Application of socket-shield technique for immediate implant placement and provisionalization in esthetic zone: a case report and literature review / 口腔疾病防治

Objective@#To investigate the effect of the socket-shield technique (SST) concurrent with immediate implant placement and provisionalization (IIPP) in the aesthetic restoration of anterior teeth.@*Methods@#A case of maxillary anterior tooth stumps with a thin labial bone wall was treated with SST for preservation of labial soft and hard tissue fullness, combined with an immediate implant placement and immediate provisional crown for restoring the shape of the tooth and gingival molding@*Results@#Immediate implant placement and provisionalization restored the morphology and function of the affected tooth in the shortest possible time. The patient's labial soft and hard tissue contours in the affected tooth area were well preserved in the 18-month follow-up after the application of the SST, which presented a better aesthetic result. The literature review indicates that the indications for SST are unrestorable maxillary anterior teeth, whose dental, periodontal and periapical tissues are healthy and intact. In the esthetic zone, root shielding is effective in maintaining the soft and hard tissue contour on the labial side of the implant. However, there is no consensus on the technical details of SST, such as the ideal coronal height and thickness of the shield, and the management of the gap between the shield and the implant. Thus, more clinical studies and histologic evidence are needed to provide a reference for clinical decision-making. In addition, digital technology can improve the accuracy of implant placement and shield preparation.@*Conclusion@#The correct application of SST combined with IIPP in the esthetic zone can ensure esthetic results. However, more high-quality evidence-based medical evidence is needed for its long-term efficacy, and indications should be strictly controlled during clinical application.

Application of soft tissue augmentation in labial contour aesthetics of anterior dental implants / 口腔疾病防治

@#After tooth extraction, labial contour collapses due to inevitable physiologic bone remodeling. To achieve optimal outcomes for pink esthetic treatment at anterior implant sites, bone or soft tissue augmentation has been advocated to maintain or reconstruct the labial tissue contour. When choosing soft tissue augmentation for esthetic restoration, it is necessary to strictly grasp the indications for surgery. Soft tissue augmentation to maintain or reconstruct the labial tissue contour could be considered in patients with healthy soft tissue and no bone defects or only mild horizontal bone defects. In immediate, early and late implant placement, the timing of soft tissue augmentation may vary. In immediate implantation, the labial bone plate is intact, so it is highly recommended to simultaneously manage soft tissue during implant placement. However, patients may have large bone defects with early or late implant placement. The risk of augmenting bone and soft tissue simultaneously is likely too high, and bone augmentation surgery is often performed at the first stage while soft tissue augmentation surgery is performed at the second stage. Therefore, soft tissue surgery is often carried out simultaneously with abutment connection. Currently, soft tissue augmentation is achieved mostly with adjacent autologous soft tissue grafts, such as free gingival grafts, subepithelial connective tissue grafts or pedicle palatal flaps, which are often accompanied by a second surgical area. The replacement of autogenous soft tissue grafting with new biological materials will become an inevitable trend. In this article, we analyze and summarize the indications, timing and different methods of soft tissue augmentation to maintain and reconstruct the labial contour.

Preservación alveolar post extracción en zona estética: decisiones clinicas predecibles en sitio severamente afectado / Alveolar ridge preservation in the esthesic zone: predictable decisions in a severly affected site

INTRODUCCIÓN: La valoración particular de sitios severamente comprometidos, involucra considerar los tiempos necesarios de cicatrización, así como evidencia actual en términos de biomateriales y técnicas quirúrgicas con el fin de lograr un tratamiento exitoso. MATERIAL Y MÉTODO: Paciente sexo femenino, 28 años, asiste por dolor e infección en diente 2.1 al Postítulo de Periodoncia UDD. Se observa defecto extenso y lesión que compromete tanto las tablas óseas vestibular como palatina. El tratamiento consistió en: exodoncia y regeneración ósea, instalación del implante 6 meses después de la exodoncia y cirugía de conexión 7 meses después más injerto de tejidos blandos. RESULTADOS: El tratamiento de defectos combinados (tejidos duros y blandos), asociados a procesos infecciosos de larga data, mediante rehabilitación implanto soportada puede ser muy predecible y exitoso en la medida que se respeten los tiempos de regeneración de diferentes estructuras.

