Re: Download Contemporary Treatment Of Dentofacial Deformity Profit 8

[Celena Holtzberg]

INTRODUCTION
Dentofacial deformity refers to deviation from normal facial proportion and dental relationship that is severe enough to be handicapping. The affected individuals are handicapped in two ways, first jaw function is compromised and second dental and facial appearance often leads to discrimination in social interactions [1]. Orthognathic surgery involves the surgical manipulation of the elements of the facial skeleton to restore the proper anatomic and functional relationships in patients with dentofacial skeletal anomalies [2]. Data shows that between one third and one half of the patients with dentofacial deformities have high level of psychologic distress, high enough to predict continuity problems in interpersonal relationships and significantly affect overall quality of life [3,4].
We here present a case of a young female with dentofacial deformity and severe psychosocial distress which was managed by bimaxillary orthognathic surgery with excellent functional and esthetic results.
CASE REPORT
A 23 years female reported to Armed Forces Institute of Dentistry for correction of her gummy smile, lip separation at rest and proclined upper teeth. History revealed that she was undergoing orthodontic treatment for past 3 years but was dissatisfied with her facial appearance and progress of treatment. She was anxious to improve her social life. Local examination showed lip incompetence (12 mm separation at rest), excessive maxillary incisor display at rest (12 mm), excessive gingival display on smile (5 mm), convex facial profile and retrognathic mandible with retruded chin. Intraoral examination showed good oral health with increased overjet (5 mm) and overbite (6mm), missing mandibular 1st molars and maxillary 2nd premolars, spacing in both maxillary and mandibular teeth, Class II dental relationship and excessively proclined lower incisors (a legacy of the previous orthodontic treatment to mask skeletal discrepancy) with apex buldge at lingual aspect.
Radiographic and other investigations included Orthopantomogram (OPG), Lateral Cephalogram, detailed cephalometric analysis, study models, and photographic analysis. OPG showed mesially tipped mandibular 2nd molars and no bone pathology. On cephalometric evaluation SNA was 85o, SNB 72o and ANB 13o. Vertical analysis showed 7mm of vertical excess.
On the basis of clinical examination and other investigations a diagnosis of skeletal class II malocclusion with mild vertically high angle and convex facial profile was made.
Treatment options of camouflage and orthognathic surgery to correct this severe skeletal dentofacial deformity was given to the patient. Patient opted for orthognathic surgery.
Treatment plan was made on the basis of clinical examination. Investigations/analysis were carried out and consisted of:
1. Orthodontic leveling and alignment of arches with torque of the mandibular central incisors to improve their axial inclination and closure of spaces.
2. Orthognathic surgery,
a. Le-Fort I osteotomy for superior repositioning of maxilla 7mm and to push back maxilla 4mm.
b. Bilateral sagittal split osteotomy for achieving Class I dental relationship by advancing mandible 5mm.
c. Forward sliding genioplasty for increasing chin prominence 8mm.
Post surgical care and orthodontics.
After 6 months of orthodontic preparation, overjet had increased as the axial inclination of lower incisors were corrected, all the spaces were closed and occlusal relationship was still Class II.
During the orthognathic surgery maxilla was moved up and posterior by Le Fort I osteotomy, mandible was brought forward in Class I dental relationship with bilateral sagittal split osteotomy and chin was advanced to increase chin prominence by forward sliding genioplasty. At the completion of treatment both static and dynamic facial esthetics were greatly improved by the reduction in facial convexity and face height.
A dramatic change in patients profile occurred after surgical intervention (Fig.1). Patient is now confident with her new remarkably improved facial appearance.
Post operative OPG and lateral cephalogram showed that as planned mandible was brought forward on both sides, maxilla has moved posteriorly and superiorly and chin has moved forward (Fig. 2).
DISCUSSION
Dentofacial skeletal anomalies generally occur as a result of a differential in growth of the upper facial skeleton to the lower facial skeleton, resulting in discrepancy of the normal relationship that exists between the upper and lower jaw. Congenital anomalies, from syndromic conditions such as Apert and Crouzon syndromes to facial clefts, affect normal growth and development [5]. Traumatic events in the mature skeleton can displace the normal elements and require repositioning osteotomies if improperly reduced initially whereas traumatic events in the developing facial skeleton can disturb normal subsequent growth [6].
A wide range of clinical presentation is possible ranging from convex to concave profile, increased or decreased lower and upper facial height, excessive gingival display, markedly disturbed occlusion and facial esthetics and most importantly adverse psychosocial impact resulting from an abnormal facial appearance [7, 8].
Diagnosis is based on a comprehensive assessment that includes clinical examination, skeletal evaluation with standardized radiograph and dental evaluation with study dental casts. Clinical photographs are essential for documentation and allow for photometric analysis. Skeletal evaluation typically includes radiographic evaluation with OPG and cephalometric radiographs, additional radiographs include periapical films and hand wrist films [9] to help determine skeletal age of patient. Recently data base computer programs [10] have been introduced including digital photography, digitized cephalometric examination and electronic dental casts.
Treatment can be divided into 5 phases [2, 11].
1. Preorthodontic preparatory phase
2. Presurgical orthodontic treatment phase
3. Surgical phase
4. Postsurgical orthodontic phase
5. Prosthodontic treatment phase
The elements of the facial skeleton can be repositioned, redefining the face through a variety of well-established osteotomies, including LeFort I-type osteotomy, LeFort II-type osteotomy, LeFort III-type osteotomy, maxillary segmental osteotomies, sagittal split osteotomy of the mandibular ramus, vertical ramal osteotomy, inverted L and C osteotomies, mandibular body segmental osteotomies, and mandibular symphysis osteotomies. Most maxillofacial deformities can be managed with 3 basic osteotomies: the mid face with the LeFort I-type osteotomy, the lower face with the bilateral sagittal split ramal osteotomy of the mandible, and the horizontal osteotomy of the symphysis of the chin [2].
Outcome depends on the surgical procedure, on a multitude of factors that begin long before the actual surgery, and on control of the variables long after the surgical procedure. If mobilization of the maxilla at the time of surgery is inadequate, obtaining a less-than-ideal occlusal relation, the post surgical orthodontic phase is prolonged and the likelihood of relapse increased [12]. With any skeletal movement, the surgeon always must be aware of the potential for relapse even in the most ideal situation and with the use of rigid internal fixation.
Although orthognathic surgery involves restoring the skeletal anatomy, the patient ultimately is concerned with how the soft tissue drapes the new facial skeleton. The surgeon must be well aware of the soft-tissue response to skeletal movements. The goal is not necessarily to normalize cephalometric values; rather, the aim should be for the patient to have normal appearance and function. The patient basically decides to undertake surgery for cosmetic reasons while the surgeon proposes surgery to improve function. The psychological consequences of orthognathic surgery must be taken into account because the impact is considerable.

