultaneously. This alleviated the need to surgically repair the perforation. The lateral opening was either uncovered or repositioned using bony window lids. Healing abutments were connected after six months, and the final prosthesis was placed after two months. At the 1-year follow-up, the antral pseudocysts had resolved with no specific recurrence, and the stability of the augmented sinus was maintained with excellent implant survival. Within the limitations of our findings, the "one-bony-window" technique can be suggested for the simultaneous removal of large antral pseudocysts and maxillary sinus floor augmentation with favorable clinical outcomes.


Asunto(s)
Quistes , Seno Maxilar , Elevación del Piso del Seno Maxilar , Humanos , Elevación del Piso del Seno Maxilar/métodos , Seno Maxilar/cirugía , Femenino , Masculino , Persona de Mediana Edad , Quistes/cirugía , Adulto , Resultado del Tratamiento , Anciano
5.
World J Surg Oncol ; 22(1): 95, 2024 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-38622695

RESUMEN

BACKGROUND: Maxillary sinus squamous cell carcinoma (MS-SCC) is an infrequent malignancy, and determining the optimal neck management for patients with cT3/4N0 MS-SCC remains a topic of ongoing debate. The purpose of this study was to compare the prognoses and quality of life outcomes of patients who underwent either elective neck dissection (END) or elective neck irradiation (ENI) for cT3/4N0 MS-SCC. METHODS: In this retrospective study, we enrolled patients with surgically treated cT3/4N0 MS-SCC, and the impact of different neck management strategies on regional control and disease-specific survival was compared using propensity score matching. The effect of surgical intervention on quality of life was evaluated using the Mann-Whitney U test. RESULTS: Of the 120 patients included, 36 underwent END. After propensity score matching, our analysis indicated that END did not lead to superior outcomes than ENI, as demonstrated by comparable rates of regional control (p = 0.990) and disease-specific survival (p = 0.999). However, in the 70 returned questionnaires, patients who underwent END reported higher scores in the domains of appearance, chewing, and speech than did patients who underwent ENI. CONCLUSIONS: Our findings suggest that while END and ENI contribute to similar prognoses, END yields superior functional outcomes.


Asunto(s)
Carcinoma de Células Escamosas , Neoplasias de Cabeza y Cuello , Humanos , Disección del Cuello , Seno Maxilar/patología , Carcinoma de Células Escamosas/patología , Estudios Retrospectivos , Puntaje de Propensión , Calidad de Vida , Carcinoma de Células Escamosas de Cabeza y Cuello/patología , Neoplasias de Cabeza y Cuello/patología , Estadificación de Neoplasias
6.
BMJ Case Rep ; 17(4)2024 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-38684353

RESUMEN

Maxillary sinus retention cysts (MRCs) are typically asymptomatic and require no treatment. An early 30s man presented with a decade-long history of severe left-sided chronic facial pain (CFP). Multiple prior treatments resulted in an edentulous patient with persistent pain. Imaging revealed a dome-shaped radiopaque change in the left maxillary sinus. History and clinical examination suggested persistent idiopathic facial pain, and doubts about the outcome of a surgical intervention were explained to the patient. Surgical removal of the MRC via lateral antrotomy led to complete symptom resolution of CFP. This case substantiates the importance of considering MRCs as a possible cause of CFP. It also emphasises the need for a systematic multidisciplinary approach in cases of unexplained CFP.


Asunto(s)
Dolor Facial , Seno Maxilar , Enfermedades de los Senos Paranasales , Humanos , Masculino , Dolor Facial/etiología , Dolor Facial/cirugía , Seno Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen , Adulto , Enfermedades de los Senos Paranasales/cirugía , Enfermedades de los Senos Paranasales/complicaciones , Enfermedades de los Senos Paranasales/diagnóstico por imagen , Mucocele/cirugía , Mucocele/complicaciones , Mucocele/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Quistes/cirugía , Quistes/complicaciones , Quistes/diagnóstico por imagen , Resultado del Tratamiento
7.
In Vivo ; 38(3): 1236-1242, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38688640