INTRODUCTION: The specific assessment of a severely compromised sites involves: the consideration of healing time according to the different kinds of tissues involved and the knowledge of the evidence available concerning biomaterials and surgical techniques. MATERIAL AND METHODS: Female patient attends the postgraduate school of periodontics, UDD University in Santiago de Chile, because of pain and chronic infection compromising tooth 2.1. At clinical evaluation, the site has an extensive defect, with active fistula that compromises the buccal and palatal bone plates. The treatment consisted of exodontia and guided bone regeneration, implantation six months after initial exodontia and abutment connection surgery seven months after implant insertion. RESULTS: the treatment of combined defects associated with a long-standing infectious process can be very predictable and successful, only if the measures of time and tissue handling are considered and applied.

Clinical application and new progress of dynamic navigation system in the field of oral implantology / 口腔疾病防治

@#Currently, computer-aided implant surgeries include implant placement surgery under the guidance of a dynamic navigation system. With the use of software inherent in the navigation system, doctors can make a preoperative plan including the ideal position of the implant. Then the plan can be accurately transferred to the surgery, during which the real-time condition of the drill and its relationship with the surgical region will be visualized by the surgeon and the drill can be adjusted in a timely manner. Currently the dynamic navigation system is increasingly widely utilized, especially in cases of esthetic zones or surgical sites with important anatomical structures. However, the clinical workflow of the navigation system is complicated, including CBCT taken after the registration device placement, prosthetic-driven 3D design, calibration, registration, navigated borehole preparation and implant placement surgery. Many details should be considered when the device is applied, including implant position design, fixation of the tracking device, registration, and stable borehole preparation under the guidance of dynamic navigation. Therefore, this article introduces the dynamic navigation system into the clinical workflow and evaluates, the effects of the application and the clinical features. The new progress of the navigation system in the field of implantology is demonstrated at the same time, including navigated surgery in fully edentulous arches and in the zygomatic zone. Further improvements in the navigation system in terms of the accuracy and simplification of the workflow are needed in the future.

Comparison of clinical effects of a modified socket shield technique and the conventional immediate implant placement / 华西口腔医学杂志

OBJECTIVE@#To compare the clinical effects of a modified socket shield technique (SST) and the conventional immediate implant placement in the esthetic zone.@*METHODS@#Twenty-four patients with one hopeless upper incisor were consecutively enrolled in this study. All patients were scheduled for immediate implant placement. Twelve patients underwent a modified SST (experimental group) whereas the others underwent conventional procedures (control group). Radiographic and clinical data were obtained preoperatively, immediately after surgery, and 12 months after surgery. The success rate of the implants, the pink esthetic score (PES) and patient satisfaction were analyzed. Statistical analysis was conducted using SPSS 21.0 software.@*RESULTS@#One year after operation, the success rate of the implants was 100% in both groups. The PES and patient satisfaction of the experimental group were significantly higher than those of the control group (P<0.05). The buccal bone plate resorbed less in the experimental group than in the control group (P<0.05).@*CONCLUSIONS@#The modified SST is advantageous over the conventional immediate implant placement in terms of buccal bone and soft tissue maintenance.

A study of the esthetic outcomes of peri-implant soft tissue conditioning with provisional restorations and healing abutments / 口腔疾病防治

Implant restoration ; Provisional restoration ; Healing abutment ; Esthetic zone ; Esthetic outcomes@#To compare the esthetic outcomes of peri-implant soft tissue conditioning with provisional restorations and healing abutments.@*Methods @#A total of 48 patients missing a single tooth in the esthetic zone were chosen for the present study and divided into two groups. Twenty-six patients in Group A used provisional restorations to condition the peri-implant soft tissue before final restorations, while 22 patients in Group B used healing abutments to condition the soft tissue. All patients were evaluated by pink esthetic scores (PESs) at the time of the final restoration and at a 1-year follow-up. @*Results@#A total of 26 implants in Group A and 22 implants in Group B showed good peri-implant soft tissue condition. PESs at the time of the final restoration and at the 1-year follow-up in Group A were 8.18 and 8.35, respectively, and 6.73 and 8.18 in Group B, respectively. PESs at the time of final restoration and at the 1-year follow-up were not significantly different in Group A but were significantly different in Group B. The PESs of the two groups were significantly different at the final restoration but were not significantly different at the 1-year follow-up. @*Conclusions @#Provisional restoration in the esthetic zone can improve the pink esthetic effect when permanent restoration.

