Maxillary Anterior Segment Research Articles

Stability of the anterior maxillary segment and teeth after segmental le fort I osteotomy and postoperative skeletal elastic fixation with or without occlusal splint.

ABSTRACTObjectivesTo assess the short term dental and skeletal stability of the anterior maxillary segment after segmental Le Fort I osteotomy with postoperative skeletal elastic fixation with or without occlusal splint.Material and Methods29 consecutive patients underwent segmental Le Fort I osteotomy and elastic skeletal fixation was applied. Patients were divided into two groups according to whether a fixed occlusal splint was used for six weeks (group A) or dismounted perioperatively (group B). Changes in landmarks and reference planes between the two timepoints were estimated on lateral cephalometric radiographs.ResultsGroup A: The upper incisor had a mean intrusion of -0.56 mm (SD 0.77; range -2.04 to 1.08 mm) and a mean posterior movement of -0.93 mm (SD 1.03; range -2.52 to 0.96 mm). The mean change in the axial inclination of the upper incisor was -0.33° (SD 2.56; range -6° to 4°) (95% CI: -1.75 to 1.08°). Group B: The upper incisor had a mean intrusion of -0.13 mm (SD 1.36; range -1.92 to 3.6 mm) and a mean anterior movement of 0.11 mm (SD 1.78; range -2.88 to 3.84 mm). The mean change in the axial inclination of the upper incisor was -0.07° (SD 3.05; range -5° to 5°) (95% CI: -1.83 to 1.69°). There was no statistically significant difference in stability between the two groups at the P value 0.05.ConclusionsThe skeletal anterior fixation with postoperative elastics for eight weeks may not compromise the early postoperative dental and skeletal stability of the anterior segment in segmental Le Fort I osteotomy.

Esthetic outcome evaluation of maxillary anterior single-tooth bone-level implants with metal or ceramic abutments and ceramic crowns.

The aim of this study was to evaluate the treatment outcome of implants placed in the maxillary anterior segment. Patients were treated with bone-level implants (Straumann Bone Level Implant, Institut Straumann) that supported all-ceramic single crowns and were followed for 2 to 4 years. Titanium or ceramic abutments were used according to the quality of the soft tissue at each site. Esthetic parameters were recorded to assess treatment outcomes. Pink esthetic scores (PES) and white esthetic scores (WES) were used to evaluate the esthetic outcome of anterior single-tooth implant-supported crowns. Patient satisfaction was also evaluated by means of a questionnaire. Fifty-five implants were placed in 47 patients. At the recall examinations, all implants were confirmed to have successfully integrated and demonstrated healthy peri-implant soft tissues, as documented by generally accepted clinical parameters. Overall, the esthetic results were considered favorable, and there were no significant differences between restorations with ceramic or titanium abutments. WES values were slightly superior to PES values. None of the implants had mucosal recession. Objective and subjective evaluation of maxillary bone-level implants in the esthetic zone yielded satisfactory results. Pleasing esthetic outcomes and stable facial soft tissues were achieved.

Management of Sub Condylar Fracture in 15 yr Old Patient : Case Report

The topic of condylar injury in adults has generated more discussion and controversy than any other in the field of maxillofacial trauma. It is an important subject because such injuries are common and complications of trauma to the temporomandibular joint (TMJ) are far-reaching in their effects.The aim of this paper is to report one of such cases. A 15 yr male patient reported to our department with a chief complaint of inability to close mouth. On examination and radiographs the case was diagnosed as left sub condylar fracture and dento-alveolar fracture of anterior maxillary segment. The case was posted for operation under GA. And the dento alveolar fracture to be treated with Arch Bar and left sub-condyle fracture by open reduction and internal fixation.

Treatment of Postoperative Midfacial Deformity of Chilopalatognathus by Distraction Osteogenesis With a Self-Constructed Tooth-Borne Distraction Device

Distraction osteogenesis has recently evolved a challenging technique to overcome major drawbacks of the traditional orthodontic treatment modalities. The aim of this study was to evaluate the therapeutic efficacy of patients with chilopalatognathus who have premaxillary deficiency through distraction osteogenesis using a self-constructed tooth-borne distraction device. Individual tooth-borne distraction devices were used for advancement of the maxillary anterior segment. Distraction was performed for 26 patients in accordance with the specific requirements of each individual. Cephalometric radiographs were taken before treatment (T1), after distraction (T2), and after consolidation for 8 weeks (T3). Cephalometric analysis revealed that the premaxilla was moved forward and that the length of palatal plane increased. In 2 cases, the distractor did not work during distraction and was removed. Distraction osteogenesis using individual tooth-borne distraction devices in patients with chilopalatognathus could effectively resolve soft tissue insufficiencies and hypoplasia of the maxilla.

