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Biomedical subjects

B Friberg

Publications and source records attributed to B Friberg.

51 records · Page 3Linked to original sources
PubMed1993

Histologic investigations on 33 retrieved Nobelpharma implants.

Thirty Nobelpharma implants were retrieved from 17 patients despite a remaining clinical stability, after between 1 and 16 years of clinical function. The reasons for implant removal were bone resorption in combination with soft tissue disorders, psychological causes, implant fracture and post mortem cases. When measured at the cortical passage, there was an average of 84.9% direct bone-to-implant contact and 81.8% average surface bone area in individual threads as evaluated in a computerized morphometric system at the light microscopic level.

Adult↗
PubMed1993

Thromboprophylaxis in emergency surgery.

Except for hip fracture surgery, emergency surgery has been only exceptionally studied concerning thromboprophylaxis. There are, however, several reasons to believe the frequency to be fairly high and that the patient group would be in need of prophylaxis. This paper discusses various emergency situations and also gives the design for an ongoing controlled study on the effect of postoperative start of thromboprophylaxis with low molecular weight heparin in emergency abdominal surgery.

Abdomen↗
PubMed1992

Inferior alveolar nerve transposition in combination with Brånemark implant treatment.

The surgical protocol for inferior alveolar nerve transposition together with the Brånemark implant treatment is described. The short-term follow-up results of the first ten procedures are presented and show an initial 2- to 3-week duration of anesthesia. In all regions treated, signs of paresthesia/hypoesthesia have been registered for 1 to 7 months. After 6 months, seven of the regions recovered completely with regard to nerve sensation.

Adult↗
PubMed1992

A new self-tapping Brånemark implant: clinical and radiographic evaluation.

A new self-tapping Brånemark implant designed for denser bone qualities was evaluated with regard to insertion technique, complications, marginal bone remodeling, and survival rate. Thirty patients, representing 21 mandibles and 9 maxillae, participated in the study. In each patient both standard and self-tapping implants were placed, and a total of 179 implants, 88 self-tapping and 91 standard, were inserted. Thirteen of 62 mandibular self-tapping implants reached their correct positions only after using the screw tap or the cylinder wrench for manual insertion. No such problems were noted when using standard fixtures after bone pre-tapping. In the maxillae, neither of the two implant designs presented any problems. One standard and one self-tapping fixture failed to osseointegrate. Radiolucencies were seen in the bone around the apical portion of two fixtures, one of each design. The mean marginal bone resorption after 1 year of follow-up was 0.5 to 0.6 mm for the two fixture types.

Adult↗
PubMed1991

Early failures in 4,641 consecutively placed Brånemark dental implants: a study from stage 1 surgery to the connection of completed prostheses.

This study comprised 4,641 Brånemark dental implants, which were retrospectively followed from stage 1 surgery to completion of the prosthetic restorations. The implants were placed during a 3-year period (1986 to 1988) in 943 jaws, representing 889 patients with complete and partial edentulism. The jaw and sex distribution revealed a predominance of mandibles (564/943) and females (534/943). The mean age of the patients was 57.5 years (range 13 to 88 years) at implant placement. Only 69 (1.5%) fixtures failed to integrate, and most losses were seen in completely edentulous maxillae (46/69), in which the jaw bone exhibited soft quality and severe resorption. A preponderance of failures could also be seen among the shortest fixtures (7 mm). A majority of the mobile implants were recorded at the abutment connection (stage 2) operation (48/69).

Adolescent↗
PubMed1987

Background factors and management of ectopic pregnancy in Sweden. Changes over a decade.

Hospital records of all women operated on for ectopic pregnancy (EP) in four Swedish towns during 1970-72 and 1980-82 were elaborated. The gynecological and obstetrical background was noted and the clinical picture and management was recorded and analysed. The incidence of EP more than doubled between the two periods. There was no major change in classical background factors between the periods, but the proportion of IUCD users rose from 4 to 16 percent. The use of hCG assays, curettage and ultrasound in establishing the diagnosis increased markedly and the proportion of women with ruptured tubes and heavy intra-abdominal bleeding decreased. Moreover there was a clear tendency towards a more conservative surgical approach in the latter period.

Adult↗
PubMedDate not supplied

Effects of phenylpropanolamine on ostial and nasal patency in patients treated for chronic maxillary sinusitis.

Ostial and nasal patency were measured in different body positions and after phenylpropanolamine (Ppa) treatment in 12 patients earlier treated for chronic unilateral maxillary sinusitis of varying severity. Six of the sinuses were of normal appearance on sinoscopy. Phenylpropanolamine in a single dose of 100 mg was found to increase the equivalent ostial diameter significantly in the sitting and recumbent positions. The drug also reduced the nasal airway resistance. The Ppa effect might be of benefit in patients treated for chronic maxillary sinusitis.