The immediate implant and immediate restoration in the anterior maxilla with the digital technique: case report and literature review / 口腔疾病防治

Objective @#To describe a novel workflow for the anterior dental esthetics in immediate implant and immediate aesthetic restoration with digital technique. @*Methods @#Before the implant placement, a intra-oral optical scan(IOS) combined with CBCT was performed to virtually design the 3D implant position and restoration. A surgical guide and an individualized Ti abutment restoration was CAD/CAM-fabricated out of the PMMA-based in a fully digital workflow and seated at the stage of minimal invasive surgery.@*Results @#The technique achieved immediate implant and immediate restoration after tooth extraction. Immediate restoration of temporary crown could be completed immediately in second patient visit after the operation, finally realized the aesthetic implantation with preserved soft tissue contour. @*Conclusin @# The fully digital technique changed the conventional workflow which achieves more efficiency and better aesthetic effect.

Combination of periodontal, orthodontic and endodontic therapy in upper anterior teeth with hopeless prognosis and long-time follow-up:a case report / 北京大学学报(医学版)

It is complicated to decide the treatment plan of hopeless anterior teeth in esthetic zone due to severe periodontitis, periodontal-endodontic combined lesion or teeth trauma.The optional treatment plan for this kind of teeth includes retention after periodontal treatment, extraction and implant treatment, extraction and prosthodontic treatment and so on.To make an appropriate treatment plan, patients'' periodontal conditions, periodontal biotype, local anatomy, esthetic demand, economic condition and social psychological status should be comprehensively considered.A combine of periodontal, endodontic and orthodontic therapy may achieve a good treatment effect in hopeless anterior teeth with severe periodontal destruction, tooth extrusion and occlusal trauma.In this case, a 20-year-old female who presented with symptoms of bleeding on brushing and upper incisors loosening for 1 month came to the Department of Periodontology, Peking University School and Hospital of Stomatology.The clinical examinations revealed that the patient''s right upper incisor had signs of mobility (Ⅲ°), intrusion of 1-2 mm, and probing depth (PD) of 9-10 mm.The periapical radiograph showed that the alveolar bone of right upper incisor absorbed horizontally to the apex.And the patients showed Angle Ⅱ° malocclusion with Ⅱ° overbite in anterior teeth and maxillary protrusion.A diagnosis of aggressive periodontitis and Angle Ⅱ° malocclusion was made.The treatment of this patient lasts for 5 years which include periodontal initial therapy, orthodontic therapy, guided tissue regeneration (GTR) of right upper incisor and supportive periodontal therapy and the clinical result is fine.A hopeless upper incisor was successfully retained and the longtime clinical condition was stable.The strategy of retention of hopeless upper anterior teeth, the relationship of periodontal treatment and orthodontic treatment, and the indications of periodontal and orthodontic combined therapy were also discussed on the basis of this case.Generally, the positive factors in retention of hopeless teeth includes young age, absence of systemic conditions, strong motivation for maintaining the tooth, single root anatomy, integrated dentition, good response to cause-related therapy, intrabony alveolar bone defect, thick periodontal biotype, and regular supportive periodontal therapy.And in the progress of orthodontic therapy, regular supportive periodontal therapy and good plaque control is extremely important.

Dispositivo acrílico simples para medir as alterações nos tecidos moles da maxila após procedimentos implantares ou restauradores protético-periodontais / A simple acrylic device to measure maxillary soft tissue alterations after implant and/or restorative periodontal and prosthetic procedures

Alterações nos tecidos moles, na zona estética, podem ocorrer por procedimentos restauradores associados ou não à Implantodontia. Os autores propuseram um dispositivo acrílico simples associado a uma sonda periodontal, para verificação destes níveis em todos os momentos do tratamento reabilitador. O dispositivo em questão também pode ser desenhado e confeccionado em qualquer sistema CAD/CAM.