Esthetic crown lengthening for maxillary anterior teeth: an interdisciplinary case report

Dentists are called on to provide restorations that are harmony with the lips, the face, the adjacent teeth, and a healthy periodontium. Periodontal theraphy plays an important role in the esthetic rehabilitation of the maxillary anterior segment, especially if the periodontal disease is present. This case report describes an interdisciplinary approach to the management of upper central incisors and application of Turkom-Cera all-ceramic fixed partial denture.Turkom-Cera all-ceramic fixed partial denture provides adequate aesthetics and function.

Advancement of maxillary anterior segment by distraction osteogenesis for severe maxillary retrusion in cleft lip and palate

Background Maxillary anterior segmental distraction osteogenesis (MASDO) is a recently used method for correction of severe maxillary retrusion in cleft lip and palate (CLP) patients. In this article, we evaluated the feasibility of MASDO using rigid external distraction (RED) and rapid orthodontic tooth movement to correct severe maxillary retrusion in CLP patients. Methods Fourteen male and five female complete CLP patients between the ages of 18 and 22 years (mean age 19.7 years) at the time of distraction, with severe maxillary retrusion, were treated with the rigid external distraction (RED) device after maxillary anterior osteotomy. Rapid orthodontic tooth movement was started one week after the MASDO. Standard profile photographic, cephalometric films were obtained preoperatively and after therapy. Sella-nasion-point A (SNA) and Sella-nasion-point B (SNB) angles were measured to reflect changes in maxillary and mandibular position, and the distance between anterior nasal spine and posterior nasal spine (ANS-PNS) was measured to represent the maxillary dental arch length. Results The SNA angle increased from an average of 74.6° (range 73.0°-78.0°), preoperatively, to 83.4° (range 78.6°-88.0°) after the RED was removed (P <0.01). All cases of severe maxillary retrusion were improved. Nine patients' profiles became harmonious after therapy. One patient had a bimaxillary protrusion deformity and needed further surgery. The regenerate alveolar crest and edentulous space on both segments was almost completely eliminated after rapid orthodontic tooth movement. Conclusion MASDO with the RED system and rapid orthodontic tooth movement is a successful way of correcting severe maxillary retrusion in CLP patients.

多分割 Le Fort I 型骨切り術を併用した上下顎移動術 −ガミースマイルと上顎歯列狭窄を伴った上顎前突および下顎後退症への応用−

A 21-year-old woman presented with maxillary protrusion and a gummy smile along with mandibular retrognathism. Moreover, an arch width discrepancy was observed between the maxilla and the mandible. After 10 months of presurgical orthodontic treatment using a multibracket appliance, multi-segment Le Fort I osteotomy and sagittal split ramus osteotomy were performed. In the maxilla, the upper first premolars were extracted, and subsequently the upper arch was divided with a piezoelectric device into 4 segments after a down fracture. The anterior maxillary segment was moved distally to close the space, and the posterior maxillary segments were moved laterally to correct the excessively narrow maxilla. After 3 months of postsurgical orthodontic treatment, a favorable facial profile and occlusal relationship were obtained. The total treatment period was 13 months. A multi-segment Le Fort I osteotomy greatly contributed to shortening the duration of therapy for arch width discrepancy between the maxilla and the mandible. These results suggest that piezosurgery might be effective and safe for multi-segment Le Fort I osteotomy.

Assessment of Corticotomy Facilitated Tooth Movement and Changes in Alveolar Bone Thickness - A CT Scan Study.