RESUMEN

BACKGROUND/AIM: Odontogenic maxillary sinusitis is a clinically popular disease, but radical surgery and endoscopic surgery are often required. In the present study, we compared for the first time the therapeutic efficacy of the extraction of causative teeth with or without irrigation of the extraction fossa. PATIENTS AND METHODS: A total of 60 patients underwent extraction of causative tooth. Among them, 34 patients underwent irrigation, while other 26 patients did not. Based on computed tomography (CT) images, treatment efficacy was quantified by the percentage of the remaining maxillary sinus mucosal lesions. The extent of therapeutic efficacy was evaluated following five grades, based on the percentage of remaining lesions: Grade 1 (0%) (disappearance of lesions), Grade 2 (roughly 10%), Grade 3 (roughly 30%), Grade 4 (approximately 50%) and Grade 5 (100%) (no improvement of the lesions). RESULTS: Irrigation significantly augmented the therapeutic efficacy of tooth extraction for maxillary sinus mucosal lesions (mean grade: decreasing from 3.27 to 1.35). CONCLUSION: The combination of tooth extraction and irrigation may contribute to the reduction of the necessity of surgery for the maxillary sinuses.


Asunto(s)
Sinusitis Maxilar , Irrigación Terapéutica , Extracción Dental , Humanos , Masculino , Femenino , Sinusitis Maxilar/cirugía , Sinusitis Maxilar/terapia , Sinusitis Maxilar/etiología , Persona de Mediana Edad , Adulto , Resultado del Tratamiento , Anciano , Irrigación Terapéutica/métodos , Tomografía Computarizada por Rayos X , Seno Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen
8.
Shanghai Kou Qiang Yi Xue ; 33(1): 64-70, 2024 Feb.
Artículo en Chino | MEDLINE | ID: mdl-38583027

RESUMEN

PURPOSE: To analyze the bone remodeling around the implant 10 years after disk-up sinus reamer(DSR)-based internal sinus floor elevation with implantation and to investigate the influence of different factors on implant retention. METHODS: The clinical and imaging data of patients undergoing DSR-based sinus floor elevation with simultaneous implantation were collected from the Department of Dental Implantology, Affiliated Hospital of Qingdao University from January 2008 to December 2011. Panoramic film and CBCT were used to measure the changes of bone mass around implant in different periods. Kaplan-Meier and Log-rank tests were used to analyze the effects of different factors on implant retention with SPSS 26.0 software package. RESULTS: The study included 98 patients with a total of 128 implants. During the follow-up of 0-168 months, 7 implants failed, and the remaining formed good osseointegration and functioned, with a 10-year cumulative retention rate of 94.53%. The height of bone formation was (0.29±0.15) mm at the top and (2.74±0.66) mm in the sinus of 75 implant sites with complete imaging data obtained ten years after surgery. Kaplan-Meier and Log-rank tests showed that 8 factors including initial bone height, elevated bone height, mucosal perforation, implant length, implant torsion, diabetes, smoking and periodontitis had significant effects on implant retention. CONCLUSIONS: The DSR-based internal sinus floor elevation with implantation is a reliable and stable bone augmentation operation for vertical bone defect in maxillary posterior region, with a 10-year cumulative retention rate of no less than 94%. Initial bone height, elevated bone height, mucosal perforation, implant length, implant torsion, diabetes, smoking and periodontitis are the important factors affecting the long-term retention rate of implants.


Asunto(s)
Implantación Dental Endoósea , Implantes Dentales , Elevación del Piso del Seno Maxilar , Humanos , Implantación Dental Endoósea/métodos , Diabetes Mellitus/cirugía , Maxilar/diagnóstico por imagen , Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Periodontitis , Resultado del Tratamiento
9.
Cancer Radiother ; 28(2): 218-227, 2024 Apr.
Artículo en Francés | MEDLINE | ID: mdl-38599940

RESUMEN

In this article, we propose a consensus delineation of postoperative clinical target volumes for the primary tumour in maxillary sinus and nasal cavity cancers. These guidelines are developed based on radioanatomy and the natural history of those cancers. They require the fusion of the planning CT with preoperative imaging for accurate positioning of the initial GTV and the combined use of the geometric and anatomical concepts for the delineation of clinical target volume for the primary tumour. This article does not discuss the indications of external radiotherapy (nor concurrent systemic treatment) but focuses on target volumes when there is an indication for radiotherapy.