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Download contemporary treatment of dentofacial deformity profit 8

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Rare diseases are usually genetic, chronic and incurable disorders with a relatively low incidence. Developments in the diagnosis and management of rare diseases have been relatively slow due to a lack of sufficient profit motivation and market to attract research by companies. However, due to the attention of government and society as well as economic development, rare diseases have been gradually become an increasing concern. As several dental-craniofacial manifestations are associated with rare diseases, we summarize them in this study to help dentists and oral maxillofacial surgeons provide an early diagnosis and subsequent management for patients with these rare diseases.

Recently, the National Health and Health Committee of China first defined 121 rare diseases in the Chinese population. The list of these rare diseases was established according to prevalence, disease burden and social support, medical technology status, and the definition of rare diseases in relevant international institutions. Twenty million people in China were reported to suffer from these rare diseases.

In this review, we aim to summarize the related manifestations and treatment of dental-craniofacial disorders related to rare diseases, thus helping to improve understanding and certainly diagnostic capacity for dentists and oral maxillofacial surgeons.

Ectodermal dysplasias (EDs) are a group of more than 150 different genetic disorders deriving from ectodermal structural abnormalities.7,8 Ectodermal dysplasias have been described as 'heritable conditions in which there are abnormalities of two or more ectodermal structures, such as the hair, teeth, nails, sweat glands, salivary glands, cranial-facial structure, digits and other parts of the body'.7 The abnormality in the development of tooth buds frequently results in congenital hypodontia (both primary and permanent dentitions) and/or changes in tooth morphology or size, such as peg-shaped or pointed teeth, taurodontism and enamel defects, including hypoplasia.9 The degree of tooth missing is always in the mild to moderate range, and a wide variation is observed regarding which teeth are missing; however, the most frequently reported missing teeth are the first molars, upper central incisors and canines10,11,12,13,14 (Table 1). Accordingly, composite restorations or crowns are almost always necessary for children as early as 2 years of age, and multiple denture replacements are often needed as the child grows, with dental implants providing a potential option in adolescence when the jaw is fully grown. The current option of extracting teeth and substituting them with dental implants is quite common.15 Additionally, orthodontic treatment is further necessary during the early teenage years as part of the best multi-disciplinary approach. Furthermore, several studies have also reported reduced salivary secretion in ED patients, accompanied by a reduced buffering ability and increased bacterial counts.16,17,18,19,20 Therefore, a systematic preventive plan including fluoride use and the placement of fissure sealants will be especially important for patients with ED owing to their increased caries risk.

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