Orthodontic movement of a horizontally fractured tooth: a case report

Abstract –  Intra-alveolar root fractures are relatively uncommon, and sometimes may be healed without treatment. Diagnosis of intra-alveolar root fracture is frequently made by exclusion of clinical signs of other traumatic injury, and by radiographic examination with films taken at different tube angulations. This case report presents a horizontal root fractured tooth that was healed satisfactory without treatment and moved orthodontically after prolonged time from trauma.     

Orthodontic movement in traumatically intruded teeth: a case report

Abstract  – Intrusive luxation of permanent mature teeth is one of the most serious injuries to the periodontal ligament in dental traumatology. Various treatment approaches are currently practised. The treatment of choice for traumatically intruded teeth was to combine orthodontic repositioning and endodontic treatment. This case report describes the treatment of a 50-year-old male patient, with four completely intruded mature permanent maxillary incisors. Orthodontic extrusion was initiated 1 week after the trauma. After 10 days, the crowns of the teeth were exposed to start endodontic therapy. Nine weeks after the injury and 8 weeks after the beginning of orthodontic extrusion, the intruded incisors were back about to their original position before the displacement occurred. All treatment management as well as a follow-up 8 years after the trauma are described.     

Orthodontic movement of two root fractured teeth: a case report

AIM: To illustrate significant tipping orthodontic movement of root fractured teeth. SUMMARY: As the frequency of root fractured maxillary teeth is related to increased overjet and reduced lip coverage, orthodontic treatment may increase lip coverage and reduce the risk of trauma or its severity. It may also be necessary to move previously traumatized teeth. Two root fractured teeth were tipped through a considerable angle (19 degrees ) to reduce a large overjet and followed up for 5 years. KEY LEARNING POINTS: -- Reduction of large overjets involving root fractured teeth may not affect pulp vitality. -- Root fragment separation prior to orthodontics did not appear to increase in this patient, but angulation of the fragments did not completely follow the major change to the coronal part of the tooth.     

骨引导再生技术在牙槽骨骨量不足牙种植术中的应用

目的:评价骨引导再生技术在牙槽骨骨量不足患者牙种植术的应用效果.方法:对23例31颗牙槽骨骨量不足患者,种植体周围骨缺损处用人工骨粉植入及胶原生物膜覆盖.随访6-12个月,通过临床检查及x线曲面断层片,观察其临床效果.结果:随访6-12个月,种植牙形态及功能良好,x线检查未见明显骨吸收.种植牙100％成功.结论:对牙槽骨骨量不足患者,同期行GBR和种植体植入术后,可以重建缺损的骨组织,临床效果满意.     

Cast-based guided implant placement: a novel technique

One of the most challenging aspects of implant placement is the correct spatial positioning of the dental implant in the bone. Surgical guides of various configurations have been proposed to aid implant placement. If a fully limiting surgical guide is used, the encoded information should be reliable, as deviations are not possible during surgery. This article describes a combination of analog techniques, including bone sounding and periapical radiographs used to study the available bone volume. A simplified casting protocol is proposed, and the implant platform position of the implant analog is transferred to a surgical guide composed of a stiff vinyl polysiloxane material. This surgical guide is used in a conventional flapless guided implant surgery protocol. This combination of techniques allows precise placement of a dental implant, abutment, and provisional restoration in a minimally invasive manner.     

生长因子联合引导性再生技术在口腔种植治疗中的应用

随着膜屏障和骨移植材料的发展,引导性再生技术已广泛应用于口腔种植修复及外科重建领域.将生长因子复合到生物活性材料上,利用其促进骨再生的特性而进一步提高骨诱导活性并增强骨性整合已成为目前研究的热点.     

A randomized, controlled clinical trial to evaluate a new membrane for guided bone regeneration around dental implants

Objectives: The use of barrier membranes in guided bone regeneration (GBR) procedures for the treatment of alveolar bone defects is common practice. The objective of this study was to test whether a synthetic bioresorbable polyethylene glycol (PEG) hydrogel membrane could result in a similar amount of vertical bone fill as a standard collagen membrane, both combined with a membrane supporting material.
Material and methods: The study enrolled 37 patients requiring implant treatment with an expected osseous defect in the posterior maxilla or mandible. After raising a mucoperiosteal flap, the implant sites were prepared and dental implants placed. The defect height was then measured and defects <3 mm were excluded from the study. Defects were grafted with bovine bone mineral and randomly covered with either a collagen membrane (control group, 18 patients) or a PEG hydrogel membrane (test group, 19 patients), which is applied as a liquid. After a healing period of 6 months, surgical re-entry was performed and the change in vertical bone height from baseline evaluated.
Results: Well-vascularized hard tissue was apparent at all sites and the regenerated bone was similar to the surrounding native bone. Mean vertical defect fill after 6 months was 5.63±1.84 mm at test sites and 4.25±1.16 mm at control sites, and the mean defect fills were 94.9% and 96.4% at test and control sites, respectively. More soft tissue complications were observed with the PEG membrane (e.g., delayed or incomplete wound healing) but all sites recovered uneventfully.
Conclusions: The new PEG hydrogel membrane was as successful as a standard collagen membrane in the treatment of bony dehiscence defects around dental implants with simplified clinical handling.     

Fabricating a chairside CAD-CAM radiographic and surgical guide for dental implants: A dental technique

The conventional method of diagnosing and treatment planning an implant-supported restoration involves making a diagnostic alginate impression and fabricating a radiographic and surgical guide. The procedure described uses an intraoral scanner and milling unit to fabricate a chairside computer-aided design and computer-aided manufacturing radiographic and surgical guide for use with a cone beam computed tomography system.