
Johan JansmaUniversity of Groningen | RUG · Department of Oral and Maxillofacial Surgery
Johan Jansma
MD DMD MSc PhD FEBOMFS
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122
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Publications (122)
Introduction
Several new systems of three-dimensional (3D) surface imaging of the face have become available to assess changes following orthognathic or facial surgery. Before they can be implemented into practice their reliability and validity must be established. Our aim was therefore to study 3dMD (stereophotogrammetry), Artec Eva and Artec Spac...
The purpose of this study was to assess the 1-year skeletal stability of the osteotomized maxilla after Le Fort I surgery, comparing conventional osteosynthesis with patient-specific osteosynthesis. Patients were assigned to a conventional or patient-specific osteosynthesis group using prospective randomization. The primary outcome was the three-di...
Introduction
This prospective controlled study evaluates volumetric, length, and average cross-sectional area (aCSA) airway changes in growing patients with unilateral complete cleft lip and palate after 1.5 years of bone-anchored maxillary protraction therapy.
Methods
Thirty-five growing unilateral complete cleft lip and palate patients with maxi...
Background:
Facial fat grafts decrease in volume after transplantation. This observation is based on overall facial 3D analyses, since there is sparse information on volume changes in well-defined aesthetic areas. We aimed to assess the overall and more specifically the local volumetric effects of facial fat grafting and relate these effects to pa...
Background
For decades, facial fat grafting is used in clinical practice for volume restoration. The main challenge of this technique is the variable volume retention. Over the past years, studies reported the addition of supplements to augment the fat graft to increase volume retention.
Objectives
The aim of this systematic review was to investiga...
Background
For decades, facial fat grafting is used in clinical practice for volume restoration. The main challenge of this technique is the variable volume retention. Over the past years, studies reported the addition of supplements to augment the fat graft to increase volume retention.
Objectives
The aim of this systematic review was to investig...
It is not yet established whether additional orbicularis oculi muscle excision leads to better patient-reported aesthetic outcomes (PRO) compared to a skin-only resection blepharoplasty. A double-blind randomized controlled trial of upper blepharoplasty, with or without muscle excision, was performed on 54 White European patients who assessed the p...
Purpose:
Upper blepharoplasty may be related to dry eye symptoms since the function of the orbicularis oculi muscle may affect the tear film. We aimed to assess the effect of blepharoplasty with or without the removal of a strip of orbicularis oculi muscle on tear film dynamics and dry eye symptoms.
Methods:
A double-blind, randomized, controlle...
This prospective controlled trial aimed to evaluate the skeletal effect of 3.5-years bone anchored maxillary protraction (BAMP) in growing cleft subjects with a Class III malocclusion.
Subjects and method:
Nineteen cleft patients (11.4 ± 0.7-years) were included from whom cone beam computed tomography (CBCT) scans were taken before the start of B...
The reproducibility of scanning in the periorbital region with 3D technology to enable objective evaluations of surgical treatment in the periorbital region was assessed. Facial 3D-scans of 15 volunteers were captured at different time points with a handheld Artec Space Spider structured light scanner. Two scans were made with a one minute interval...
Three-dimensional stereophotogrammetry is commonly used to assess volumetric changes after facial procedures. A lack of clear landmarks in aesthetic regions complicates the reproduction of selected areas in sequential images. A three-dimensional volumetric analysis was developed based on a personalized aesthetic template. The accuracy and reproduci...
The aim of this retrospective study was to investigate grafting in the osteotomy gap during bilateral sagittal split osteotomy (BSSO), using a xenograft and fibrin glue. Hard tissue defects in the inferior mandibular border were assessed using cone beam computed tomography scans taken 1 week and 1year postoperatively. The study group of 20 patients...
Background:
When an odontogenic infection extends into the neck, a life-threatening situation may develop as a result from airway obstruction, sepsis or mediastinitis. However, this is quite rare. Prompt treatment is important to minimise these complications.
