Orion Haas

Orion Haas
Pontifícia Universidade Católica do Rio Grande do Sul | PUCRS · Cirurgia Bucomaxilo Facial

DDS, OMFS, MSc, PhD
Oral and Maxillofacial Surgeon, Researcher and Professor

About

51
Publications
14,816
Reads
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407
Citations
Additional affiliations
March 2018 - present
Pontifícia Universidade Católica do Rio Grande do Sul
Position
  • Professor
January 2018 - present
Pontifícia Universidade Católica do Rio Grande do Sul
Position
  • Professor
Description
  • Oral and Maxillofacial Surgeon, clinics and research
Education
January 2020 - February 2020
Yale University
Field of study
  • Oral Maxillofacial and Craniofacial Surgery
August 2015 - December 2015
Centro Medico Teknon - Instituto Maxilofacial
Field of study
  • Oral and Maxillofacial Surgery
August 2015 - December 2015
Universitat Internacional de Catalunya
Field of study
  • Oral and Maxillofacial Surgery

Publications

Publications (51)
Article
Full-text available
This systematic review was conducted to evaluate the stability and surgical complications of segmental Le Fort I osteotomy. The search was divided into a main search (PubMed, Embase, and Cochrane Library), grey literature search (Google Scholar), and manual search. Twenty-three studies were included: 14 evaluating stability as the outcome and nine...
Article
Full-text available
The aim of this study was to conduct a systematic review to evaluate the accuracy and benefits of computer-aided planning in orthognathic surgery. The search was performed in PubMed, EMBASE, Cochrane Library, LILACS, and SciELO. The articles identified were assessed independently and in a blinded manner by two authors using selection criteria and e...
Article
Full-text available
Background: Locking reconstruction plates are used in the treatment of jaw trauma and diseases if there is a need for surgical resection and to prevent pathologic fracture after tumor excision. Fixation is typically performed using an extraoral approach. Methods: This article describes a technique for the intraoral fixation of locking reconstruc...
Article
Full-text available
The soft tissues of the facial profile may change after skeletal movement in orthognathic surgery. The aim of this study was to evaluate and compare the differences and correlation between hard and soft tissues after double-jaw surgery in skeletal Class III subjects. Radiographs from the following time points were assessed using Dolphin Imaging sof...
Article
Full-text available
Dentofacial deformities and their treatment have physical and psychological repercussions on quality of life (QOL). Seventy-four patients were evaluated preoperatively (T0) and at 4–6 months postoperatively (T1). Oral health-related QOL was assessed using the short form of the Oral Health Impact Profile (OHIP-14). There was a statistically signific...
Article
Dentoskeletal changes in minimally invasive surgically assisted rapid palatal expansion (SARPE) were evaluated using cone beam computed tomography (CBCT). This was a prospective study of 30 patients who underwent minimally invasive SARPE performed under local anaesthesia plus sedation by the same surgeon, in an ambulatory setting. Pre- and postoper...
Article
Potential complications related to pterygomaxillary disjunction have been widely described in the literature, most of them being due to the inaccurate and blind approach involved. The present study used preoperative virtual planning to establish a surgical cutting guide for pterygomaxillary osteotomy. It was placed in the maxillary tuberosity suppo...
Preprint
Due to its aesthetic implications, gummy smile is a common reason for consultation. When it is caused by a vertical excess of the maxilla, the ideal solution is orthognathic surgery. However, in borderline cases and when the cause is hyperactivity of the upper lip levator muscle complex, alternative conservative solutions can be considered, such as...
Article
The purpose of this study was to evaluate maxillary expansion, operative time and pain associated with a new minimally invasive surgical technique to treat maxillary hypoplasia in adult patients. Consecutive patients were included and prospectively analyzed. The technique consists in miniscrew-assisted rapid palatal expansion (MARPE), minimally inv...
Article
Purpose The aim of this study was to evaluate the nasolabial soft tissues effects in three different Le Fort I osteotomy techniques using cone beam computed tomography (CBCT) evaluation of three-dimensional (3D) volume surfaces. Materials and methods A retrospective study was designed, and three groups were evaluated: group 1, patients who underwe...
Article
Objectives A systematic review was performed to analyze the current evidence on three-dimensional (3D) computed tomography (CT) superimposition protocols used to assess dentomaxillofacial changes after orthognathic and orthofacial surgery. Accuracy, reproducibility, and efficiency were evaluated. Methods The search was divided into Main Search (Pu...
Article
A systematic review search was based on the PICOS approach, as follows: population: cleft lip and palate patients; intervention: Le Fort I osteotomy; comparator: different surgical protocols; outcome: stability, recurrence or surgical complications; study designs: only case reports were excluded from the review. No restrictions were placed on langu...
