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Biomedical subjects

J Hovinga

Publications and source records attributed to J Hovinga.

At least 19 recordsLinked to original sources
PubMed1993

Facial palsy after sagittal split osteotomies. A survey of 1747 sagittal split osteotomies.

Facial nerve palsy following a sagittal split osteotomy is a rare but serious complication. The incidence of facial nerve injury in a group of 1747 patients who had undergone a bilateral sagittal split osteotomy (3494 sagittal splits) was determined and proved to be 0.26% (9 cases). The case histories of 2 patients are presented, and the etiology, diagnosis, treatment and prevention of this complication are discussed.

Adult↗
PubMed1990

[Four years after augmentation of the resorbed mandibular alveolar ridge with hydroxylapatite granules].

In seven patients with an onlay of hydroxylapatite granules on the severely resorbed mandible the results are reported after four years. Radiographic evaluation showed some loss (a median loss of 7%) of height of the onlay in five of the seven patients. The granules in the upper part of the onlay proved to be smaller, probably as a result of fragmentation. The underlying bone, however, had remained unchanged.

Alveolar Bone Loss↗
PubMed1987

Odontogenic infection leading to orbital cellulitis as a complication of fracture of the zygomatic bone.

We describe a 51-year-old man in whom chronic maxillary sinusitis developing from a deep periodontal pocket, at 26, gave rise to cellulitis of the left orbit. The immediate cause was a fracture of the left zygomatic bone with some displacement of the infraorbital margin and the orbital floor. Treatment consisted of drainage and antibiotic medication. The zygomatic bone fracture was not reduced. Eye movements returned to normal and visual acuity was not permanently affected.

Cellulitis↗
PubMed1979

Regional odontodysplasia.

Regional odontodysplasia was diagnosed in a girl aged 6 with lesions of a number of deciduous and permanent teeth in the right lower and upper quadrants. The literature comprises reports on some 50 cases of regional odontodysplasia, including only one patient who also showed involvement of both the maxilla and the mandible.

Child↗
PubMed1979

A follow-up of osteotomies for dysgnathia.

An invitation to report for a follow-up was accepted by 74 patients (51 females and 23 males) who had undergone various types of osteotomy (50 mandibular and 30 maxillary osteotomies; 6 patients had undergone both mandibular and maxillary osteotomy). Their age at the time of operation ranged from 15 to 44 years. The follow-up period ranged from 3 months to 7 years. Maxillary osteotomy was never followed by a relapse, but 12 of the 50 patients treated by mandibular osteotomy showed some relapse: hyperplasia of the mandibular condylar process caused some relapse in 2 cases, and in 10 other cases only partial relapse (1, 2 or 3 mm) occurred. The distribution over the various types of operation corresponded with the various methods used in the entire series, so that no particular type of operation had evident advantages or disadvantages. It is essential that stable occlusion is achieved during the operation. Osteosynthesis of the fracture fragments proved unnecessary after a sagittal split operation. No indications that an oversize tongue played a role were found. The results with regard to the temporomandibular joint were particularly favorable. Stable occlusion is essential in preventing relapse; this is one of the reasons why a careful long-term follow-up is indicated (at 2-year intervals). For the time being this is perhaps best carried out by the operating surgeon, who has previous models and knows the patient.

Adolescent↗
PubMed1976

Some aspects of zygomaticomaxillary fractures.

Early diagnosis and treatment of zygomaticomaxillary fractures are essential. From results obtained in the treatment of 500 patients with fractures of the zygomaticomaxillary complex it was concluded that insertion of an implant on the orbital floor through an infra-orbital incision can be avoided. This procedure is seldom indicated, and has to be reserved for some old untreated fractures. However, it may also be indicated for young children with a blow-out fracture of the orbital floor (solitary or as part of a zygomaticomaxillary fracture). In these cases an approach through the maxillary sinus, as commonly used in adults, will result in injury or removal of the dental germs, which are still localized high in the maxilla. The possible cause of a blow-out fracture of the orbital floor (traumatic lesion of the infra-orbital margin) is discussed with reference to recent literature and to a number of patients, including a boy aged 7 1/2 years.

Child↗
PubMed1975

Some findings in patients with uraemic stomatitis.

Uraemic stomatitis may occur in patients with advanced renal failure. Thirteen patients with severe oral lesions due to their uraemic state are discussed. The stomatitis became manifest after a few days of severe renal failure (blood urea level was at least 20 mnol./1) and persisted for 2-3 weeks even when the urea concentration had decreased.

Adult↗
PubMed1975

Fractures of the middle third of the face.

Middle third fractures have increased in number over the past two decades. Since different disciplines take an interest in their management different names are often given to identical fractures. We classify the fracture types, and their treatment is briefly discussed. Results of treatment of about 500 patients with middle third facial fractures are presented. Part of the fracture involved one or both orbits. A comparison with recent literature was made. Early diagnosis and treatment is essential. Insertion of an implant on the orbital floor through an infraorbital incision can be omitted in fresh fractures. This procedure is rarely indicated except in some old untreated fractures.

Diagnosis, Differential↗