Body dysmorphic disorder (BDD) in the orthodontic and orthognathic setting: A systematic review.

General prevalence of Body Dysmorphic Disorder (BDD), a psychiatric disorder in which patients focus on an imagined body defect not visible to others, varies between 0.7 and 2.5%. Up to 86% present with complaints in the area of teeth or face. Patients with BDD pursue an aesthetic rather than functional recovery, making BDD a possible contraindication to treatment. The aim of this systematic review was to review prevalence of BDD within the orthodontic and/or orthognathic population, to describe diagnostic tools for early detection of patients with BDD and to assess the outcome after treatment. A systematic search was conducted up to November 2020 using PubMed, Embase, Web of Science Core Collection and Cochrane Library. Following the screening of 1423 articles, 5 prospective studies were included. Prevalence of BDD within the orthodontic and orthognathic population varied from 5.2% to 13% (average of 6.2%). Literature showed a trend of higher BDD prevalence within younger, female and single patient population, although results are not conclusive. Questionnaires can be useful for preliminary detection of BDD. General anamnesis with questioning medical or psychiatric history, medication and personal expectations remains very important. Red flags could be previous consultations for the same problem or presence of psychiatric comorbidities. Prospective studies are necessary to map satisfaction of these patients and need for re-interventions after treatment.

Three dimensional assessment of segmented Le Fort I osteotomy planning and follow-up: A validation study.

OBJECTIVES: The planning accuracy and stability during follow-up of segmented Le Fort I osteotomy, often evaluated using 2D cephalometry and dental cast analysis, is controversial. The aim of this study is to develop and validate a 3D semi-automatic, voxel-based registration assessment protocol to evaluate planning accuracy and stability of segmented Le Fort I osteotomy with individualization of the maxillary segments. METHODS: Preoperative, immediate postoperative and six months postoperative CBCT images were used to evaluate accuracy and stability of the individual segments in 20 patients (13 female; 7 male) who underwent segmented Le Fort I osteotomy. Three translational (left/right, intrusion/extrusion, anterior/posterior) and three rotational (pitch, roll, yaw) dimensions were calculated for each maxillary segment by means of a user-friendly module. Inter- and intra-observer Inter Class Coefficient (ICC) and mean absolute difference (MAD) were calculated. RESULTS: The inter- and intra-observer reliability ICC varied between 0.93 and 0.99 for the translational and rotational accuracy and stability assessments, indicating excellent reliability. The MAD ranged between 0.21 mm and 0.32 mm for the translational error and between 0.6° and 0.9° for the rotational dimension. CONCLUSIONS: The 3D assessment protocol for accuracy of segmented Le Fort I planning and short-term follow-up, proved to have high reliability with only a small margin of error. CLINICAL SIGNIFICANCE: The proposed 3D assessment protocol allows future in-depth analysis of segmented Le Fort I osteotomy and might implicate future improvement where necessary.

Long-term dental stability after orthognathic surgery: a systematic review.

BACKGROUND: Long-term dental stability is one of the main objectives following combined orthodontic and orthognathic surgical treatment. It is influenced by multiple factors such as surgical, patient-related, and orthodontic aspects. While recent reviews mainly focus on short-term dental changes (0.5-2 years), longer follow-up dental stability remains hardly reviewed. OBJECTIVES: The aim of this study was to evaluate long-term stability of dental and dentolabial changes following combined orthodontic and orthognathic surgical treatment with a minimum follow-up period of 5 years. SEARCH METHODS: A systematic search was conducted up to December 2019 using Pubmed, Embase, Web of Science, and Cochrane Central. SELECTION CRITERIA: Randomized controlled trials (RCTs), prospective and retrospective cohort studies, and case series with a minimum of 10 patients, which reported long-term dental stability following combined orthodontic and orthognathic treatment, were included. DATA COLLECTION AND ANALYSIS: Long-term changes were assessed for overjet, overbite, maxillary, and mandibular incisors' position and relationship of lip position to maxillary and mandibular incisors. Risk of bias was assessed according to the Cochrane Handbook. RESULTS: Following the screening of 3178 articles, 11 studies were included (2 RCT, 9 retrospective) with a postoperative follow-up period ranging from 5 to 15 years. A decrease in overjet was observed for patients with skeletal class III malocclusion, whereas overjet increased in class II patients at long-term follow-up. Overbite increased in class II patients, whereas class III showed variable results. The lower incisor position was more stable vertically than horizontally; the latter showing more outcome variability. Dentolabial changes corresponded to the normal ageing process and results were not clinically significant after long-term follow-up. CONCLUSION: Current evidence suggests variability of dental and dentolabial stability in both skeletal class II and III patients. Further prospective studies are required to develop guidelines for long-term follow-up assessment using computer tomography or cone-beam computed tomography imaging, before final conclusions can be drawn. REGISTRATION: The protocol for this systematic review (CRD42020133844) was registered in the International Prospective Register of Systematic Reviews (PROSPERO).