Case description:
A 49-year-old woman presented to the oral and maxillofacial surgery o...
Although upper blepharoplasty is a common cosmetic surgical intervention, a better scientific understanding of the aesthetic results and the preferred surgical technique to achieve the best aesthetic results is still needed. A systematic search using four search engines (PubMed, Embase, CINAHL, and Cochrane) was performed to identify any study on t...
The accuracy of orthognathic surgery has improved with three-dimensional virtual planning. The translation of the planning to the surgical result is reported to vary by >2 mm. The aim of this randomized controlled multi-centre trial was to determine whether the use of splintless patient-specific osteosynthesis can improve the accuracy of maxillary...
Weight gain can affect the volume of a facial fat graft, resulting in unfavorable asymmetries. Weight gain during pregnancy is more complex and does not just entail an increase in adipose tissue. This case report objectifies whether pregnancy results in volume changes of a facial fat graft. A 24-year-old woman received a fat graft (7 ml) in the man...
Objective
This prospective controlled study evaluated the effect of bone-anchored maxillary protraction therapy in cleft children with Class III malocclusion using CBCT-derived 3D surface models.
Materials and subjects
Eighteen cleft patients between 10 and 12 years old were included. Intermaxillary elastics were worn after the placement of four z...
Objective:
Various functional outcomes after upper blepharoplasty are reported in the literature. We systematically reviewed the literature to assess the objective and subjective functional effects of upper blepharoplasty.
Methods:
After a systematic search of four search engines (Pubmed, Embase, Cinahl and Cochraine), any study on objective and...
Objectives:
The objective of this systematic review and meta-analysis was to determine the rates of survival and success and the complications related to autotransplantation of teeth with incomplete root formation. Additionally, we attempted to identify the prognostic factors that influence the outcome of tooth autotransplantation.
Materials and...
Purpose:
Asymmetrical expansion occurs in patients treated with Surgically Assisted Rapid Maxillary Expansion (SARME). In the clinical setting, this asymmetrical expansion is seen in multiple directions. However, the frequency, actual directions and amount of asymmetry are unclear. Hence, the aim of this study was to analyze the directions and amo...
Background
Biodegradable fixation systems could reduce or eliminate problems associated with titanium removal of implants in a second operation.
Aim
The aim of this study was to compare the long-term (i.e. >5 years postoperatively) clinical performance of a titanium and a biodegradable system in oral and maxillofacial surgery.
Materials and metho...
CONSORT Checklist 2010 checklist of information to include when reporting a randomised trial.
(DOC)
Protocol efficacy and safety aspects of biodegradable fixation systems: A randomized clinical trial.
English version of the original trial protocol as approved by the local Medical Ethical Committees of the 4 participating hospitals in the Netherlands.
(DOC)
Protocol effectiviteit En kosten aspecten van biodegradeerbare fixatie systemen: Een gerandomiseerde klinische studie.
Dutch version of the original protocol as approved by the Medical Ethical Committees of the 4 participating hospitals in the Netherlands.
(DOC)
Baseline characteristics and outcome measures of patients lost to long-term follow-up (i.e. >5 years) and patients not lost to long-term follow-up*.
*Analyses performed on all included patients, without the Protocol violations and the Treatment Received violations (see Fig 1), n = 221. †Tested two-tailed. Abbreviations: BSSO = bilateral-sagittal-sp...
Introduction:
Intraoperative application of stromal vascular fraction (SVF) of adipose tissue, requires a fast and efficient isolation procedure of adipose tissue. This review was performed to systematically assess and compare procedures currently used for the intraoperative isolation of cellular SVF (cSVF) and tissue SVF (tSVF) which still contai...
Because of the enormous and continuing increase in cases of skin cancer in the Netherlands, dentists will increasingly see patients with skin cancer. The most common malignant skin cancers are basal cell carcinoma, squamous cell carcinoma and malignant melanoma. With resection of a skin tumour, the oncological principles should be applied. For the...