Soft tissue changes in the esthetic zone can occur after restorative procedures associated or not to implant dentistry. The authors describe a simple acrylic device associated to a periodontal probe to verify those levels during all treatment procedure steps. Also, this device can be design and milled at any CAD/CAM system.

The influence of angulation of maxillary anterior teeth on treatment design of dental implants / 华西口腔医学杂志

<p><b>OBJECTIVE</b>This study aims to analyze the angulation of the maxillary anterior teeth relative to the alveolus to provide reference data for clinicians on the best conditions for implant placement in the esthetic zone.</p><p><b>METHODS</b>Numerous cone beam computed tomography (CBCT) images were reviewed and screened. A total of 150 maxillary images were selected by strict adherence to the defined inclusive criteria, with 75 images each from male and female patients (between the ages of 19 and 48 years at the time of CBCT scan). The maxillary anterior teeth were gathered into the following three groups for males and females: upper canines, upper lateral incisors, and upper central incisors. Then, the long axis of each qualified tooth and its corresponding alveolar process were drawn, and the angles formed by these structures were measured. The resultant data were analyzed by SPSS 19.0.</p><p><b>RESULTS</b>The long axis of the maxillary anterior teeth all inclined to the palatal side of the alveolar process. The internal angle (α) formed by the long axis of the maxillary central incisors and the long axis of the alveolar bone presented a mean value of 16.22° (range: 2.50°-28.80°) for male subjects and 15.20° (range: 2.20°-27.20°) for female subjects. The internal angle (α) of the maxillary lateral incisors exhibited a mean value of 17.50° (range: 3.80°-29.50°) for male subjects and 15.99° (range: 4.10°-33.30°) for female subjects. Finally, the internal angle (α) of the maxillary canines presented a mean value of 16.27° (range: 1.00°-31.50°) for male subjects and 15.01° (range: 3.50°-27.40°) for female subjects.</p><p><b>CONCLUSIONS</b>The long axis of the maxillary anterior teeth all inclined to the palatal side of the alveolar process. For implant placement, careful preoperative analysis and evaluation with CBCT may be beneficial for avoiding the risk factors and achieving
a high probability of success in the esthetic region.</p>

Effects of flapless versus flap implant surgery on tissues surrounding implants in esthetic zone / 中华医学美学美容杂志

Objective To evaluate the effects of flapless versus flap implant surgery on the tissues surrounding the implants in the esthetic zone.Methods A controlled study was conducted in 20 patients with a single implant in the anterior esthetic zone,as compared with the flapless and traditional flap implant placement.6 and 12 months after the implant ation,the vertical reduction of labial and lingual bone were assessed by cone beam computed tomography (CBCT);6 and 12 months after the crowns restoration,the peri-implant soft tissues were examined by probing depth (PD),modification sulcus bleeding index (mSBI),papillary index (PPI) and evaluated by pink esthetic score (PES) standard.Results The vertical reduction of the flapless labial and lingual bone was lower than that of the flap,in which the change of labial bone was statistical differences at 6 months after implant surgery between groups (P ＜ 0.05).The differences of PES between two groups were not statistically significant,although PES increased over time in both groups,which the flapless group had a significantly change in PES from crown placement to 12 months (P＜0.05).Conclusions A flapless implant surgery in sufficient bone support may provide a better short-term esthetic result,whereas the longterm effects need further studies.

Regeneração óssea guiada com carga imediata em zona estética: relato de caso clínico / Guided bone regeneration with immediate loading in esthetic site: a clinical case report