Article
Temporomandibular joint (TMJ) reconstruction with customized alloplastic implants has become a safe and effective treatment option of TMJ end-stage pathology with excellent outcomes reported in the literature. The purpose of this study is to report 5 cases of severe TMJ pathology and customized alloplastic reconstruction using a combined intraoral...
Article
Objectives The purpose of this overview was to assess different antibiotic regimens used in orthognathic surgery and establish an evidence-based protocol so that beneficial and adverse effects can be determined. Study design A comprehensive literature search for systematic reviews and/or meta-analyses was conducted in MEDLINE (PubMed), EMBASE, Coc...
Article
Full-text available
Purpose The aim of this study is to evaluate longitudinally the effectiveness of a multimodal protocol based on decompression followed by enucleation combined with the use of liquid nitrogen under local anesthesia for the treatment of odontogenic keratocysts. Methods Seven patients with a diagnosis of odontogenic keratocyst were evaluated longitud...
Article
The purpose of this study was to assess the relationship between the Frankfort horizontal (FH) and natural head orientation (NHO), their correlation between patients’ malocclusion, and the impact of counterclockwise rotation (CCW) on the FH-NHO angle variation after orthognathic surgery. An evaluation of 187 consecutive patients was performed at th...
Article
Full-text available
Purpose: Most studies have focused on airway changes after maxillomandibular advancement (MMA); however airway size will change depending on the type, direction and magnitude of each skeletal movement. The aim of this study was to assess the effect of the maxillary and/or mandibular movements upon the pharyngeal airway volume (PAV) and the minimum...
Article
The objective of this systematic review was to evaluate the stability and complications of tooth-borne (TB)¹, bone-borne (BB)² and hybrid (TB-BB)³ appliances in surgically assisted rapid maxillary expansion (SARME)⁴. Database searches were conducted (PubMed, Embase, Cochrane Library and SciELO), as well as a grey literature search (Google Scholar)...
Article
The aim of this study was to describe the steps of a minimally invasive surgical technique used to perform a proportional intraoral condylectomy with a three-dimensionally (3D) printed cutting guide. The technique consists of two steps: virtual surgical planning and intraoral condylectomy. During virtual surgical planning, the mandibular ramus was...
Article
After sagittal split osteotomy, the mandibular distal and proximal fragments do not always align themselves passively to one another, resulting in bony interferences and subsequent anomalous settlement of the condyles. Predicting these interferences could be an important ancillary procedure for avoiding intra- and postoperative surgical complicatio...
Article
Full-text available
Introduction Most miniplates used for skeletal anchorage lack built-in orthodontic devices. To address this issue, orthodontists must use creative solutions, such as bonding buttons, brackets, or tubes directly to the miniplates, thus making them more versatile devices that provide a wider range of tooth movement possibilities. The purpose of the p...
Article
The aim of this study was to verify soft tissues changes and the effect of a minimally invasive surgical technique in the nasolabial region after segmented and non-segmented Le Fort I osteotomy, using cone beam computed tomography (CBCT) evaluation of three-dimensional (3D) volume surfaces. Two groups were evaluated: group 1, bimaxillary surgery wi...
Article
The objective was to validate a semi-automated segmentation method for 3-dimensional (3D) reconstruction of the mandibular condyle from cone beam computed tomography (CBCT) data and illustrate its application in volumetric analysis of the condyle.Ten CBCT datasets were used to validate the proposed semi-automatic method for 3D rendering of mandibul...
Article
Objectives: The primary objective of the present study was to find the gold-standard accuracy of voxel-based superimposition of cone-beam computed tomography (CBCT) datasets with a protocol developed for the Dolphin Imaging 3D software. The secondary objectives were to analyze reproducibility and efficiency of this protocol. Study design: Twenty...
Article
The purpose was to perform an overview of systematic reviews in order to create a hierarchical scale of stability in orthognathic surgery with the aid of the highest level of scientific evidence. The systematic search was conducted in the PubMed, Embase, and Cochrane Library databases. The grey literature was investigated in Google Scholar and a ma...
Article
A systematic review was conducted to investigate the three-dimensional (3D) effect of Le Fort I osteotomy on the nasolabial soft tissues. The literature search was conducted using the MEDLINE (accessed via PubMed), Embase, and Cochrane electronic databases until January 2018. A total of 333 studies were identified (PubMed, n=292; Embase, n=41; Coch...
Article
Full-text available
PurposeSialolithiasis is defined as the presence of one or more calcified structures within the duct of a major or minor salivary gland. It occurs as a result of deposition of calcium salts around an accumulation of organic debris in the duct lumen. The main signs and symptoms are edema and bacterial infection with abscess formation. Methods This s...