To analyse the accuracy of maxillary positioning after Le Fort I osteotomy, we retrospectively assessed the outcome in three patients (mean (range) age 40 (21 – 60) years) who had been treated with patient-specific CAD-CAM osteosynthesis plates as part of a bimaxillary osteotomy. Virtual surgical planning in each case was based on cone-beam compute...
The high occurrence of orofacial cleft, particularly in South-East Asia, and the psychological and social-economic influence of the condition both advocate to rise attention for patient reported health outcomes in treatment evaluation.This especially applies for surgical procedures since these are invasive, rather drastic for patient and family, go...
The goal of a combined orthodontic-surgical treatment is to correct the dysgnathia and malocclusion and thereby achieve an improvement of function. As a supplement to osteotomy, enhancement of facial aesthetics is increasingly being used to gain more harmony in the face and/or to achieve facial rejuvenation. In this regard, one might think of conto...
This case report describes the autotransplantation of maxillary right second premolar into the contralateral position in a 14-year-old female using computerized tomographic data and a customized guiding system produced by computer-aided design/computer-assisted manufacture technology. Using innovative surgical guides and keys with navigation featur...
Background:
With the advents of new processing techniques and new graft survival theories in fat grafting, the question is: Which processing technique is of preference? This study systematically reviewed literature regarding current techniques for processing fat grafts.
Methods:
PubMed, Embase, Cinahl, and Cochrane databases were searched until...
Background: With the advents of new processing techniques and new graft survival theories in fat grafting, the question is: Which processing technique is of preference? This study systematically reviewed literature regarding current techniques for processing fat grafts. Methods: PubMed, Embase, Cinahl, and Cochrane databases were searched until Aug...
Biodegradable fixation systems could reduce/delete the problems associated with titanium plate removal. This means less surgical discomfort, and a reduction in costs.The aim of the present study was to compare the cost-effectiveness between a biodegradable and a titanium system in Maxillofacial surgery.This multicenter RCT was performed in the Neth...
Einführung: Zur Verkürzung der Behandlungsdauer bei Jugendlichen und Erwachsenen sind Kortikotomien und dentale Distraktionsverfahren als effektive und sichere Maßnahmen vorgestellt worden. Im Rahmen einer systematischen Übersichtsarbeit sollte die Evidenz dieser Aussagen überprüft werden.
Methoden: Die Literaturdatenbanken PubMed, Embase und Cochr...
Several surgical techniques based on corticotomy and dental distraction have been developed to improve the movement of teeth and reduce the duration of orthodontic treatment. In this systematic review we have critically assessed published studies on the experimental movement of teeth to find out whether operations such as corticotomy and dental dis...
Intensieve huidbehandelingen nemen een steeds prominentere plaats in bij de behandeling van gezichtsveroudering. Deze behandelingen zijn gericht op het creeren van een selectieve beschadiging van het oppervlak van de huid waarna genezing optreedt, de zogenoemde ‘resurfacing’ van de huid. Tijdens de genezing worden fibroblasten gestimuleerd om nieuw...
Intensive skin treatments are gaining an ever more prominent place in the treatment of facial aging. The goal of these treatments is to cause selective damage to the skin surface, after which the healing process begins, the so-called 'resurfacing' of the skin. During the healing period fibroblasts are stimulated to produce new collagen and elastin,...
Alloplastic augmentation materials can be used to change or to accentuate facial contours and to add facial v olume. These implants are usually inserted in a subperiosteal pocket but can also be placed supraperiostally. The most popular facial implants are made of solid silicone, porous polyethylene or porous hydroxylapatite. Several sizes of anato...
Biodegradable fixation systems could reduce or eliminate the problems associated with removal of titanium plates. A multicenter randomised controlled trial (RCT) was performed in the Netherlands from December 2006-July 2009, and originally 230 injured and orthognathic patients were included. The patients were randomly assigned to either a titanium...