Os substitutos ósseos aloplásticos têm sido amplamente utilizados com o intuito de obterem da excelência nas reabilitações de zonas estéticas. O papel desses biomateriais é restituir a parede óssea vestibular e, assim, conferir a saúde e funcionalidade dos tecidos peri-implantares. A decisão do profissional pelo procedimento de colocação do implante imediato após a extração do dente é uma realidade, especialmente pela otimização do tempo, diminuição de intervenções cirúrgicas e preservação dos tecidos peri-implantares. O presente artigo relata o caso de uma paciente do sexo feminino, 36 anos de idade nele foi realizada a remoção do incisivo lateral superior do lado direito comprometido endodonticamente e instalado imediatamente um implante associado à regeneração óssea, guiada com osso bovino e membrana de barreira nos sítios com defeitos ósseos na região de colocação do implante, a qual se tratava de uma área com alta exigência estética. Após 12 meses de acompanhamento, a paciente apresenta excelente resultado estético e funcional... (AU)

The alloplastic bone substitutes have been largely used with the aim of achieving excellence in the restoration of esthetic areas. The role of these biomaterials is to restore the buccal bone wall, and thus give the health and functionality of the peri-implant tissues. The professional's decision by the procedure of implant placement immediately after the tooth extraction is a reality, especially by the optimization of time, decreased surgical interventions and preservation of peri-implant tissues. This article reports a case of a female patient, 36 years old, in which the removal of the endodontically compromised right side upper lateral incisor was performed, and an implant was immediately installed, associated with guided bone regeneration using bovine bone and membrane barrier in sites with bone defects in the area of the implant placement, which was a site with high esthetic requirement. After 12 months of follow up the patient presents excellent functional and esthetic result... (AU)

Preservação da arquitetura gengival em região estética por meio de compensações nas seguintes situações: alvéolo cicatrizado, alvéolo fresco íntegro e alvéolo fresco comprometido / Preservation of gingival architecture in the esthetic zone: healed, fresh intact, and fresh compromised alveolar socket modalities

O objetivo desse artigo foi demonstrar metodologias de preservação da arquitetura gengival em região estética por meio de diferentes tipos de compensações, nas situações de alvéolo cicatrizado, alvéolo fresco íntegro e alvéolo fresco comprometido. As opções de compensações utilizadas em cada caso se mostraram eficientes, de fácil reprodutibilidade e permitiram a manutenção e preservação das características gengivais.

The aim of this article was to demonstrate methods to preserve the gingival architecture in three different alveolar socket situations: healed, fresh intact, and fresh compromised. All options were effective, easy to reproduce, and allow for maintenance of gingival characteristics.

Exodontia e instalação imediata de implante na região estética com enxerto de bloco xenogênico colagênico – acompanhamento clínico e tomográfico de dez meses / Tooth extraction and immediate implant placement in the esthetic region with collagen xenogeneic bone block – a clinical and CBCT 10-month follow-up

Este artigo descreveu a filosofia de tratamento para a reposição de um incisivo central com implante em carga imediata em alvéolo pós-extração, com preenchimento do gap vestibular através do enxerto xenógeno Geistlich Bio-Oss Collagen. O bom planejamento sobre o posicionamento palatino do implante, preservação alveolar, preenchimento do gap com um biomaterial de baixa taxa de reabsorção, desenho adequado do implante e o manejo da coroa provisória sobre o implante torna possível a obtenção de resultados satisfatórios, controlados clinicamente e tomograficamente durante dez meses, onde foi possível observar a manutenção do material de enxertia e, portanto, a arquitetura gengival...

This article describes the treatment philosophy for replacement of an upper central incisor with immediate implant loading in a fresh-extraction socket, being the gap filled with Bio-Oss Collagen. Implant palatal positioning, alveolar preservation, a low resorption biomaterial for gap filling, adequate implant design, and the management of provisional crown led to satisfactory results after 10 months of clinical and CBCT controls, with the maintenance of graft and gingival architecture...

An assessment of labial bone mass after immediate implant or delayed implant placement in esthetic zone / 中华医学美学美容杂志

Objective To evaluate the alteration of labial bone mass one year after immediate implant or delayed implant placement in esthetic zone.Methods From June 2009 to June 2012,22 patients with 11 immediate implant and 11 delayed implant in the maxillary anterior region were followed up.CBCT images were obtained immediately after surgery and one year after implant placement,the horizontal and vertical alterations of the labial bone were evaluated by image analysis software.Results The 1-year vertical reduction of labial bone after immediate implant placement was statistically significant (P＜0.05),and no significant difference in delayed implant (P＞0.05).The 1-year horizontal reduction of labial bone was statistically significant at coronal and middle of implant,without significant difference at apical of implant.Conclusions Immediate implant can not stop the physical absorption of labial alveolar ridge,and the study can provide reference to achieve esthetics in the anterior region.