Adult↗
PubMedDate not supplied

Ostial and nasal patency in chronic maxillary sinusitis. A long-term post-treatment study.

In a long-term follow-up study (mean 3.5 years) after treatment of chronic maxillary sinusitis of either rhinogenous or dental origin, 72 sinuses in 66 patients were examined with respect to maxillo-ostial and nasal resistance. In sinusitis of rhinogenous etiology, the mean equivalent ostial diameter was pathologically narrowed (0.89 mm, in patients treated conservatively) whereas it was normal (2.51 mm) in sinusitis of dental etiology (dental treatment in combination with local sinus surgery). In the former group, all sinuses were diseased, compared with 3 out of 23 in the dental group. In order to distinguish between functional and organic ostial stenosis, the patients were also tested after physical exercise. The functional ostial diameter in healthy sinuses was significantly increased in contrast to the diseased sinuses. In one patient the narrow ostium was due to mucosal swelling only, but in the other cases was caused mainly by an organic stenosis. In sinusitis of rhinogenous etiology, a pathologically increased nasal resistance was found in 14.3%, while the corresponding figure in the dental group was 4.3%. Improved sinusal and nasal ventilation, achieved either pharmacologically or, preferably by surgical intervention, seems necessary for successful treatment of chronic maxillary sinusitis.

Adult↗
PubMedDate not supplied

Salivary kallikrein in Sjögren's syndrome.

Using a chromogenic substrate (H-D-Val-Leu-Arg-pNA) salivary kallikrein levels were measured in whole saliva samples from patients suffering from Sjögren's syndrome (SS). Compared to healthy control individuals, SS patients, especially those without corticosteroid medication, exhibited significantly elevated kallikrein levels. A diurnal variation was found with the highest kallikrein activities in morning saliva. No correlation between kallikrein levels and extension of the inflammation in labial salivary glands (focus score), salivary flow rates or diagnosis (primary versus secondary SS) could be observed. A pathogenic mechanism for kallikrein in autoimmune sialadenitis is discussed.

Aged↗
PubMedDate not supplied

MkII--a modified self-tapping Brånemark implant: 3-year results of a controlled prospective pilot study.

A modified self-tapping implant (MkII) with improved cutting characteristics has been designed for use in both maxillae and mandibles. Four sequential studies were conducted to evaluate the outcome of the MkII implant compared to the standard implant. The results presented here are from the extended pilot study that has been conducted as an intra-individual study of 103 patients; ie, each patient received both test (MkII) and control (standard Brånemark System) implants. Seventy patients were treated in the mandible and 33 in the maxilla. The cumulative survival rates and marginal bone resorption showed equivalent results for both test and control implants. Three-year cumulative survival rates were 87.9% and 86.8% for test and control implants in maxilla, respectively, and 99.5% and 100% in mandibles, respectively. The mean marginal bone resorption was approximately 0.5 (control) to (MK II) 0.6 mm after 3 years of function. A total of 288 test implants and 275 control implants were placed. All implants, both test and control, could be placed in an appropriate implant position, but 21.2% of the implants were not fully seated by machine power only; the use of a manual cylinder wrench for the final turns was necessary. During the last phase of the study, however, with an increase in twist-drill diameter from 3.0 to 3.15 mm and an increased motor torque, the prerequisites of successful implant placement into final position were met.

Adult↗
PubMedDate not supplied

Relationship between contact time measurements and PTV values when using the Periotest to measure implant stability.

PURPOSE: The Periotest is an electronic instrument that has been advocated for the measurement of implant stability and osseointegration. The aims of this investigation were to establish the relationship between contact time and PTV values when the Periotest was used to assess implants in vivo and in vitro, and to investigate the influence of the striking height of the Periotest handpiece and the length of implant abutment. MATERIALS AND METHODS: The accelerometer signal from a Periotest was captured and compared with the resulting PTV value. In vitro measurements of PTV and contract time were performed on a 3-mm abutment that had been attached to a 15-mm implant luted into an aluminium block, and were repeated on a patient in vivo. further measurements were made of the abutments of six implants in turn in the maxilla of the same patient. The standard abutment lengths on the implants were 3, 4 (x 2), 5.5 (x 2), and 7 mm. RESULTS: The results indicated that there was a linear relationship between contact time and PTV value for implants measured in vitro and in vivo. Greater scatter of the in vivo data was attributed to test and patient variables including striking position, distance, and damping as a result of the presence of soft tissue. There was a linear relationship between the PTV value and the striking height for implant measurements in vivo and in vitro. CONCLUSION: It can be concluded that the sensitivity of the Periotest to clinical variables including striking heights and handpiece angulation limit the application of the instrument as a clinical diagnostic aid to measure implant stability.

Dental Abutments↗