Rehabilitation of severely resorbed maxillae with zygomatic implants: an evaluation of implant stability, tissue conditions, and patients' opinion before and after treatment.
OBJECTIVE
The aim of the present study was to describe experiences of 11 consecutively treated patients who received zygomatic implants. Patient results were assessed through clinical and radiographic evaluations of tissue conditions, including resonance frequency analysis (RFA).


METHODS
Eleven patients were treated with implant-retained fixed prostheses. A total of 64 implants were placed, 22 of which were placed in the zygoma. Fixed prostheses were removed to allow clinical and radiographic evaluations at a follow-up visit 18 to 46 months following implant placement. RFA was performed on all implants. A visual analog scale was used to assess patient satisfaction before and after treatment.


RESULTS
All patients received implant-supported prostheses. All zygomatic implants demonstrated clinical signs of osseointegration. One anterior implant was lost during follow-up. Mean ISQ values for the zygomatic and anterior implants were 65.9 (range, 42 to 100) and 61.5 (range, 48 to 71), respectively. Twenty-four implants showed moderate inflammation, with 3 exhibiting severe inflammation. Most anterior implants (75.6%) showed a marginal bone recession of 1 thread or less. Four zygomatic implants showed bone loss of 4 to 5 threads, and 5 zygomatic implants exhibited no marginal bone support. Patients described significant improvement in chewing ability and esthetics but did not describe changes in speech.


CONCLUSIONS
The use of zygomatic implants can help the clinician avoid the need for bone grafting and reduce morbidity. In addition, it can shorten the treatment time considerably.


CONCLUSIONS
This preliminary report demonstrates that zygomatic implants can provide posterior support to fixed prostheses in patients who lack bone volume to place conventional implants without encroaching upon the maxillary sinus.
Farzad
Payam
P
Department of Oral and Maxillofacial Surgery, Central Hospital, 721 89 Västerås, Sweden. payamfarzad@hotmail.com
Andersson
Lars
L
Gunnarsson
Sten
S
Johansson
Berndt
B
D000328:Adult; D000368:Aged; D001862:Bone Resorption / Q000601:surgery*; D019094:Dental Prosthesis, Implant-Supported / Q000379:methods; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D008439:Maxillary Diseases / Q000601:surgery*; D008447:Maxillofacial Prosthesis / Q000523:psychology*; D019931:Maxillofacial Prosthesis Implantation / Q000379:methods* / Q000523:psychology; D008875:Middle Aged; D011859:Radiography; D015050:Zygoma