Asunto(s)
Neoplasias de la Boca , Neoplasias de los Senos Paranasales , Humanos , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Seno Maxilar/patología , Cavidad Nasal/diagnóstico por imagen , Planificación de la Radioterapia Asistida por Computador/métodos , Neoplasias de la Boca/patología
10.
BMC Ophthalmol ; 24(1): 146, 2024 Apr 03.
Artículo en Inglés | MEDLINE | ID: mdl-38566099

RESUMEN

BACKGROUND: Trauma-induced orbital blowout fracture (OBF) with eyeball displacement into the maxillary sinus is rare. CASE PRESENTATION: We present the case of a 14-year-old with a closed head injury, OBF, and displacement of the eyeball into the maxillary sinus following a car accident. A prompt transconjunctival access surgery was performed for eyeball repositioning and orbital reconstruction in a single session, mitigating anaesthesia-related risks associated with multiple surgeries. At the 12-month follow-up, his visual acuity was 20/200. Despite limited eye movement and optic nerve atrophy, overall satisfaction with the ocular appearance was achieved. CONCLUSIONS: This report offers novel insights into the mechanisms of OBF occurrence and the development of postoperative complications.


Asunto(s)
Traumatismos Cerrados de la Cabeza , Trastornos de la Motilidad Ocular , Fracturas Orbitales , Masculino , Humanos , Adolescente , Seno Maxilar , Ojo , Fracturas Orbitales/complicaciones , Fracturas Orbitales/diagnóstico , Fracturas Orbitales/cirugía , Traumatismos Cerrados de la Cabeza/complicaciones
11.
J Stomatol Oral Maxillofac Surg ; 125(3S): 101815, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38458547

RESUMEN

OBJECTIVE: To evaluate the impact of molar distalization with clear aligners (CAs) on maxillary sinus parameters and its proximity to the root apices of maxillary molars using Cone Beam Computed Tomography (CBCT). METHODS: The study involved pre- and post-treatment CBCT images of 27 adult patients. MIMICS 21.0 software was used to measure maxillary sinus volume and surface area, while Invivo Dental 6.0 program was used to measure the sinus diameters and proximity of the maxillary molar root apices to the sinus floor. RESULTS: Post-treatment, there was a marked increase in the average volume and surface area of the maxillary sinus on both sides; however, changes in dimensions were not statistically significant. Sinus proximity to the root apices of the maxillary molars showed statistically significant differences, particularly on the left side for all roots. Gender and age impacted the outcomes, with males and younger individuals showing more pronounced changes. No significant differences were observed between the left and right sinuses in all parameters. CONCLUSION: Molar distalization with CAs increases maxillary sinus parameters, more notably in younger and male patients. All molar teeth roots moved toward the sinus, particularly the mesiobuccal root of the maxillary second molar protruded to the sinus.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Imagenología Tridimensional , Seno Maxilar , Diente Molar , Humanos , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/patología , Masculino , Femenino , Adulto , Técnicas de Movimiento Dental/métodos , Técnicas de Movimiento Dental/instrumentación , Adulto Joven , Maxilar/diagnóstico por imagen , Maxilar/patología , Adolescente , Persona de Mediana Edad
12.
Eur Arch Otorhinolaryngol ; 281(5): 2749-2753, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38502360

