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Biomedical subjects

G Widmark

Publications and source records attributed to G Widmark.

29 records · Page 2Linked to original sources
PubMed1992

The use of a bone lid to close the anterior wall defect after surgery in the maxillary sinus.

Surgery was performed in the maxillary sinus with restoration of the surgical defect in the anterior wall with a resutured bone-lid, in 12 patients with an average age of 45 years, the technique is described and evaluated clinically and radiographically (computed tomography). During the followup time of 1-4 years, the condition of the maxillary sinus was normalized. It is our opinion that the bone-lid technique for maxillary sinus surgery is useful, especially when good overview and access is necessary.

Adult↗
PubMed1991

Use of miniplates in the treatment of jaw fractures.

The use of miniplate-osteosynthesis in fracture treatment has been evaluated in 47 patients. In 25 of the patients plate fixation of the fracture was used without intermaxillary fixation and in 22 a supplementary IMF was used. Nine of the 47 patients had alcohol or drug addiction problems. The most common cause of fracture was assault and traffic accidents. The rate of complications including sensibility disturbances, occlusal disturbance and infection was evenly distributed among the two groups. The frequency of postoperative sensibility disturbances was however high, fifteen of the patients, although the sensibility returned in seven of these patients. Postoperative infections developed in five patients where the time between trauma and treatment exceeded three days. In no single case did the plate insertion make any damage to adjacent teeth.

Adult↗
PubMed1989

Osteoradionecrosis of the jaws.

In 431 patients treated for malignant tumors 21 osteoradionecroses (ORN) were diagnosed in 19 patients. The relation of ORN to radiotherapeutic factors and surgical as well as extraction schemes were studied. There was a clear relation to high dose, high CRE and superfraction. Six ORN developed in connection with tooth extraction. The importance of atraumatic extraction is stressed.

Aged↗
PubMed1988

Surgical treatment of the open bite deformity. Surgical correction of combined mandibular prognathism and open bite by oblique sliding osteotomy of the mandibular rami.

Treatment of open bite deformity combined with a prognathic mandible using the oblique, sliding osteotomy of the mandibular rami has been followed for 2 1/2 years to evaluate the final outcome of the operation. The clinical and radiographic examination during the control period show a remarkably stable result with a relapse magnitude the same or slightly less than that for a straight, set-back procedure. A certain dental compensation occurs during the skeletal relapse. The thought of creating a certain "freedom-space" in the muscular fibres during the set-back procedure, thus facilitating closure of the open bite is proposed. Surgical correction of the anterior open bite today is otherwise most frequently focused on solutions with maxillary le Fort I or subapical procedures to ensure minimal influence from the jaw muscles.

Cephalometry↗
PubMed1975

Separation of fresh tobacco smoke on a packed polar gas chromatographic column prior to on-line analysis by gas chromatography-mass spectrometry using a non-polar capillary column.

Gaseous samples of fresh tobacco smoke were injected on to a packed polar column (2,2-oxydipropionitrile) in all-glass chromatographic system. With the aid of a warm syringe, selected fractions were withdrawn from the bottom of the electron capture detector of the packed column for further injection into an efficient non-polar glass capillary column (SF-96), connectable on-line to a mass spectrometer. The method has permitted the separation and identification of some polar and non-polar components of tobacco smoke, which gave previously mixed, broad, tailing peaks when the smoke was injected directly into a non-polar capillary column.

Chromatography, Gas↗
PubMedDate not supplied

Absorption of ocular timolol.

The absorption of timolol after topical administration to the eye was studied in 11 healthy volunteers and in 5 patients with bilateral open angle glaucoma. The volunteers received 2 drops of 0.5% timolol ophthalmic solution in each eye, equivalent to 0.8 mg of timolol maleate. Overflow was absorbed by paper tissue. The patients received the same dose twice daily for 2 weeks and were then investigated. In the paper tissue, 12 to 88% of the dose administered was recovered. Plasma concentrations were never above 5 ng/ml and not always detectable (detection limit 1 to 2 ng/ml). However, timolol was absorbed as the drug was found in the urine samples from all volunteers and glaucomatous patients.

Absorption↗
PubMedDate not supplied

Rehabilitation of patients with severely resorbed maxillae by means of implants with or without bone grafts: a 3- to 5-year follow-up clinical report.

Forty three patients with severely resorbed maxillae who had been referred for implant treatment were assigned to 1 of 3 treatment options: bone grafting and implant placement (graft group), modified implant placement with no bone grafting (trial group), or optimized complete dentures (no-implant group). Sixteen, 20, and 7 patients, respectively, were assigned to the 3 groups. The patients have been examined annually, and at the time of this report they had been followed for 3 to 5 years after treatment. At the 1-year follow-up, 10% (22 of 221) of the implants had been lost, and at the 2-year follow-up, 18% of the implants had been lost (40 of 221; 25% in the graft and 13% in the trial group); after that time, no further losses occurred. Life table analysis showed cumulative success rates of 82% in the graft group and 96% in the trial group after 1 year, and 74% and 87%, respectively, at the final examination after 3 to 5 years. The failure rate was higher in smokers than in non-smokers. A substantial reduction of the grafted bone, especially of onlay grafts, occurred early after grafting surgery in many patients. Mean marginal peri-implant bone loss was 0.6 mm during the period from prosthesis connection to the 1-year follow-up, and from the 1-year to the 3-year follow-up, average peri-implant bone loss was 0.3 mm in the graft group and 0.5 mm in the trial group. The results corroborated previous findings that patients with severely resorbed maxillae have an increased risk of implant failure in comparison to patients with good bone quantity and quality. However, in this investigation, practically all implant losses occurred during the first 2 years, whereupon a steady state seemed to follow for up to 5 years after loading.

Aged↗
PubMedDate not supplied

Rehabilitation of patients with severely resorbed maxillae by means of implants with or without bone grafts. A 1-year follow-up study.

Forty-three patients with severely resorbed maxillae who had been referred for implant treatment were assigned to one of three treatment groups: bone grafting and implant placement (graft group); modified implant placement but no bone grafting (trial group); or optimized complete dentures (no-implant group). Sixteen, 20, and 7 patients, respectively, were assigned to the three groups. At the 1-year follow-up, 10% of the implants had been lost. Only a few of the failures (3/22) occurred after prosthesis placement. The cumulative success rates were 83% in the graft group and 96% in the trial group. A substantial reduction of the grafted bone, especially of the onlay grafts, occurred in many patients. During the period from prosthesis connection to the 1-year follow-up, marginal peri-implant bone loss was on average 0.5 mm. Despite the often demanding procedures involved, all but one patient in each implant group said that they would undergo the treatment again. Most patients were very satisfied with the treatment outcome and their improved masticatory ability. Those who had renounced implant treatment appeared modestly adapted to their optimized dentures, but reported retention problems and less satisfaction with mastication.

Adult↗