Article
Introduction It has been suggested that alveolar corticotomies may accelerate tooth movement, broaden the scope of malocclusion types that can be treated orthodontically, decrease the need for extractions, and support long-term stability. Several techniques have been proposed, although the indications, ideal design and technical characteristics, po...
Article
Introduction: Adverse effects in the nasolabial region should be anticipated after Le Fort I osteotomy. Intraoperative factors such as the extent of surgical dissection, type of closure and perinasal soft tissue reconstruction seem to influence soft tissue response. Attempts to control these changes have been made over the years and several techni...
Article
Full-text available
Traumatic myositis ossificans (TMO) is a rare ossifying disease that occurs in the muscle or soft tissues. A case of TMO isolated in the temporalis muscle is reported. In the case described, calcification in the temporalis muscle was confirmed after computed tomography. Surgery, physiotherapy, and histopathological analysis were performed. One year...
Article
Full-text available
Introduction: Segmental maxillary osteotomy enables correction of anterior open bites. However, the outcome can be somewhat unstable, particularly if pseudarthrosis occurs. Bone grafts can be used to prevent this complication. Among the many biomaterials available for grafting, Bio-oss(®) has been used successfully in a range of modalities, with s...
Article
Full-text available
The orthognathic surgery is the standard treatment for the correction of dentofacial deformities, in order to get a stable dental occlusion and facial harmony. The advancement of technology and the evolution of the concepts involved in the diagnosis and treatment plan in this area have been immeasurable, leading to the development of new methods, s...
Article
Full-text available
The aim of the present study was to evaluate local and cytotoxicity systemic tissue reaction in the skull of rats using the implantation of disks of poly (lactic L/D-acid) and evaluate its genotoxicity. 25 males Wistar rats were used, 20 animals underwent surgical procedures and had the discs implanted in the parietal bone, and 5 animals received p...
Article
Full-text available
The pharyngeal airway may change after skeletal movement in patients who have undergone orthognathic surgery. The aim of this study was to evaluate the skeletal and pharyngeal airway changes in subjects with a Class III facial pattern who underwent double-jaw surgery (maxillary advancement and mandibular setback). The present retrospective study as...
Article
Full-text available
Hemimandibular hyperplasia is a facial deformity in which there is an increase in the condyle, neck of the condyle or ramus, and an occlusal cant. Different surgical treatments are proposed in the literature, from simple low or high condylectomy to more complex procedures combining osteotomies in different sites of the mandible. Surgical procedure...
Article
Full-text available
The attachment of bilateral sagittal-split osteotomy of the mandibular ramus with bicortical screws or the combination of miniplates and a bicortical screw is complicated through the intraoral approach because of the angle required for insertion of screws, so it is necessary to use a trocater. This article aimed to report a technique developed and...
Article
Full-text available
Purpose: the present study purpose is to define the profile of the group of risk for oral leukoplakia from the data base of the diagnosed cases in the Laboratory of Oral Pathology - College of Dentistry of the Federal University from Rio Grande do Sul in the period of 1999 - 2009. Methods: the study was based on the biopsy files of the Laboratory...
Conference Paper
In orthognathic surgery, Le Fort I osteotomy is one of the most often used methods for the correction of dental-facial deformities and is considered technically safe. However, this procedure may lead to diverse complications, including uncommon vascular complications. A clinical case is described of late development of pseudoaneurysm in one of the...
Article
Full-text available
Foreign bodies are often encountered by oral and maxillofacial surgeons and may present a diagnostic challenge to the trauma surgeon due to many factors such as the size of the object, the difficult access, and a close anatomic relationship of the foreign body to vital structures. They are usually a result of injuries or operations. Fragments of br...
Article
Full-text available
Introduction:Tonsillolith is a rare type of dystrophic calcification in the palatine tonsils or in the peritonsilar region, which can mimics several intraosseous radiopaque lesions when evaluated by two-dimensional or overlapping images.This may lead to an erroneous diagnosis and to invasive and unnecessary procedures.This study reports a case of t...

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Projects

Projects (3)
Project
To assess the impact of orthographic surgery on the upper airway and the apnea-hypopnea index to cure OSA.
Project
Increase the use of new technologies and protocols in oral and maxillofacial pathology.
Project
Virtual Planning with Dolphin