A prominent characteristic of the aging face is the descent of skin and subcutaneous tissues. In order to reduce this and create a more youthful appearance, several lifting procedures can be employed. In the forehead and eyebrow region the transblepharoplastic brow lift, the direct brow lift, the temporal brow lift, the coronal brow lift and the en...
Blepharoplasty is the most commonly performed procedure in aesthetic facial surgery. The upper eyelid is part of the same aesthetic subunit as the eyebrow and the lower eyelid is part of the same aesthetic subunit as the cheek. In upper eyelid blepharoplasty the excess skin and possibly also a portion of the sphincter is removed. A low-hanging eyeb...
Verlies van volume van de weke delen wordt gezien als belangrijke oorzaak van veroudering in het aangezicht. Dit volumeverlies is te compenseren door vettransplantatie. Hiermee kan een natuurlijk resultaat worden bereikt dat over langere tijd stabiel is. Vet wordt geoogst door liposuctie en na centrifugeren met stompe canules ingespoten in de doelg...
Loss of volume in the soft tissues of the face is considered to be an important cause of facial ageing. This volume loss can be compensated by microfattransfer. This technique offers a natural and long-lasting effect. Fat is harvested with liposuction and after centrifugation it is injected into the target areas in the face using small blunt cannul...
During the last decade cosmeticfacial procedures have become part of the professional work of both dentists and maxillofacial surgeons. A shift has taken place from invasive surgical treatment towards minimally invasive treatments. Besides the use ofbotulinum toxin type A, non-permanent wrinkle fillers can be an alternative to invasive surgical tre...
Corticotomy and dental distraction have been proposed as effective and safe methods to shorten orthodontic treatment duration in adolescent and adult patients. A systematic review was performed to evaluate the evidence supporting these claims.
PubMed, Embase, and Cochrane databases were searched until April 2013 for randomized controlled trials, co...
The aim of cosmetic facial surgery is to enhance facial beauty by reducing the effects of ageing or by beautifying certain aspects of the face. The face can be subdivided anatomically into the skin, the fat compartments, the ligaments (the links between the skin and the underlying facial skeleton), the superficial musculoaponeurotic system and the...
To avoid increasing the risk of thromboembolic events, it is recommended that treatment with anticoagulants should be continued during dentoalveolar operations. We have evaluated the incidence of bleeding after dentoalveolar operations in a prospective study of 206 patients, 103 who were, and 103 who were not, taking anticoagulants. Seventy-one wer...
Biodegradable osteosynthesis could reduce/delete the problems associated with titanium plate removal. The aim of the present study was to compare the clinical performance in the first 2 post-operative years between a biodegradable and a titanium system in oral and maxillofacial surgery. The multicenter randomized controlled trial (RCT) was performe...
Obstructive sleep apnea syndrome (OSAS) is a sleep-related breathing disorder, characterized by disrupted snoring and repetitive upper airway obstructions. Oral appliance therapy is an effective alternative to continuous positive airway pressure (CPAP) and is especially effective in mild and moderate OSAS cases. Successful oral appliance therapy ha...
In a recent RCT comparing biodegradable (Inion CPS) with titanium (KLS Martin) plates and screws for fixation of osteotomies or fractures, we found that in 21% of the cases the surgeon decided intra-operatively to switch from biodegradable to titanium. The aim of the current retrospective cohort study was to analyse the reasons for these switches i...
Biodegradable fixation systems could reduce or delete the problems associated with metallic systems, since removal is not necessary. The aim of this study was to establish the effectiveness and safety of biodegradable plates and screws as potential alternatives to metallic ones. This multi-center randomized controlled trial was conducted from Decem...
Three-dimensional imaging techniques have greatly improved our ability to assess asymmetry by means of linear and angular measurements. However, visualizing deformities enables a unique appreciation of the underlying deformity, which might not be possible by looking at quantitative numbers alone. This article describes the method of a mirror-image...