RESUMEN

INTRODUCTION: Intravascular papillary endothelial hyperplasia (IPEH) predominantly occurs in the subcutaneous and dermal regions and rarely originates from the sinonasal mucosa. CASE PRESENTATION: We report on the case of a 58-year-old male patient who presented with progressive bilateral nasal obstruction, left-sided epiphora, and intermittent epistaxis. Computed tomography revealed a soft tissue opacity in the left maxillary sinus with intersinusoidal nasal wall demineralization, extending into the surrounding ethmoid cells and the right nasal cavity through a contralateral deviation of the nasal septum. Contrast-enhanced T1-weighted magnetic resonance imaging further confirmed these findings. The IPEH originating from the maxillary sinus extended into the contralateral nasal cavity, and it was successfully removed using an endoscopic endonasal approach, avoiding overly aggressive treatment. CONCLUSION: This case report highlights the diagnostic challenges of IPEH in the sinonasal region and the importance of considering IPEH as a differential diagnosis in patients presenting with nasal obstruction, epiphora, and intermittent epistaxis.


Asunto(s)
Enfermedades del Aparato Lagrimal , Obstrucción Nasal , Masculino , Humanos , Persona de Mediana Edad , Cavidad Nasal/diagnóstico por imagen , Cavidad Nasal/patología , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/patología , Epistaxis/etiología , Hiperplasia/patología , Obstrucción Nasal/diagnóstico por imagen , Obstrucción Nasal/etiología , Obstrucción Nasal/cirugía , Enfermedades del Aparato Lagrimal/patología
13.
Artículo en Inglés | MEDLINE | ID: mdl-38443234

RESUMEN

OBJECTIVE: Maxillary sinusitis can be a sequela of medication-related osteonecrosis of the jaw (MRONJ). This study aims to characterize the microbiome of maxillary MRONJ with concurrent maxillary sinusitis and radiographic maxillary sinus opacification to determine if there is a relationship between the microbiome of MRONJ and sinus disease. STUDY DESIGN: This retrospective case series was conducted using electronic health records from the University of Pennsylvania and affiliated hospitals. The target population was surgically managed maxillary MRONJ patients. The primary predictor variables were tissue culture results. The primary outcomes were maxillary sinusitis or maxillary sinus opacification. Statistical analysis was performed using chi-squared tests at the 95% confidence interval. RESULTS: Thirty-nine subjects were selected: 25 had sinus opacification and 11 had sinusitis. Resident bacteria were present in 90% of subjects, nonresident bacteria in 74%, and opportunistic organisms in 15%. There were significantly more subjects with chronic sinusitis microbes (79%) than without. There were significantly more gram-positive anaerobes, specifically Propionibacterium, as well as the gram-negative facultative anaerobe, Capnocytophaga, in subjects with concurrent sinusitis. CONCLUSIONS: Maxillary MRONJ with concurrent maxillary sinusitis may be associated with gram-positive anaerobic species, Propionibacterium, and Capnocytophaga colonization. Maxillary MRONJ patients may benefit from sinus evaluation and concurrent surgical intervention.


Asunto(s)
Sinusitis Maxilar , Enfermedades de los Senos Paranasales , Sinusitis , Humanos , Sinusitis Maxilar/diagnóstico por imagen , Sinusitis Maxilar/microbiología , Seno Maxilar/diagnóstico por imagen , Estudios Retrospectivos , Sinusitis/microbiología
14.
Medicina (Kaunas) ; 60(2)2024 Jan 27.
Artículo en Inglés | MEDLINE | ID: mdl-38399510