Corticotomy is an effective method of accelerating the orthodontic treatment. The aim of this study was to compare the treatment time for the extraction space closure, between corticotomy assisted and conventional orthodontic tooth movement and to check the alveolar bone thickness before and after corticotomy procedure in the corticotomy group. Cross-sectional clinical study. Twenty patients (age>15 y) requiring orthodontic treatment with upper anterior retraction in the extraction space of 1(st) premolar were selected and were randomised into control and corticotomy group each group consisted of 10 subjects. Pre retraction, corticotomy was performed in the maxillary anterior segment. The pre and post retraction CT scans were recorded and the thickness of the alveolar plates were measured at crestal level (S1), mid root level (S2) and apical level (S3) PreTreatment (T1). The same measurements were repeated after incisor retraction was completed PostTreatment (T2). Student's t-test, Pearson correlation coefficient. There was a significant difference in retraction time (days) between control and corticotomy groups (p<0.001). Also, there were significant difference in total alveolar bone thickness at the crest region for all the four incisor teeth (p<0.05). A significant difference was observed in total alveolar bone thickness at the S2 and S3 level for 11, 21 and 11, 12 and 22 (p<0.05) respectively. Alveolar corticotomies not only accelerates the orthodontic treatment but, also provides the advantage of increased alveolar width to support the teeth and overlying structures.

Camouflage of Severe Skeletal Class II Gummy Smile Patient Treated Nonsurgically with Mini Implants.

Skeletal class II has always been a challenge in orthodontics and often needs assistance of surgical orthodontics in nongrowing patients when it presents with severe discrepancy. Difficulty increases more when vertical dysplasia is also associated with sagittal discrepancy. The advent of mini implants in orthodontics has broadened the spectrum of camouflage treatment. This case report presents a 16-year-old nongrowing girl with severe class II because of retrognathic mandible, and anterior dentoalveolar protrusion sagittally and vertically resulted in severe overjet of 13 mm and excessive display of incisors and gums. Both maxillary central incisors were trimmed by general practitioner few years back to reduce visibility. Treatment involved use of micro implant for retraction and intrusion of anterior maxillary dentoalveolar segment while lower incisors were proclined to obtain normal overjet, and overbite and pleasing soft tissue profile. Smile esthetics was further improved with composite restoration of incisal edges of both central incisors.

Surgery management of rare hypertrophic frenum in an infant.

To report a rare case of a lateral frenum hypertrophy in an infant, this paper describes the case of a girl who came to a first dental appointment when she was 4 months old. A hypertrophic lateral frenum in the upper left canine region was detected. A great depression in the gingival rodet separated the anterior maxillary segment from the posterior one and also decreased the lip mobility in this region. A frenectomy was performed when the patient was 11 months old and the clinical follow-up was done up to the age of 30 months. There was normalization in the vestibular insertion of the lateral frenum, lip mobility, physiological development of the maxilla, and eruption of the upper incisors, canines, and first primary molars. Infants should go to a dental examination precociously in order to detect possible congenital and development alterations.

A Simultaneous Mobilization Of Four Impacted Upper Incisors In A Case Of An Adolescent Patient With Cleidocranial Dysplasia (CCD)

Introduction: Cleidocranial dysplasia (CCD) is often attended by a considerable number of supernumerary teeth combined with impaction of sometimes all permanent teeth. To help these patients obtain an esthetically pleasing and functional dentition, eruption of an appropriate number of permanent teeth should ideally be brought about, while all other teeth should be removed. The simultaneous traction of several neighboring teeth into the same direction is associated with biomechanical challenges. This report illustrates how these difficulties were solved in a specific treatment case. Findings and diagnosis: A 9-year-old boy presented with delayed tooth eruption. Major concern of the patient was the edentulous maxillary anterior segment. Clinical manifestation was confined to all deciduous canines and molars in both jaws and to the permanent mandibular central incisors. Radiographic examination revealed the impaction of all remaining permanent teeth as well as 20 supernumerary teeth and four third-molar buds. Cephalometric analysis revealed a tendency for skeletal class III in conjunction with a horizontal growth pattern. Treatment progress and outcomes: Utilizing a custom-planned appliance, four completely impacted maxillary incisors could be moved to esthetically and functionally acceptable positions within 8 months. The appliance used was supported exclusively by the maxillary deciduous teeth and the palate. Thanks to biomechanical considerations, the position of the anchor teeth could be fully preserved. Conclusions: Simultaneous mobilization of multiple teeth requires a customized approach that does justice to each patient’s individual situation. Meticulous treatment planning can prevent adverse effects even without the use of skeletal anchorage methods.