Utilização de enxerto xenógeno em bloco, previamente à instalação de implantes contíguos, com carregamento imediato e precoce na área estética / Use of bovine block graft before placement of adjacent dental implants under immediate and early loading in the esthetic zone

Apesar do avanço no conhecimento científico biológico e com melhores instrumentos para o planejamento, a perda de dois elementos dentários contíguos na região maxilar anterior continua sendo um grande desafio estético quando utilizamos a terapia com implantes osseointegrados. Este artigo apresenta um caso clínico no qual uma paciente de 25 anos teve dois incisivos centrais perdidos, por reabsorção interna e externa após trauma e tratamento endodôntico, substituídos por implantes dentários. Enquanto no sítio do elemento 21 foi possível instalar um implante imediatamente após a extração, com provisório imediato, no sítio do elemento 11 foi necessária a execução de regeneração tecidual guiada. Um bloco de material xenógeno bovino desproteinizado (Bio-Oss Block) foi utilizado em conjunto com uma membrana de colágeno natural suíno (Bio-Gide) para este fim. Após seis meses, um implante foi instalado no sítio 21. Após a moldagem e escaneamento, dois pilares de zircônia e duas coroas de cerâmica com base de zircônia foram fabricados, instalados e cimentados de maneira precoce, 12 dias após a segunda implantação. O controle após seis meses demonstra boa estabilidade dos tecidos.

Although advances on treatment planning tools and biological knowledge have been made, the loss of two adjacent teeth in the anterior maxilla continues to be a great esthetic challenge when dental implants are to be inserted. This case report presents a 25 years-old patient where the two central incisors had to be removed due to internal and external root resorption after trauma and endodontic therapy. While in the region of tooth 21 it was possible to insert a dental implant soon after tooth removal, a guided tissue regeneration procedure was necessary at the region of 11. Thus, a deproteinized bovine xenogeneic bone block (Bio-Oss Block) was grafted along with a natural collagen porcine membrane (BioGide). After six months, a dental implant was placed in the same region. After impression and scanning, two zirconia abutments and zirconia-based defi nitive ceramic crowns were fabricated and cemented 12 days after the second implant surgery. The six-moth postoperative results demonstrate good tissue stability.

Restoring esthetics by immediately loaded implant placement.

The replacement of a single missing anterior tooth with an implant-supported crown is a demanding therapy. This report describes a treatment in which an anterior maxillary implant was immediately restored with a provisional restoration. During the provisional phase, an optimal emergence profile was created by adjusting the provisional restoration. An impression was made with an individually fabricated impression post for an accurate reproduction of the established emergence profile and, finally, a screw-retained all-ceramic crown was placed. By implementing this protocol, an optimal definitive result could be achieved, together with immediate patient satisfaction.

Alternativa protética para correção de implante mal posicionado em região estética / Prosthetic alternative for mal-positioned dental implants in the esthetic zone: a case report

Este relato de caso demonstra o uso de pilares cerâmicos para correção do implante dentário mal posicionado. Uma paciente do sexo feminino, 22 anos de idade, apresentou-se com uma prótese parcial removível e foi diagnosticada com linha do sorriso alta e um implante dentário na região 11. Um componente de transferência personalizado reproduzindo o perfil de emergência da coroa provisória foi usado, e um pilar Procera foi fabricado para receber uma coroa total em cerâmica, fixada com cimento resinoso de presa dual. O resultado estético final foi satisfatório, dada a angulação inicial do implante.

This case report shows the use of a ceramic abutment to correct a malpositioned dental implant. A female, 22 years-old patient wearing a partial removable prosthesis was diagnosed with a high lip line and a dental implant at the region of 11. A customized transfer component reproducing the provisional crown´s emergence profile was used and a Procera abutment fabricated to receive an all-ceramic crown cemented with a dual-cure resin luting agent. The final esthetic outcome was satisfactory regarding the initial implant angulation.