RESUMEN

Background and Objectives: Chronic sinusitis is a commonly encountered diagnosis for otorhinolaryngologists. The profound negative effect of rhinosinusitis on patients' quality of life is frequently overlooked, and surgical lines of treatment are numerous. The aim of the study was to assess the comparative efficacy of endoscopic middle meatal antrostomy with the endoscopic prelacrimal recess approach, combined with middle meatal antrostomy in the treatment of unilateral chronic maxillary sinus lesion. Materials and Methods: Thirty patients with unilateral chronic maxillary sinus lesions enrolled in the study at Alahsa hospital. Patients were divided into two groups: 15 treated through a middle meatal antrostomy and 15 treated via a combined middle meatal antrostomy and prelacrimal recess approach. Demographic and clinical information of the patients, including the medical history, CT scan findings, diagnosis, recurrence, and complications, were gathered and analyzed. Pre- and postoperative clinical findings were graded utilizing the Lund-Kennedy Endoscopic Scoring System. Results: The enrolled patients varied in age from 18 to 56, with 60% being male and 40% being female. Antrochoanal polyp, maxillary sinus mucocele, and unilateral allergic fungal sinusitis were among the pathological diagnoses. The follow-up period averaged 14.3 months. Following surgery, two patients in Group II encountered nasal discomfort, which included synechia and epiphora. The success rate for preserving a patient's disease-free condition was 86.7%. A statistically significant difference in disease-free incidence was observed among the patients in group II. In group I, recurrence was identified in 26.7% of the patients. The postoperative symptoms diminished considerably, and the VAS score was reduced substantially. In Group II patients, however, there was no significant difference in scarring. Clinically significant differences were observed in the mean total Lund-Kennedy Endoscopic scores when compared to their preoperative values. Conclusions: Achieving endoscopic access to the sinus's anterior, lateral, inferior, and inferomedial regions is facilitated by operating via the prelacrimal recess, which is the most advantageous approach. This approach facilitates rapid mucosal healing by maintaining the integrity of the nasolacrimal duct and mucosal covering. The specific pathology, surgical objectives, surgeon expertise, and equipment accessibility influence the choice of endoscopic surgical technique.


Asunto(s)
Pólipos Nasales , Sinusitis , Humanos , Masculino , Femenino , Seno Maxilar/cirugía , Seno Maxilar/patología , Calidad de Vida , Pólipos Nasales/patología , Sinusitis/patología , Endoscopía/métodos , Estudios Retrospectivos
15.
Stomatologiia (Mosk) ; 103(1): 31-34, 2024.
Artículo en Ruso | MEDLINE | ID: mdl-38372604

RESUMEN

PURPOSE: Evaluation of the effectiveness of a new method of plasty of an extensive defect in the mucous membrane of the Schneiderian membrane, which occurs during the sinus lift operation, using an artificial collagen membrane and a developed method for fixing it. MATERIAL AND METHODS: A total of 188 patients took part in the study, all of these patients underwent an open sinus lift operation with simultaneous or delayed implantation. Operations were performed under balanced anesthesia. Six months after the operation, according to computed tomography, the height of the formed bone regenerate was estimated. In the area of each missing tooth, the initial bone height and the resulting bone grafting were assessed. Then we compared the average values before and after the operation, the average height difference before and after the operation. RESULTS: In 19 patients during the sinus lift there was an accidental extensive rupture of the mucous membrane of the maxillary sinus. Elimination of the mucosal defect was carried out according to our patented method. All 188 patients were diagnosed with partial loss of teeth with bone tissue deficiency in the distal maxillary sinus. The height of the alveolar process in the projection of missing teeth ranged from 0.5 mm to 5 mm. Delayed dental implantation was performed when the height of the alveolar bone was less than 3 mm, direct when the presence of 3-5 mm. After 6 months, dental implants were installed in the reconstruction zone, after another 6 months - rational prosthetics. CONCLUSIONS: The proposed method of plastic surgery has the following advantages. Firstly, it allows to eliminate the defect of the mucous membrane together with an increase in the height of the alveolar ridge. Secondly, after this method, the integrity of the mucous membrane will be restored. Thirdly, with an alveolar bone height of 3 mm or more, dental implants should also be installed.