ANTERIOR LOOP CONNECTOR FIXED PARTIAL DENTURE IN REPLACING MISSING CENTRAL INCISOR: A CASE REPORT

ABSTRACT Replacement of single anterior tooth is a complex, challenging procedure that can be accomplished with implant-supported restorations as well as conventional porcelain-fused-to-metal and resin-bonded fixed partial dentures. Different esthetic treatment options must be explored iri treating such patients. Drifting of teeth into the edentulous area may reduce the available pontic space; whereas a diastema existing before an extraction may result in excessive mesiodistal dimension to the pontic space. Although rarely used, loop connectorsare sometimes required to address this problem of excessive mesio-distalpontic space. Loop connectors offer a simple solution for a situation involving an anterior edentulous space albeit with the maintenance of the diastema. This article presents a case with excessive space in the anterior region treated witha loop connector to achieve ideal esthetic results in the maxillary anterior segment.

Immediate Loading of Dental Implants in the Esthetic Region Using Computer-Guided Implant Treatment Software and Stereolithographic Models for a Patient with Eating Disorders

This manuscript describes the reconstruction of a maxillary anterior segment using immediate implant placement and immediate implant loading techniques, aided by computer-guided implant treatment software and stereolithographic models and surgical templates, in a patient with a history of eating disorder. Her medical and dental histories did not make her a candidate for the use of conventional 2-stage implant surgery and restorative procedures along with an interim removable prosthesis.

Management of Cleft Maxillary Hypoplasia with Anterior Maxillary Distraction: Our Experience.

Maxillary hypoplasia is a common developmental problem in cleft lip and palate deformities. Since 1970s these deformities have traditionally been corrected by means of orthognathic surgery. Management of skeletal deformities in the maxillofacial region has been an important challenge for maxillofacial surgeons and orthodontists. Distraction osteogenesis is a surgical technique that uses body's own repairing mechanisms for optimal reconstruction of the tissues. We present four cases of anterior maxillary distraction osteogenesis with tooth borne distraction device-Hyrax, which were analyzed retrospectively for the efficacy of the tooth borne device-Hyrax and skeletal stability of distracted anterior maxillary segment.

Surgical Orthodontic Treatment of Severe Skeletal Class II

This paper describes an adult Saudi male patient who presented with a severe skeletal class II deformity. The case was managed with a combination of presurgical orthodontic treatment followed by a double jaw orthognathic surgery and then another phase of orthodontic treatment for final occlusal detailing. Extraction of the four first premolars was done during the presurgical orthodontic phase of treatment to decompensate upper and lower incisors and to give room for surgical setback of the maxillary anterior segment. Double jaw surgery was performed: bilateral sagittal split ramus osteotomy for 8 mm mandibular advancement combined with three-piece Le Fort I maxillary osteotomy, 6 mm setback of the anterior segment, 8 mm impaction of the maxilla, and 5 mm advancement genioplasty. Although the anteroposterior discrepancy and the facial convexity were so severe, highly acceptable results were obtained, both esthetically as well as occlusally.

Three-dimensional retraction of anterior teeth with orthodontic miniplates in patients with temporomandibular disorder

Vertical dimension control is critical for adults with Class II high-angle malocclusions. If the patient has a temporomandibular disorder, this requirement is exacerbated. When extraction is planned, the treatment challenge is further increased. This article reports on a new biomechanical design (C-therapy) appropriate for anterior segment retraction with excellent control of the vertical dimension, even in a Class II high-angle patient with a temporomandibular disorder. Maximum retraction of the maxillary anterior segment can be achieved with a lingual retractor and a palatal miniplate without appliances on the maxillary posterior segments. Mandibular anterior vertical height was well controlled by a second miniplate in the mental region. This device also contributed to mandibular anchorage reinforcement. A patient with temporomandibular disorder symptoms treated with this approach is shown.