During the past decade, cosmetic facial treatments have become a standard element of the work of both dentists and oral and maxillofacial surgeons. A shift has taken place from invasive surgical treatments in the direction of minimally invasive treatments. One of the most frequently carried out minimally invasive treatments is the treatment with bo...
Background
Rhabdomyosarcoma is the most common malignant tumor in the nasal and paranasal sinus area at childhood. Multimodal treatment for this disorder has severe side effects due to normal tissue damage. As a result of this treatment, facial growth retardation and oral abnormalities such as malformation of teeth and microstomia can cause estheti...
Although distraction osteogenesis (DO) is widely used, there is minimal information on its use in patients after radiotherapy. The mutilating effects of ablative head and neck surgery, and insufficient development of the craniofacial skeleton after childhood head and neck malignancies, frequently necessitate complex reconstruction techniques. The s...
Over the past decade, facial cosmetic procedures have become more commonplace in dentistry and oral and maxillofacial surgery. An increasing number of patients seek minimal invasive procedures. One of the most requested procedures is treatment with botulinum toxin type A (BoNTA). Treatment of dynamic rhytids and lines with BoNTA is effective and pr...
Treatment planning in facial asymmetry is complex and requires precise diagnosis and planning. In the case of a fourteen year old boy with Parry Romberg syndrome, cone beam computerized tomography scanning was used to analyse the asymmetry. Linear, angular and volumetric measurements helped to make clear the extent of the asymmetry, giving the orth...
Adult patients with a Class II skeletal base are often treated by a combined orthodontic and surgical approach. Advancement of the mandible, most often including a bilateral sagittal split osteotomy (BSSO), is preceded by orthodontic alignment and frequently the curve of Spee is levelled. When the chin is prominent, there is a risk of accentuating...
Neurosensory disturbance (NSD) of the inferior alveolar nerve (IAN) is the most common complication after bilateral sagittal split osteotomy (BSSO) and distraction osteogenesis (DO) of the retrognathic mandible. It is suggested that the risk is lower after DO than after BSSO. This retrospective study compared both techniques with regard to long-las...
Orofacial anomalies are generally treated by a combination of orthodontics and oral and maxillofacial surgery. The application of distraction osteogenesis offers new possibilities for treatment such as mandibular widening in the transverse direction and lengthening of the vertical mandibular ramus. It has also become apparent that distraction osteo...
De aanpak van orofaciale afwijkingen is gewoonlijk gecombineerd orthodontisch-chirurgisch van aard. De toepassing van distractieosteogenese biedt nieuwe behandelmogelijkheden, zoals verbreding van de mandibula in transversale richting en verlenging van de ramus mandibulae. Inmiddels is gebleken dat distractieosteogenese een zeer bruikbaar alternati...
The aim of this study was to evaluate satisfaction with treatment among cleft lip and palate patients who underwent maxillary advancement using a rigid external distraction (RED) device. Nine patients (four boys, five girls), mean age 17.7 years (SD 4.0), were included in the study. Outcome measures included satisfaction with facial appearance and...
Bilateral sagittal split osteotomy (BSSO) and distraction osteogenesis (DO) are the most common techniques currently applied to surgically correct mandibular retrognathia. It is the responsibility of the maxillofacial surgeon to determine the optimal treatment option in each individual case. The aim of this study was to review the literature on BSS...
Detection of focal infections aims at the identification and subsequent treatment of sources of odontogenic inflammation in order to prevent health threats in patients who are often medically compromised. Examination for dental foci often precedes medical treatment of patients with increased risks of endocarditis, patients with a joint prosthesis,...
The aim of this study was to evaluate the objective and subjective morbidity of symphyseal chin bone harvesting used for reconstruction of alveolar defects in young cleft patients.
All patients who had undergone chin bone harvesting for alveolar cleft reconstruction in the period from 1992 through 2000 at the Department of Oral and Maxillofacial Su...