Asunto(s)
Aumento de la Cresta Alveolar , Implantes Dentales , Elevación del Piso del Seno Maxilar , Humanos , Implantación Dental Endoósea/métodos , Mucosa Nasal/cirugía , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Aumento de la Cresta Alveolar/métodos , Elevación del Piso del Seno Maxilar/métodos , Maxilar/cirugía
16.
Int J Implant Dent ; 10(1): 9, 2024 Feb 19.
Artículo en Inglés | MEDLINE | ID: mdl-38372934

RESUMEN

PURPOSE: Tricalcium phosphate (TCP) has osteoconductive ability and reportedly offers similar clinical results as autogenous bone grafts in dental implant treatment. However, few reports quantify temporal changes in augmented bone volume after sinus augmentation. We aimed to establish a three-dimensional (3D) quantification method to assess bone volume after sinus augmentation and to evaluate biocompatibility of the TCP plate. METHODS: Maxillary sinus floor augmentation was performed employing the lateral window technique, and plate-shaped ß-TCP (TCP plate) was used instead of granular bone grafting materials. After lifting the sinus membrane, the TCP plate was inserted and supported by dental implants or micro-screws. The changes in bone volumes in the maxillary sinus before and after surgery were recorded using cone-beam computed tomography, saved as Digital Imaging and Communications in Medicine-formatted files, and transformed to Standard Triangle Language (STL)-formatted files. Pre- and post-operative STL data of bone volume were superimposed, and the augmented bone volume was calculated. Moreover, changes in bone volumes, TCP plate resorption rates, and bone heights surrounding the implants were three dimensionally quantified. RESULTS: Fifteen implants in nine subjects were included in this study. TCP plates secured long-term space making, with results similar to those of granular bone substitutes. Newly formed bone was identified around the implant without bone graft material. TCP plate was absorbed and gradually disappeared. CONCLUSIONS: A novel 3D quantification method was established to evaluate changes in bone volume. Clinical application of TCP plate in sinus augmentation could be a better procedure in terms of prognosis and safety.


Asunto(s)
Sustitutos de Huesos , Fosfatos de Calcio , Elevación del Piso del Seno Maxilar , Humanos , Sustitutos de Huesos/uso terapéutico , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Placas Óseas
17.
J Oral Implantol ; 50(2): 95-102, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-38353317

RESUMEN

The aim of this study was to evaluate the radiographic and clinical outcomes of patients undergoing sinus membrane elevation via a minimally invasive crestal approach utilizing the dental implant. Twenty patients having 1 or more missing posterior teeth were included. The maxillary sinus membrane was elevated using dental implant via a crestal approach in areas with insufficient residual bone. CBCT scans were used to measure the amount of newly formed bone, implant length inside the sinus, bucco-palatal sinus width, and bone thickness. Surgical and postsurgical complications along with implant survival were also measured. The mean (±SD) values for the newly formed bone after 1 year were 2.4 (±1.87) mm, while values for implant length inside the sinus were 4 (±1.49) mm. The results showed that percentage of implant length inside the sinus and the palatal bone thickness were statistically significant positive predictors of the newly formed bone. Higher percentage of implant length inside the sinus and increased palatal bone thickness were associated with larger amounts of newly formed bone. A high patient satisfaction was reported along with a 100% implant survival. The utilization of the novel dental implant approach for crestal sinus elevation demonstrated predictable clinical and radiographic outcomes. This novel technique is simple to both patients and clinicians, rendering it a promising and cost-efficient procedure.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Implantación Dental Endoósea , Implantes Dentales , Elevación del Piso del Seno Maxilar , Humanos , Elevación del Piso del Seno Maxilar/métodos , Femenino , Masculino , Persona de Mediana Edad , Implantación Dental Endoósea/métodos , Adulto , Seno Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen , Resultado del Tratamiento , Satisfacción del Paciente , Anciano , Procedimientos Quirúrgicos Mínimamente Invasivos , Complicaciones Posoperatorias
18.
J Clin Periodontol ; 51(6): 754-765, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38379293