Maxillary Movement in Cleft Patients Treated with Internal Tooth Borne Distractor

Cleft lip and palate is associated with maxillary hypoplasia and retrognathism. Surgery and distraction have been the most common treatment approaches used. The aim of this study was to objectively assess the quantum and direction of movement of the anterior maxilla in cleft patients treated with an internal tooth borne distractor. A prospective clinical study design was followed in which 8 consecutive patients with cleft maxillary hypoplasia were included in the age range of 15-25years. All patients had undergone secondary alveolar bone grafting earlier. Anterior maxillary distraction was performed using a tooth borne appliance in all 8 patients after necessary osteotomy. Lateral cephalograms were obtained preoperatively, predistraction and postdistraction. The angular and linear change at the maxillary anterior segment, rotation of the palatal plane, mandibular plane, increase in lower facial height and vertical changes of the anterior and posterior dentoalveolar segments were measured. The movement of the anterior maxillary segment was demonstrated anteriorly and superiorly in all the patients. The anterior and posterior dentoalveolar heights were increased post-distraction. There was also an increase in lower anterior facial height and the mandibular plane angle. Predictable superior and anterior movement of the anterior maxilla along with significant increase in palatal length could be achieved with the internal tooth borne distractor leading to remarkable improvement in esthetics and better function.

The Use of Leukocyte- and Platelet-Rich Fibrin During Immediate Postextractive Implantation and Loading for the Esthetic Replacement of a Fractured Maxillary Central Incisor

I mplant-supported restoration of the maxillary anterior segment that is biologically, functionally, and esthetically acceptable following traumatic injuries in the maxillary anterior segment is always complex. Careful extraction of the fractured root, residual labial bone preservation, proper flap design, ideal positioning of the implant, appropriate softtissue contour, and the crown emergence are all important steps necessary to achieve a predictable, stable, functional, and esthetic success. However, healing of the tissues is always difficult to control and the development of new techniques and materials to improve these treatments is still necessary. The use of platelet concentrates is an interesting approach. Platelet concentrates for surgical use are widely used and continuously investigated in oral and maxillofacial surgery. The objective is to gather platelet growth factors and to inject them on a surgical site to stimulate the healing process. A significant percentage of the literature is focused on the platelet-rich plasma (PRP) families. PRP is a liquid platelet suspension often activated into a platelet-rich gel (like fibrin glues). Another technology called leukocyteand platelet-rich fibrin (L-PRF) allows for the preparation of strong fibrin membranes enriched with cells (activated platelets, leukocytes, circulating cells) and platelet growth factors. This autologous healing biomaterial is free of additives (no anticoagulant during blood harvest, no chemicals for activation), simple, inexpensive, and quick to prepare (15 minutes for all steps). This technique is specifically adapted to the practical needs in daily implant dentistry. Several articles have reported the use of these L-PRF membranes for the stimulation of bone and 1 Private practice, Turin, Italy. 2 Private practice, Ra’anana, Israel. 3 Clarion Research Group, Clarion, Penn. Department of Restorative Dentistry, State University of New York at Buffalo, Buffalo, NY. 4 LoB5 Unit, Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, South Korea. Department of Stomatology, Oral Surgery, and Dental and MaxilloFacial Radiology, School of Dental Medicine, University of Geneva, Geneva, Switzerland. * Corresponding author, e-mail: LoB5@mac.com DOI: 10.1563/AAID-JOI-D-12-CL.3802

Conservative reconstruction of the smile by orthodontic, bleaching, and restorative procedures

The following is a clinical case report of a patient whose chief complaint was the presence of generalized spacing in the maxillary anterior segment following orthodontic treatment. After meticulous clinical analyses and discussions of the clinical procedures to be adopted, dental bleaching was performed in both arches with 10% hydrogen peroxide (Opalescence Trèswhite Supreme 10% Hydrogen Peroxide - Ultradent Products, Inc., South Jordan, USA) after the conclusion and stabilization of orthodontic treatment. Then, the orthodontic appliance was removed and the diastemas in the maxillary anterior teeth were closed with Amelogen Plus (Ultradent Products, Inc., South Jordan, USA) resin composite. It was observed that the association of orthodontic, bleaching, and restorative procedures was capable of restoring dental shape, function, and esthetics, allowing the patient to smile without hesitation.

Is traditional treatment a good option for an adult with a Class II deepbite malocclusion?

The Tweed-Merrifield directional force technique is a useful treatment approach for a patient with a Class II malocclusion with dentoalveolar protrusion. The purpose of this case report was to present the diagnosis and treatment descriptions of a patient with an Angle Class II malocclusion complicated by tooth losses, severe dentoalveolar protrusion, and skeletal discrepancy. Treatment involved extraction of the maxillary first premolars, high-pull headgear to enhance anchorage, and high-pull J-hook headgear to retract and intrude the maxillary anterior segments. A successful outcome was achieved with traditional orthodontic treatment in this borderline surgical case.