RESUMEN

AIM: To discover the populations of mesenchymal stem cells (MSCs) derived from different layers of human maxillary sinus membrane (hMSM) and evaluate their osteogenic capability. MATERIALS AND METHODS: hMSM was isolated into a monolayer using the combined method of physical separation and enzymatic digestion. The localization of MSCs in hMSM was performed by immunohistological staining and other techniques. Lamina propria layer-derived MSCs (LMSCs) and periosteum layer-derived MSCs (PMSCs) from hMSM were expanded using the explant cell culture method and identified by multilineage differentiation assays, colony formation assay, flow cytometry and so on. The biological characteristics of LMSCs and PMSCs were compared using RNA sequencing, reverse transcription and quantitative polymerase chain reaction, immunofluorescence staining, transwell assay, western blotting and so forth. RESULTS: LMSCs and PMSCs from hMSMs were both CD73-, CD90- and CD105-positive, and CD34-, CD45- and HLA-DR-negative. LMSCs and PMSCs were identified as CD171+/CD90+ and CD171-/CD90+, respectively. LMSCs displayed stronger proliferation capability than PMSCs, and PMSCs presented stronger osteogenic differentiation capability than LMSCs. Moreover, PMSCs could recruit and promote osteogenic differentiation of LMSCs. CONCLUSIONS: This study identified and isolated two different types of MSCs from hMSMs. Both MSCs served as good potential candidates for bone regeneration.


Asunto(s)
Diferenciación Celular , Seno Maxilar , Células Madre Mesenquimatosas , Osteogénesis , Humanos , Células Madre Mesenquimatosas/citología , Osteogénesis/fisiología , Seno Maxilar/citología , Citometría de Flujo , Proliferación Celular , Células Cultivadas , Separación Celular/métodos , Masculino , Adulto , Femenino , Periostio/citología
19.
BMC Oral Health ; 24(1): 227, 2024 Feb 13.
Artículo en Inglés | MEDLINE | ID: mdl-38350895

RESUMEN

PURPOSE: This study aimed to introduce a graftless sinus lifting approach with simultaneous dental implant placement in the alveolus of the posterior maxilla and compare this approach's outcomes in freshly extracted sockets versus healed sockets. MATERIALS AND METHODS: A prospective study was conducted on 60 patients aged between 27 and 59 years old, requiring dental implants in the posterior maxilla, and diagnosed with reduced vertical bone height (30 with freshly extracted sockets (group A) and the remaining 30 with healed sockets (group B). Before the sinus lifting approach, a cone beam computed tomography (CBCT) was taken, followed by another CBCT at least one-year post-sinus lifting (range: 12-36 months). Biological and mechanical complications were assessed, and the primary implant stability was measured using the Implant Stability Quotient (ISQ). Parametric data were analyzed using an independent t-test for intergroup comparisons, with significance set at P < 0.05. RESULTS: No significant differences were found among groups concerning gender, placement side, and follow-up. All dental implants demonstrated high survival rates with no observed biological or mechanical complications. Moreover, the primary implant stability was satisfactory, and there was no statistically significant difference (P = 0.38). In terms of new intrasinus bone formation, both groups exhibited satisfactory and successful outcomes, with increased new bone formation in group A. However, there was no statistically significant difference (P = 0.26). Regarding the vertical sinus floor elevation without new bone formation, group B showed (0.11 ± 0.64) mm of intrasinus implant height without bone formation, while group A showed an increment of bone formation above the intrasinus implant (0.22 ± 0.33) mm, with no statistically significant difference between both groups (P = 0.30). CONCLUSION: Our approach proves to be predictable, low-cost, and efficient option for sinus lift procedures, demonstrating high survival rates with acceptable primary implant stability. Moreover, it yields satisfactory outcomes in terms of new intrasinus bone formation, both in freshly extracted and healed sockets. Consequently, our approach holds promise as a reliable procedure for sinus lifting with simultaneous dental implant placement.


Asunto(s)
Implantes Dentales , Elevación del Piso del Seno Maxilar , Humanos , Adulto , Persona de Mediana Edad , Implantación Dental Endoósea/métodos , Estudios Prospectivos , Elevación del Piso del Seno Maxilar/métodos , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Maxilar/cirugía , Resultado del Tratamiento
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